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YouTube 超快聊天

YouTube直播聊天的终极性能提升

当前为 2023-12-20 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.60.33
  4. // @license             MIT
  5. // @name:ja             YouTube スーパーファーストチャット
  6. // @name:zh-TW          YouTube 超快聊天
  7. // @name:zh-CN          YouTube 超快聊天
  8. // @icon                https://github.com/cyfung1031/userscript-supports/raw/main/icons/super-fast-chat.png
  9. // @namespace           UserScript
  10. // @match               https://www.youtube.com/live_chat*
  11. // @match               https://www.youtube.com/live_chat_replay*
  12. // @author              CY Fung
  13. // @run-at              document-start
  14. // @grant               none
  15. // @unwrap
  16. // @allFrames           true
  17. // @inject-into         page
  18. // @require             https://greasyfork.org/scripts/475632-ytconfighacks/code/ytConfigHacks.js?version=1252732
  19. //
  20. // @compatible          firefox Violentmonkey
  21. // @compatible          firefox Tampermonkey
  22. // @compatible          firefox FireMonkey
  23. // @compatible          chrome Violentmonkey
  24. // @compatible          chrome Tampermonkey
  25. // @compatible          opera Violentmonkey
  26. // @compatible          opera Tampermonkey
  27. // @compatible          safari Stay
  28. // @compatible          edge Violentmonkey
  29. // @compatible          edge Tampermonkey
  30. // @compatible          brave Violentmonkey
  31. // @compatible          brave Tampermonkey
  32. //
  33. // @description         Ultimate Performance Boost for YouTube Live Chats
  34. // @description:ja      YouTubeのライブチャットの究極のパフォーマンスブースト
  35. // @description:zh-TW   YouTube直播聊天的終極性能提升
  36. // @description:zh-CN   YouTube直播聊天的终极性能提升
  37. //
  38. // ==/UserScript==
  39.  
  40. ((__CONTEXT__) => {
  41.   'use strict';
  42.  
  43.   const ENABLE_REDUCED_MAXITEMS_FOR_FLUSH = true;         // TRUE to enable trimming down to MAX_ITEMS_FOR_FULL_FLUSH (25) messages when there are too many unrendered messages
  44.   const MAX_ITEMS_FOR_TOTAL_DISPLAY = 90;                 // By default, 250 latest messages will be displayed, but displaying MAX_ITEMS_FOR_TOTAL_DISPLAY (90) messages is already sufficient.
  45.   const MAX_ITEMS_FOR_FULL_FLUSH = 25;                    // If there are too many new (stacked) messages not yet rendered, clean all and flush MAX_ITEMS_FOR_FULL_FLUSH (25) latest messages then incrementally added back to MAX_ITEMS_FOR_TOTAL_DISPLAY (90) messages
  46.  
  47.   const ENABLE_NO_SMOOTH_TRANSFORM = true;                // Depends on whether you want the animation effect for new chat messages
  48.   const USE_OPTIMIZED_ON_SCROLL_ITEMS = true;             // TRUE for the majority
  49.   const USE_WILL_CHANGE_CONTROLLER = false;               // FALSE for the majority
  50.   const ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED = true;  // In Chrome, the rendering of new chat messages could be too fast for no smooth transform. 80ms delay of displaying new messages should be sufficient for element rendering.
  51.   const ENABLE_OVERFLOW_ANCHOR_PREFERRED = true;          // Enable `overflow-anchor: auto` to lock the scroll list at the bottom for no smooth transform.
  52.  
  53.   const FIX_SHOW_MORE_BUTTON_LOCATION = true;             // When there are voting options (bottom panel), move the "show more" button to the top.
  54.   const FIX_INPUT_PANEL_OVERFLOW_ISSUE = true;            // When the super chat button is flicking with color, the scrollbar might come out.
  55.   const FIX_INPUT_PANEL_BORDER_ISSUE = true;              // No border should be allowed if there is an empty input panel.
  56.   const SET_CONTAIN_FOR_CHATROOM = true;                  // Rendering hacks (`contain`) for chatroom elements. [ General ]
  57.  
  58.   const FORCE_CONTENT_VISIBILITY_UNSET = true;            // Content-visibility should be always VISIBLE for high performance and great rendering.
  59.   const FORCE_WILL_CHANGE_UNSET = true;                   // Will-change should be always UNSET (auto) for high performance and low energy impact.
  60.  
  61.   // Replace requestAnimationFrame timers with custom implementation
  62.   const ENABLE_RAF_HACK_TICKERS = true;           // When there is a ticker
  63.   const ENABLE_RAF_HACK_DOCKED_MESSAGE = true;    // To be confirmed
  64.   const ENABLE_RAF_HACK_INPUT_RENDERER = true;    // To be confirmed
  65.   const ENABLE_RAF_HACK_EMOJI_PICKER = true;      // When changing the page of the emoji picker
  66.  
  67.   // Force rendering all the character subsets of the designated font(s) before messages come (Pre-Rendering of Text)
  68.   const ENABLE_FONT_PRE_RENDERING_PREFERRED = 1 | 2 | 4 | 8 | 16;
  69.  
  70.   // Backdrop `filter: blur(4px)` inside the iframe can extend to the whole page, causing a negative visual impact on the video you are watching.
  71.   const NO_BACKDROP_FILTER_WHEN_MENU_SHOWN = true;
  72.  
  73.   // Data Manipulation for Participants (Participant List)
  74.   // << if DO_PARTICIPANT_LIST_HACKS >>
  75.   const DO_PARTICIPANT_LIST_HACKS = true;                     // TRUE for the majority
  76.   const SHOW_PARTICIPANT_CHANGES_IN_CONSOLE = false;          // Just too annoying to show them all in popular chat
  77.   const CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = true;  // Only consider changes in renderable content (not concerned with the last chat message of the participants)
  78.   const PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED = true;
  79.   // << end >>
  80.  
  81.   // show more button
  82.   const ENABLE_SHOW_MORE_BLINKER = true;                      // BLINK WHEN NEW MESSAGES COME
  83.  
  84.   // faster stampDomArray_ for participants list creation
  85.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL = 1;            // 0 - OFF; 1 - ON; 2 - ON(PARTICIPANTS_LIST ONLY)
  86.   const USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET = false;
  87.  
  88.   // reuse yt components
  89.   const ENABLE_FLAGS_REUSE_COMPONENTS = true;
  90.  
  91.   // images <Group#I01>
  92.   const AUTHOR_PHOTO_SINGLE_THUMBNAIL = 1;  // 0 - disable; 1- smallest; 2- largest
  93.   const EMOJI_IMAGE_SINGLE_THUMBNAIL = 1;   // 0 - disable; 1- smallest; 2- largest
  94.   const LEAST_IMAGE_SIZE = 48;              // minium size = 48px
  95.  
  96.   const DO_LINK_PREFETCH = true;                      // DO NOT CHANGE
  97.   // << if DO_LINK_PREFETCH >>
  98.   const ENABLE_BASE_PREFETCHING = true;               // (SUB-)DOMAIN | dns-prefetch & preconnect
  99.   const ENABLE_PRELOAD_THUMBNAIL = true;              // subresource (prefetch) [LINK for Images]
  100.   const PREFETCH_LIMITED_SIZE_EMOJI = 512;            // DO NOT CHANGE THIS
  101.   const PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO = 68;      // DO NOT CHANGE THIS
  102.   // << end >>
  103.  
  104.   const FIX_SETSRC_AND_THUMBNAILCHANGE_ = true;       // Function Replacement for yt-img-shadow....
  105.   const FIX_THUMBNAIL_DATACHANGED = true;             // Function Replacement for yt-live-chat-author-badge-renderer..dataChanged
  106.   // const REMOVE_PRELOADAVATARFORADDACTION = false;      // Function Replacement for yt-live-chat-renderer..preloadAvatarForAddAction
  107.  
  108.   const FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION = true;     // important [depends on <Group#I01>]
  109.   const FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT = true;  // [depends on <Group#I01>]
  110.  
  111.   const ATTEMPT_ANIMATED_TICKER_BACKGROUND = 'steps'   // false OR '' for disabled, 'linear', 'steps' for easing-function
  112.   // << if ATTEMPT_ANIMATED_TICKER_BACKGROUND >>
  113.   // BROWSER SUPPORT: Chrome 75+, Edge 79+, Safari 13.1+, Firefox 63+, Opera 62+
  114.   const TICKER_MAX_STEPS_LIMIT = 500;                       //  NOT LESS THAN 5 STEPS!!
  115.   // [limiting 500 max steps] is recommended for "confortable visual change"
  116.   //      min. step increment 0.2% => max steps: 500 =>  800ms per each update
  117.   //      min. step increment 0.5% => max steps: 200 => 1000ms per each update
  118.   //      min. step increment 1.0% => max steps: 100 => 1000ms per each update
  119.   //      min. step increment 2.5% => max steps:  40 => 1000ms per each update
  120.   //      min. step increment 5.0% => max steps:  20 => 1250ms per each update
  121.   const ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX = true;    // for video playback's ticker issue. [ Playback Replay - Pause at Middle - Backwards Seeking ]
  122.   // << end >>
  123.  
  124.   const FIX_TOOLTIP_DISPLAY = true;
  125.   const USE_VANILLA_DEREF = true;
  126.   const FIX_DROPDOWN_DERAF = true;                        // DONT CHANGE
  127.  
  128.  
  129.   const CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true;                // cache the menu data and used for the next reopen
  130.   const ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU = true;   // pause auto scroll faster when the context menu is about to show
  131.   const ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU = true;                // avoid multiple requests on the same time
  132.  
  133.   const BOOST_MENU_OPENCHANGED_RENDERING = true;
  134.   const FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK = true;  // click again = close
  135.   const NO_ITEM_TAP_FOR_NON_STATIONARY_TAP = true;                // dont open the menu (e.g. text message) if cursor is moved or long press
  136.   const TAP_ACTION_DURATION = 280;                                // exceeding 280ms would not consider as a tap action
  137.   const PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN = true;             // require CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true
  138.   // const FIX_MENU_CAPTURE_SCROLL = true;
  139.   const CHAT_MENU_REFIT_ALONG_SCROLLING = 0;                      // 0 for locking / default; 1 for unlocking only; 2 for unlocking and refit
  140.  
  141.   const RAF_FIX_keepScrollClamped = true;
  142.   const RAF_FIX_scrollIncrementally = 2;                          // 0: no action; 1: basic fix; 2: also fix scroll position
  143.  
  144.   // << if BOOST_MENU_OPENCHANGED_RENDERING >>
  145.   const FIX_MENU_POSITION_N_SIZING_ON_SHOWN = 1;       // correct size and position when the menu dropdown opens
  146.  
  147.   const CHECK_JSONPRUNE = true;                        // This is a bug in Brave
  148.   // << end >>
  149.  
  150.   // const LIVE_CHAT_FLUSH_ON_FOREGROUND_ONLY = false;
  151.  
  152.   const CHANGE_DATA_FLUSH_ASYNC = false;
  153.   // CHANGE_DATA_FLUSH_ASYNC is disabled due to bug report: https://greasyfork.org/scripts/469878-youtube-super-fast-chat/discussions/199479
  154.   // to be further investigated
  155.  
  156.   const CHANGE_MANAGER_UNSUBSCRIBE = true;
  157.  
  158.   const INTERACTIVITY_BACKGROUND_ANIMATION = 1;         // mostly for pinned message
  159.   // 0 = default Yt animation background [= no fix];
  160.   // 1 = disable default animation background [= keep special animation];
  161.   // 2 = disable all animation backgrounds [= no animation backbround]
  162.  
  163.   const CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED = true;
  164.  
  165.   const MAX_TOOLTIP_NO_WRAP_WIDTH = '72vw'; // '' for disable; accept values like '60px', '25vw'
  166.  
  167.   const AMEND_TICKER_handleLiveChatAction = true; // to fix ticker duplication and unresponsively fast ticker generation
  168.  
  169.   const ATTEMPT_TICKER_ANIMATION_START_TIME_DETECTION = true;
  170.   const ADJUST_TICKER_DURATION_ALIGN_RENDER_TIME = true;
  171.   const FIX_BATCH_TICKER_ORDER = true;
  172.  
  173.   const DISABLE_Translation_By_Google = true;
  174.  
  175.   const FASTER_ICON_RENDERING = true;
  176.  
  177.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  178.   /*
  179.  
  180.     ### Time Approach
  181.  
  182.     // all below values can make the time interval > 250ms
  183.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  184.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  185.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  186.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  187.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  188.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  189.  
  190.     ### Pixel Check
  191.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  192.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  193.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  194.  
  195.     ### Example - totalDuration = 280000
  196.     totalDuration 280000
  197.     stepInterval 0.5
  198.     numOfSteps = Math.round(100 / stepInterval) = 200
  199.     time interval = 280000 / 200 = 1400ms <acceptable>
  200.  
  201.     ### Example - totalDuration = 18000
  202.     totalDuration 18000
  203.     stepInterval 5
  204.     numOfSteps = Math.round(100 / stepInterval) = 20
  205.     time interval = 18000 / 20 = 900ms <acceptable>
  206.  
  207.     ### Example - totalDuration = 5000
  208.     totalDuration 5000
  209.     stepInterval 5
  210.     numOfSteps = Math.round(100 / stepInterval) = 20
  211.     time interval = 5000 / 20 = 250ms <threshold value>
  212.  
  213.     ### Example - totalDuration = 3600
  214.     totalDuration 3600
  215.     stepInterval 5
  216.     numOfSteps = Math.round(100 / stepInterval) = 20
  217.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  218.  
  219.   */
  220.  
  221.   // =======================================================================================================
  222.  
  223.   // AUTOMAICALLY DETERMINED
  224.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  225.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  226.   const CHAT_MENU_SCROLL_UNLOCKING = CHAT_MENU_REFIT_ALONG_SCROLLING >= 1;
  227.   let runTickerClassName = 'run-ticker';
  228.  
  229.   const dummyImgURL = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
  230.   /*
  231.     WebP: data:image/webp;base64,UklGRjAB
  232.     PNG: data:image/png;base64,iVBORw0KGg==
  233.     JPEG: data:image/jpeg;base64,/9j/4AA=
  234.     GIF: data:image/gif;base64,R0lGODlhAQABAIA=
  235.     BMP: data:image/bmp;base64,Qk1oAAAA
  236.     SVG: data:image/svg+xml;base64,PHN2Zy8+Cg==
  237.  
  238.     WebP: data:image/webp;base64,AAAAAAA=
  239.     PNG:  data:image/png;base64,AAAAAAA=
  240.     JPEG: data:image/jpeg;base64,AAAAAAA=
  241.     GIF:  data:image/gif;base64,AAAAAAA=
  242.     BMP:  data:image/bmp;base64,AAAAAAA=
  243.  
  244.     data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
  245.  
  246.  
  247.   */
  248.  
  249.   // image sizing code
  250.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  251.  
  252.  
  253.   //   function KC(a, b, c, d) {
  254.   //     d = void 0 === d ? "width" : d;
  255.   //     if (!a || !a.length)
  256.   //         return null;
  257.   //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  258.   //         var e = window.devicePixelRatio;
  259.   //         z("kevlar_tuner_should_clamp_device_pixel_ratio") ? e = Math.min(e, zl("kevlar_tuner_clamp_device_pixel_ratio")) : z("kevlar_tuner_should_use_thumbnail_factor") && (e = zl("kevlar_tuner_thumbnail_factor"));
  260.   //         HC = e
  261.   //     } else
  262.   //         HC || (HC = window.devicePixelRatio);
  263.   //     e = HC;
  264.   //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  265.   //     if (z("kevlar_tuner_min_thumbnail_quality"))
  266.   //         return a[0].url || null;
  267.   //     e = a.length;
  268.   //     if (z("kevlar_tuner_max_thumbnail_quality"))
  269.   //         return a[e - 1].url || null;
  270.   //     if (c)
  271.   //         for (var h = 0; h < e; h++)
  272.   //             if (0 <= a[h].url.indexOf(c))
  273.   //                 return a[h].url || null;
  274.   //     for (c = 0; c < e; c++)
  275.   //         if (a[c][d] >= b)
  276.   //             return a[c].url || null;
  277.   //     for (b = e - 1; 0 < b; b--)
  278.   //         if (a[b][d])
  279.   //             return a[b].url || null;
  280.   //     return a[0].url || null
  281.   // }
  282.  
  283.   const { IntersectionObserver } = __CONTEXT__;
  284.  
  285.   /** @type {globalThis.PromiseConstructor} */
  286.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  287.  
  288.   // let jsonParseFix = null;
  289.  
  290.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.");
  291.   if (typeof WebAssembly !== 'object') return console.warn("Your browser is too old.\nPlease upgrade to the latest version."); // for passive and once
  292.  
  293.   // necessity of cssText3_smooth_transform_position to be checked.
  294.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  295.  
  296.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  297.         position: static !important;
  298.     }
  299.  
  300.   `: '';
  301.  
  302.   // fallback if dummy style fn fails
  303.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  304.  
  305.     /* optional */
  306.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  307.         height: auto !important;
  308.         min-height: unset !important;
  309.     }
  310.  
  311.     #items.style-scope.yt-live-chat-item-list-renderer {
  312.         transform: translateY(0px) !important;
  313.     }
  314.  
  315.     /* optional */
  316.  
  317.   `: '';
  318.  
  319.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  320.  
  321.     /* ------------------------------------------------------------------------------------------------------------- */
  322.  
  323.     yt-live-chat-author-chip #chat-badges.yt-live-chat-author-chip, yt-live-chat-author-chip #chat-badges.yt-live-chat-author-chip yt-live-chat-author-badge-renderer, yt-live-chat-author-chip #chat-badges.yt-live-chat-author-chip yt-live-chat-author-badge-renderer #image, yt-live-chat-author-chip #chat-badges.yt-live-chat-author-chip yt-live-chat-author-badge-renderer #image img {
  324.         contain: layout style;
  325.     }
  326.  
  327.     #items.style-scope.yt-live-chat-item-list-renderer {
  328.         contain: layout paint style;
  329.     }
  330.  
  331.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  332.         contain: style;
  333.     }
  334.  
  335.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  336.         contain: size style;
  337.     }
  338.  
  339.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  340.         contain: size layout paint style;
  341.     }
  342.  
  343.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  344.         contain: layout paint style;
  345.     }
  346.  
  347.     yt-live-chat-text-message-renderer.style-scope.yt-live-chat-item-list-renderer, yt-live-chat-membership-item-renderer.style-scope.yt-live-chat-item-list-renderer, yt-live-chat-paid-message-renderer.style-scope.yt-live-chat-item-list-renderer, yt-live-chat-banner-manager.style-scope.yt-live-chat-item-list-renderer {
  348.         contain: layout style;
  349.     }
  350.  
  351.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  352.         contain: layout paint style;
  353.     }
  354.  
  355.     /* ------------------------------------------------------------------------------------------------------------- */
  356.  
  357.   ` : '';
  358.  
  359.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  360.  
  361.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  362.         top: 4px;
  363.         transition-property: top;
  364.         bottom: unset;
  365.     }
  366.  
  367.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  368.         top: -42px;
  369.     }
  370.  
  371.   `: '';
  372.  
  373.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  374.  
  375.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  376.         contain: layout style;
  377.     }
  378.  
  379.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  380.         overflow: visible;
  381.     }
  382.  
  383.   `: '';
  384.  
  385.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  386.  
  387.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  388.         --yt-live-chat-action-panel-top-border: none;
  389.     }
  390.  
  391.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  392.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  393.     }
  394.  
  395.     html #panel-pages.yt-live-chat-renderer {
  396.         border-top: 0;
  397.         border-bottom: 0;
  398.     }
  399.  
  400.   `: '';
  401.  
  402.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  403.  
  404.     img,
  405.     yt-img-shadow[height][width],
  406.     yt-img-shadow {
  407.         content-visibility: visible !important;
  408.     }
  409.  
  410.   `  : '';
  411.  
  412.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  413.  
  414.     /* remove YouTube constant will-change */
  415.     /* constant value will slow down the performance; default auto */
  416.  
  417.     /* www-player.css */
  418.     html .ytp-contextmenu,
  419.     html .ytp-settings-menu {
  420.         will-change: unset;
  421.     }
  422.  
  423.     /* frequently matched elements */
  424.     html .fill.yt-interaction,
  425.     html .stroke.yt-interaction,
  426.     html .yt-spec-touch-feedback-shape__fill,
  427.     html .yt-spec-touch-feedback-shape__stroke {
  428.         will-change: unset;
  429.     }
  430.  
  431.     /* live_chat_polymer.js */
  432.     /*
  433.     html .toggle-button.tp-yt-paper-toggle-button,
  434.     html #primaryProgress.tp-yt-paper-progress,
  435.     html #secondaryProgress.tp-yt-paper-progress,
  436.     html #onRadio.tp-yt-paper-radio-button,
  437.     html .fill.yt-interaction,
  438.     html .stroke.yt-interaction,
  439.     html .yt-spec-touch-feedback-shape__fill,
  440.     html .yt-spec-touch-feedback-shape__stroke {
  441.         will-change: unset;
  442.     }
  443.     */
  444.  
  445.     /* desktop_polymer_enable_wil_icons.js */
  446.     /* html .fill.yt-interaction,
  447.     html .stroke.yt-interaction, */
  448.     html tp-yt-app-header::before,
  449.     html tp-yt-iron-list,
  450.     html #items.tp-yt-iron-list > *,
  451.     html #onRadio.tp-yt-paper-radio-button,
  452.     html .toggle-button.tp-yt-paper-toggle-button,
  453.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  454.     html #items.ytd-post-multi-image-renderer,
  455.     html #items.ytd-horizontal-card-list-renderer,
  456.     html #items.yt-horizontal-list-renderer,
  457.     html #left-arrow.yt-horizontal-list-renderer,
  458.     html #right-arrow.yt-horizontal-list-renderer,
  459.     html #items.ytd-video-description-infocards-section-renderer,
  460.     html #items.ytd-video-description-music-section-renderer,
  461.     html #chips.ytd-feed-filter-chip-bar-renderer,
  462.     html #chips.yt-chip-cloud-renderer,
  463.     html #items.ytd-merch-shelf-renderer,
  464.     html #items.ytd-product-details-image-carousel-renderer,
  465.     html ytd-video-preview,
  466.     html #player-container.ytd-video-preview,
  467.     html #primaryProgress.tp-yt-paper-progress,
  468.     html #secondaryProgress.tp-yt-paper-progress,
  469.     html ytd-miniplayer[enabled] /* ,
  470.     html .yt-spec-touch-feedback-shape__fill,
  471.     html .yt-spec-touch-feedback-shape__stroke */ {
  472.         will-change: unset;
  473.     }
  474.  
  475.     /* other */
  476.     .ytp-videowall-still-info-content[class],
  477.     .ytp-suggestion-image[class] {
  478.         will-change: unset !important;
  479.     }
  480.  
  481.   ` : '';
  482.  
  483.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  484.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  485.  
  486.     elzm-fonts {
  487.         visibility: collapse;
  488.         position: fixed;
  489.         top: -10px;
  490.         left: -10px;
  491.         font-size: 10pt;
  492.         line-height: 100%;
  493.         width: 100px;
  494.         height: 100px;
  495.         transform: scale(0.1);
  496.         transform: scale(0.01);
  497.         transform: scale(0.001);
  498.         transform-origin: 0 0;
  499.         contain: strict;
  500.         display: block;
  501.  
  502.         pointer-events: none !important;
  503.         user-select: none !important;
  504.     }
  505.  
  506.     elzm-fonts[id]#elzm-fonts-yk75g {
  507.         user-select: none !important;
  508.         pointer-events: none !important;
  509.     }
  510.  
  511.     elzm-font {
  512.         visibility: collapse;
  513.         position: absolute;
  514.         line-height: 100%;
  515.         width: 100px;
  516.         height: 100px;
  517.         contain: strict;
  518.         display: block;
  519.  
  520.         user-select: none !important;
  521.         pointer-events: none !important;
  522.     }
  523.  
  524.     elzm-font::before {
  525.         visibility: collapse;
  526.         position: absolute;
  527.         line-height: 100%;
  528.         width: 100px;
  529.         height: 100px;
  530.         contain: strict;
  531.         display: block;
  532.  
  533.         content: '0aZ!@#$~^&*()_-+[]{}|;:><?\\0460\\0301\\0900\\1F00\\0370\\0102\\0100\\28EB2\\28189\\26DA0\\25A9C\\249BB\\23F61\\22E8B\\21927\\21076\\2048E\\1F6F5\\FF37\\F94F\\F0B2\\9F27\\9D9A\\9BEA\\9A6B\\98EC\\9798\\9602\\949D\\9370\\926B\\913A\\8FA9\\8E39\\8CC1\\8B26\\8983\\8804\\8696\\8511\\83BC\\828D\\8115\\7F9A\\7E5B\\7D07\\7B91\\7A2C\\78D2\\776C\\7601\\74AA\\73B9\\7265\\70FE\\6FBC\\6E88\\6D64\\6C3F\\6A9C\\6957\\67FE\\66B3\\6535\\63F2\\628E\\612F\\5FE7\\5E6C\\5CEE\\5B6D\\5A33\\58BC\\575B\\5611\\54BF\\536E\\51D0\\505D\\4F22\\4AD1\\41DB\\3B95\\3572\\2F3F\\26FD\\25A1\\2477\\208D\\1D0A\\1FB\\A1\\A3\\B4\\2CB\\60\\10C\\E22\\A5\\4E08\\B0\\627\\2500\\5E\\201C\\3C\\B7\\23\\26\\3E\\D\\20\\25EE8\\1F235\\FFD7\\FA10\\F92D\\9E8B\\9C3E\\9AE5\\98EB\\971D\\944A\\92BC\\9143\\8F52\\8DC0\\8B2D\\8973\\87E2\\8655\\84B4\\82E8\\814A\\7F77\\7D57\\7BC8\\7A17\\7851\\768C\\7511\\736C\\7166\\6F58\\6D7C\\6B85\\69DD\\6855\\667E\\64D2\\62CF\\6117\\5F6C\\5D9B\\5BBC\\598B\\57B3\\5616\\543F\\528D\\50DD\\4F57\\4093\\3395\\32B5\\31C8\\3028\\2F14\\25E4\\24D1\\2105\\2227\\A8\\2D9\\2CA\\2467\\B1\\2020\\2466\\251C\\266B\\AF\\4E91\\221E\\2464\\2266\\2207\\4E32\\25B3\\2463\\2010\\2103\\3014\\25C7\\24\\25BD\\4E18\\2460\\21D2\\2015\\2193\\4E03\\7E\\25CB\\2191\\25BC\\3D\\500D\\4E01\\25\\30F6\\2605\\266A\\40\\2B\\4E16\\7C\\A9\\4E\\21\\1F1E9\\FEE3\\F0A7\\9F3D\\9DFA\\9C3B\\9A5F\\98C8\\972A\\95B9\\94E7\\9410\\92B7\\914C\\8FE2\\8E2D\\8CAF\\8B5E\\8A02\\8869\\86E4\\8532\\83B4\\82A9\\814D\\7FFA\\7ED7\\7DC4\\7CCC\\7BC3\\7ACA\\797C\\783E\\770F\\760A\\74EF\\73E7\\72DD\\719C\\7005\\6ED8\\6DC3\\6CB2\\6A01\\68E1\\6792\\663A\\64F8\\63BC\\623B\\60FA\\5FD1\\5EA3\\5D32\\5BF5\\5AB2\\5981\\5831\\570A\\5605\\5519\\53FB\\52A2\\5110\\4FE3\\4EB8\\3127\\279C\\2650\\254B\\23E9\\207B\\1D34\\2AE\\176\\221A\\161\\200B\\300C\\4E4C\\1F921\\FF78\\FA0A\\F78A\\9EB9\\9D34\\9BD3\\9A6F\\9912\\97C6\\964E\\950C\\93E4\\92E5\\91F0\\90BB\\8F68\\8E18\\8B6C\\89F6\\889B\\874C\\8602\\84B1\\8378\\826E\\8113\\7FB1\\7EAF\\7D89\\7C20\\7AFB\\7988\\7840\\7705\\75CC\\749A\\73B3\\727F\\7113\\6FE8\\6ED6\\6DD3\\6CDA\\6BBB\\6A31\\6900\\67D9\\66A7\\655D\\6427\\630D\\61C6\\60AC\\5F78\\5E34\\5CE0\\5B80\\5A51\\590B\\57A1\\566F\\5551\\543D\\52DB\\518F\\5032\\3A17\\305C\\2749\\264A\\2567\\2476\\2139\\1EC0\\11AF\\2C8\\1AF\\E17\\2190\\2022\\2502\\2312\\2025\\50';
  534.  
  535.         user-select: none !important;
  536.         pointer-events: none !important;
  537.     }
  538.  
  539.   `: '';
  540.  
  541.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  542.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  543.         -webkit-backdrop-filter: none;
  544.         backdrop-filter: none;
  545.     }
  546.   `: '';
  547.  
  548.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  549.  
  550.     @keyframes blinker-miuzp {
  551.         0%, 60%, 100% {
  552.             opacity: 1;
  553.         }
  554.         30% {
  555.             opacity: 0.6;
  556.         }
  557.     }
  558.  
  559.     yt-icon-button#show-more.has-new-messages-miuzp {
  560.         animation: blinker-miuzp 1.74s linear infinite;
  561.     }
  562.  
  563.   `: '';
  564.  
  565.   const cssText11_entire_message_clickable = FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK ? `
  566.  
  567.     yt-live-chat-paid-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  568.       pointer-events: none !important;
  569.     }
  570.  
  571.     yt-live-chat-membership-item-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  572.       pointer-events: none !important;
  573.     }
  574.  
  575.     yt-live-chat-paid-sticker-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  576.       pointer-events: none !important;
  577.     }
  578.  
  579.     yt-live-chat-text-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  580.       pointer-events: none !important; /* TO_BE_REVIEWED */
  581.     }
  582.  
  583.     yt-live-chat-auto-mod-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  584.       pointer-events: none !important;
  585.     }
  586.  
  587.   `: '';
  588.  
  589.   const cssText12_nowrap_tooltip = MAX_TOOLTIP_NO_WRAP_WIDTH && typeof MAX_TOOLTIP_NO_WRAP_WIDTH === 'string' ? `
  590.  
  591.  
  592.     tp-yt-paper-tooltip[role="tooltip"] {
  593.       box-sizing: content-box !important;
  594.       margin: 0px !important;
  595.       padding: 0px !important;
  596.       contain: none !important;
  597.     }
  598.  
  599.     tp-yt-paper-tooltip[role="tooltip"] #tooltip[style-target="tooltip"] {
  600.       box-sizing: content-box !important;
  601.       display: inline-block;
  602.       contain: none !important;
  603.     }
  604.  
  605.  
  606.     tp-yt-paper-tooltip[role="tooltip"] #tooltip[style-target="tooltip"]{
  607.       max-width: ${MAX_TOOLTIP_NO_WRAP_WIDTH};
  608.       width: max-content;
  609.       text-overflow: ellipsis;
  610.       overflow: hidden;
  611.       white-space: nowrap;
  612.     }
  613.  
  614.  
  615.   `: '';
  616.  
  617.  
  618.   const cssText13_no_text_select_when_menu_visible = `
  619.     [menu-visible] {
  620.       --sfc47-text-select: none;
  621.     }
  622.     [menu-visible] #header[id][class],
  623.     [menu-visible] #content[id][class],
  624.     [menu-visible] #header[id][class] *,
  625.     [menu-visible] #content[id][class] * {
  626.       user-select: var(--sfc47-text-select) !important;
  627.     }
  628.     [menu-visible] #menu {
  629.       --sfc47-text-select: inherit;
  630.     }
  631.   `
  632.  
  633.  
  634.   const addCss = () => `
  635.  
  636.     @property --ticker-rtime {
  637.       syntax: "<percentage>";
  638.       inherits: false;
  639.       initial-value: 0%;
  640.     }
  641.  
  642.     /*
  643.     .run-ticker {
  644.       background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  645.     }
  646.  
  647.     .run-ticker-test {
  648.       background: #00000001;
  649.     }
  650.  
  651.     .run-ticker-forced,
  652.     yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  653.     yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  654.     {
  655.       background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  656.     }
  657.     */
  658.  
  659.     .run-ticker {
  660.       --ticker-bg:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  661.     }
  662.  
  663.     .run-ticker,
  664.     yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  665.     yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  666.     {
  667.       background: var(--ticker-bg) !important;
  668.     }
  669.  
  670.     yt-live-chat-ticker-dummy777-item-renderer {
  671.       background: #00000001;
  672.     }
  673.  
  674.     yt-live-chat-ticker-dummy777-item-renderer[dummy777] {
  675.       position: fixed !important;
  676.       top: -1000px !important;
  677.       left: -1000px !important;
  678.       font-size: 1px !important;
  679.       color: transparent !important;
  680.       pointer-events: none !important;
  681.       z-index: -1 !important;
  682.       contain: strict !important;
  683.       box-sizing: border-box !important;
  684.       pointer-events: none !important;
  685.       user-select: none !important;
  686.       max-width: 1px !important;
  687.       max-height: 1px !important;
  688.       overflow: hidden !important;
  689.       visibility: collapse !important;
  690.       display: none !important;
  691.     }
  692.  
  693.     yt-live-chat-ticker-dummy777-item-renderer #container {
  694.       background: inherit;
  695.     }
  696.  
  697.  
  698.     ${cssText8_fonts_pre_render}
  699.  
  700.     ${cssText9_no_backdrop_filter_when_menu_shown}
  701.  
  702.     @supports (contain: layout paint style) {
  703.  
  704.       ${cssText5}
  705.  
  706.     }
  707.  
  708.     @supports (color: var(--general)) {
  709.  
  710.       html {
  711.           --yt-live-chat-item-list-renderer-padding: 0px 0px;
  712.       }
  713.  
  714.       ${cssText3_smooth_transform_position}
  715.  
  716.       ${cssText7c_will_change_unset}
  717.  
  718.       ${cssText7b_content_visibility_unset}
  719.  
  720.       yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  721.           overflow-y: scroll;
  722.           padding-right: 0;
  723.       }
  724.  
  725.       ${cssText4_smooth_transform_forced_props}
  726.  
  727.       yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  728.           pointer-events: none !important;
  729.       }
  730.  
  731.       #continuations, #continuations * {
  732.           contain: strict;
  733.           position: fixed;
  734.           top: 2px;
  735.           height: 1px;
  736.           width: 2px;
  737.           height: 1px;
  738.           visibility: collapse;
  739.       }
  740.  
  741.       ${cssText6b_show_more_button}
  742.  
  743.       ${cssText6d_input_panel_border}
  744.  
  745.       ${cssText6c_input_panel_overflow}
  746.  
  747.     }
  748.  
  749.  
  750.     @supports (overflow-anchor: auto) {
  751.  
  752.       .no-anchor * {
  753.           overflow-anchor: none;
  754.       }
  755.       .no-anchor > item-anchor {
  756.           overflow-anchor: auto;
  757.       }
  758.  
  759.       item-anchor {
  760.  
  761.           height:1px;
  762.           width: 100%;
  763.           transform: scaleY(0.00001);
  764.           transform-origin:0 0;
  765.           contain: strict;
  766.           opacity:0;
  767.           display:flex;
  768.           position:relative;
  769.           flex-shrink:0;
  770.           flex-grow:0;
  771.           margin-bottom:0;
  772.           overflow:hidden;
  773.           box-sizing:border-box;
  774.           visibility: visible;
  775.           content-visibility: visible;
  776.           contain-intrinsic-size: auto 1px;
  777.           pointer-events:none !important;
  778.  
  779.       }
  780.  
  781.       #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  782.           overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  783.       }
  784.  
  785.       html item-anchor {
  786.  
  787.           height: 1px;
  788.           width: 1px;
  789.           top: auto;
  790.           left: auto;
  791.           right: auto;
  792.           bottom: auto;
  793.           transform: translateY(-1px);
  794.           position: absolute;
  795.           z-index: -1;
  796.  
  797.       }
  798.  
  799.     }
  800.  
  801.     @supports (color: var(--pre-rendering)) {
  802.  
  803.       @keyframes dontRenderAnimation {
  804.           0% {
  805.               background-position-x: 3px;
  806.           }
  807.           100% {
  808.               background-position-x: 4px;
  809.           }
  810.       }
  811.  
  812.       .dont-render[class] {
  813.           /* visibility: collapse !important; */
  814.           /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  815.  
  816.           transform: scale(0.01) !important;
  817.           transform: scale(0.00001) !important;
  818.           transform: scale(0.0000001) !important;
  819.           transform-origin: 0 0 !important;
  820.           z-index: -1 !important;
  821.           contain: strict !important;
  822.           box-sizing: border-box !important;
  823.  
  824.           height: 1px !important;
  825.           height: 0.1px !important;
  826.           height: 0.01px !important;
  827.           height: 0.0001px !important;
  828.           height: 0.000001px !important;
  829.  
  830.           animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  831.  
  832.           pointer-events: none !important;
  833.           user-select: none !important;
  834.  
  835.       }
  836.  
  837.       #sk35z {
  838.         display: block !important;
  839.  
  840.         visibility: collapse !important;
  841.  
  842.         transform: scale(0.01) !important;
  843.         transform: scale(0.00001) !important;
  844.         transform: scale(0.0000001) !important;
  845.         transform-origin: 0 0 !important;
  846.         z-index: -1 !important;
  847.         contain: strict !important;
  848.         box-sizing: border-box !important;
  849.  
  850.         height: 1px !important;
  851.         height: 0.1px !important;
  852.         height: 0.01px !important;
  853.         height: 0.0001px !important;
  854.         height: 0.000001px !important;
  855.  
  856.         position: absolute !important;
  857.         top: -1000px !important;
  858.         left: -1000px !important;
  859.  
  860.       }
  861.  
  862.     }
  863.  
  864.     [rNgzQ] {
  865.       opacity: 0 !important;
  866.       pointer-events: none !important;
  867.     }
  868.  
  869.  
  870.     ${cssText10_show_more_blinker}
  871.  
  872.     ${cssText11_entire_message_clickable}
  873.  
  874.     ${cssText12_nowrap_tooltip}
  875.  
  876.     ${cssText13_no_text_select_when_menu_visible}
  877.  
  878.   `;
  879.  
  880.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  881.  
  882.   // Create a unique key for the script and check if it is already running
  883.   const hkey_script = 'mchbwnoasqph';
  884.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  885.   win[hkey_script] = true;
  886.  
  887.   if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  888.  
  889.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  890.     if (te4 < 3) {
  891.       setTimeout(() => { });
  892.       setTimeout(() => { });
  893.     }
  894.  
  895.   }
  896.  
  897.   const firstKey = (obj) => {
  898.     for (const key in obj) {
  899.       if (obj.hasOwnProperty(key)) return key;
  900.     }
  901.     return null;
  902.   }
  903.  
  904.   const firstObjectKey = (obj) => {
  905.     for (const key in obj) {
  906.       if (obj.hasOwnProperty(key) && typeof obj[key] === 'object') return key;
  907.     }
  908.     return null;
  909.   }
  910.  
  911.   function removeElementFromArray(arr, index) {
  912.     if (index >= 0 && index < arr.length) {
  913.       arr.splice(index, 1);
  914.     }
  915.   }
  916.  
  917.   function getRandomInt(a, b) {
  918.     // Ensure that 'a' and 'b' are integers
  919.     a = Math.ceil(a);
  920.     b = Math.floor(b);
  921.  
  922.     // Generate a random integer in the range [a, b]
  923.     return Math.floor(Math.random() * (b - a + 1)) + a;
  924.   }
  925.  
  926.   function deepCopy(obj, skipKeys) {
  927.     skipKeys = skipKeys || [];
  928.     if (!obj || typeof obj !== 'object') return obj;
  929.     if (Array.isArray(obj)) {
  930.       return obj.map(item => deepCopy(item, skipKeys));
  931.     }
  932.     const copy = {};
  933.     for (let key in obj) {
  934.       if (!skipKeys.includes(key)) {
  935.         copy[key] = deepCopy(obj[key], skipKeys);
  936.       }
  937.     }
  938.     return copy;
  939.   }
  940.  
  941.   class Mutex {
  942.  
  943.     constructor() {
  944.       this.p = Promise.resolve()
  945.     }
  946.  
  947.     /**
  948.      *  @param {(lockResolve: () => void)} f
  949.      */
  950.     lockWith(f) {
  951.       this.p = this.p.then(() => new Promise(f).catch(console.warn))
  952.     }
  953.  
  954.   }
  955.  
  956.   const PromiseExternal = ((resolve_, reject_) => {
  957.     const h = (resolve, reject) => { resolve_ = resolve; reject_ = reject };
  958.     return class PromiseExternal extends Promise {
  959.       constructor(cb = h) {
  960.         super(cb);
  961.         if (cb === h) {
  962.           /** @type {(value: any) => void} */
  963.           this.resolve = resolve_;
  964.           /** @type {(reason?: any) => void} */
  965.           this.reject = reject_;
  966.         }
  967.       }
  968.     };
  969.   })();
  970.  
  971.   /** @type {typeof PromiseExternal.prototype | null} */
  972.   let relayPromise = null;
  973.  
  974.  
  975.   /** @type {typeof PromiseExternal.prototype | null} */
  976.   let onPlayStateChangePromise = null;
  977.  
  978.  
  979.  
  980.   let playEventsStack = Promise.resolve();
  981.  
  982.  
  983.   let playerProgressChangedArg1 = null;
  984.   let playerProgressChangedArg2 = null;
  985.   let playerProgressChangedArg3 = null;
  986.  
  987.  
  988.   function dr(s) {
  989.     // reserved for future use
  990.     return s;
  991.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  992.   }
  993.  
  994.   const insp = o => o ? (o.polymerController || o.inst || o || 0) : (o || 0);
  995.   const indr = o => insp(o).$ || o.$ || 0;
  996.  
  997.   const getProto = (element) => {
  998.     if (element) {
  999.       const cnt = insp(element);
  1000.       return cnt.constructor.prototype || null;
  1001.     }
  1002.     return null;
  1003.   }
  1004.  
  1005.   const assertor = (f) => f() || console.assert(false, f + "");
  1006.  
  1007.   const fnIntegrity = (f, d) => {
  1008.     if (!f || typeof f !== 'function') {
  1009.       console.warn('f is not a function', f);
  1010.       return;
  1011.     }
  1012.     let p = f + "", s = 0, j = -1, w = 0;
  1013.     for (let i = 0, l = p.length; i < l; i++) {
  1014.       const t = p[i];
  1015.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  1016.         if (j < i - 1) w++;
  1017.         j = i;
  1018.       } else {
  1019.         s++;
  1020.       }
  1021.     }
  1022.     let itz = `${f.length}.${s}.${w}`;
  1023.     if (!d) {
  1024.       return itz;
  1025.     } else if (itz !== d) {
  1026.       console.warn('fnIntegrity=false', itz);
  1027.       return false;
  1028.     } else {
  1029.       return true;
  1030.     }
  1031.   }
  1032.  
  1033.  
  1034.   const px2cm = (px) => px * window.devicePixelRatio * 0.026458333;
  1035.   const px2mm = (px) => px * window.devicePixelRatio * 0.26458333;
  1036.  
  1037.  
  1038.   ; (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) && (() => {
  1039.  
  1040.     const _config_ = () => {
  1041.       try {
  1042.         return ytcfg.data_;
  1043.       } catch (e) { }
  1044.       return null;
  1045.     };
  1046.  
  1047.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1048.  
  1049.       // console.log(700)
  1050.  
  1051.       if (!EXPERIMENT_FLAGS) return;
  1052.  
  1053.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1054.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1055.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1056.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1057.           // console.log(701)
  1058.         }
  1059.       }
  1060.  
  1061.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1062.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1063.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1064.         // console.log(702);
  1065.       }
  1066.  
  1067.     };
  1068.  
  1069.     const uf = (config_) => {
  1070.       config_ = config_ || _config_();
  1071.       if (config_) {
  1072.         const { EXPERIMENT_FLAGS, EXPERIMENTS_FORCED_FLAGS } = config_;
  1073.         if (EXPERIMENT_FLAGS) {
  1074.           flagsFn(EXPERIMENT_FLAGS);
  1075.           if (EXPERIMENTS_FORCED_FLAGS) flagsFn(EXPERIMENTS_FORCED_FLAGS);
  1076.         }
  1077.       }
  1078.     }
  1079.  
  1080.     window._ytConfigHacks.add((config_) => {
  1081.       uf(config_);
  1082.     });
  1083.  
  1084.     uf();
  1085.  
  1086.   })();
  1087.  
  1088.   if (DISABLE_Translation_By_Google) {
  1089.  
  1090.     let mo = new MutationObserver(() => {
  1091.  
  1092.       if (!mo) return;
  1093.       let h = document.head;
  1094.       if (!h) return;
  1095.       mo.disconnect();
  1096.       mo.takeRecords();
  1097.       mo = null;
  1098.  
  1099.       let meta = document.createElement('meta');
  1100.       meta.setAttribute('name', 'google');
  1101.       meta.setAttribute('content', 'notranslate');
  1102.       h.appendChild(meta);
  1103.  
  1104.  
  1105.     });
  1106.     mo.observe(document, { subtree: true, childList: true });
  1107.   }
  1108.  
  1109.  
  1110.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  1111.  
  1112.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  1113.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  1114.   if (!isContainSupport) {
  1115.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  1116.   } else {
  1117.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  1118.   }
  1119.  
  1120.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  1121.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  1122.   if (!isOverflowAnchorSupport) {
  1123.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  1124.   } else {
  1125.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  1126.   }
  1127.  
  1128.   const NOT_FIREFOX = !CSS.supports('-moz-appearance', 'none'); // 1. Firefox does not have the flicking issue; 2. Firefox's OVERFLOW_ANCHOR is less effective than Chromium's.
  1129.  
  1130.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  1131.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  1132.  
  1133.   let hasTimerModified = null;
  1134.   const DO_CHECK_TICKER_BACKGROUND_OVERRIDED = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND || ENABLE_RAF_HACK_TICKERS;
  1135.  
  1136.   const fxOperator = (proto, propertyName) => {
  1137.     let propertyDescriptorGetter = null;
  1138.     try {
  1139.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  1140.     } catch (e) { }
  1141.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  1142.       try {
  1143.  
  1144.         return propertyDescriptorGetter.call(dr(e));
  1145.       } catch (e) { }
  1146.       return e[propertyName];
  1147.     } : (e) => e[propertyName];
  1148.   };
  1149.  
  1150.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  1151.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  1152.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  1153.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  1154.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  1155.  
  1156.   const groupCollapsed = (text1, text2) => {
  1157.  
  1158.     console.groupCollapsed(`%c${text1}%c${text2}`,
  1159.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  1160.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  1161.     );
  1162.   }
  1163.  
  1164.   // const microNow = () => performance.now() + (performance.timeOrigin || performance.timing.navigationStart);
  1165.  
  1166.  
  1167.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  1168.   const onRegistryReady = (callback) => {
  1169.     if (typeof customElements === 'undefined') {
  1170.       if (!('__CE_registry' in document)) {
  1171.         // https://github.com/webcomponents/polyfills/
  1172.         Object.defineProperty(document, '__CE_registry', {
  1173.           get() {
  1174.             // return undefined
  1175.           },
  1176.           set(nv) {
  1177.             if (typeof nv == 'object') {
  1178.               delete this.__CE_registry;
  1179.               this.__CE_registry = nv;
  1180.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  1181.             }
  1182.             return true;
  1183.           },
  1184.           enumerable: false,
  1185.           configurable: true
  1186.         })
  1187.       }
  1188.       let eventHandler = (evt) => {
  1189.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  1190.         const f = callback;
  1191.         callback = null;
  1192.         eventHandler = null;
  1193.         f();
  1194.       };
  1195.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  1196.     } else {
  1197.       callback();
  1198.     }
  1199.   };
  1200.  
  1201.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  1202.  
  1203.   const renderReadyPn = typeof ResizeObserver !== 'undefined' ? (sizingTarget) => {
  1204.  
  1205.     return new Promise(resolve => {
  1206.  
  1207.       let ro = new ResizeObserver(entries => {
  1208.         if (entries && entries.length >= 1) {
  1209.           resolve();
  1210.           ro.disconnect();
  1211.           ro = null;
  1212.         }
  1213.       });
  1214.       ro.observe(sizingTarget);
  1215.  
  1216.  
  1217.  
  1218.     });
  1219.  
  1220.   } : (sizingTarget) => {
  1221.  
  1222.  
  1223.     return new Promise(resolve => {
  1224.  
  1225.       let io = new IntersectionObserver(entries => {
  1226.         if (entries && entries.length >= 1) {
  1227.           resolve();
  1228.           io.disconnect();
  1229.           io = null;
  1230.         }
  1231.       });
  1232.       io.observe(sizingTarget);
  1233.  
  1234.  
  1235.  
  1236.     });
  1237.  
  1238.   };
  1239.  
  1240.   /* globals WeakRef:false */
  1241.  
  1242.   /** @type {(o: Object | null) => WeakRef | null} */
  1243.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  1244.  
  1245.   /** @type {(wr: Object | null) => Object | null} */
  1246.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  1247.  
  1248.   const getLCRDummy = () => {
  1249.     // direct createElement or createComponent_ will make the emoji rendering crashed. reason TBC
  1250.  
  1251.     return Promise.all([customElements.whenDefined('yt-live-chat-app'), customElements.whenDefined('yt-live-chat-renderer')]).then(async () => {
  1252.  
  1253.       const tag = "yt-live-chat-renderer"
  1254.       let dummy = document.querySelector(tag);
  1255.       if (!dummy) {
  1256.  
  1257.         let mo = null;
  1258.  
  1259.         const ytLiveChatApp = document.querySelector('yt-live-chat-app') || document.createElement('yt-live-chat-app');
  1260.  
  1261.         const lcaProto = getProto(ytLiveChatApp);
  1262.  
  1263.         dummy = await new Promise(resolve => {
  1264.  
  1265.           if (typeof lcaProto.createComponent_ === 'function' && !lcaProto.createComponent99_) {
  1266.  
  1267.             lcaProto.createComponent99_ = lcaProto.createComponent_;
  1268.             lcaProto.createComponent98_ = function (a, b, c) {
  1269.               // (3) ['yt-live-chat-renderer', {…}, true]
  1270.               const r = this.createComponent99_.apply(this, arguments);
  1271.               if (a === 'yt-live-chat-renderer') {
  1272.                 resolve(r);
  1273.               }
  1274.               return r;
  1275.             };
  1276.             lcaProto.createComponent_ = lcaProto.createComponent98_;
  1277.  
  1278.           } else {
  1279.  
  1280.             mo = new MutationObserver(() => {
  1281.               const t = document.querySelector(tag);
  1282.               if (t) {
  1283.                 resolve(t);
  1284.               }
  1285.             });
  1286.             mo.observe(document, { subtree: true, childList: true })
  1287.           }
  1288.  
  1289.         });
  1290.  
  1291.         if (mo) {
  1292.           mo.disconnect();
  1293.           mo.takeRecords();
  1294.           mo = null;
  1295.         }
  1296.  
  1297.         if (lcaProto.createComponent99_ && lcaProto.createComponent_ && lcaProto.createComponent98_ === lcaProto.createComponent_) {
  1298.           lcaProto.createComponent_ = lcaProto.createComponent99_;
  1299.           lcaProto.createComponent99_ = null;
  1300.           lcaProto.createComponent98_ = null;
  1301.         }
  1302.  
  1303.       }
  1304.       return dummy;
  1305.  
  1306.     });
  1307.   }
  1308.  
  1309.   const { addCssManaged } = (() => {
  1310.  
  1311.     const addFontPreRendering = () => {
  1312.  
  1313.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  1314.  
  1315.       let efsContainer = document.createElement('elzm-fonts');
  1316.       efsContainer.id = 'elzm-fonts-yk75g'
  1317.  
  1318.       const arr = [];
  1319.       let p = document.createElement('elzm-font');
  1320.       arr.push(p);
  1321.  
  1322.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  1323.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1324.  
  1325.           p = document.createElement('elzm-font');
  1326.           p.style.fontWeight = size;
  1327.           arr.push(p);
  1328.         }
  1329.       }
  1330.  
  1331.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  1332.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1333.  
  1334.           p = document.createElement('elzm-font');
  1335.           p.style.fontFamily = 'Roboto';
  1336.           p.style.fontWeight = size;
  1337.           arr.push(p);
  1338.         }
  1339.       }
  1340.  
  1341.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  1342.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1343.  
  1344.           p = document.createElement('elzm-font');
  1345.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  1346.           p.style.fontWeight = size;
  1347.           arr.push(p);
  1348.         }
  1349.       }
  1350.  
  1351.  
  1352.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  1353.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1354.  
  1355.           p = document.createElement('elzm-font');
  1356.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  1357.           p.style.fontWeight = size;
  1358.           arr.push(p);
  1359.         }
  1360.       }
  1361.  
  1362.  
  1363.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  1364.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1365.  
  1366.           p = document.createElement('elzm-font');
  1367.           p.style.fontFamily = 'sans-serif';
  1368.           p.style.fontWeight = size;
  1369.           arr.push(p);
  1370.         }
  1371.       }
  1372.  
  1373.       console.log('number of elzm-font elements', arr.length);
  1374.  
  1375.       HTMLElement.prototype.append.apply(efsContainer, arr);
  1376.  
  1377.       (document.body || document.documentElement).appendChild(efsContainer);
  1378.  
  1379.  
  1380.       console.log('elzm-font elements have been added to the page for rendering.');
  1381.  
  1382.       console.groupEnd();
  1383.  
  1384.     }
  1385.  
  1386.     let isCssAdded = false;
  1387.  
  1388.     function addCssElement() {
  1389.       let s = document.createElement('style');
  1390.       s.id = 'ewRvC';
  1391.       return s;
  1392.     }
  1393.  
  1394.     const addCssManaged = () => {
  1395.       if (!isCssAdded && document.documentElement && document.head) {
  1396.         isCssAdded = true;
  1397.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  1398.         if (ENABLE_FONT_PRE_RENDERING) {
  1399.           Promise.resolve().then(addFontPreRendering)
  1400.         }
  1401.       }
  1402.     }
  1403.  
  1404.     return { addCssManaged };
  1405.   })();
  1406.  
  1407.  
  1408.   const { setupStyle } = (() => {
  1409.  
  1410.     const sp7 = Symbol();
  1411.  
  1412.     const proxyHelperFn = (dummy) => ({
  1413.  
  1414.       get(target, prop) {
  1415.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  1416.       },
  1417.       set(target, prop, value) {
  1418.         if (!(prop in dummy)) {
  1419.           target[prop] = value;
  1420.         }
  1421.         return true;
  1422.       },
  1423.       has(target, prop) {
  1424.         return (prop in target);
  1425.       },
  1426.       deleteProperty(target, prop) {
  1427.         return true;
  1428.       },
  1429.       ownKeys(target) {
  1430.         return Object.keys(target);
  1431.       },
  1432.       defineProperty(target, key, descriptor) {
  1433.         return Object.defineProperty(target, key, descriptor);
  1434.       },
  1435.       getOwnPropertyDescriptor(target, key) {
  1436.         return Object.getOwnPropertyDescriptor(target, key);
  1437.       },
  1438.  
  1439.     });
  1440.  
  1441.     const setupStyle = (m1, m2) => {
  1442.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  1443.  
  1444.       const dummy1v = {
  1445.         transform: '',
  1446.         height: '',
  1447.         minHeight: '',
  1448.         paddingBottom: '',
  1449.         paddingTop: ''
  1450.       };
  1451.  
  1452.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  1453.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  1454.         dummy1v[k] = dummyStyleFn(k);
  1455.       }
  1456.  
  1457.       const dummy1p = proxyHelperFn(dummy1v);
  1458.       const sp1v = new Proxy(m1.style, dummy1p);
  1459.       const sp2v = new Proxy(m2.style, dummy1p);
  1460.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  1461.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  1462.       m1.removeAttribute("style");
  1463.       m2.removeAttribute("style");
  1464.  
  1465.     }
  1466.  
  1467.     return { setupStyle };
  1468.  
  1469.   })();
  1470.  
  1471.  
  1472.  
  1473.   function setThumbnails(config) {
  1474.  
  1475.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1476.  
  1477.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1478.  
  1479.  
  1480.       if (thumbnails && thumbnails.length > 0) {
  1481.         if (flag0 > 0 && thumbnails.length > 1) {
  1482.           let pSize = 0;
  1483.           let newThumbnails = [];
  1484.           for (const thumbnail of thumbnails) {
  1485.             if (!thumbnail || !thumbnail.url) continue;
  1486.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1487.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1488.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1489.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1490.               newThumbnails.push(thumbnail);
  1491.               if (imageLinks) imageLinks.add(thumbnail.url);
  1492.             }
  1493.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1494.               pSize = thumbnail.width;
  1495.             }
  1496.           }
  1497.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1498.             baseObject.thumbnails = newThumbnails;
  1499.           } else {
  1500.             newThumbnails.length = 0;
  1501.           }
  1502.           newThumbnails = null;
  1503.         } else {
  1504.           for (const thumbnail of thumbnails) {
  1505.             if (thumbnail && thumbnail.url) {
  1506.               if (imageLinks) imageLinks.add(thumbnail.url);
  1507.             }
  1508.           }
  1509.         }
  1510.       }
  1511.  
  1512.     }
  1513.   }
  1514.  
  1515.   function fixLiveChatItem(item, imageLinks) {
  1516.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1517.     if (liveChatTextMessageRenderer) {
  1518.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1519.       if (messageRuns && messageRuns.length > 0) {
  1520.         for (const run of messageRuns) {
  1521.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1522.           setThumbnails({
  1523.             baseObject: emojiImage,
  1524.             thumbnails: emojiImage.thumbnails,
  1525.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1526.             imageLinks
  1527.           });
  1528.         }
  1529.       }
  1530.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1531.       setThumbnails({
  1532.         baseObject: authorPhoto,
  1533.         thumbnails: authorPhoto.thumbnails,
  1534.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1535.         imageLinks
  1536.       });
  1537.     }
  1538.   }
  1539.  
  1540.  
  1541.  
  1542.   let kptPF = null;
  1543.   const emojiPrefetched = new Set();
  1544.   const authorPhotoPrefetched = new Set();
  1545.  
  1546.   function linker(link, rel, href, _as) {
  1547.     return new Promise(resolve => {
  1548.       if (!link) link = document.createElement('link');
  1549.       link.rel = rel;
  1550.       if (_as) link.setAttribute('as', _as);
  1551.       link.onload = function () {
  1552.         resolve({
  1553.           link: this,
  1554.           success: true
  1555.         })
  1556.         this.remove();
  1557.       };
  1558.       link.onerror = function () {
  1559.         resolve({
  1560.           link: this,
  1561.           success: false
  1562.         });
  1563.         this.remove();
  1564.       };
  1565.       link.href = href;
  1566.       document.head.appendChild(link);
  1567.       link = null;
  1568.     });
  1569.   }
  1570.  
  1571.  
  1572.  
  1573.   const cleanContext = async (win) => {
  1574.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1575.     try {
  1576.       let mx = 16; // MAX TRIAL
  1577.       const frameId = 'vanillajs-iframe-v1';
  1578.       /** @type {HTMLIFrameElement | null} */
  1579.       let frame = document.getElementById(frameId);
  1580.       let removeIframeFn = null;
  1581.       if (!frame) {
  1582.         frame = document.createElement('iframe');
  1583.         frame.id = frameId;
  1584.         const blobURL = typeof webkitCancelAnimationFrame === 'function' ? (frame.src = URL.createObjectURL(new Blob([], { type: 'text/html' }))) : null; // avoid Brave Crash
  1585.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1586.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1587.         n.appendChild(frame);
  1588.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1589.         const root = document.documentElement;
  1590.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1591.         if (blobURL) Promise.resolve().then(() => URL.revokeObjectURL(blobURL));
  1592.  
  1593.         removeIframeFn = (setTimeout) => {
  1594.           const removeIframeOnDocumentReady = (e) => {
  1595.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1596.             e = n;
  1597.             n = win = removeIframeFn = 0;
  1598.             setTimeout ? setTimeout(() => e.remove(), 200) : e.remove();
  1599.           }
  1600.           if (!setTimeout || document.readyState !== 'loading') {
  1601.             removeIframeOnDocumentReady();
  1602.           } else {
  1603.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1604.           }
  1605.         }
  1606.       }
  1607.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1608.       const fc = frame.contentWindow;
  1609.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1610.       try {
  1611.         const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, getComputedStyle } = fc;
  1612.         const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, getComputedStyle };
  1613.         for (let k in res) res[k] = res[k].bind(win); // necessary
  1614.         if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1615.  
  1616.         /** @type {HTMLElement} */
  1617.         const HTMLElementProto = fc.HTMLElement.prototype;
  1618.         /** @type {EventTarget} */
  1619.         const EventTargetProto = fc.EventTarget.prototype;
  1620.         // jsonParseFix = {
  1621.         //   _JSON: fc.JSON, _parse: fc.JSON.parse
  1622.         // }
  1623.         return {
  1624.           ...res,
  1625.           animate: HTMLElementProto.animate,
  1626.           addEventListener: EventTargetProto.addEventListener,
  1627.           removeEventListener: EventTargetProto.removeEventListener
  1628.         };
  1629.       } catch (e) {
  1630.         if (removeIframeFn) removeIframeFn();
  1631.         return null;
  1632.       }
  1633.     } catch (e) {
  1634.       console.warn(e);
  1635.       return null;
  1636.     }
  1637.   };
  1638.  
  1639.   cleanContext(win).then(__CONTEXT__ => {
  1640.     if (!__CONTEXT__) return null;
  1641.  
  1642.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate, getComputedStyle, addEventListener, removeEventListener } = __CONTEXT__;
  1643.  
  1644.  
  1645.     let foregroundPromise = null;
  1646.     const foregroundPromiseFn = () => (foregroundPromise = (foregroundPromise || new Promise(resolve => {
  1647.       requestAnimationFrame(() => {
  1648.         foregroundPromise = null;
  1649.         resolve();
  1650.       });
  1651.     })));
  1652.  
  1653.     let playerState = null;
  1654.     let _playerState = null;
  1655.     let lastPlayerProgress = null;
  1656.     let relayCount = 0;
  1657.     let playerEventsByIframeRelay = false;
  1658.     let isPlayProgressTriggered = false;
  1659.     let waitForInitialDataCompletion = 0;
  1660.  
  1661.  
  1662.  
  1663.     let aeConstructor = null;
  1664.  
  1665.     // << __openedChanged82 >>
  1666.     let currentMenuPivotWR = null;
  1667.  
  1668.     // << if DO_PARTICIPANT_LIST_HACKS >>
  1669.     const beforeParticipantsMap = new WeakMap();
  1670.     // << end >>
  1671.  
  1672.  
  1673.  
  1674.     // << if onRegistryReadyForDOMOperations >>
  1675.  
  1676.     let dt0 = Date.now() - 2000;
  1677.     const dateNow = () => Date.now() - dt0;
  1678.     // let lastScroll = 0;
  1679.     // let lastLShow = 0;
  1680.     let lastWheel = 0;
  1681.     let lastMouseDown = 0;
  1682.     let lastMouseUp = 0;
  1683.     let currentMouseDown = false;
  1684.     let lastTouchDown = 0;
  1685.     let lastTouchUp = 0;
  1686.     let currentTouchDown = false;
  1687.     let lastUserInteraction = 0;
  1688.  
  1689.     let scrollChatFn = null;
  1690.  
  1691.     let skipDontRender = true; // true first; false by flushActiveItems_
  1692.     let allowDontRender = null;
  1693.  
  1694.     // ---- #items mutation ----
  1695.     let sk35zResolveFn = null;
  1696.     let firstList = true;
  1697.  
  1698.     // << end >>
  1699.  
  1700.     class RAFHub {
  1701.       constructor() {
  1702.         /** @type {number} */
  1703.         this.startAt = 8170;
  1704.         /** @type {number} */
  1705.         this.counter = 0;
  1706.         /** @type {number} */
  1707.         this.rid = 0;
  1708.         /** @type {Map<number, FrameRequestCallback>} */
  1709.         this.funcs = new Map();
  1710.         const funcs = this.funcs;
  1711.         /** @type {FrameRequestCallback} */
  1712.         this.bCallback = this.mCallback.bind(this);
  1713.         this.pClear = () => funcs.clear();
  1714.         this.keepRAF = false;
  1715.       }
  1716.       /** @param {DOMHighResTimeStamp} highResTime */
  1717.       mCallback(highResTime) {
  1718.         this.rid = 0;
  1719.         Promise.resolve().then(this.pClear);
  1720.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  1721.       }
  1722.       /** @param {FrameRequestCallback} f */
  1723.       request(f) {
  1724.         if (this.counter > 1e9) this.counter = 9;
  1725.         let cid = this.startAt + (++this.counter);
  1726.         this.funcs.set(cid, f);
  1727.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  1728.         return cid;
  1729.       }
  1730.       /** @param {number} cid */
  1731.       cancel(cid) {
  1732.         cid = +cid;
  1733.         if (cid > 0) {
  1734.           if (cid <= this.startAt) {
  1735.             return cancelAnimationFrame(cid);
  1736.           }
  1737.           if (this.rid > 0) {
  1738.             this.funcs.delete(cid);
  1739.             if (this.funcs.size === 0 && !this.keepRAF) {
  1740.               cancelAnimationFrame(this.rid);
  1741.               this.rid = 0;
  1742.             }
  1743.           }
  1744.         }
  1745.       }
  1746.     }
  1747.  
  1748.     function basePrefetching() {
  1749.  
  1750.       new Promise(resolve => {
  1751.  
  1752.         if (document.readyState !== 'loading') {
  1753.           resolve();
  1754.         } else {
  1755.           win.addEventListener("DOMContentLoaded", resolve, false);
  1756.         }
  1757.  
  1758.       }).then(() => {
  1759.         const hostL1 = [
  1760.           'https://www.youtube.com', 'https://googlevideo.com',
  1761.           'https://googleapis.com', 'https://accounts.youtube.com',
  1762.           'https://www.gstatic.com', 'https://ggpht.com',
  1763.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1764.         ];
  1765.  
  1766.         const hostL2 = [
  1767.           'https://youtube.com',
  1768.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1769.         ];
  1770.  
  1771.         let link = null;
  1772.  
  1773.         function kn() {
  1774.  
  1775.           link = document.createElement('link');
  1776.           if (link.relList && link.relList.supports) {
  1777.             kptPF = (link.relList.supports('dns-prefetch') ? 1 : 0) + (link.relList.supports('preconnect') ? 2 : 0) + (link.relList.supports('prefetch') ? 4 : 0) + (link.relList.supports('subresource') ? 8 : 0) + (link.relList.supports('preload') ? 16 : 0)
  1778.           } else {
  1779.             kptPF = 0;
  1780.           }
  1781.  
  1782.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1783.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1784.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1785.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1786.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1787.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1788.           console.groupEnd();
  1789.  
  1790.         }
  1791.  
  1792.         for (const h of hostL1) {
  1793.  
  1794.           if (kptPF === null) kn();
  1795.           if (ENABLE_BASE_PREFETCHING) {
  1796.             // if (kptPF & 1) {
  1797.             //   linker(link, 'dns-prefetch', h);
  1798.             //   link = null;
  1799.             // }
  1800.             if (kptPF & 2) {
  1801.               linker(link, 'preconnect', h);
  1802.               link = null;
  1803.             }
  1804.           }
  1805.         }
  1806.  
  1807.         for (const h of hostL2) {
  1808.           if (kptPF === null) kn();
  1809.           if (ENABLE_BASE_PREFETCHING) {
  1810.             if (kptPF & 1) {
  1811.               linker(link, 'dns-prefetch', h);
  1812.               link = null;
  1813.             }
  1814.           }
  1815.         }
  1816.  
  1817.       })
  1818.  
  1819.  
  1820.     }
  1821.  
  1822.     if (DO_LINK_PREFETCH) basePrefetching();
  1823.  
  1824.     const { notifyPath7081 } = (() => {
  1825.       // DO_PARTICIPANT_LIST_HACKS
  1826.  
  1827.       const mutexParticipants = new Mutex();
  1828.  
  1829.       let uvid = 0;
  1830.       let r95dm = 0;
  1831.       let c95dm = -1;
  1832.  
  1833.       const foundMap = (base, content) => {
  1834.         /*
  1835.           let lastSearch = 0;
  1836.           let founds = base.map(baseEntry => {
  1837.             let search = content.indexOf(baseEntry, lastSearch);
  1838.             if (search < 0) return false;
  1839.             lastSearch = search + 1;
  1840.             return true;
  1841.           });
  1842.           return founds;
  1843.         */
  1844.         const contentSet = new Set(content);
  1845.         return base.map(baseEntry => contentSet.has(baseEntry));
  1846.  
  1847.       }
  1848.  
  1849.  
  1850.  
  1851.       const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1852.  
  1853.         const handler1 = {
  1854.           get(target, prop, receiver) {
  1855.             if (prop === 'object') {
  1856.               return participants; // avoid memory leakage
  1857.             }
  1858.             if (prop === 'type') {
  1859.               return 'splice';
  1860.             }
  1861.             return target[prop];
  1862.           }
  1863.         };
  1864.         const releaser = () => {
  1865.           participants = null;
  1866.         }
  1867.  
  1868.         let foundsForAfter = foundMap(idsAfter, idsBefore);
  1869.         let foundsForBefore = foundMap(idsBefore, idsAfter);
  1870.  
  1871.         let indexSplices = [];
  1872.         let contentUpdates = [];
  1873.         for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1874.           if (beforeParticipants[i] === participants[j]) {
  1875.             i++; j++;
  1876.           } else if (idsBefore[i] === idsAfter[j]) {
  1877.             // content changed
  1878.             contentUpdates.push({ indexI: i, indexJ: j })
  1879.             i++; j++;
  1880.           } else {
  1881.             let addedCount = 0;
  1882.             for (let q = j; q < foundsForAfter.length; q++) {
  1883.               if (foundsForAfter[q] === false) addedCount++;
  1884.               else break;
  1885.             }
  1886.             let removedCount = 0;
  1887.             for (let q = i; q < foundsForBefore.length; q++) {
  1888.               if (foundsForBefore[q] === false) removedCount++;
  1889.               else break;
  1890.             }
  1891.             if (!addedCount && !removedCount) {
  1892.               throw 'ERROR(0xFF32): spliceIndicesFunc';
  1893.             }
  1894.             indexSplices.push(new Proxy({
  1895.               index: j,
  1896.               addedCount: addedCount,
  1897.               removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1898.             }, handler1));
  1899.             i += removedCount;
  1900.             j += addedCount;
  1901.           }
  1902.         }
  1903.         foundsForBefore = null;
  1904.         foundsForAfter = null;
  1905.         idsBefore = null;
  1906.         idsAfter = null;
  1907.         beforeParticipants = null;
  1908.         return { indexSplices, contentUpdates, releaser };
  1909.  
  1910.       }
  1911.  
  1912.       /*
  1913.  
  1914.       customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1915.  
  1916.       VM63631:1 Error
  1917.       at customElements.get.notifyPath (<anonymous>:1:122)
  1918.       at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1919.       at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1920.       at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1921.       at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1922.       at ju (live_chat_polymer.js:1674:217)
  1923.       at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1924.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1925.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1926.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1927.  
  1928.       */
  1929.  
  1930.       function convertToIds(participants) {
  1931.         return participants.map(participant => {
  1932.           if (!participant || typeof participant !== 'object') {
  1933.             console.warn('Error(0xFA41): convertToIds', participant);
  1934.             return participant; // just in case
  1935.           }
  1936.           let keys = Object.keys(participant);
  1937.           // liveChatTextMessageRenderer
  1938.           // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1939.           // liveChatPaidMessageRenderer
  1940.           /*
  1941.  
  1942.             'yt-live-chat-participant-renderer' utilizes the following:
  1943.             authorName.simpleText: string
  1944.             authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1945.             authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1946.             authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1947.             authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1948.  
  1949.           */
  1950.           if (keys.length !== 1) {
  1951.             console.warn('Error(0xFA42): convertToIds', participant);
  1952.             return participant; // just in case
  1953.           }
  1954.           let key = keys[0];
  1955.           let renderer = (participant[key] || 0);
  1956.           let authorName = (renderer.authorName || 0);
  1957.           let text = `${authorName.simpleText || authorName.text}`
  1958.           let res = participant; // fallback if it is not a vaild entry
  1959.           if (typeof text !== 'string') {
  1960.             console.warn('Error(0xFA53): convertToIds', participant);
  1961.           } else {
  1962.             text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1963.             if (text.length > 1) res = text;
  1964.           }
  1965.           return res;
  1966.           // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1967.           // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1968.         });
  1969.       }
  1970.  
  1971.       const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1972.         // just update when content is changed.
  1973.         if (p1.authorName !== p2.authorName) return true;
  1974.         if (p1.authorPhoto !== p2.authorPhoto) return true;
  1975.         if (p1.authorBadges !== p2.authorBadges) return true;
  1976.         return false;
  1977.       } : (p1, p2) => {
  1978.         // keep integrity all the time.
  1979.         return p1 !== p2; // always true
  1980.       }
  1981.  
  1982.       function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1983.  
  1984.         if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1985.           if (path !== "participantsManager.participants") {
  1986.             return this.__notifyPath5036__.apply(this, arguments);
  1987.           }
  1988.           if (c95dm === r95dm) return;
  1989.         } else {
  1990.           const stack = new Error().stack;
  1991.           if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1992.             return this.__notifyPath5036__.apply(this, arguments);
  1993.           }
  1994.         }
  1995.  
  1996.         if (uvid > 1e8) uvid = uvid % 100;
  1997.         let tid = ++uvid;
  1998.  
  1999.         const cnt = this; // "yt-live-chat-participant-list-renderer"
  2000.         mutexParticipants.lockWith(lockResolve => {
  2001.  
  2002.           const participants00 = cnt.participantsManager.participants;
  2003.  
  2004.           if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  2005.             lockResolve();
  2006.             return;
  2007.           }
  2008.  
  2009.           let doUpdate = false;
  2010.  
  2011.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  2012.  
  2013.             if (!participants00.r94dm) {
  2014.               participants00.r94dm = 1;
  2015.               if (++r95dm > 1e9) r95dm = 9;
  2016.               participants00.push = function () {
  2017.                 if (++r95dm > 1e9) r95dm = 9;
  2018.                 return Array.prototype.push.apply(this, arguments);
  2019.               }
  2020.               participants00.pop = function () {
  2021.                 if (++r95dm > 1e9) r95dm = 9;
  2022.                 return Array.prototype.pop.apply(this, arguments);
  2023.               }
  2024.               participants00.shift = function () {
  2025.                 if (++r95dm > 1e9) r95dm = 9;
  2026.                 return Array.prototype.shift.apply(this, arguments);
  2027.               }
  2028.               participants00.unshift = function () {
  2029.                 if (++r95dm > 1e9) r95dm = 9;
  2030.                 return Array.prototype.unshift.apply(this, arguments);
  2031.               }
  2032.               participants00.splice = function () {
  2033.                 if (++r95dm > 1e9) r95dm = 9;
  2034.                 return Array.prototype.splice.apply(this, arguments);
  2035.               }
  2036.               participants00.sort = function () {
  2037.                 if (++r95dm > 1e9) r95dm = 9;
  2038.                 return Array.prototype.sort.apply(this, arguments);
  2039.               }
  2040.               participants00.reverse = function () {
  2041.                 if (++r95dm > 1e9) r95dm = 9;
  2042.                 return Array.prototype.reverse.apply(this, arguments);
  2043.               }
  2044.             }
  2045.  
  2046.             if (c95dm !== r95dm) {
  2047.               c95dm = r95dm;
  2048.               doUpdate = true;
  2049.             }
  2050.  
  2051.           } else {
  2052.             doUpdate = true;
  2053.           }
  2054.  
  2055.           if (!doUpdate) {
  2056.             lockResolve();
  2057.             return;
  2058.           }
  2059.  
  2060.           const participants = participants00.slice(0);
  2061.           const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  2062.           beforeParticipantsMap.set(cnt, participants);
  2063.  
  2064.           const resPromise = (async () => {
  2065.  
  2066.             if (beforeParticipants.length === 0) {
  2067.               // not error
  2068.               return 0;
  2069.             }
  2070.  
  2071.             let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  2072.  
  2073.             // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  2074.             if (beforeParticipants.length !== countOfElements) {
  2075.               // there is somewrong for the cache. - sometimes happen
  2076.               return 0;
  2077.             }
  2078.  
  2079.             const idsBefore = convertToIds(beforeParticipants);
  2080.             const idsAfter = convertToIds(participants);
  2081.  
  2082.             let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  2083.  
  2084.             let res = 1; // default 1 for no update
  2085.  
  2086.             if (indexSplices.length >= 1) {
  2087.  
  2088.  
  2089.               // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  2090.               // let p1 = indexSplices[0].removed;
  2091.               // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  2092.  
  2093.               /* folllow
  2094.                   a.notifyPath(c + ".splices", d);
  2095.                   a.notifyPath(c + ".length", b.length);
  2096.               */
  2097.               // stampDomArraySplices_
  2098.  
  2099.  
  2100.               await new Promise(resolve => {
  2101.                 cnt.resolveForDOMRendering781 = resolve;
  2102.  
  2103.                 cnt.__notifyPath5036__("participantsManager.participants.splices", {
  2104.                   indexSplices
  2105.                 });
  2106.                 indexSplices = null;
  2107.                 releaser();
  2108.                 releaser = null;
  2109.                 cnt.__notifyPath5036__("participantsManager.participants.length",
  2110.                   participants.length
  2111.                 );
  2112.  
  2113.               });
  2114.  
  2115.               await Promise.resolve(0); // play safe for the change of 'length'
  2116.               countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  2117.  
  2118.               let wrongSize = participants.length !== countOfElements
  2119.               if (wrongSize) {
  2120.                 console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  2121.                 return 0;
  2122.               }
  2123.  
  2124.               res = 2 | 4;
  2125.  
  2126.             } else {
  2127.  
  2128.               indexSplices = null;
  2129.               releaser();
  2130.               releaser = null;
  2131.  
  2132.               if (participants.length !== countOfElements) {
  2133.                 // other unhandled cases
  2134.                 return 0;
  2135.               }
  2136.  
  2137.             }
  2138.  
  2139.             // participants.length === countOfElements before contentUpdates
  2140.             if (contentUpdates.length >= 1) {
  2141.               for (const contentUpdate of contentUpdates) {
  2142.                 let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  2143.                 if (isChanged) {
  2144.                   cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  2145.                   res |= 4 | 8;
  2146.                 }
  2147.               }
  2148.             }
  2149.             contentUpdates = null;
  2150.  
  2151.             return res;
  2152.  
  2153.  
  2154.           })();
  2155.  
  2156.  
  2157.           resPromise.then(resValue => {
  2158.  
  2159.             const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  2160.             isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  2161.             if (resValue === 0) {
  2162.               new Promise(resolve => {
  2163.                 cnt.resolveForDOMRendering781 = resolve;
  2164.                 isLogRequired && console.log("Full Refresh begins");
  2165.                 cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  2166.               }).then(() => {
  2167.                 isLogRequired && console.log("Full Refresh ends");
  2168.                 console.groupEnd();
  2169.               }).then(lockResolve);
  2170.               return;
  2171.             }
  2172.  
  2173.             const delayLockResolve = (resValue & 4) === 4;
  2174.  
  2175.             if (delayLockResolve) {
  2176.               isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  2177.               isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  2178.               isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  2179.               isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  2180.               isLogRequired && console.groupEnd();
  2181.               // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  2182.               // mutex lock with requestAnimationFrame can also disable participants update in background
  2183.               requestAnimationFrame(lockResolve);
  2184.             } else {
  2185.               lockResolve();
  2186.             }
  2187.  
  2188.           });
  2189.  
  2190.         });
  2191.  
  2192.       }
  2193.  
  2194.       return { notifyPath7081 };
  2195.  
  2196.     })();
  2197.  
  2198.     const whenDefinedMultiple = async (tags) => {
  2199.  
  2200.       const sTags = [...new Set(tags)];
  2201.       const len = sTags.length;
  2202.  
  2203.       const pTags = new Array(len);
  2204.       for (let i = 0; i < len; i++) {
  2205.         pTags[i] = customElements.whenDefined(sTags[i]);
  2206.       }
  2207.  
  2208.       await Promise.all(pTags);
  2209.       pTags.length = 0;
  2210.  
  2211.       return sTags;
  2212.  
  2213.     }
  2214.  
  2215.     const onRegistryReadyForDataManipulation = () => {
  2216.  
  2217.       function dummy5035(a, b, c) { }
  2218.       function dummy411(a, b, c) { }
  2219.  
  2220.  
  2221.  
  2222.       customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  2223.  
  2224.         if (!DO_PARTICIPANT_LIST_HACKS) return;
  2225.  
  2226.         const tag = "yt-live-chat-participant-list-renderer";
  2227.         const cProto = getProto(document.createElement(tag));
  2228.         if (!cProto || typeof cProto.attached !== 'function') {
  2229.           // for _registered, proto.attached shall exist when the element is defined.
  2230.           // for controller extraction, attached shall exist when instance creates.
  2231.           console.warn(`proto.attached for ${tag} is unavailable.`);
  2232.           return;
  2233.         }
  2234.  
  2235.  
  2236.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  2237.  
  2238.         const fgsArr = ['kevlar_tuner_should_test_maintain_stable_list', 'kevlar_should_maintain_stable_list', 'kevlar_tuner_should_test_reuse_components', 'kevlar_tuner_should_reuse_components'];
  2239.         const fgs = {};
  2240.         for (const key of fgsArr) fgs[key] = undefined;
  2241.  
  2242.         try {
  2243.           const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  2244.           for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  2245.         } catch (e) { }
  2246.         console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  2247.  
  2248.         const canDoReplacement = (() => {
  2249.           if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  2250.             console.warn('YouTube Live Chat Tamer is running.');
  2251.             return;
  2252.           }
  2253.  
  2254.           if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  2255.             console.warn('YouTube Live Chat Tamer is running.');
  2256.             return;
  2257.           }
  2258.  
  2259.           cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  2260.           cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  2261.  
  2262.           if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  2263.             console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  2264.             return;
  2265.           }
  2266.  
  2267.           if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  2268.             console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  2269.             return;
  2270.           }
  2271.  
  2272.           if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  2273.             console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  2274.             return;
  2275.           }
  2276.           return true;
  2277.         })();
  2278.  
  2279.         console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  2280.  
  2281.         assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  2282.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2283.           const fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  2284.           const s = fiRSCB.split('.');
  2285.           if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  2286.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - OK`);
  2287.           } else {
  2288.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - NG`);
  2289.           }
  2290.         } else {
  2291.           console.log("flushRenderStamperComponentBindings_ - not found");
  2292.         }
  2293.         // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  2294.  
  2295.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2296.           cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  2297.           cProto.flushRenderStamperComponentBindings_ = function () {
  2298.             // console.log('flushRenderStamperComponentBindings_')
  2299.             this.flushRenderStamperComponentBindings66_();
  2300.             if (this.resolveForDOMRendering781) {
  2301.               this.resolveForDOMRendering781();
  2302.               this.resolveForDOMRendering781 = null;
  2303.             }
  2304.           };
  2305.         }
  2306.  
  2307.         cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  2308.           const container = ((this || 0).$ || 0).participants;
  2309.           if (!container) return 0;
  2310.           return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  2311.         }
  2312.  
  2313.         const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  2314.  
  2315.         cProto.__attached412__ = cProto.attached;
  2316.         const fpPList = function (hostElement) {
  2317.           const cnt = insp(hostElement);
  2318.           if (beforeParticipantsMap.has(cnt)) return;
  2319.           hostElement.classList.add('n9fJ3');
  2320.  
  2321.           assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  2322.           if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  2323.             console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  2324.             return;
  2325.           }
  2326.  
  2327.           groupCollapsed("Participant List attached", "");
  2328.           // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  2329.           //   console.log(123, 'appendChild');
  2330.           //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  2331.           // }
  2332.  
  2333.           // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  2334.           //   console.log(123, 'insertBefore');
  2335.           //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  2336.           // }
  2337.  
  2338.           cnt.__notifyPath5036__ = cnt.notifyPath
  2339.           const participants = ((cnt.participantsManager || 0).participants || 0);
  2340.           assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  2341.           console.log(`initial number of participants: ${participants.length}`);
  2342.           const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  2343.           beforeParticipantsMap.set(cnt, newParticipants);
  2344.           cnt.notifyPath = notifyPath7081;
  2345.           console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  2346.           console.groupEnd();
  2347.         }
  2348.         cProto.attached = function () {
  2349.           fpPList(this.hostElement || this);
  2350.           this.__attached412__.apply(this, arguments);
  2351.         };
  2352.  
  2353.  
  2354.         if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  2355.  
  2356.           /** @type {boolean | (()=>boolean)} */
  2357.           let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  2358.           if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  2359.  
  2360.             let lastMessageDate = 0;
  2361.             cProto.stampDomArray66_ = cProto.stampDomArray_;
  2362.  
  2363.             cProto.stampDomArray_ = function (...args) {
  2364.               if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  2365.                 if (typeof toUseMaintainStableList === 'function') {
  2366.                   toUseMaintainStableList = toUseMaintainStableList();
  2367.                 }
  2368.                 args[5] = toUseMaintainStableList;
  2369.                 let currentDate = Date.now();
  2370.                 if (currentDate - lastMessageDate > 440) {
  2371.                   lastMessageDate = currentDate;
  2372.                   console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  2373.                 }
  2374.               }
  2375.               return this.stampDomArray66_.apply(this, args);
  2376.             }
  2377.  
  2378.             cProto.stampDomArray_.nIegT = 1;
  2379.  
  2380.           }
  2381.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  2382.         } else {
  2383.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  2384.         }
  2385.  
  2386.         console.groupEnd();
  2387.  
  2388.         if (onPageElements.length >= 1) {
  2389.           for (const s of onPageElements) {
  2390.             if (insp(s).isAttached === true) {
  2391.               fpPList(s);
  2392.             }
  2393.           }
  2394.         }
  2395.  
  2396.       }).catch(console.warn);
  2397.  
  2398.     };
  2399.  
  2400.     if (DO_PARTICIPANT_LIST_HACKS) {
  2401.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2402.     }
  2403.  
  2404.  
  2405.  
  2406.     const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2407.  
  2408.  
  2409.  
  2410.  
  2411.     const bnForDelayChatOccurrence = () => {
  2412.  
  2413.       document.addEventListener('animationstart', (evt) => {
  2414.  
  2415.         if (evt.animationName === 'dontRenderAnimation') {
  2416.           evt.target.classList.remove('dont-render');
  2417.           if (scrollChatFn) scrollChatFn();
  2418.         }
  2419.  
  2420.       }, true);
  2421.  
  2422.       const f = (elm) => {
  2423.         if (elm && elm.nodeType === 1) {
  2424.           if (!skipDontRender && allowDontRender === true) {
  2425.             // innerTextFixFn();
  2426.             elm.classList.add('dont-render');
  2427.           }
  2428.         }
  2429.       }
  2430.  
  2431.       Node.prototype.__appendChild931__ = function (a) {
  2432.         a = dr(a);
  2433.         if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2434.           if (a && a.nodeType === 1) f(a);
  2435.           else if (a instanceof DocumentFragment) {
  2436.             for (let n = a.firstChild; n; n = n.nextSibling) {
  2437.               f(n);
  2438.             }
  2439.           }
  2440.         }
  2441.       }
  2442.  
  2443.       Node.prototype.__appendChild932__ = function () {
  2444.         this.__appendChild931__.apply(this, arguments);
  2445.         return Node.prototype.appendChild.apply(this, arguments);
  2446.       }
  2447.  
  2448.  
  2449.     };
  2450.  
  2451.     const watchUserCSS = () => {
  2452.  
  2453.       // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2454.  
  2455.       const getElemFromWR = (nr) => {
  2456.         const n = kRef(nr);
  2457.         if (n && n.isConnected) return n;
  2458.         return null;
  2459.       }
  2460.  
  2461.       const clearContentVisibilitySizing = () => {
  2462.         Promise.resolve().then(() => {
  2463.  
  2464.           const e = document.querySelector('#show-more[disabled]');
  2465.           let btnShowMoreWR = e ? mWeakRef(e) : null;
  2466.  
  2467.           let lastVisibleItemWR = null;
  2468.           for (const elm of document.querySelectorAll('[wSr93]')) {
  2469.             if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2470.             elm.setAttribute('wSr93', '');
  2471.             // custom CSS property --wsr94 not working when attribute wSr93 removed
  2472.           }
  2473.           requestAnimationFrame(() => {
  2474.             const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2475.             if (btnShowMore) btnShowMore.click();
  2476.             else {
  2477.               // would not work if switch it frequently
  2478.               const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2479.               if (lastVisibleItem) {
  2480.  
  2481.                 Promise.resolve()
  2482.                   .then(() => lastVisibleItem.scrollIntoView())
  2483.                   .then(() => lastVisibleItem.scrollIntoView(false))
  2484.                   .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2485.                   .catch(e => { }) // break the chain when method not callable
  2486.  
  2487.               }
  2488.             }
  2489.           });
  2490.  
  2491.         });
  2492.  
  2493.       }
  2494.  
  2495.       const mutObserver = new MutationObserver((mutations) => {
  2496.         for (const mutation of mutations) {
  2497.           if ((mutation.addedNodes || 0).length >= 1) {
  2498.             for (const addedNode of mutation.addedNodes) {
  2499.               if (addedNode.nodeName === 'STYLE') {
  2500.                 clearContentVisibilitySizing();
  2501.                 return;
  2502.               }
  2503.             }
  2504.           }
  2505.           if ((mutation.removedNodes || 0).length >= 1) {
  2506.             for (const removedNode of mutation.removedNodes) {
  2507.               if (removedNode.nodeName === 'STYLE') {
  2508.                 clearContentVisibilitySizing();
  2509.                 return;
  2510.               }
  2511.             }
  2512.           }
  2513.         }
  2514.       });
  2515.  
  2516.       mutObserver.observe(document.documentElement, {
  2517.         childList: true,
  2518.         subtree: false
  2519.       });
  2520.       mutObserver.observe(document.head, {
  2521.         childList: true,
  2522.         subtree: false
  2523.       });
  2524.       mutObserver.observe(document.body, {
  2525.         childList: true,
  2526.         subtree: false
  2527.       });
  2528.  
  2529.     }
  2530.  
  2531.  
  2532.     class WillChangeController {
  2533.       constructor(itemScroller, willChangeValue) {
  2534.         this.element = itemScroller;
  2535.         this.counter = 0;
  2536.         this.active = false;
  2537.         this.willChangeValue = willChangeValue;
  2538.       }
  2539.  
  2540.       beforeOper() {
  2541.         if (!this.active) {
  2542.           this.active = true;
  2543.           this.element.style.willChange = this.willChangeValue;
  2544.         }
  2545.         this.counter++;
  2546.       }
  2547.  
  2548.       afterOper() {
  2549.         const c = this.counter;
  2550.         requestAnimationFrame(() => {
  2551.           if (c === this.counter) {
  2552.             this.active = false;
  2553.             this.element.style.willChange = '';
  2554.           }
  2555.         });
  2556.       }
  2557.  
  2558.       release() {
  2559.         const element = this.element;
  2560.         this.element = null;
  2561.         this.counter = 1e16;
  2562.         this.active = false;
  2563.         try {
  2564.           element.style.willChange = '';
  2565.         } catch (e) { }
  2566.       }
  2567.  
  2568.     }
  2569.  
  2570.  
  2571.     const skzData = (skz) => skz.data = {
  2572.       "message": {
  2573.         "runs": [
  2574.           {
  2575.             "text": "em2o"
  2576.           },
  2577.           {
  2578.             "emoji": {
  2579.               "emojiId": "cm35z",
  2580.               "shortcuts": [
  2581.                 ":_s:",
  2582.                 ":s:"
  2583.               ],
  2584.               "searchTerms": [
  2585.                 "_s",
  2586.                 "s"
  2587.               ],
  2588.               "image": {
  2589.                 "thumbnails": [
  2590.                   {
  2591.                     "url": dummyImgURL,
  2592.                     "width": 48,
  2593.                     "height": 48
  2594.                   }
  2595.                 ],
  2596.                 "accessibility": {
  2597.                   "accessibilityData": {
  2598.                     "label": "s"
  2599.                   }
  2600.                 }
  2601.               },
  2602.               "isCustomEmoji": true
  2603.             }
  2604.           },
  2605.           {
  2606.             "text": "ji"
  2607.           }
  2608.         ]
  2609.       },
  2610.       "authorName": {
  2611.         "simpleText": "N"
  2612.       },
  2613.       "authorPhoto": {
  2614.         "thumbnails": [
  2615.           {
  2616.             "url": dummyImgURL,
  2617.             "width": 64,
  2618.             "height": 64
  2619.           }
  2620.         ]
  2621.       },
  2622.       "contextMenuEndpoint": {
  2623.         "commandMetadata": {
  2624.           "webCommandMetadata": {
  2625.             "ignoreNavigation": true
  2626.           }
  2627.         },
  2628.         "liveChatItemContextMenuEndpoint": {
  2629.           "params": "123=="
  2630.         }
  2631.       },
  2632.       "id": "sk35z",
  2633.       "timestampUsec": "1232302352350000",
  2634.       "authorBadges": [
  2635.         {
  2636.           "liveChatAuthorBadgeRenderer": {
  2637.             "customThumbnail": {
  2638.               "thumbnails": [
  2639.                 {
  2640.                   "url": dummyImgURL,
  2641.                   "width": 16,
  2642.                   "height": 16
  2643.                 },
  2644.                 {
  2645.                   "url": dummyImgURL,
  2646.                   "width": 32,
  2647.                   "height": 32
  2648.                 }
  2649.               ]
  2650.             },
  2651.             "tooltip": "T",
  2652.             "accessibility": {
  2653.               "accessibilityData": {
  2654.                 "label": "E"
  2655.               }
  2656.             }
  2657.           }
  2658.         }
  2659.       ],
  2660.       "authorExternalChannelId": "A",
  2661.       "contextMenuAccessibility": {
  2662.         "accessibilityData": {
  2663.           "label": "E"
  2664.         }
  2665.       },
  2666.       "timestampText": {
  2667.         "simpleText": "0:43"
  2668.       }
  2669.     };
  2670.  
  2671.  
  2672.  
  2673.     const { lcRendererElm, visObserver } = (() => {
  2674.  
  2675.  
  2676.  
  2677.       let lcRendererWR = null;
  2678.  
  2679.       const lcRendererElm = () => {
  2680.         let lcRenderer = kRef(lcRendererWR);
  2681.         if (!lcRenderer || !lcRenderer.isConnected) {
  2682.           lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2683.           lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2684.         }
  2685.         return lcRenderer;
  2686.       };
  2687.  
  2688.  
  2689.       let hasFirstShowMore = false;
  2690.  
  2691.       const visObserverFn = (entry) => {
  2692.  
  2693.         const target = entry.target;
  2694.         if (!target) return;
  2695.         // if(target.classList.contains('dont-render')) return;
  2696.         let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2697.         // const h = entry.boundingClientRect.height;
  2698.         /*
  2699.         if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2700.             // e.g. under fullscreen. the element created but not rendered.
  2701.             target.setAttribute('wSr93', '');
  2702.             return;
  2703.         }
  2704.         */
  2705.         if (isVisible) {
  2706.           // target.style.setProperty('--wsr94', h + 'px');
  2707.           target.setAttribute('wSr93', 'visible');
  2708.           if (nNextElem(target) === null) {
  2709.  
  2710.             // firstVisibleItemDetected = true;
  2711.             /*
  2712.               if (dateNow() - lastScroll < 80) {
  2713.                   lastLShow = 0;
  2714.                   lastScroll = 0;
  2715.                   Promise.resolve().then(clickShowMore);
  2716.               } else {
  2717.                   lastLShow = dateNow();
  2718.               }
  2719.               */
  2720.             // lastLShow = dateNow();
  2721.           } else if (!hasFirstShowMore) { // should more than one item being visible
  2722.             // implement inside visObserver to ensure there is sufficient delay
  2723.             hasFirstShowMore = true;
  2724.             requestAnimationFrame(() => {
  2725.               // foreground page
  2726.               // page visibly ready -> load the latest comments at initial loading
  2727.               const lcRenderer = lcRendererElm();
  2728.               if (lcRenderer) {
  2729.                 insp(lcRenderer).scrollToBottom_();
  2730.               }
  2731.             });
  2732.           }
  2733.         }
  2734.         else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2735.  
  2736.           // target.style.setProperty('--wsr94', h + 'px');
  2737.           target.setAttribute('wSr93', 'hidden');
  2738.         } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2739.  
  2740.       }
  2741.  
  2742.  
  2743.  
  2744.       const visObserver = new IntersectionObserver((entries) => {
  2745.  
  2746.         for (const entry of entries) {
  2747.  
  2748.           Promise.resolve(entry).then(visObserverFn);
  2749.  
  2750.         }
  2751.  
  2752.       }, {
  2753.         // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2754.         rootMargin: "0px",
  2755.         threshold: [0.05, 0.95],
  2756.       });
  2757.  
  2758.  
  2759.       return { lcRendererElm, visObserver }
  2760.  
  2761.  
  2762.     })();
  2763.  
  2764.     const { setupMutObserver } = (() => {
  2765.  
  2766.       const mutFn = (items) => {
  2767.         for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2768.           if (node.hasAttribute('wSr93')) break;
  2769.           node.setAttribute('wSr93', '');
  2770.           visObserver.observe(node);
  2771.         }
  2772.       }
  2773.  
  2774.       const mutObserver = new MutationObserver((mutations) => {
  2775.         const items = (mutations[0] || 0).target;
  2776.         if (!items) return;
  2777.         if (sk35zResolveFn) {
  2778.           sk35zResolveFn();
  2779.           sk35zResolveFn = null;
  2780.         }
  2781.         mutFn(items);
  2782.       });
  2783.  
  2784.       const setupMutObserver = (m2) => {
  2785.         scrollChatFn = null;
  2786.         mutObserver.disconnect();
  2787.         mutObserver.takeRecords();
  2788.         if (m2) {
  2789.           ENABLE_DELAYED_CHAT_OCCURRENCE && bnForDelayChatOccurrence();
  2790.           if (typeof m2.__appendChild932__ === 'function') {
  2791.             if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2792.             if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2793.           }
  2794.           mutObserver.observe(m2, {
  2795.             childList: true,
  2796.             subtree: false
  2797.           });
  2798.           mutFn(m2);
  2799.  
  2800.           const isFirstList = firstList;
  2801.           firstList = false;
  2802.  
  2803.           if (ENABLE_OVERFLOW_ANCHOR) {
  2804.  
  2805.             let items = m2;
  2806.             let addedAnchor = false;
  2807.             if (items) {
  2808.               if (items.nextElementSibling === null) {
  2809.                 items.classList.add('no-anchor');
  2810.                 addedAnchor = true;
  2811.                 items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2812.               }
  2813.             }
  2814.  
  2815.  
  2816.  
  2817.             if (addedAnchor) {
  2818.               nodeParent(m2).classList.add('no-anchor'); // required
  2819.             }
  2820.  
  2821.           }
  2822.  
  2823.           // let div = document.createElement('div');
  2824.           // div.id = 'qwcc';
  2825.           // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2826.           // bufferRegion =div;
  2827.  
  2828.           // buffObserver.takeRecords();
  2829.           // buffObserver.disconnect();
  2830.           // buffObserver.observe(div,  {
  2831.           //     childList: true,
  2832.           //     subtree: false
  2833.           // })
  2834.  
  2835.           if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2836.  
  2837.             promiseForCustomYtElementsReady.then(() => {
  2838.  
  2839.               customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2840.  
  2841.  
  2842.  
  2843.  
  2844.                 setTimeout(() => {
  2845.  
  2846.                   /** @type {HTMLTemplateElement} */
  2847.                   let skz = document.createElement('yt-live-chat-text-message-renderer');
  2848.  
  2849.                   let cz1 = null;
  2850.  
  2851.                   if (skz && 'data' in skz && 'attached' in skz) {
  2852.  
  2853.                     const deferredZy1 = new Promise(resolve => {
  2854.  
  2855.                       skz.attached = function () {
  2856.                         cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2857.                         resolve(skz.textContent);
  2858.                       }
  2859.                       skz.detached = function () {
  2860.  
  2861.                       }
  2862.  
  2863.                     });
  2864.                     skz.id = 'sk35z';
  2865.                     skzData(skz);
  2866.  
  2867.  
  2868.                     sk35zResolveFn = null;
  2869.                     const deferredMutation = new Promise(resolve => {
  2870.                       sk35zResolveFn = resolve;
  2871.                       HTMLElement.prototype.appendChild.call(m2, skz);
  2872.                     });
  2873.  
  2874.                     Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2875.                       const [zy1, _] = res;
  2876.                       function fn() {
  2877.                         const zy2 = skz.textContent;
  2878.                         const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2879.                         if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2880.                           allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2881.                         }
  2882.                         if (allowDontRender === false) {
  2883.  
  2884.                           console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2885.                             "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2886.                             "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2887.                           );
  2888.  
  2889.                           console.warn(`%cWarning:\n\tYou might have added a userscript or extension that stops YouTube Super Fast Chat's quick loading.\n\tTo figure out which one affects the script, turn them off one by one and let the author know.`, 'color: #bada55');
  2890.  
  2891.                           console.groupEnd();
  2892.                         } else if (allowDontRender === true) {
  2893.                           return true;
  2894.                         }
  2895.                       }
  2896.                       await new Promise(r => setTimeout(r, 1));
  2897.                       if (fn()) {
  2898.                         await new Promise(r => requestAnimationFrame(r));
  2899.                         if (fn()) {
  2900.                           skz.remove();
  2901.                           skz.textContent = '';
  2902.                           console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2903.                         }
  2904.                       }
  2905.                     });
  2906.  
  2907.                   }
  2908.  
  2909.                 }, 1);
  2910.  
  2911.               }).catch(console.warn);
  2912.  
  2913.             })
  2914.  
  2915.           }
  2916.  
  2917.  
  2918.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2919.  
  2920.             (() => {
  2921.  
  2922.               const tag = 'yt-iframed-player-events-relay'
  2923.               const dummy = document.createElement(tag);
  2924.  
  2925.               const cProto = getProto(dummy);
  2926.               if (!cProto || !cProto.handlePostMessage_) {
  2927.                 console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2928.                 return;
  2929.               }
  2930.  
  2931.               if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2932.  
  2933.                 cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2934.  
  2935.                 cProto.handlePostMessage67_ = function (a) {
  2936.  
  2937.                   const da = a.data;
  2938.  
  2939.  
  2940.  
  2941.                   playEventsStack = playEventsStack.then(() => {
  2942.  
  2943.  
  2944.  
  2945.                     if ('yt-player-state-change' in da) {
  2946.  
  2947.                       const qc = da['yt-player-state-change'];
  2948.  
  2949.  
  2950.                       let isQcChanged = false;
  2951.  
  2952.                       if (qc === 2) { isQcChanged = qc !== _playerState; _playerState = 2; relayCount = 0; } // paused
  2953.                       else if (qc === 3) { isQcChanged = qc !== _playerState; _playerState = 3; } // playing
  2954.                       else if (qc === 1) { isQcChanged = qc !== _playerState; _playerState = 1; } // playing
  2955.  
  2956.  
  2957.                       if ((isQcChanged) && playerState !== _playerState) {
  2958.                         playerEventsByIframeRelay = true;
  2959.                         onPlayStateChangePromise = new Promise((resolve) => {
  2960.                           let k = _playerState;
  2961.                           foregroundPromiseFn().then(() => {
  2962.                             if (k === _playerState && playerState !== _playerState) playerState = _playerState;
  2963.                             onPlayStateChangePromise = null;
  2964.                             resolve();
  2965.                           })
  2966.                         }).catch(console.warn);
  2967.  
  2968.                       }
  2969.  
  2970.                     } else if ('yt-player-video-progress' in da) {
  2971.                       const vp = da['yt-player-video-progress'];
  2972.  
  2973.  
  2974.                       relayCount++;
  2975.                       lastPlayerProgress = vp > 0 ? vp : 0;
  2976.  
  2977.  
  2978.                       if (relayPromise && vp > 0 && relayCount >= 2) {
  2979.                         if (onPlayStateChangePromise) {
  2980.                           onPlayStateChangePromise.then(() => {
  2981.                             relayPromise && relayPromise.resolve();
  2982.                             relayPromise = null;
  2983.                           })
  2984.                         } else {
  2985.                           relayPromise.resolve();
  2986.                           relayPromise = null;
  2987.                         }
  2988.                       }
  2989.  
  2990.  
  2991.  
  2992.                     }
  2993.  
  2994.  
  2995.  
  2996.  
  2997.  
  2998.  
  2999.                     return this.handlePostMessage66_(a);
  3000.  
  3001.  
  3002.  
  3003.                   }).catch(console.warn);
  3004.  
  3005.                 }
  3006.  
  3007.  
  3008.                 cProto.handlePostMessage_ = function (a) {
  3009.  
  3010.  
  3011.                   const da = (a || 0).data || 0;
  3012.  
  3013.                   if (typeof da !== 'object') return;
  3014.  
  3015.                   if (waitForInitialDataCompletion === 1) return;
  3016.  
  3017.                   if (!isPlayProgressTriggered) {
  3018.                     isPlayProgressTriggered = true;
  3019.  
  3020.                     if ('yt-player-video-progress' in da) {
  3021.                       waitForInitialDataCompletion = 1;
  3022.  
  3023.                       const wrapWith = (data) => {
  3024.                         const { origin } = a;
  3025.                         return {
  3026.                           origin,
  3027.                           data
  3028.                         };
  3029.                       }
  3030.  
  3031.                       this.handlePostMessage67_(wrapWith({
  3032.                         "yt-iframed-parent-ready": true
  3033.                       }));
  3034.  
  3035.  
  3036.  
  3037.                       playEventsStack = playEventsStack.then(() => {
  3038.  
  3039.  
  3040.  
  3041.                         const lcr = document.querySelector('yt-live-chat-renderer');
  3042.                         const psc = document.querySelector("yt-player-seek-continuation");
  3043.                         if (lcr && psc && lcr.replayBuffer_) {
  3044.  
  3045.  
  3046.                           const rbProgress = lcr.replayBuffer_.lastVideoOffsetTimeMsec;
  3047.                           const daProgress = da['yt-player-video-progress'] * 1000
  3048.                           // document.querySelector('yt-live-chat-renderer').playerProgressChanged_(1e-5);
  3049.  
  3050.  
  3051.                           const front_ = (lcr.replayBuffer_.replayQueue || 0).front_;
  3052.                           const back_ = (lcr.replayBuffer_.replayQueue || 0).back_;
  3053.  
  3054.  
  3055.                           // console.log(deepCopy( front_))
  3056.                           // console.log(deepCopy( back_))
  3057.                           // console.log(rbProgress, daProgress, )
  3058.                           if (front_ && back_ && rbProgress > daProgress && back_.length > 2 && back_.some(e => e && +e.videoOffsetTimeMsec > daProgress) && back_.some(e => e && +e.videoOffsetTimeMsec < daProgress)) {
  3059.                             // no action
  3060.                             // console.log('ss1')
  3061.                           } else if (rbProgress < daProgress + 3400 && rbProgress > daProgress - 1200) {
  3062.                             //  daProgress - 1200 < rbProgress < daProgress + 3400
  3063.                             // console.log('ss2')
  3064.                           } else {
  3065.  
  3066.                             // console.log('ss3')
  3067.                             // lcr.replayBuffer_.replayQueue.back_.length= 0;
  3068.                             // lcr.replayBuffer_.replayQueue.front_.length= 0;
  3069.  
  3070.                             // lcr
  3071.                             lcr.previousProgressSec = 1E-5;
  3072.                             // lcr._setIsSeeking(!0),
  3073.                             lcr.replayBuffer_.clear()
  3074.                             psc.fireSeekContinuation_(da['yt-player-video-progress']);
  3075.                           }
  3076.  
  3077.                         }
  3078.  
  3079.  
  3080.                         waitForInitialDataCompletion = 2;
  3081.  
  3082.                         this.handlePostMessage_(a);
  3083.  
  3084.  
  3085.                       }).catch(console.warn);
  3086.  
  3087.  
  3088.  
  3089.                       return;
  3090.  
  3091.                     }
  3092.  
  3093.                   }
  3094.  
  3095.  
  3096.  
  3097.                   this.handlePostMessage67_(a);
  3098.  
  3099.  
  3100.  
  3101.                 }
  3102.  
  3103.               }
  3104.  
  3105.  
  3106.             })();
  3107.  
  3108.           }
  3109.  
  3110.           if (isFirstList && DO_CHECK_TICKER_BACKGROUND_OVERRIDED) {
  3111.             setTimeout(() => {
  3112.               if (!hasTimerModified) return;
  3113.               const tickerRenderer = document.querySelector('#ticker yt-live-chat-ticker-renderer.style-scope.yt-live-chat-renderer');
  3114.               if (!tickerRenderer) return;
  3115.  
  3116.               const tickerRendererDollar = indr(tickerRenderer);
  3117.               const items = (tickerRendererDollar || 0).items || 0;
  3118.               if (!items) return;
  3119.               const template = document.createElement('template');
  3120.               template.innerHTML = `<yt-live-chat-ticker-dummy777-item-renderer class="style-scope yt-live-chat-ticker-renderer" whole-message-clickable=""
  3121.                 modern="" aria-label="¥1,000" role="button" tabindex="0" id="Chw777" style="width: 94px; overflow: hidden;"
  3122.                 dimmed="" [dummy777]>
  3123.                 <div id="container" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer"
  3124.                   style="--background:linear-gradient(90deg, rgba(1,2,3,1),rgba(1,2,3,1) 7%,rgba(4,0,0,1) 7%,rgba(4,0,0,1));">
  3125.                   <div id="content" class="style-scope yt-live-chat-ticker-dummy777-item-renderer" style="color: rgb(255, 255, 255);">
  3126.                     <yt-img-shadow777 id="author-photo" height="24" width="24"
  3127.                       class="style-scope yt-live-chat-ticker-dummy777-item-renderer no-transition"
  3128.                       style="background-color: transparent;" loaded=""><img id="img"
  3129.                         draggable="false" class="style-scope yt-img-shadow" alt="I" height="24" width="24"
  3130.                         src="${dummyImgURL}"></yt-img-shadow777>
  3131.  
  3132.                     <span id="text" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer">¥1,000</span>
  3133.                   </div>
  3134.                 </div>
  3135.               </yt-live-chat-ticker-dummy777-item-renderer>`;
  3136.               const dummy777 = template.content.firstElementChild;
  3137.               items.appendChild(dummy777);
  3138.               Promise.resolve(dummy777).then((dummy777) => {
  3139.                 let container = HTMLElement.prototype.querySelector.call(dummy777, '#container') || 0;
  3140.                 if (container.isConnected === true) {
  3141.  
  3142.                   const evaluated = `${getComputedStyle(container).background}`;
  3143.  
  3144.                   container = null;
  3145.                   dummy777.remove();
  3146.                   dummy777.textContent = '';
  3147.                   dummy777 = null;
  3148.  
  3149.                   if (evaluated.indexOf('0.') < 4) {
  3150.  
  3151.                     // not fulfilling
  3152.                     // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  3153.  
  3154.                     console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3155.                       "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3156.                       "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3157.                     );
  3158.                     console.warn(`%cWarning:\n\tYou might have added a userscript or extension that also modifies the ticker background.\n\tYouTube Super Fast Chat is taking over.`, 'color: #bada55');
  3159.                     console.groupEnd();
  3160.  
  3161.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND (Overriding other scripting)', 'background-color: #7eb32b; color: #102624; padding: 2px 4px');
  3162.  
  3163.                   } else {
  3164.  
  3165.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  3166.                   }
  3167.                 }
  3168.               });
  3169.  
  3170.             }, 800);
  3171.           }
  3172.  
  3173.         }
  3174.       }
  3175.  
  3176.       return { setupMutObserver };
  3177.  
  3178.  
  3179.  
  3180.     })();
  3181.  
  3182.     const setupEvents = () => {
  3183.  
  3184.  
  3185.       let scrollCount = 0;
  3186.  
  3187.       const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  3188.  
  3189.  
  3190.       const delayFlushActiveItemsAfterUserActionK_ = () => {
  3191.  
  3192.         const lcRenderer = lcRendererElm();
  3193.         if (lcRenderer) {
  3194.           const cnt = insp(lcRenderer);
  3195.           if (!cnt.hasUserJustInteracted11_) return;
  3196.           if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  3197.             cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  3198.           }
  3199.         }
  3200.  
  3201.       }
  3202.  
  3203.       document.addEventListener('scroll', (evt) => {
  3204.         if (!evt || !evt.isTrusted) return;
  3205.         // lastScroll = dateNow();
  3206.         if (++scrollCount > 1e9) scrollCount = 9;
  3207.       }, passiveCapture); // support contain => support passive
  3208.  
  3209.       let lastScrollCount = -1;
  3210.       document.addEventListener('wheel', (evt) => {
  3211.         if (!evt || !evt.isTrusted) return;
  3212.         if (lastScrollCount === scrollCount) return;
  3213.         lastScrollCount = scrollCount;
  3214.         lastWheel = dateNow();
  3215.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3216.       }, passiveCapture); // support contain => support passive
  3217.  
  3218.       document.addEventListener('mousedown', (evt) => {
  3219.         if (!evt || !evt.isTrusted) return;
  3220.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  3221.         lastMouseDown = dateNow();
  3222.         currentMouseDown = true;
  3223.         lastUserInteraction = lastMouseDown;
  3224.       }, passiveCapture);
  3225.  
  3226.       document.addEventListener('pointerdown', (evt) => {
  3227.         if (!evt || !evt.isTrusted) return;
  3228.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  3229.         lastMouseDown = dateNow();
  3230.         currentMouseDown = true;
  3231.         lastUserInteraction = lastMouseDown;
  3232.       }, passiveCapture);
  3233.  
  3234.       document.addEventListener('click', (evt) => {
  3235.         if (!evt || !evt.isTrusted) return;
  3236.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  3237.         lastMouseDown = lastMouseUp = dateNow();
  3238.         currentMouseDown = false;
  3239.         lastUserInteraction = lastMouseDown;
  3240.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3241.       }, passiveCapture);
  3242.  
  3243.       document.addEventListener('tap', (evt) => {
  3244.         if (!evt || !evt.isTrusted) return;
  3245.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  3246.         lastMouseDown = lastMouseUp = dateNow();
  3247.         currentMouseDown = false;
  3248.         lastUserInteraction = lastMouseDown;
  3249.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3250.       }, passiveCapture);
  3251.  
  3252.  
  3253.       document.addEventListener('mouseup', (evt) => {
  3254.         if (!evt || !evt.isTrusted) return;
  3255.         if (currentMouseDown) {
  3256.           lastMouseUp = dateNow();
  3257.           currentMouseDown = false;
  3258.           lastUserInteraction = lastMouseUp;
  3259.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3260.         }
  3261.       }, passiveCapture);
  3262.  
  3263.  
  3264.       document.addEventListener('pointerup', (evt) => {
  3265.         if (!evt || !evt.isTrusted) return;
  3266.         if (currentMouseDown) {
  3267.           lastMouseUp = dateNow();
  3268.           currentMouseDown = false;
  3269.           lastUserInteraction = lastMouseUp;
  3270.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3271.         }
  3272.       }, passiveCapture);
  3273.  
  3274.       document.addEventListener('touchstart', (evt) => {
  3275.         if (!evt || !evt.isTrusted) return;
  3276.         lastTouchDown = dateNow();
  3277.         currentTouchDown = true;
  3278.         lastUserInteraction = lastTouchDown;
  3279.       }, passiveCapture);
  3280.  
  3281.       document.addEventListener('touchmove', (evt) => {
  3282.         if (!evt || !evt.isTrusted) return;
  3283.         lastTouchDown = dateNow();
  3284.         currentTouchDown = true;
  3285.         lastUserInteraction = lastTouchDown;
  3286.       }, passiveCapture);
  3287.  
  3288.       document.addEventListener('touchend', (evt) => {
  3289.         if (!evt || !evt.isTrusted) return;
  3290.         if (currentTouchDown) {
  3291.           lastTouchUp = dateNow();
  3292.           currentTouchDown = false;
  3293.           lastUserInteraction = lastTouchUp;
  3294.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3295.         }
  3296.       }, passiveCapture);
  3297.  
  3298.       document.addEventListener('touchcancel', (evt) => {
  3299.         if (!evt || !evt.isTrusted) return;
  3300.         if (currentTouchDown) {
  3301.           lastTouchUp = dateNow();
  3302.           currentTouchDown = false;
  3303.           lastUserInteraction = lastTouchUp;
  3304.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  3305.         }
  3306.       }, passiveCapture);
  3307.  
  3308.  
  3309.     }
  3310.  
  3311.     const getTimestampUsec = (itemRenderer) => {
  3312.       if (itemRenderer && 'timestampUsec' in itemRenderer) {
  3313.         return itemRenderer.timestampUsec
  3314.       } else if (itemRenderer && itemRenderer.showItemEndpoint) {
  3315.         const messageRenderer = ((itemRenderer.showItemEndpoint.showLiveChatItemEndpoint || 0).renderer || 0);
  3316.         if (messageRenderer) {
  3317.  
  3318.           const messageRendererKey = firstObjectKey(messageRenderer);
  3319.           if (messageRendererKey && messageRenderer[messageRendererKey]) {
  3320.             const messageRendererData = messageRenderer[messageRendererKey];
  3321.             if (messageRendererData && 'timestampUsec' in messageRendererData) {
  3322.               return messageRendererData.timestampUsec
  3323.             }
  3324.           }
  3325.         }
  3326.       }
  3327.       return null;
  3328.     }
  3329.  
  3330.     const onRegistryReadyForDOMOperations = () => {
  3331.  
  3332.       let firstCheckedOnYtInit = false;
  3333.  
  3334.       const assertorURL = () => assertor(() => location.pathname.startsWith('/live_chat') && (location.search.indexOf('continuation=') > 0 || location.search.indexOf('v=') > 0));
  3335.  
  3336.       const mightFirstCheckOnYtInit = () => {
  3337.         if (firstCheckedOnYtInit) return;
  3338.         firstCheckedOnYtInit = true;
  3339.  
  3340.         if (!document.body || !document.head) return;
  3341.         if (!assertorURL()) return;
  3342.  
  3343.         addCssManaged();
  3344.  
  3345.         let efsContainer = document.getElementById('elzm-fonts-yk75g');
  3346.         if (efsContainer && efsContainer.parentNode !== document.body) {
  3347.           document.body.appendChild(efsContainer);
  3348.         }
  3349.  
  3350.       };
  3351.  
  3352.       if (!assertorURL()) return;
  3353.       // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  3354.  
  3355.       if (document.documentElement && document.head) {
  3356.         addCssManaged();
  3357.       }
  3358.       // console.log(document.body===null)
  3359.  
  3360.       if (ATTEMPT_TICKER_ANIMATION_START_TIME_DETECTION) {
  3361.         getLCRDummy().then(async (lcrDummy) => {
  3362.  
  3363.           const tag = "yt-live-chat-renderer"
  3364.           const dummy = lcrDummy;
  3365.  
  3366.           const cProto = getProto(dummy);
  3367.           if (!cProto || !cProto.attached) {
  3368.             console.warn(`proto.attached for ${tag} is unavailable.`);
  3369.             return;
  3370.           }
  3371.  
  3372.           mightFirstCheckOnYtInit();
  3373.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  3374.           console.log("[Begin]");
  3375.  
  3376.  
  3377.  
  3378.  
  3379.  
  3380.  
  3381.           if (typeof cProto.playerProgressChanged_ === 'function' && !cProto.playerProgressChanged32_) {
  3382.  
  3383.             cProto.playerProgressChanged32_ = cProto.playerProgressChanged_;
  3384.  
  3385.             const pop078 = function () {
  3386.               const r = this.pop78();
  3387.  
  3388.               if (r && (r.actions || 0).length >= 1 && r.videoOffsetTimeMsec) {
  3389.                 for (const action of r.actions) {
  3390.  
  3391.                   const itemActionKey = !action ? null : 'addChatItemAction' in action ? 'addChatItemAction' : 'addLiveChatTickerItemAction' in action ? 'addLiveChatTickerItemAction' : null;
  3392.                   if (itemActionKey) {
  3393.  
  3394.                     const itemAction = action[itemActionKey];
  3395.                     const item = (itemAction || 0).item;
  3396.                     if (typeof item === 'object') {
  3397.  
  3398.                       const rendererKey = firstObjectKey(item);
  3399.                       if (rendererKey) {
  3400.                         const renderer = item[rendererKey];
  3401.                         if (renderer && typeof renderer === 'object') {
  3402.                           renderer.__videoOffsetTimeMsec__ = r.videoOffsetTimeMsec;
  3403.                           renderer.__progressAt__ = playerProgressChangedArg1;
  3404.                         }
  3405.  
  3406.                       }
  3407.  
  3408.                     }
  3409.                   }
  3410.                 }
  3411.               }
  3412.               return r;
  3413.             }
  3414.  
  3415.             cProto.playerProgressChanged_ = function (a, b, c) {
  3416.               playerProgressChangedArg1 = a;
  3417.               playerProgressChangedArg2 = b;
  3418.               playerProgressChangedArg3 = c;
  3419.               const replayBuffer_ = this.replayBuffer_;
  3420.               if (replayBuffer_) {
  3421.                 const replayQueue = replayBuffer_.replayQueue
  3422.                 if (replayQueue && typeof replayQueue === 'object' && !replayQueue.qe3) {
  3423.  
  3424.                   replayBuffer_.replayQueue = new Proxy(replayBuffer_.replayQueue, {
  3425.                     get(target, prop, receiver) {
  3426.                       if (prop === 'qe3') return 1;
  3427.                       const v = target[prop];
  3428.                       if (prop === 'front_') {
  3429.                         if (v && typeof v.length === 'number') {
  3430.                           if (!v.pop78) {
  3431.                             v.pop78 = v.pop;
  3432.                             v.pop = pop078;
  3433.                           }
  3434.                         }
  3435.                       }
  3436.                       return v;
  3437.                     }
  3438.                   });
  3439.  
  3440.                 }
  3441.               }
  3442.               return this.playerProgressChanged32_.apply(this, arguments);
  3443.             };
  3444.  
  3445.           }
  3446.  
  3447.           // if (typeof cProto.immediatelyApplyLiveChatActions === 'function' && !cProto.immediatelyApplyLiveChatActions32) {
  3448.  
  3449.           //   cProto.immediatelyApplyLiveChatActions32 = cProto.immediatelyApplyLiveChatActions;
  3450.  
  3451.           //   cProto.immediatelyApplyLiveChatActions = function (a) {
  3452.           //     // if (a.length > 8) {
  3453.           //     //   console.log(a)
  3454.           //     // }
  3455.           //     // console.log(a)
  3456.           //     /*
  3457.           //     let arr=a.slice();
  3458.  
  3459.           //     if(arr.length >= 2){
  3460.           //       arr.sort((a, b)=>{
  3461.           //         let ak = firstObjectKey(a);
  3462.           //         let bk = firstObjectKey(b);
  3463.           //         if(!ak||!bk) return 0;
  3464.           //         const ax = +a[ak]._timestampUsec57;
  3465.           //         const bx = +b[bk]._timestampUsec57;
  3466.           //         if(ax >0 && bx >0){
  3467.           //           const c =  bx - ax ;
  3468.  
  3469.           //           return c > 0.1 ? -1 : c< -0.1 ? 1 : 0;
  3470.           //         }
  3471.           //         return 0;
  3472.  
  3473.           //       });
  3474.           //       console.log('sort', JSON.parse(JSON.stringify(arr)));
  3475.           //     }
  3476.           //     a=arr;
  3477.           //     */
  3478.  
  3479.           //     if (a && typeof a === 'object' && a.length >= 1) {
  3480.           //       const d = Date.now();
  3481.           //       const m = [];
  3482.           //       for (let i = 0, l = a.length; i < l; i++) {
  3483.           //         const action = a[i];
  3484.           //         const key = !action ? null : 'addChatItemAction' in action ? 'addChatItemAction' : 'addLiveChatTickerItemAction' in action ? 'addLiveChatTickerItemAction' : null;
  3485.           //         if (key === 'addChatItemAction' || key === 'addLiveChatTickerItemAction') {
  3486.           //           const itemAction = action[key] || 0;
  3487.           //           const item = itemAction.item || 0;
  3488.           //           if (item && typeof item === 'object') {
  3489.           //             let rendererKey = firstObjectKey(item);
  3490.           //             const renderer = item[rendererKey];
  3491.           //             let timestampUsec = getTimestampUsec(renderer);
  3492.           //             if (timestampUsec !== null) {
  3493.           //               renderer._timestampUsec57 = timestampUsec;
  3494.           //             }
  3495.           //             m.push(renderer);
  3496.           //             // if(timestampUsec!==null){
  3497.           //             //   if(key==='addLiveChatTickerItemAction')console.log(renderer, rendererKey, key)
  3498.           //             //   m.push(renderer);
  3499.  
  3500.           //             // }
  3501.           //           }
  3502.           //         }
  3503.           //       }
  3504.           //       if (m.length >= 1) {
  3505.  
  3506.           //         let lastUsec = null;
  3507.           //         for (let i = 0, l = m.length; i < l; i++) {
  3508.           //           const renderer = m[i];
  3509.           //           if ('_timestampUsec57' in renderer) {
  3510.           //             lastUsec = +renderer._timestampUsec57 / 1E3;
  3511.           //             renderer.__lcrTime__ = d;
  3512.           //             renderer.__actionAt__ = d;
  3513.           //           }
  3514.           //         }
  3515.  
  3516.  
  3517.           //         if (lastUsec !== null) {
  3518.  
  3519.           //           const refUsec = lastUsec
  3520.  
  3521.           //           let prevUsec = null;
  3522.           //           for (let i = 0, l = m.length; i < l; i++) {
  3523.           //             const renderer = m[i];
  3524.           //             if ('_timestampUsec57' in renderer) {
  3525.  
  3526.           //               let actualTime = +renderer._timestampUsec57 / 1E3; // ms
  3527.           //               let lcrTime = d - Math.round(refUsec - actualTime); // ms
  3528.  
  3529.           //               renderer.__lcrTime__ = lcrTime; // ms
  3530.           //               renderer.__actionAt__ = d;
  3531.  
  3532.           //               prevUsec = lcrTime
  3533.           //             } else {
  3534.  
  3535.           //               renderer._prevUsec57 = prevUsec;
  3536.           //             }
  3537.           //           }
  3538.  
  3539.  
  3540.           //           let nextUsec = null;
  3541.           //           for (let i = m.length - 1; i >= 0; i--) {
  3542.           //             const renderer = m[i];
  3543.           //             if ('_timestampUsec57' in renderer) {
  3544.  
  3545.           //               nextUsec = renderer.__lcrTime__
  3546.           //             } else {
  3547.  
  3548.           //               renderer._nextUsec57 = nextUsec;
  3549.  
  3550.           //               if (renderer._nextUsec57 > 0 && renderer._prevUsec57 > 0 && renderer._nextUsec57 > renderer._prevUsec57) {
  3551.           //                 renderer.__lcrTime__ = (renderer._nextUsec57 + renderer._prevUsec57) / 2;
  3552.           //                 renderer.__actionAt__ = d;
  3553.           //               }
  3554.           //             }
  3555.           //           }
  3556.  
  3557.  
  3558.           //         }
  3559.  
  3560.  
  3561.           //       }
  3562.           //     }
  3563.           //     return this.immediatelyApplyLiveChatActions32.apply(this, arguments)
  3564.           //   }
  3565.  
  3566.  
  3567.           // }
  3568.  
  3569.  
  3570.  
  3571.           console.log("[End]");
  3572.           console.groupEnd();
  3573.  
  3574.  
  3575.         });
  3576.  
  3577.       }
  3578.  
  3579.       customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  3580.  
  3581.         const tag = "yt-live-chat-item-list-renderer"
  3582.         const dummy = document.createElement(tag);
  3583.  
  3584.         const cProto = getProto(dummy);
  3585.         if (!cProto || !cProto.attached) {
  3586.           console.warn(`proto.attached for ${tag} is unavailable.`);
  3587.           return;
  3588.         }
  3589.  
  3590.         mightFirstCheckOnYtInit();
  3591.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  3592.         console.log("[Begin]");
  3593.  
  3594.         const mclp = cProto;
  3595.         try {
  3596.           assertor(() => typeof mclp.scrollToBottom_ === 'function');
  3597.           assertor(() => typeof mclp.flushActiveItems_ === 'function');
  3598.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  3599.           assertor(() => typeof mclp.setAtBottom === 'function');
  3600.           assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  3601.           assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  3602.         } catch (e) { }
  3603.  
  3604.  
  3605.         try {
  3606.           assertor(() => typeof mclp.attached === 'function');
  3607.           assertor(() => typeof mclp.detached === 'function');
  3608.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  3609.           assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  3610.           assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  3611.           assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  3612.           assertor(() => typeof mclp.smoothScroll_ === 'function');
  3613.           assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  3614.         } catch (e) { }
  3615.  
  3616.         mclp.__intermediate_delay__ = null;
  3617.  
  3618.         let mzk = 0;
  3619.         let myk = 0;
  3620.         let mlf = 0;
  3621.         let myw = 0;
  3622.         let mzt = 0;
  3623.         let zarr = null;
  3624.         let mlg = 0;
  3625.  
  3626.         if ((mclp.clearList || 0).length === 0) {
  3627.           assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  3628.           mclp.clearList66 = mclp.clearList;
  3629.           mclp.clearList = function () {
  3630.             mzk++;
  3631.             myk++;
  3632.             mlf++;
  3633.             myw++;
  3634.             mzt++;
  3635.             mlg++;
  3636.             zarr = null;
  3637.             this.__intermediate_delay__ = null;
  3638.             this.clearList66();
  3639.           };
  3640.           console.log("clearList", "OK");
  3641.         } else {
  3642.           console.log("clearList", "NG");
  3643.         }
  3644.  
  3645.  
  3646.         let onListRendererAttachedDone = false;
  3647.  
  3648.         function setList(itemOffset, items) {
  3649.  
  3650.           const isFirstTime = onListRendererAttachedDone === false;
  3651.  
  3652.           if (isFirstTime) {
  3653.             onListRendererAttachedDone = true;
  3654.             Promise.resolve().then(watchUserCSS);
  3655.             addCssManaged();
  3656.             setupEvents();
  3657.           }
  3658.  
  3659.           setupStyle(itemOffset, items);
  3660.  
  3661.           setupMutObserver(items);
  3662.         }
  3663.  
  3664.         mclp.attached419 = async function () {
  3665.  
  3666.           if (!this.isAttached) return;
  3667.  
  3668.           let maxTrial = 16;
  3669.           while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  3670.             if (--maxTrial < 0 || !this.isAttached) return;
  3671.             await new Promise(requestAnimationFrame);
  3672.           }
  3673.  
  3674.           if (this.isAttached !== true) return;
  3675.  
  3676.           if (!this.$) {
  3677.             console.warn("!this.$");
  3678.             return;
  3679.           }
  3680.           if (!this.$) return;
  3681.           /** @type {HTMLElement | null} */
  3682.           const itemScroller = this.$['item-scroller'];
  3683.           /** @type {HTMLElement | null} */
  3684.           const itemOffset = this.$['item-offset'];
  3685.           /** @type {HTMLElement | null} */
  3686.           const items = this.$['items'];
  3687.  
  3688.           if (!itemScroller || !itemOffset || !items) {
  3689.             console.warn("items.parentNode !== itemOffset");
  3690.             return;
  3691.           }
  3692.  
  3693.           if (nodeParent(items) !== itemOffset) {
  3694.  
  3695.             console.warn("items.parentNode !== itemOffset");
  3696.             return;
  3697.           }
  3698.  
  3699.  
  3700.           if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  3701.  
  3702.             console.warn("id incorrect");
  3703.             return;
  3704.           }
  3705.  
  3706.           const isTargetItems = HTMLElement.prototype.matches.call(items, '#item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer')
  3707.  
  3708.           if (!isTargetItems) {
  3709.             console.warn("!isTargetItems");
  3710.             return;
  3711.           }
  3712.  
  3713.           setList(itemOffset, items);
  3714.  
  3715.         }
  3716.  
  3717.         mclp.attached331 = mclp.attached;
  3718.         mclp.attached = function () {
  3719.           this.attached419 && this.attached419();
  3720.           return this.attached331();
  3721.         }
  3722.  
  3723.         mclp.detached331 = mclp.detached;
  3724.  
  3725.         mclp.detached = function () {
  3726.           setupMutObserver();
  3727.           return this.detached331();
  3728.         }
  3729.  
  3730.         const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  3731.         for (const t29 of t29s) {
  3732.           if (insp(t29).isAttached === true) {
  3733.             t29.attached419();
  3734.           }
  3735.         }
  3736.  
  3737.         if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  3738.  
  3739.           assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  3740.           assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  3741.  
  3742.           /** @type {Map<number, any>} */
  3743.           const aMap = new Map();
  3744.           let count = 6150;
  3745.           mclp.async66 = mclp.async;
  3746.           mclp.async = function (e, f) {
  3747.             // ensure the previous operation is done
  3748.             // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  3749.             const hasF = arguments.length === 2;
  3750.             const stack = new Error().stack;
  3751.             const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  3752.             if (count > 1e9) count = 6159;
  3753.             const resId = ++count;
  3754.             aMap.set(resId, e);
  3755.             (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  3756.               const rp = aMap.get(resId);
  3757.               if (typeof rp !== 'function') {
  3758.                 return;
  3759.               }
  3760.               let cancelCall = false;
  3761.               if (isFlushAsync) {
  3762.                 if (rk < 0) {
  3763.                   cancelCall = true;
  3764.                 } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  3765.                   cancelCall = true;
  3766.                 }
  3767.               }
  3768.               if (cancelCall) {
  3769.                 aMap.delete(resId);
  3770.               } else {
  3771.                 const asyncEn = function () {
  3772.                   aMap.delete(resId);
  3773.                   return rp.apply(this, arguments);
  3774.                 };
  3775.                 aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3776.               }
  3777.             });
  3778.  
  3779.             return resId;
  3780.           }
  3781.  
  3782.           mclp.cancelAsync66 = mclp.cancelAsync;
  3783.           mclp.cancelAsync = function (resId) {
  3784.             if (resId <= 6150) {
  3785.               this.cancelAsync66(resId);
  3786.             } else if (aMap.has(resId)) {
  3787.               const rp = aMap.get(resId);
  3788.               aMap.delete(resId);
  3789.               if (typeof rp !== 'function') {
  3790.                 this.cancelAsync66(rp);
  3791.               }
  3792.             }
  3793.           }
  3794.  
  3795.           console.log("async", "OK");
  3796.         } else {
  3797.           console.log("async", "NG");
  3798.         }
  3799.  
  3800.  
  3801.         if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3802.  
  3803.           assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3804.           mclp.showNewItems66_ = mclp.showNewItems_;
  3805.  
  3806.           mclp.showNewItems77_ = async function () {
  3807.             if (myk > 1e9) myk = 9;
  3808.             let tid = ++myk;
  3809.  
  3810.             await new Promise(requestAnimationFrame);
  3811.  
  3812.             if (tid !== myk) {
  3813.               return;
  3814.             }
  3815.  
  3816.             const cnt = this;
  3817.  
  3818.             await Promise.resolve();
  3819.             cnt.showNewItems66_();
  3820.  
  3821.             await Promise.resolve();
  3822.  
  3823.           }
  3824.  
  3825.           mclp.showNewItems_ = function () {
  3826.  
  3827.             const cnt = this;
  3828.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3829.               cnt.showNewItems77_().then(() => {
  3830.                 resolve();
  3831.               });
  3832.             });
  3833.           }
  3834.  
  3835.           console.log("showNewItems_", "OK");
  3836.         } else {
  3837.           console.log("showNewItems_", "NG");
  3838.         }
  3839.  
  3840.  
  3841.         if ((mclp.flushActiveItems_ || 0).length === 0) {
  3842.  
  3843.           const sfi = fnIntegrity(mclp.flushActiveItems_);
  3844.           if (sfi === '0.150.84') {
  3845.             // https://www.youtube.com/s/desktop/e4d15d2c/jsbin/live_chat_polymer.vflset/live_chat_polymer.js
  3846.             // var b = Math.max(this.visibleItems.length + this.activeItems_.length - this.data.maxItemsToDisplay, 0);
  3847.             //     b && this.splice("visibleItems", 0, b);
  3848.             //     if (this.isSmoothScrollEnabled_() || this.dockableMessages.length)
  3849.             //         this.preinsertHeight_ = this.items.clientHeight;
  3850.             //     this.activeItems_.unshift("visibleItems");
  3851.             //     try {
  3852.             //         this.push.apply(this, this.activeItems_)
  3853.             //     } catch (c) {
  3854.             //         nm(c)
  3855.             //     }
  3856.             //     this.activeItems_ = [];
  3857.             //     this.isSmoothScrollEnabled_() ? this.canScrollToBottom_() && zQ(function() {
  3858.             //         a.showNewItems_()
  3859.             //     }) : zQ(function() {
  3860.             //         a.maybeScrollToBottom_()
  3861.             //     })
  3862.           } else if (sfi === '0.137.81' || sfi === '0.138.81') {
  3863.             // e.g. https://www.youtube.com/yts/jsbin/live_chat_polymer-vflCyWEBP/live_chat_polymer.js
  3864.           } else {
  3865.             assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.150.84'));
  3866.           }
  3867.  
  3868.           let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3869.  
  3870.           let contensWillChangeController = null;
  3871.  
  3872.           mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3873.  
  3874.           mclp.flushActiveItems78_ = async function (tid) {
  3875.             try {
  3876.               if (tid !== mlf) return;
  3877.               const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3878.               let logger = false;
  3879.               const cnt = this;
  3880.               let immd = cnt.__intermediate_delay__;
  3881.               await new Promise(requestAnimationFrame);
  3882.  
  3883.               if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3884.               if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3885.  
  3886.               mlf++;
  3887.               if (mlg > 1e9) mlg = 9;
  3888.               ++mlg;
  3889.  
  3890.               const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3891.               const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3892.               let changeMaxItemsToDisplay = false;
  3893.               const activeItemsLen = this.activeItems_.length;
  3894.               if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3895.                 logger = true;
  3896.  
  3897.                 groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3898.  
  3899.                 logger && console.log('[Begin]')
  3900.  
  3901.                 console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3902.                 if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3903.                   console.log('reduce maxitems');
  3904.                   if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3905.                     // as all the rendered chats are already "outdated"
  3906.                     // all old chats shall remove and reduced number of few chats will be rendered
  3907.                     // then restore to the original number
  3908.                     changeMaxItemsToDisplay = true;
  3909.                     this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3910.                     console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3911.                   }
  3912.                   this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3913.                   //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3914.  
  3915.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3916.                 } else {
  3917.                   this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3918.  
  3919.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3920.                 }
  3921.               }
  3922.               // it is found that it will render all stacked chats after switching back from background
  3923.               // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3924.               // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3925.  
  3926.  
  3927.               const items = (cnt.$ || 0).items;
  3928.  
  3929.               if (USE_WILL_CHANGE_CONTROLLER) {
  3930.                 if (contensWillChangeController && contensWillChangeController.element !== items) {
  3931.                   contensWillChangeController.release();
  3932.                   contensWillChangeController = null;
  3933.                 }
  3934.                 if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3935.               }
  3936.               const wcController = contensWillChangeController;
  3937.               cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3938.               wcController && wcController.beforeOper();
  3939.               await Promise.resolve();
  3940.               const acItems = cnt.activeItems_;
  3941.               const len1 = acItems.length;
  3942.               if (!len1) console.warn('cnt.activeItems_.length = 0');
  3943.               let waitFor = [];
  3944.  
  3945.  
  3946.               /** @type {Set<string>} */
  3947.               const imageLinks = new Set();
  3948.  
  3949.               if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3950.                 for (const item of acItems) {
  3951.                   fixLiveChatItem(item, imageLinks);
  3952.                 }
  3953.               }
  3954.               if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3955.                 if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3956.                 if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3957.  
  3958.                 // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3959.                 const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3960.                 // preload performs the high priority fetching.
  3961.                 // prefetch delays the chat display if the video resoruce is demanding.
  3962.  
  3963.                 if (rel) {
  3964.  
  3965.                   imageLinks.forEach(imageLink => {
  3966.                     let d = false;
  3967.                     const isEmoji = imageLink.includes('/emoji/');
  3968.                     const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3969.                     if (!pretechedSet.has(imageLink)) {
  3970.                       pretechedSet.add(imageLink);
  3971.                       d = true;
  3972.                     }
  3973.                     if (d) {
  3974.                       waitFor.push(linker(null, rel, imageLink, 'image'));
  3975.  
  3976.                     }
  3977.                   })
  3978.  
  3979.                 }
  3980.  
  3981.               }
  3982.  
  3983.               const noVisibleItem1 = ((cnt.visibleItems || 0).length || 0) === 0;
  3984.               skipDontRender = noVisibleItem1;
  3985.               // console.log('ss1', Date.now())
  3986.               if (waitFor.length > 0) {
  3987.                 await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3988.               }
  3989.               waitFor.length = 0;
  3990.               waitFor = null;
  3991.               // console.log('ss2', Date.now())
  3992.               cnt.flushActiveItems66_();
  3993.               const noVisibleItem2 = ((cnt.visibleItems || 0).length || 0) === 0;
  3994.               skipDontRender = noVisibleItem2;
  3995.               const len2 = cnt.activeItems_.length;
  3996.               const bAsync = len1 !== len2;
  3997.               await Promise.resolve();
  3998.               if (wcController) {
  3999.                 if (bAsync) {
  4000.                   cnt.async(() => {
  4001.                     wcController.afterOper();
  4002.                   });
  4003.                 } else {
  4004.                   wcController.afterOper();
  4005.                 }
  4006.               }
  4007.               if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  4008.                 this.data.maxItemsToDisplay = tmpMaxItemsCount;
  4009.  
  4010.                 logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  4011.                 //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  4012.               } else if (changeMaxItemsToDisplay) {
  4013.  
  4014.                 logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  4015.                   maxItemsToDisplay: this.data.maxItemsToDisplay,
  4016.                   reducedMaxItemsToDisplay,
  4017.                   originalMaxItemsToDisplay: tmpMaxItemsCount
  4018.                 });
  4019.               }
  4020.               logger && console.log('[End]');
  4021.  
  4022.               logger && console.groupEnd();
  4023.  
  4024.               if (noVisibleItem1 && !noVisibleItem2) {
  4025.                 // fix possible no auto scroll issue.
  4026.                 setTimeout(() => cnt.setAtBottom(), 1);
  4027.               }
  4028.  
  4029.               if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  4030.  
  4031.  
  4032.                 const ff = () => {
  4033.  
  4034.                   if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  4035.                   //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  4036.                   if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  4037.                     cnt.scrollToBottom_();
  4038.  
  4039.                     Promise.resolve().then(() => {
  4040.  
  4041.                       if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  4042.                       if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  4043.                     });
  4044.  
  4045.  
  4046.                   }
  4047.                 }
  4048.  
  4049.                 ff();
  4050.  
  4051.  
  4052.                 Promise.resolve().then(ff);
  4053.  
  4054.                 // requestAnimationFrame(ff);
  4055.               } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  4056.  
  4057.                 const knt = cnt;
  4058.                 if (!scrollChatFn) {
  4059.                   const cnt = knt;
  4060.                   const f = () => {
  4061.                     const itemScroller = cnt.itemScroller;
  4062.                     if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  4063.                     if (!cnt.atBottom) {
  4064.                       cnt.scrollToBottom_();
  4065.                     } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  4066.                       itemScroller.scrollTop = itemScroller.scrollHeight;
  4067.                     }
  4068.                   };
  4069.                   scrollChatFn = () => Promise.resolve().then(f).then(f);
  4070.                 }
  4071.  
  4072.                 if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  4073.               }
  4074.  
  4075.               return 1;
  4076.  
  4077.  
  4078.             } catch (e) {
  4079.               console.warn(e);
  4080.             }
  4081.           }
  4082.  
  4083.           mclp.flushActiveItems77_ = function () {
  4084.  
  4085.             return new Promise(resResolve => {
  4086.               try {
  4087.                 const cnt = this;
  4088.                 if (mlf > 1e9) mlf = 9;
  4089.                 let tid = ++mlf;
  4090.                 const hostElement = cnt.hostElement || cnt;
  4091.                 if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  4092.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  4093.  
  4094.                 // 4 times to maxItems to avoid frequent trimming.
  4095.                 // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  4096.  
  4097.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  4098.                 this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  4099.                 if (cnt.canScrollToBottom_()) {
  4100.                   cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  4101.                     .then(() => cnt.flushActiveItems78_(tid)) // async function
  4102.                     .then((asyncResult) => {
  4103.                       resResolve(asyncResult); // either undefined or 1
  4104.                       resResolve = null;
  4105.                     }).catch((e) => {
  4106.                       console.warn(e);
  4107.                       if (resResolve) resResolve();
  4108.                     });
  4109.                 } else {
  4110.                   resResolve(2);
  4111.                   resResolve = null;
  4112.                 }
  4113.               } catch (e) {
  4114.                 console.warn(e);
  4115.                 if (resResolve) resResolve();
  4116.               }
  4117.  
  4118.  
  4119.             });
  4120.  
  4121.           }
  4122.  
  4123.           mclp.flushActiveItems_ = function () {
  4124.             const cnt = this;
  4125.  
  4126.             if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  4127.  
  4128.             if (cnt.activeItems_.length === 0) {
  4129.               cnt.__intermediate_delay__ = null;
  4130.               return;
  4131.             }
  4132.  
  4133.             const cntData = ((cnt || 0).data || 0);
  4134.             if (cntData.maxItemsToDisplay944 === undefined) {
  4135.               cntData.maxItemsToDisplay944 = null;
  4136.               if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  4137.               cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  4138.             }
  4139.  
  4140.             // ignore previous __intermediate_delay__ and create a new one
  4141.             cnt.__intermediate_delay__ = new Promise(resolve => {
  4142.               cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  4143.                 if (rt === 1) {
  4144.                   resolve(1); // success, scroll to bottom
  4145.                   if (hasMoreMessageState === 1) {
  4146.                     hasMoreMessageState = 0;
  4147.                     const showMore = (cnt.$ || 0)['show-more'];
  4148.                     if (showMore) {
  4149.                       showMore.classList.remove('has-new-messages-miuzp');
  4150.                     }
  4151.                   }
  4152.                 }
  4153.                 else if (rt === 2) {
  4154.                   resolve(2); // success, trim
  4155.                   if (hasMoreMessageState === 0) {
  4156.                     hasMoreMessageState = 1;
  4157.                     const showMore = cnt.$['show-more'];
  4158.                     if (showMore) {
  4159.                       showMore.classList.add('has-new-messages-miuzp');
  4160.                     }
  4161.                   }
  4162.                 }
  4163.                 else resolve(-1); // skip
  4164.               }).catch(e => {
  4165.                 console.warn(e);
  4166.               });
  4167.             });
  4168.  
  4169.           }
  4170.           console.log("flushActiveItems_", "OK");
  4171.         } else {
  4172.           console.log("flushActiveItems_", "NG");
  4173.         }
  4174.  
  4175.         mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  4176.           try {
  4177.             if (mlg > 1e9) mlg = 9;
  4178.             const tid = ++mlg;
  4179.             const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  4180.             const runCond = () => this.canScrollToBottom_();
  4181.             if (!keepTrialCond()) return;
  4182.             if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  4183.             await new Promise(r => setTimeout(r, 80));
  4184.             if (!keepTrialCond()) return;
  4185.             if (runCond()) return this.flushActiveItems_() | 1;
  4186.             await new Promise(requestAnimationFrame);
  4187.             if (runCond()) return this.flushActiveItems_() | 1;
  4188.           } catch (e) {
  4189.             console.warn(e);
  4190.           }
  4191.         }
  4192.  
  4193.         if ((mclp.atBottomChanged_ || 0).length === 1) {
  4194.           // note: if the scrolling is too frequent, the show more visibility might get wrong.
  4195.  
  4196.           const sfi = fnIntegrity(mclp.atBottomChanged_);
  4197.           if (sfi === '1.73.37') {
  4198.             // https://www.youtube.com/s/desktop/e4d15d2c/jsbin/live_chat_polymer.vflset/live_chat_polymer.js
  4199.           } else if (sfi === '1.75.39') {
  4200.             // e.g. https://www.youtube.com/yts/jsbin/live_chat_polymer-vflCyWEBP/live_chat_polymer.js
  4201.           } else {
  4202.             assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.73.37'));
  4203.           }
  4204.  
  4205.           const querySelector = HTMLElement.prototype.querySelector;
  4206.           const U = (element) => ({
  4207.             querySelector: (selector) => querySelector.call(element, selector)
  4208.           });
  4209.  
  4210.           let qid = 0;
  4211.           mclp.atBottomChanged_ = function (a) {
  4212.             let tid = ++qid;
  4213.             let b = this;
  4214.             a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  4215.               if (tid !== qid) return;
  4216.               U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  4217.             }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  4218.               this.hideShowMoreAsync_ = null,
  4219.               U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  4220.           }
  4221.  
  4222.           console.log("atBottomChanged_", "OK");
  4223.         } else {
  4224.           console.log("atBottomChanged_", "NG");
  4225.         }
  4226.  
  4227.         if ((mclp.onScrollItems_ || 0).length === 1) {
  4228.  
  4229.           assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  4230.           mclp.onScrollItems66_ = mclp.onScrollItems_;
  4231.           mclp.onScrollItems77_ = async function (evt) {
  4232.             if (myw > 1e9) myw = 9;
  4233.             let tid = ++myw;
  4234.  
  4235.             await new Promise(requestAnimationFrame);
  4236.  
  4237.             if (tid !== myw) {
  4238.               return;
  4239.             }
  4240.  
  4241.             const cnt = this;
  4242.  
  4243.             await Promise.resolve();
  4244.             if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  4245.               await Promise.resolve().then(() => {
  4246.                 this.ytRendererBehavior.onScroll(evt);
  4247.               }).then(() => {
  4248.                 if (this.canScrollToBottom_()) {
  4249.                   const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  4250.                   if (hasUserJustInteracted) {
  4251.                     // only when there is an user action
  4252.                     this.setAtBottom();
  4253.                     return 1;
  4254.                   }
  4255.                 } else {
  4256.                   // no message inserting
  4257.                   this.setAtBottom();
  4258.                   return 1;
  4259.                 }
  4260.               }).then((r) => {
  4261.  
  4262.                 if (this.activeItems_.length) {
  4263.  
  4264.                   if (this.canScrollToBottom_()) {
  4265.                     this.flushActiveItems_();
  4266.                     return 1 && r;
  4267.                   } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  4268.                     // delayed due to user action
  4269.                     this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  4270.                     return 0;
  4271.                   }
  4272.                 }
  4273.               }).then((r) => {
  4274.                 if (r) {
  4275.                   // ensure setAtBottom is correctly set
  4276.                   this.setAtBottom();
  4277.                 }
  4278.               });
  4279.             } else {
  4280.               cnt.onScrollItems66_(evt);
  4281.             }
  4282.  
  4283.             await Promise.resolve();
  4284.  
  4285.           }
  4286.  
  4287.           mclp.onScrollItems_ = function (evt) {
  4288.  
  4289.             const cnt = this;
  4290.             cnt.__intermediate_delay__ = new Promise(resolve => {
  4291.               cnt.onScrollItems77_(evt).then(() => {
  4292.                 resolve();
  4293.               });
  4294.             });
  4295.           }
  4296.           console.log("onScrollItems_", "OK");
  4297.         } else {
  4298.           console.log("onScrollItems_", "NG");
  4299.         }
  4300.  
  4301.         if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  4302.  
  4303.           const sfi = fnIntegrity(mclp.handleLiveChatActions_);
  4304.           if (sfi === '1.39.20') {
  4305.             // TBC
  4306.           } else if (sfi === '1.31.17') {
  4307.             // original
  4308.           } else {
  4309.             assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  4310.           }
  4311.  
  4312.           mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  4313.  
  4314.           mclp.handleLiveChatActions77_ = async function (arr) {
  4315.             if (typeof (arr || 0).length !== 'number') {
  4316.               this.handleLiveChatActions66_(arr);
  4317.               return;
  4318.             }
  4319.             if (mzt > 1e9) mzt = 9;
  4320.             let tid = ++mzt;
  4321.  
  4322.             if (zarr === null) zarr = arr;
  4323.             else Array.prototype.push.apply(zarr, arr);
  4324.             arr = null;
  4325.  
  4326.             await new Promise(requestAnimationFrame);
  4327.  
  4328.             if (tid !== mzt || zarr === null) {
  4329.               return;
  4330.             }
  4331.  
  4332.             const carr = zarr;
  4333.             zarr = null;
  4334.  
  4335.             await Promise.resolve();
  4336.             this.handleLiveChatActions66_(carr);
  4337.             await Promise.resolve();
  4338.  
  4339.           }
  4340.  
  4341.           mclp.handleLiveChatActions_ = function (arr) {
  4342.  
  4343.             const cnt = this;
  4344.             cnt.__intermediate_delay__ = new Promise(resolve => {
  4345.               cnt.handleLiveChatActions77_(arr).then(() => {
  4346.                 resolve();
  4347.               });
  4348.             });
  4349.           }
  4350.           console.log("handleLiveChatActions_", "OK");
  4351.         } else {
  4352.           console.log("handleLiveChatActions_", "NG");
  4353.         }
  4354.  
  4355.         mclp.hasUserJustInteracted11_ = () => {
  4356.           const t = dateNow();
  4357.           return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  4358.         }
  4359.  
  4360.         if ((mclp.canScrollToBottom_ || 0).length === 0) {
  4361.  
  4362.           assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  4363.  
  4364.           mclp.canScrollToBottom_ = function () {
  4365.             return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  4366.           }
  4367.  
  4368.           console.log("canScrollToBottom_", "OK");
  4369.         } else {
  4370.           console.log("canScrollToBottom_", "NG");
  4371.         }
  4372.  
  4373.         if (ENABLE_NO_SMOOTH_TRANSFORM) {
  4374.  
  4375.           mclp.isSmoothScrollEnabled_ = function () {
  4376.             return false;
  4377.           }
  4378.  
  4379.           mclp.maybeResizeScrollContainer_ = function () {
  4380.             //
  4381.           }
  4382.  
  4383.           mclp.refreshOffsetContainerHeight_ = function () {
  4384.             //
  4385.           }
  4386.  
  4387.           mclp.smoothScroll_ = function () {
  4388.             //
  4389.           }
  4390.  
  4391.           mclp.resetSmoothScroll_ = function () {
  4392.             //
  4393.           }
  4394.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  4395.         } else {
  4396.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  4397.         }
  4398.  
  4399.         if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  4400.  
  4401.           mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  4402.           mclp.handleAddChatItemAction_ = function (a) {
  4403.             try {
  4404.               if (a && typeof a === 'object' && !('length' in a)) {
  4405.                 fixLiveChatItem(a.item, null);
  4406.                 console.assert(arguments[0] === a);
  4407.               }
  4408.             } catch (e) { console.warn(e) }
  4409.             return this.handleAddChatItemAction66_.apply(this, arguments);
  4410.           }
  4411.  
  4412.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  4413.         } else {
  4414.  
  4415.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  4416.         }
  4417.  
  4418.  
  4419.         if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  4420.  
  4421.           mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  4422.           mclp.handleReplaceChatItemAction_ = function (a) {
  4423.             try {
  4424.               if (a && typeof a === 'object' && !('length' in a)) {
  4425.                 fixLiveChatItem(a.replacementItem, null);
  4426.                 console.assert(arguments[0] === a);
  4427.               }
  4428.             } catch (e) { console.warn(e) }
  4429.             return this.handleReplaceChatItemAction66_.apply(this, arguments);
  4430.           }
  4431.  
  4432.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  4433.         } else {
  4434.  
  4435.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  4436.         }
  4437.  
  4438.         console.log("[End]");
  4439.         console.groupEnd();
  4440.  
  4441.       }).catch(console.warn);
  4442.  
  4443.  
  4444.       const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  4445.  
  4446.         let yd = (this.__dataHost || insp(this).__dataHost || 0).__data;
  4447.  
  4448.         if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  4449.  
  4450.           // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  4451.           let v = `${attrValue}`;
  4452.           // conside a ticker is 101px width
  4453.           // 1% = 1.01px
  4454.           // 0.2% = 0.202px
  4455.  
  4456.  
  4457.           const ratio1 = (yd.ratio * 100);
  4458.           if (ratio1 > -1) { // avoid NaN
  4459.  
  4460.             // countdownDurationMs
  4461.             // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  4462.             // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  4463.             // 150000 - 1%    <1% = 1.5s>
  4464.             // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  4465.             // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  4466.  
  4467.             // 99px * 5% = 4.95px
  4468.  
  4469.             // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  4470.  
  4471.  
  4472.             // 1% Duration
  4473.  
  4474.             let ratio2 = ratio1;
  4475.  
  4476.             const ydd = yd.data;
  4477.             if (ydd) {
  4478.  
  4479.               const d1 = ydd.durationSec;
  4480.               const d2 = ydd.fullDurationSec;
  4481.  
  4482.               // @ step timing [min. 0.2%]
  4483.               let numOfSteps = 500;
  4484.               if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  4485.                 if (d2 > 400) numOfSteps = 500; // 0.2%
  4486.                 else if (d2 > 200) numOfSteps = 200; // 0.5%
  4487.                 else if (d2 > 100) numOfSteps = 100; // 1%
  4488.                 else if (d2 > 50) numOfSteps = 50; // 2%
  4489.                 else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  4490.                 else numOfSteps = 20;
  4491.               }
  4492.               if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  4493.               if (numOfSteps < 5) numOfSteps = 5;
  4494.  
  4495.               const rd = numOfSteps / 100.0;
  4496.  
  4497.               ratio2 = Math.round(ratio2 * rd) / rd;
  4498.  
  4499.               // ratio2 = Math.round(ratio2 * 5) / 5;
  4500.               ratio2 = ratio2.toFixed(1);
  4501.               v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  4502.  
  4503.               if (yd.__style_last__ === v) return;
  4504.               yd.__style_last__ = v;
  4505.               // do not consider any delay here.
  4506.               // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  4507.  
  4508.             }
  4509.           }
  4510.  
  4511.           HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  4512.  
  4513.  
  4514.         } else {
  4515.           HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  4516.         }
  4517.  
  4518.       };
  4519.  
  4520.  
  4521.       const fpTicker = (renderer) => {
  4522.         const cnt = insp(renderer);
  4523.         assertor(() => typeof (cnt || 0).is === 'string');
  4524.         assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  4525.         const container = (cnt.$ || 0).container;
  4526.         if (container) {
  4527.           assertor(() => (container || 0).nodeType === 1);
  4528.           assertor(() => typeof container.setAttribute === 'function');
  4529.           container.setAttribute = tickerContainerSetAttribute;
  4530.         } else {
  4531.           console.warn(`"container" does not exist in ${cnt.is}`);
  4532.         }
  4533.       };
  4534.  
  4535.  
  4536.       const tags = [
  4537.         "yt-live-chat-ticker-paid-message-item-renderer",
  4538.         "yt-live-chat-ticker-paid-sticker-item-renderer",
  4539.         "yt-live-chat-ticker-renderer",
  4540.         "yt-live-chat-ticker-sponsor-item-renderer"
  4541.       ];
  4542.  
  4543.  
  4544.       Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  4545.  
  4546.         mightFirstCheckOnYtInit();
  4547.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  4548.         console.log("[Begin]");
  4549.  
  4550.         let dummyValueForStyleReturn = null;
  4551.  
  4552.         const genDummyValueForStyleReturn = () => {
  4553.           let s = `--nx:82;`
  4554.           let ro = {
  4555.             "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4556.             "implementsGoogStringTypedString": true
  4557.           };
  4558.           ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4559.           return ro;
  4560.         }
  4561.  
  4562.         let isCSSPropertySupported_ = null;
  4563.         const isCSSPropertySupported = () => {
  4564.  
  4565.           // @property --ticker-rtime
  4566.  
  4567.           if (typeof isCSSPropertySupported_ === 'boolean') return isCSSPropertySupported_;
  4568.           isCSSPropertySupported_ = false;
  4569.  
  4570.           if (typeof CSS !== 'object' || typeof (CSS || 0).registerProperty !== 'function') return false;
  4571.           const documentElement = document.documentElement;
  4572.           if (!documentElement) {
  4573.             console.warn('document.documentElement is not found');
  4574.             return false;
  4575.           }
  4576.           if (`${getComputedStyle(documentElement).getPropertyValue('--ticker-rtime')}`.length === 0) {
  4577.             return false;
  4578.           }
  4579.  
  4580.           const ae = animate.call(documentElement,
  4581.             [
  4582.               { '--ticker-rtime': '70%' },
  4583.               { '--ticker-rtime': '30%' }
  4584.             ],
  4585.             {
  4586.               fill: "forwards",
  4587.               duration: 1000 * 40,
  4588.               easing: 'linear'
  4589.             }
  4590.           );
  4591.  
  4592.           let animatedValue = getComputedStyle(document.documentElement).getPropertyValue('--ticker-rtime');
  4593.           ae.finish();
  4594.           if (`${animatedValue}`.length !== 3) return false;
  4595.  
  4596.           isCSSPropertySupported_ = true;
  4597.           return true;
  4598.  
  4599.         };
  4600.  
  4601.  
  4602.         let windowShownAt = -1;
  4603.         const setupEventForWindowShownAt = () => {
  4604.           window.addEventListener('visibilitychange', () => {
  4605.             if (document.visibilityState === 'visible') windowShownAt = Date.now();
  4606.             else windowShownAt = 0;
  4607.           }, false);
  4608.         }
  4609.  
  4610.         const dProto = {
  4611.  
  4612.           attachedForTickerInit: function () {
  4613.  
  4614.             fpTicker(this.hostElement || this);
  4615.             return this.attached77();
  4616.  
  4617.           },
  4618.  
  4619.  
  4620.           // doAnimator
  4621.  
  4622.           _makeAnimator: function () {
  4623.             if (this._r782) return;
  4624.             // if (!this.isAttached) return;
  4625.             if (!this._runnerAE) {
  4626.               /** @type {HTMLElement | null} */
  4627.               const aElement = (this.$ || 0).container;
  4628.               if (!aElement) return console.warn("this.$.container is undefined");
  4629.               const da = this.data;
  4630.               if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  4631.               const c1 = this.colorFromDecimal(da.startBackgroundColor);
  4632.               const c2 = this.colorFromDecimal(da.endBackgroundColor);
  4633.               if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  4634.  
  4635.               // if (!this.__tickerBackgroundInitialChecked__) {
  4636.               //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  4637.               //   console.log('__tickerBackgroundInitialChecked__')
  4638.               //   this._checkTickerBackgroundChanged();
  4639.               // }
  4640.  
  4641.               aElement.style.setProperty('--ticker-c1', c1);
  4642.               aElement.style.setProperty('--ticker-c2', c2);
  4643.               aElement.classList.add(runTickerClassName);
  4644.               const p = (this.countdownMs / this.countdownDurationMs) * 100;
  4645.               // this._aeStartV = this.countdownMs;
  4646.               // this._aeStartT = this.countdownDurationMs;
  4647.               if (!(p >= 0 && p <= 100)) {
  4648.                 console.warn('incorrect time ratio', p);
  4649.               } else {
  4650.                 /*
  4651.                 const u0 = p.toFixed(4) + '%';
  4652.                 this._runnerAE = animate.call(aElement,
  4653.                   [
  4654.                     { '--ticker-rtime': u0 },
  4655.                     { '--ticker-rtime': '0%' }
  4656.                   ]
  4657.                   ,
  4658.                   {
  4659.                     fill: "forwards",
  4660.                     duration: this.countdownMs,
  4661.                     easing: "linear"
  4662.                   }
  4663.                 );
  4664.                 */
  4665.  
  4666.                 let timingFn = 'linear';
  4667.  
  4668.                 const totalDuration = this.countdownDurationMs;
  4669.  
  4670.                 if (ATTEMPT_ANIMATED_TICKER_BACKGROUND === 'steps') {
  4671.  
  4672.                   // @ step timing [min. 0.2%]
  4673.                   let stepInterval = 0.2; // unit: %
  4674.                   if (totalDuration > 400000) stepInterval = 0.2;
  4675.                   else if (totalDuration > 200000) stepInterval = 0.5;
  4676.                   else if (totalDuration > 100000) stepInterval = 1;
  4677.                   else if (totalDuration > 50000) stepInterval = 2;
  4678.                   else if (totalDuration > 25000) stepInterval = 5;
  4679.                   else stepInterval = 5;
  4680.  
  4681.                   let numOfSteps = Math.round(100 / stepInterval);
  4682.  
  4683.                   if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  4684.                   if (numOfSteps < 5) numOfSteps = 5;
  4685.  
  4686.                   timingFn = `steps(${numOfSteps}, end)`;
  4687.  
  4688.                 }
  4689.  
  4690.  
  4691.                 /** @type {Animation} */
  4692.                 const ae = animate.call(aElement,
  4693.                   [
  4694.                     { '--ticker-rtime': '100%' },
  4695.                     { '--ticker-rtime': '0%' }
  4696.                   ]
  4697.                   ,
  4698.                   {
  4699.                     fill: "forwards",
  4700.                     duration: totalDuration,
  4701.                     easing: timingFn
  4702.                   }
  4703.                 );
  4704.  
  4705.                 this._runnerAE = ae;
  4706.  
  4707.                 ae.onfinish = (event) => {
  4708.                   this.onfinish = null;
  4709.                   if (this._runnerAE !== ae) return;
  4710.                   if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  4711.                     this._aeFinished(event);
  4712.                   }
  4713.                 }
  4714.  
  4715.                 let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  4716.  
  4717.                 if (bq >= 0 && bq <= totalDuration) {
  4718.  
  4719.                   if (bq > totalDuration - 1) {
  4720.                     ae.currentTime = bq;
  4721.                     // setTimeout(() => {
  4722.                     //   if (this._runnerAE === ae && ae.onfinish) ae.onfinish();
  4723.                     // }, 1);
  4724.                   } else {
  4725.                     ae.currentTime = bq;
  4726.                   }
  4727.                 } else {
  4728.                   console.warn('Error on setting _runnerAE.currentTime!');
  4729.                 }
  4730.  
  4731.  
  4732.                 aeConstructor = ae.constructor; // constructor is from iframe
  4733.                 return ae;
  4734.               }
  4735.             } else {
  4736.               if (!aeConstructor) return console.warn('aeConstructor is undefined');
  4737.               // assume just time update
  4738.               const ae = this._runnerAE;
  4739.               if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  4740.               if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  4741.               let p = (this.countdownMs / this.countdownDurationMs) * 100;
  4742.               if (!(p >= 0 && p <= 100)) {
  4743.                 console.warn('incorrect time ratio', p);
  4744.               } else {
  4745.                 // let u0 = p.toFixed(4) + '%'
  4746.                 /*
  4747.                 ae.effect.setKeyframes([
  4748.                   { '--ticker-rtime': u0 },
  4749.                   { '--ticker-rtime': '0%' }
  4750.                 ]);
  4751.                 ae.effect.updateTiming({ duration: this.countdownMs });
  4752.                 */
  4753.                 // ae.currentTime = 0;
  4754.  
  4755.  
  4756.  
  4757.                 let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  4758.                 if (bq >= 0 && bq <= this.countdownDurationMs) {
  4759.  
  4760.                   this._runnerAE.currentTime = bq
  4761.                 } else {
  4762.                   console.warn('Error on setting _runnerAE.currentTime!');
  4763.                 }
  4764.  
  4765.  
  4766.                 ae.play();
  4767.                 return ae;
  4768.               }
  4769.             }
  4770.           },
  4771.  
  4772.           _aeFinished: function (event) {
  4773.  
  4774.             if (this._r782) return;
  4775.  
  4776.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4777.               this._throwOut();
  4778.               return;
  4779.             }
  4780.  
  4781.             if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4782.  
  4783.             let lc = window.performance.now();
  4784.             this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4785.             if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4786.             this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = lc;
  4787.             if (this.countdownMs > 76) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs, this, event); // just warning.
  4788.  
  4789.             this.countdownMs = 0;
  4790.             this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null;
  4791.  
  4792.             if (this.isAttached) {
  4793.               let fastRemoved = false;
  4794.               if (Date.now() - windowShownAt < 80 && typeof this.requestRemoval === 'function') {
  4795.                 // no animation if the video page is switched from background to foreground
  4796.                 // this.hostElement.style.display = 'none';
  4797.                 const id = (this.data || 0).id || 0;
  4798.                 if (!id) this.data = { id: 1 }
  4799.                 try {
  4800.                   this.requestRemoval();
  4801.                   fastRemoved = true;
  4802.                 } catch (e) {
  4803.  
  4804.                 }
  4805.               }
  4806.  
  4807.               if (!fastRemoved) {
  4808.                 "auto" === this.hostElement.style.width && this.setContainerWidth();
  4809.                 this.slideDown();
  4810.               }
  4811.             }
  4812.  
  4813.  
  4814.  
  4815.           },
  4816.  
  4817.  
  4818.           /** @type {()} */
  4819.           _throwOut: function () {
  4820.             this._r782 = 1;
  4821.             Promise.resolve().then(() => {
  4822.               if (typeof this.requestRemoval === 'function') {
  4823.                 const id = (this.data || 0).id;
  4824.                 if (!id) this.data = { id: 1 };
  4825.                 try {
  4826.                   this.requestRemoval();
  4827.                 } catch (e) { }
  4828.               }
  4829.               this.detached();
  4830.               if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  4831.               if (this.__dataEnabled === true) this.__dataEnabled = false;
  4832.               if (this.__dataReady === true) this.__dataReady = false;
  4833.               this.data = null;
  4834.               this.countdownMs = 0;
  4835.               this.lastCountdownTimeMs = null;
  4836.               const hm = this.hostElement || this;
  4837.               if (hm.parentNode) hm.remove();
  4838.               for (let t; t = hm.firstChild;) t.remove();
  4839.             }).catch(e => {
  4840.               console.warn(e);
  4841.             });
  4842.           },
  4843.  
  4844.  
  4845.           // doTimerFnModification
  4846.  
  4847.  
  4848.           /** @type {(a, b)} */
  4849.           startCountdownForTimerFnModA: function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4850.             try {
  4851.               // a.durationSec [s] => countdownMs [ms]
  4852.               // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4853.               // lastCountdownTimeMs => raf ongoing
  4854.               // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4855.  
  4856.               if (this._r782) return;
  4857.  
  4858.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4859.                 this._throwOut();
  4860.                 return;
  4861.               }
  4862.  
  4863.               // TimerFnModA
  4864.  
  4865.               b = void 0 === b ? 0 : b;
  4866.               if (void 0 !== a) {
  4867.  
  4868.                 this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4869.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4870.                 if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4871.                   this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = performance.now()
  4872.                   this.rafId = 1
  4873.                   if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4874.                   this.detlaSincePausedSecs = 0;
  4875.                   const ae = this._makeAnimator();
  4876.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4877.  
  4878.                   // if (playerProgressChangedArg1 === null) {
  4879.                   //   console.log('startCountdownForTimerFnModA', this.data)
  4880.                   // }
  4881.  
  4882.                   if (isPlayProgressTriggered && this.isAnimationPaused !== true && this.__ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED__) {
  4883.  
  4884.  
  4885.  
  4886.  
  4887.                     this.playerProgressSec = lastPlayerProgress > 0 ? lastPlayerProgress : 0; // save the progress first
  4888.                     this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4889.                     this.detlaSincePausedSecs = 0;
  4890.                     this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4891.  
  4892.                     relayPromise = relayPromise || new PromiseExternal();
  4893.  
  4894.                     relayPromise.then(() => {
  4895.                       if (this.isAttached === true && this.countdownDurationMs > 0 && this.isAnimationPaused === true && this.isReplayPaused !== true) {
  4896.                         this.isAnimationPaused = false;
  4897.                       }
  4898.                     });
  4899.  
  4900.  
  4901.                   }
  4902.  
  4903.  
  4904.  
  4905.                 }
  4906.               }
  4907.  
  4908.             } catch (e) {
  4909.               console.warn(e);
  4910.             }
  4911.  
  4912.           },
  4913.  
  4914.  
  4915.  
  4916.           /** @type {(a, b)} */
  4917.           startCountdownForTimerFnModT: function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4918.             try {
  4919.               // a.durationSec [s] => countdownMs [ms]
  4920.               // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4921.               // lastCountdownTimeMs => raf ongoing
  4922.               // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4923.  
  4924.               if (this._r782) return;
  4925.  
  4926.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4927.                 this._throwOut();
  4928.                 return;
  4929.               }
  4930.  
  4931.               // TimerFnModT
  4932.  
  4933.               // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4934.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4935.               b = void 0 === b ? 0 : b;
  4936.               void 0 !== a && (this.countdownMs = 1E3 * a,
  4937.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4938.                 this.ratio = 1,
  4939.                 this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = performance.now(),
  4940.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4941.  
  4942.             } catch (e) {
  4943.               console.warn(e);
  4944.             }
  4945.  
  4946.           },
  4947.  
  4948.  
  4949.           /** @type {(a,)} */
  4950.           updateTimeoutForTimerFnModA: function (a) {
  4951.  
  4952.             try {
  4953.  
  4954.               // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  4955.  
  4956.               if (this._r782) return;
  4957.  
  4958.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4959.                 this._throwOut();
  4960.                 return;
  4961.               }
  4962.  
  4963.               // TimerFnModA
  4964.  
  4965.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4966.               if (this.lastCountdownTimeMs !== this._lastCountdownTimeMsX0) {
  4967.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4968.               }
  4969.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4970.               if (this.isAttached && this.countdownMs) {
  4971.                 this.lastCountdownTimeMs = a
  4972.                 const ae = this._makeAnimator(); // request raf
  4973.                 if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4974.               } else {
  4975.                 (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null,
  4976.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4977.                     this.slideDown()));
  4978.               }
  4979.  
  4980.             } catch (e) {
  4981.               console.warn(e);
  4982.             }
  4983.  
  4984.  
  4985.           },
  4986.  
  4987.           /** @type {(a,)} */
  4988.           updateTimeoutForTimerFnModT: function (a) {
  4989.  
  4990.             try {
  4991.  
  4992.               // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  4993.  
  4994.               if (this._r782) return;
  4995.  
  4996.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4997.                 this._throwOut();
  4998.                 return;
  4999.               }
  5000.  
  5001.               // TimerFnModT
  5002.  
  5003.               // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  5004.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  5005.               if (this.lastCountdownTimeMs !== this._lastCountdownTimeMsX0) {
  5006.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  5007.               }
  5008.               // console.log(703, this.countdownMs)
  5009.               this.ratio = this.countdownMs / this.countdownDurationMs;
  5010.               this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  5011.                 this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null,
  5012.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  5013.                     this.slideDown()))
  5014.  
  5015.  
  5016.             } catch (e) {
  5017.               console.warn(e);
  5018.             }
  5019.           },
  5020.  
  5021.           /** @type {(a,b)} */
  5022.           isAnimationPausedChangedForTimerFnModA: function (a, b) {
  5023.  
  5024.             if (this._r782) return;
  5025.  
  5026.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  5027.               this._throwOut();
  5028.               return;
  5029.             }
  5030.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  5031.             this._forceNoDetlaSincePausedSecs783 = 0;
  5032.  
  5033.             Promise.resolve().then(() => {
  5034.  
  5035.               if (a) {
  5036.  
  5037.                 if (this._runnerAE && this._runnerAE.playState === 'running') {
  5038.  
  5039.                   this._runnerAE.pause()
  5040.                   let lc = window.performance.now();
  5041.                   this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  5042.                   if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  5043.                   this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = lc;
  5044.                 }
  5045.  
  5046.               } else if (!a && b) {
  5047.  
  5048.  
  5049.                 if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  5050.                 a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  5051.                 this.detlaSincePausedSecs = 0;
  5052.                 this.updateTimeout(a);
  5053.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = window.performance.now();
  5054.  
  5055.               }
  5056.  
  5057.  
  5058.             }).catch(e => {
  5059.               console.log(e);
  5060.             });
  5061.  
  5062.  
  5063.  
  5064.           },
  5065.  
  5066.  
  5067.           /** @type {(a,b)} */
  5068.           isAnimationPausedChangedForTimerFnModT: function (a, b) {
  5069.  
  5070.             if (this._r782) return;
  5071.  
  5072.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  5073.               this._throwOut();
  5074.               return;
  5075.             }
  5076.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  5077.             this._forceNoDetlaSincePausedSecs783 = 0;
  5078.  
  5079.             Promise.resolve().then(() => {
  5080.  
  5081.               // TimerFnModT
  5082.  
  5083.               // ez++;
  5084.               // if(ez> 1e9) ez=9;
  5085.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  5086.               a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  5087.                 this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  5088.                   this.detlaSincePausedSecs = 0),
  5089.                 this.boundUpdateTimeout37_(a),
  5090.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = window.performance.now())
  5091.  
  5092.  
  5093.             }).catch(e => {
  5094.               console.log(e);
  5095.             });
  5096.  
  5097.  
  5098.  
  5099.           },
  5100.  
  5101.  
  5102.           /** @type {(a,b)} */
  5103.           computeContainerStyleForAnimatorEnabled: function (a, b) {
  5104.  
  5105.             if (this._r782) return;
  5106.  
  5107.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  5108.               this._throwOut();
  5109.               return;
  5110.             }
  5111.  
  5112.             return (dummyValueForStyleReturn || (dummyValueForStyleReturn = genDummyValueForStyleReturn()));
  5113.  
  5114.           },
  5115.  
  5116.  
  5117.  
  5118.           /** @type {()} */
  5119.           handlePauseReplayForPlaybackProgressState: function () {
  5120.             if (!playerEventsByIframeRelay) return this.handlePauseReplay66.apply(this, arguments);
  5121.  
  5122.             if (onPlayStateChangePromise) {
  5123.  
  5124.               if (this.rtu > 1e9) this.rtu = this.rtu % 1e4;
  5125.               const tid = ++this.rtu;
  5126.  
  5127.               onPlayStateChangePromise.then(() => {
  5128.                 if (tid === this.rtu && !onPlayStateChangePromise) this.handlePauseReplay.apply(this, arguments);
  5129.               });
  5130.  
  5131.               return;
  5132.             }
  5133.  
  5134.             if (playerState !== 2) return;
  5135.             if (this.isAttached) {
  5136.               if (this.rtk > 1e9) this.rtk = this.rtk % 1e4;
  5137.               const tid = ++this.rtk;
  5138.               const tc = relayCount;
  5139.               foregroundPromiseFn().then(() => {
  5140.                 if (tid === this.rtk && tc === relayCount && playerState === 2 && _playerState === playerState) {
  5141.                   this.handlePauseReplay66();
  5142.                 }
  5143.  
  5144.               })
  5145.             }
  5146.           },
  5147.  
  5148.           /** @type {()} */
  5149.           handleResumeReplayForPlaybackProgressState: function () {
  5150.             if (!playerEventsByIframeRelay) return this.handleResumeReplay66.apply(this, arguments);
  5151.  
  5152.  
  5153.             if (onPlayStateChangePromise) {
  5154.  
  5155.               if (this.rtv > 1e9) this.rtv = this.rtv % 1e4;
  5156.               const tid = ++this.rtv;
  5157.  
  5158.               onPlayStateChangePromise.then(() => {
  5159.                 if (tid === this.rtv && !onPlayStateChangePromise) this.handleResumeReplay.apply(this, arguments);
  5160.               });
  5161.  
  5162.               return;
  5163.             }
  5164.  
  5165.  
  5166.             if (playerState !== 1) return;
  5167.             if (this.isAttached) {
  5168.               const tc = relayCount;
  5169.  
  5170.               relayPromise = relayPromise || new PromiseExternal();
  5171.               relayPromise.then(() => {
  5172.                 if (relayCount > tc && playerState === 1 && _playerState === playerState) {
  5173.                   this.handleResumeReplay66();
  5174.                 }
  5175.               });
  5176.             }
  5177.           },
  5178.  
  5179.           /** @type {(a,)} */
  5180.           handleReplayProgressForPlaybackProgressState: function (a) {
  5181.             if (this.isAttached) {
  5182.               const tid = ++this.rtk;
  5183.               foregroundPromiseFn().then(() => {
  5184.                 if (tid === this.rtk) {
  5185.                   this.handleReplayProgress66(a);
  5186.                 }
  5187.               })
  5188.             }
  5189.           }
  5190.  
  5191.  
  5192.         }
  5193.  
  5194.  
  5195.         for (const tag of tags) { // ##tag##
  5196.           const dummy = document.createElement(tag);
  5197.  
  5198.           const cProto = getProto(dummy);
  5199.           if (!cProto || !cProto.attached) {
  5200.             console.warn(`proto.attached for ${tag} is unavailable.`);
  5201.             continue;
  5202.           }
  5203.  
  5204.           cProto.attached77 = cProto.attached;
  5205.  
  5206.           cProto.attached = dProto.attachedForTickerInit;
  5207.  
  5208.           let rafHackState = 0;
  5209.  
  5210.           let isTimingFunctionHackable = false;
  5211.  
  5212.           let urt = 0;
  5213.  
  5214.           if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  5215.  
  5216.             // console.log('startCountdown', typeof cProto.startCountdown)
  5217.             // console.log('updateTimeout', typeof cProto.updateTimeout)
  5218.             // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  5219.  
  5220.             isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  5221.  
  5222.           } else {
  5223.             console.log(`Skip Timing Function Modification for ${tag}`);
  5224.             continue;
  5225.           }
  5226.  
  5227.  
  5228.           if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  5229.  
  5230.             // cancelable - this.rafId < isAnimationPausedChanged >
  5231.             rafHackState = 1;
  5232.  
  5233.             if (isTimingFunctionHackable) {
  5234.               rafHackState = 2;
  5235.  
  5236.             } else {
  5237.               rafHackState = 4;
  5238.             }
  5239.  
  5240.           }
  5241.  
  5242.           const doAnimator = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && isCSSPropertySupported();
  5243.  
  5244.           const doRAFHack = rafHackState === 2;
  5245.  
  5246.           cProto._throwOut = dProto._throwOut;
  5247.  
  5248.           cProto._makeAnimator = doAnimator ? dProto._makeAnimator : null;
  5249.  
  5250.           cProto._aeFinished = doAnimator ? dProto._aeFinished : null;
  5251.  
  5252.  
  5253.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  5254.  
  5255.  
  5256.  
  5257.             if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  5258.               urt++;
  5259.               assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  5260.             } else {
  5261.               console.log('Error for setting cProto.handlePauseReplay', tag)
  5262.             }
  5263.  
  5264.             if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  5265.               urt++;
  5266.               assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  5267.             } else {
  5268.               console.log('Error for setting cProto.handleResumeReplay', tag)
  5269.             }
  5270.  
  5271.             if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  5272.               urt++;
  5273.               assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  5274.             } else {
  5275.               console.log('Error for setting cProto.handleReplayProgress', tag)
  5276.             }
  5277.  
  5278.  
  5279.  
  5280.           }
  5281.  
  5282.           const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  5283.           cProto.__ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED__ = ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED;
  5284.  
  5285.           if (ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED) {
  5286.  
  5287.             cProto.rtk = 0;
  5288.             cProto.rtu = 0;
  5289.             cProto.rtv = 0;
  5290.  
  5291.             cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  5292.             cProto.handlePauseReplay = dProto.handlePauseReplayForPlaybackProgressState;
  5293.  
  5294.             cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  5295.             cProto.handleResumeReplay = dProto.handleResumeReplayForPlaybackProgressState;
  5296.  
  5297.             cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  5298.             cProto.handleReplayProgress = dProto.handleReplayProgressForPlaybackProgressState;
  5299.  
  5300.           }
  5301.  
  5302.           const doTimerFnModification = (doRAFHack || doAnimator);
  5303.  
  5304.           if (doAnimator && windowShownAt < 0) {
  5305.             windowShownAt = 0;
  5306.             setupEventForWindowShownAt();
  5307.           }
  5308.  
  5309.           if (doTimerFnModification) {
  5310.  
  5311.             cProto.startCountdown = (
  5312.               doAnimator ? dProto.startCountdownForTimerFnModA : dProto.startCountdownForTimerFnModT
  5313.             );
  5314.  
  5315.             // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  5316.             cProto.updateTimeout = (
  5317.               doAnimator ? dProto.updateTimeoutForTimerFnModA : dProto.updateTimeoutForTimerFnModT
  5318.             );
  5319.  
  5320.  
  5321.             // let ez = 0;
  5322.             cProto.isAnimationPausedChanged = (
  5323.               doAnimator ? dProto.isAnimationPausedChangedForTimerFnModA : dProto.isAnimationPausedChangedForTimerFnModT
  5324.             );
  5325.  
  5326.           }
  5327.  
  5328.           if (doAnimator) {
  5329.  
  5330.             const s = fnIntegrity(cProto.computeContainerStyle);
  5331.             // 2.44.29 or 2.81.31
  5332.             if (s === '2.44.29' || s === '2.81.31') {
  5333.  
  5334.               //     var ofb = da([""])
  5335.               //         pfb = da("background:linear-gradient(90deg, {,{ {,{ {,{);".split("{"))
  5336.  
  5337.               // f.computeContainerStyle = function(a, b) {
  5338.               //     if (!a)
  5339.               //         return pi(ofb);
  5340.               //     var c = this.colorFromDecimal(a.startBackgroundColor);
  5341.               //     a = this.colorFromDecimal(a.endBackgroundColor);
  5342.               //     b = 100 * b + "%";
  5343.               //     return pi(pfb, c, c, b, a, b, a)
  5344.               // }
  5345.  
  5346.             } else {
  5347.               assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.44.29'));
  5348.             }
  5349.  
  5350.             cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  5351.  
  5352.             cProto.computeContainerStyle = dProto.computeContainerStyleForAnimatorEnabled;
  5353.  
  5354.           }
  5355.  
  5356.           if (doTimerFnModification === true) hasTimerModified = true;
  5357.  
  5358.           if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  5359.             console.log('ATTEMPT_ANIMATED_TICKER_BACKGROUND', tag, doAnimator ? 'OK' : 'NG');
  5360.           }
  5361.  
  5362.           if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  5363.             console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  5364.           }
  5365.  
  5366.         }
  5367.  
  5368.         const selector = tags.join(', ');
  5369.         const elements = document.querySelectorAll(selector);
  5370.         if (elements.length >= 1) {
  5371.           for (const elm of elements) {
  5372.             if (insp(elm).isAttached === true) {
  5373.               fpTicker(elm);
  5374.             }
  5375.           }
  5376.         }
  5377.  
  5378.         console.log("[End]");
  5379.         console.groupEnd();
  5380.  
  5381.  
  5382.       }).catch(console.warn);
  5383.  
  5384.       customElements.whenDefined('yt-live-chat-ticker-renderer').then(() => {
  5385.  
  5386.         mightFirstCheckOnYtInit();
  5387.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-renderer hacks");
  5388.         console.log("[Begin]");
  5389.         (() => {
  5390.  
  5391.           /* pending!!
  5392.  
  5393.           handleLiveChatAction
  5394.  
  5395.           removeTickerItemById
  5396.  
  5397.           _itemsChanged
  5398.           itemsChanged
  5399.  
  5400.           handleMarkChatItemAsDeletedAction
  5401.           handleMarkChatItemsByAuthorAsDeletedAction
  5402.           handleRemoveChatItemByAuthorAction
  5403.  
  5404.  
  5405.           */
  5406.  
  5407.           const tag = "yt-live-chat-ticker-renderer"
  5408.           const dummy = document.createElement(tag);
  5409.  
  5410.           const cProto = getProto(dummy);
  5411.           if (!cProto || !cProto.attached) {
  5412.             console.warn(`proto.attached for ${tag} is unavailable.`);
  5413.             return;
  5414.           }
  5415.  
  5416.           if (AMEND_TICKER_handleLiveChatAction
  5417.             && typeof cProto.handleLiveChatAction === 'function' && !cProto.handleLiveChatAction45 && '|1.63.48|1.64.48|'.includes(`|${fnIntegrity(cProto.handleLiveChatAction)}|`)
  5418.             && typeof cProto.handleLiveChatActions === 'function' && !cProto.handleLiveChatActions45 && fnIntegrity(cProto.handleLiveChatActions) === '1.23.12'
  5419.             && typeof cProto.unshift === 'function' && cProto.unshift.length === 1
  5420.             && typeof cProto.handleMarkChatItemAsDeletedAction === 'function' && cProto.handleMarkChatItemAsDeletedAction.length === 1
  5421.             && typeof cProto.removeTickerItemById === 'function' && cProto.removeTickerItemById.length === 1
  5422.             && typeof cProto.handleMarkChatItemsByAuthorAsDeletedAction === 'function' && cProto.handleMarkChatItemsByAuthorAsDeletedAction.length === 1
  5423.             && typeof cProto.handleRemoveChatItemByAuthorAction === 'function' && cProto.handleRemoveChatItemByAuthorAction.length === 1
  5424.           ) {
  5425.  
  5426.             cProto.handleLiveChatActions45 = cProto.handleLiveChatActions;
  5427.  
  5428.             cProto.handleLiveChatActions = function (a) {
  5429.               /**
  5430.                *
  5431.                   f.handleLiveChatActions = function(a) {
  5432.                       a.length && (a.forEach(this.handleLiveChatAction, this),
  5433.                       this.updateHighlightedItem(),
  5434.                       this.shouldAnimateIn = !0)
  5435.                   }
  5436.                *
  5437.                */
  5438.  
  5439.               if (a.length) {
  5440.                 const batchToken = String.fromCharCode(Date.now() % 26 + 97) + Math.floor(Math.random() * 19861 + 19861).toString(36);
  5441.                 const len = a.length;
  5442.                 if (FIX_BATCH_TICKER_ORDER && len >= 2) {
  5443.                   // Primarily for the initial batch, this is due to replayBuffer._back.
  5444.                   const entries = [];
  5445.                   const entriesI = [];
  5446.                   for (let i = 0; i < len; i++) {
  5447.                     const item = ((a[i] || 0).addLiveChatTickerItemAction || 0).item || 0;
  5448.                     if (item) {
  5449.                       const itemRendererKey = firstObjectKey(item);
  5450.                       const itemRenderer = item[itemRendererKey];
  5451.                       if (itemRenderer) {
  5452.                         let timestampUsec = getTimestampUsec(itemRenderer);
  5453.                         if (timestampUsec !== null) {
  5454.                           timestampUsec = parseInt(timestampUsec);
  5455.                           if (timestampUsec > 0) {
  5456.                             entriesI.push(i);
  5457.                             entries.push({ e: a[i], timestampUsec })
  5458.                           }
  5459.                         }
  5460.                       }
  5461.                     }
  5462.                   }
  5463.                   const mLen = entries.length;
  5464.                   if (mLen >= 2) {
  5465.                     entries.sort((a, b) => {
  5466.                       const diff = a.timestampUsec - b.timestampUsec;
  5467.                       return diff > 0.1 ? 1 : diff < -0.1 ? -1 : 0;
  5468.                     });
  5469.                     for (let j = 0; j < mLen; j++) {
  5470.                       const i = entriesI[j];
  5471.                       a[i] = entries[j].e;
  5472.                     }
  5473.                   }
  5474.                   entries.length = 0;
  5475.                   entriesI.length = 0;
  5476.                 }
  5477.                 for (const action of a) {
  5478.                   action.__batchId45__ = batchToken;
  5479.                   this.handleLiveChatAction(action);
  5480.                 }
  5481.               }
  5482.             }
  5483.  
  5484.             cProto.handleLiveChatAction45 = cProto.handleLiveChatAction;
  5485.  
  5486.  
  5487.  
  5488.             cProto._nszlv_ = 0;
  5489.             cProto._stackedLCAs_ = null;
  5490.             cProto._lastAddItem_ = null;
  5491.             cProto._lastAddItemInStack_ = false;
  5492.             cProto.handleLiveChatAction = function (a) {
  5493.  
  5494.  
  5495.               /**
  5496.                *
  5497.                *
  5498.                 f.handleLiveChatAction = function(a) {
  5499.                     var b = C(a, xO)
  5500.                       , c = C(a, yO)
  5501.                       , d = C(a, o1a)
  5502.                       , e = C(a, p1a);
  5503.                     a = C(a, A1a);
  5504.                     b ? this.unshift("items", b.item) : c ? this.handleMarkChatItemAsDeletedAction(c) : d ? this.removeTickerItemById(d.targetItemId) : e ? this.handleMarkChatItemsByAuthorAsDeletedAction(e) : a && this.handleRemoveChatItemByAuthorAction(a)
  5505.                 }
  5506.                *
  5507.                */
  5508.  
  5509.               // return this.handleLiveChatAction45(a)
  5510.               const { addChatItemAction, addLiveChatTickerItemAction, markChatItemAsDeletedAction,
  5511.                 removeChatItemAction, markChatItemsByAuthorAsDeletedAction, removeChatItemByAuthorAction, __batchId45__ } = a
  5512.  
  5513.               if (addChatItemAction) return;
  5514.  
  5515.  
  5516.               const d = Date.now();
  5517.  
  5518.  
  5519.               // console.log(Object.keys(a));
  5520.  
  5521.               if (this._stackedLCAs_ === null) this._stackedLCAs_ = [];
  5522.               const stackArr = this._stackedLCAs_;
  5523.               let newStackEntry = null;
  5524.               if (addLiveChatTickerItemAction) {
  5525.                 let isDuplicated = false;
  5526.  
  5527.                 const newItem = addLiveChatTickerItemAction.item;
  5528.                 const tickerType = firstObjectKey(newItem);
  5529.                 if (!tickerType) return;
  5530.                 const tickerItem = newItem[tickerType];
  5531.                 const tickerId = tickerItem.id;
  5532.                 if (!tickerId) return;
  5533.  
  5534.                 if (this._lastAddItem_ && this._lastAddItem_.id === tickerId) {
  5535.                   let prevTickerItem = null;
  5536.                   if (this._lastAddItemInStack_) {
  5537.                     const entry = stackArr[stackArr.length - 1]; // only consider the last entry
  5538.                     if (entry && entry.action === 'addItem') {
  5539.                       prevTickerItem = entry.data; // only consider the first item;
  5540.                     }
  5541.                   } else {
  5542.                     prevTickerItem = this.items[0]; // only consider the first item;
  5543.                   }
  5544.                   if (prevTickerItem && prevTickerItem[tickerType]) {
  5545.                     if (prevTickerItem[tickerType].id === tickerId) {
  5546.                       isDuplicated = true;
  5547.                     }
  5548.                   }
  5549.                 }
  5550.                 if (!isDuplicated) {
  5551.                   this._lastAddItem_ = tickerItem;
  5552.                   this._lastAddItemInStack_ = true;
  5553.                   // console.log('newItem', newItem)
  5554.  
  5555.                   const item = newItem;
  5556.                   const key = firstObjectKey(item);
  5557.                   if (key) {
  5558.                     const itemRenderer = item[key] || 0;
  5559.                     if (itemRenderer.fullDurationSec > 0) {
  5560.                       itemRenderer.__actionAt__ = d;
  5561.                     }
  5562.                   }
  5563.  
  5564.  
  5565.                   newStackEntry = { action: 'addItem', data: newItem };
  5566.  
  5567.                 } else {
  5568.                   console.log('handleLiveChatAction Repeated Item', tickerItem.id, tickerItem); // happen in both live and playback. Reason Unknown.
  5569.                   return;
  5570.                 }
  5571.  
  5572.               } else {
  5573.                 markChatItemAsDeletedAction && (newStackEntry = { action: 'mcItemD', data: markChatItemAsDeletedAction });
  5574.                 removeChatItemAction && (newStackEntry = { action: 'removeItemById', data: removeChatItemAction.targetId });
  5575.                 markChatItemsByAuthorAsDeletedAction && (newStackEntry = { action: 'mcItemAD', data: markChatItemsByAuthorAsDeletedAction });
  5576.                 removeChatItemByAuthorAction && (newStackEntry = { action: 'removeItemA', data: removeChatItemByAuthorAction })
  5577.               }
  5578.  
  5579.  
  5580.               if (!newStackEntry) return;
  5581.               stackArr.push(newStackEntry);
  5582.  
  5583.  
  5584.               this._nszlv_++;
  5585.               if (this._nszlv_ > 1e9) this._nszlv_ = 9;
  5586.               const tid = this._nszlv_;
  5587.  
  5588.               newStackEntry.__batchId45__ = __batchId45__ || '';
  5589.               newStackEntry.dateTime = Date.now();
  5590.  
  5591.  
  5592.               foregroundPromiseFn().then(() => {
  5593.  
  5594.                 if (tid !== this._nszlv_) return;
  5595.                 const dateNow = Date.now(); // time difference to shift animation start time shall be considered. (pending)
  5596.                 const stackArr = this._stackedLCAs_.slice(0);
  5597.                 this._stackedLCAs_.length = 0;
  5598.                 this._lastAddItemInStack_ = false;
  5599.                 let lastDateTime = 0;
  5600.                 let prevBatchId = '';
  5601.                 const addItems = [];
  5602.                 // const previousShouldAnimateIn = this.shouldAnimateIn;
  5603.  
  5604.                 const addItemsFx = () => {
  5605.  
  5606.                   if (addItems.length >= 1) {
  5607.                     const eArr = addItems.slice(0);
  5608.                     addItems.length = 0;
  5609.                     if (ADJUST_TICKER_DURATION_ALIGN_RENDER_TIME) {
  5610.  
  5611.                       const arr = []; // size of arr <= size of eArr
  5612.                       const d = Date.now();
  5613.                       for (const item of eArr) {
  5614.                         const key = firstObjectKey(item);
  5615.                         if (key) {
  5616.  
  5617.  
  5618.                           const itemRenderer = item[key] || 0;
  5619.                           const { durationSec, fullDurationSec, __actionAt__ } = itemRenderer;
  5620.                           if (__actionAt__ > 0 && durationSec > 0 && fullDurationSec > 0) {
  5621.  
  5622.  
  5623.                             const offset = d - __actionAt__;
  5624.                             if (offset > 0 && typeof durationSec === 'number' && typeof fullDurationSec === 'number' && fullDurationSec >= durationSec) {
  5625.                               const adjustedDurationSec = durationSec - Math.floor(offset / 1000);
  5626.                               if (adjustedDurationSec < durationSec) { // prevent NaN
  5627.                                 // console.log('adjustedDurationSec', adjustedDurationSec);
  5628.                                 if (adjustedDurationSec > 0) {
  5629.                                   // console.log('offset Sec', Math.floor(offset / 1000));
  5630.                                   itemRenderer.durationSec = adjustedDurationSec;
  5631.                                 } else {
  5632.                                   // if adjustedDurationSec equal 0 or invalid
  5633.                                   continue; // skip adding
  5634.                                 }
  5635.                               }
  5636.  
  5637.                             }
  5638.  
  5639.                           }
  5640.  
  5641.                           if (fullDurationSec > 0 && durationSec < 1) continue; // fallback check
  5642.  
  5643.  
  5644.  
  5645.                         }
  5646.                         arr.push(item)
  5647.                         // arr.unshift(item);
  5648.                       }
  5649.  
  5650.  
  5651.                       // console.log(arr.slice(0))
  5652.                       this.unshift("items", ...arr);
  5653.                     } else {
  5654.                       this.unshift("items", ...eArr);
  5655.                     }
  5656.                   }
  5657.                 }
  5658.  
  5659.                 for (const entry of stackArr) {
  5660.  
  5661.                   const { action, data, dateTime, __batchId45__ } = entry;
  5662.  
  5663.                   const finishLastAction = (
  5664.                     (prevBatchId !== __batchId45__ && prevBatchId)
  5665.                     || (dateNow - lastDateTime >= 1000 && dateNow - dateTime < 1000)
  5666.                   );
  5667.  
  5668.                   const addPrevItems = addItems.length >= 1 && (finishLastAction || action !== 'addItem');
  5669.                   lastDateTime = dateTime;
  5670.                   prevBatchId = __batchId45__;
  5671.  
  5672.                   // if (dateNow - dateTime >= 1000 && this.shouldAnimateIn) this.shouldAnimateIn = false;
  5673.  
  5674.  
  5675.                   if (addPrevItems) {
  5676.                     addItemsFx();
  5677.                   }
  5678.                   // if (finishLastAction) {
  5679.                   //   this.updateHighlightedItem();
  5680.                   //   if (!this.shouldAnimateIn) this.shouldAnimateIn = true;
  5681.                   // }
  5682.  
  5683.  
  5684.                   if (action === 'addItem') addItems.unshift(data);
  5685.                   else if (action === 'mcItemD') this.handleMarkChatItemAsDeletedAction(data);
  5686.                   else if (action === 'removeItemById') this.removeTickerItemById(data);
  5687.                   else if (action === 'mcItemAD') this.handleMarkChatItemsByAuthorAsDeletedAction(data);
  5688.                   else if (action === 'removeItemA') this.handleRemoveChatItemByAuthorAction(data);
  5689.  
  5690.                 }
  5691.  
  5692.  
  5693.                 // if (previousShouldAnimateIn && !this.shouldAnimateIn) this.shouldAnimateIn = true;
  5694.  
  5695.                 addItemsFx();
  5696.  
  5697.                 // if (prevBatchId || dateNow - lastDateTime >= 1000) {
  5698.                 //   this.updateHighlightedItem();
  5699.                 //   if (!this.shouldAnimateIn) this.shouldAnimateIn = true;
  5700.                 // }
  5701.  
  5702.               })
  5703.  
  5704.             }
  5705.  
  5706.             console.log("AMEND_TICKER_handleLiveChatAction - OK");
  5707.           } else {
  5708.             console.log("AMEND_TICKER_handleLiveChatAction - NG");
  5709.           }
  5710.  
  5711.           if (RAF_FIX_keepScrollClamped) {
  5712.  
  5713.             // to be improved
  5714.  
  5715.             if (typeof cProto.keepScrollClamped === 'function' && !cProto.keepScrollClamped72 && fnIntegrity(cProto.keepScrollClamped) === '0.17.10') {
  5716.  
  5717.               cProto.keepScrollClamped72 = cProto.keepScrollClamped;
  5718.               cProto.keepScrollClamped = function () {
  5719.                 this._bound_keepScrollClamped = this._bound_keepScrollClamped || this.keepScrollClamped.bind(this);
  5720.                 this.scrollClampRaf = requestAnimationFrame(this._bound_keepScrollClamped);
  5721.                 this.maybeClampScroll()
  5722.               }
  5723.  
  5724.               console.log('RAF_FIX: keepScrollClamped', tag, "OK")
  5725.             } else {
  5726.  
  5727.               assertor(() => fnIntegrity(cProto.keepScrollClamped, '0.17.10'));
  5728.               console.log('RAF_FIX: keepScrollClamped', tag, "NG")
  5729.             }
  5730.  
  5731.           }
  5732.  
  5733.  
  5734.           if (RAF_FIX_scrollIncrementally && typeof cProto.startScrolling === 'function' && typeof cProto.scrollIncrementally === 'function' && fnIntegrity(cProto.startScrolling) === '1.43.31' && fnIntegrity(cProto.scrollIncrementally) === '1.82.43') {
  5735.             // to be replaced by animator
  5736.  
  5737.             cProto.startScrolling = function (a) {
  5738.               this.scrollStopHandle && this.cancelAsync(this.scrollStopHandle);
  5739.               this.asyncHandle && cancelAnimationFrame(this.asyncHandle);
  5740.               this.lastFrameTimestamp = this.scrollStartTime = performance.now();
  5741.               this.scrollRatePixelsPerSecond = a;
  5742.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  5743.               this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally)
  5744.             };
  5745.  
  5746.             // related functions: startScrollBack, startScrollingLeft, startScrollingRight, etc.
  5747.  
  5748.             cProto.scrollIncrementally = (RAF_FIX_scrollIncrementally === 2) ? function (a) {
  5749.               const b = a - (this.lastFrameTimestamp || 0);
  5750.               const rate = this.scrollRatePixelsPerSecond
  5751.               const q = b / 1E3 * (rate || 0);
  5752.  
  5753.               const sl = this.$.items.scrollLeft;
  5754.               // console.log(rate, sl, q)
  5755.               if (this.lastFrameTimestamp == this.scrollStartTime) {
  5756.  
  5757.               } else if (q > -1e-5 && q < 1e-5) {
  5758.  
  5759.               } else {
  5760.                 let cond1 = sl > 0 && rate > 0 && q > 0;
  5761.                 let cond2 = sl > 0 && rate < 0 && q < 0;
  5762.                 let cond3 = sl < 1e-5 && sl > -1e-5 && rate > 0 && q > 0;
  5763.                 if (cond1 || cond2 || cond3) {
  5764.                   this.$.items.scrollLeft += q;
  5765.                   this.maybeClampScroll();
  5766.                   this.updateArrows();
  5767.                 }
  5768.               }
  5769.  
  5770.               this.lastFrameTimestamp = a;
  5771.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  5772.               0 < this.$.items.scrollLeft || rate && 0 < rate ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  5773.             } : function (a) {
  5774.               const b = a - (this.lastFrameTimestamp || 0);
  5775.               this.$.items.scrollLeft += b / 1E3 * (this.scrollRatePixelsPerSecond || 0);
  5776.               this.maybeClampScroll();
  5777.               this.updateArrows();
  5778.               this.lastFrameTimestamp = a;
  5779.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  5780.               0 < this.$.items.scrollLeft || this.scrollRatePixelsPerSecond && 0 < this.scrollRatePixelsPerSecond ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  5781.             };
  5782.  
  5783.             console.log(`RAF_FIX: scrollIncrementally${RAF_FIX_scrollIncrementally}`, tag, "OK")
  5784.           } else {
  5785.             assertor(() => fnIntegrity(cProto.startScrolling, '1.43.31'));
  5786.             assertor(() => fnIntegrity(cProto.scrollIncrementally, '1.82.43'));
  5787.             console.log('RAF_FIX: scrollIncrementally', tag, "NG")
  5788.           }
  5789.  
  5790.  
  5791.           if (CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED && typeof cProto.attached === 'function' && !cProto.attached37 && typeof cProto.detached === 'function' && !cProto.detached37) {
  5792.  
  5793.             cProto.attached37 = cProto.attached;
  5794.             cProto.detached37 = cProto.detached;
  5795.  
  5796.             let naohzId = 0;
  5797.             cProto.__naohzId__ = 0;
  5798.             cProto.attached = function () {
  5799.               Promise.resolve().then(() => {
  5800.  
  5801.                 const hostElement = this.hostElement || this;
  5802.                 if (!(hostElement instanceof HTMLElement)) return;
  5803.                 if (!HTMLElement.prototype.matches.call(hostElement, '.yt-live-chat-renderer')) return;
  5804.                 const ironPage = HTMLElement.prototype.closest.call(hostElement, 'iron-pages.yt-live-chat-renderer');
  5805.                 // or #chat-messages
  5806.                 if (!ironPage) return;
  5807.  
  5808.                 if (this.__naohzId__) removeEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  5809.                 if (naohzId > 1e9) naohzId = naohzId % 1e4;
  5810.                 this.__naohzId__ = ++naohzId;
  5811.                 ironPage.setAttribute('naohz', `${+this.__naohzId__}`);
  5812.  
  5813.                 addEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  5814.  
  5815.               });
  5816.               return this.attached37.apply(this, arguments);
  5817.             };
  5818.             cProto.detached = function () {
  5819.               Promise.resolve().then(() => {
  5820.  
  5821.                 const ironPage = document.querySelector(`iron-pages[naohz="${+this.__naohzId__}"]`);
  5822.                 if (!ironPage) return;
  5823.  
  5824.                 removeEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  5825.  
  5826.               });
  5827.               return this.detached37.apply(this, arguments);
  5828.             };
  5829.  
  5830.             const clickFade = (u) => {
  5831.               u.click();
  5832.             };
  5833.             cProto.messageBoxClickHandlerForFade = async (evt) => {
  5834.  
  5835.               const target = (evt || 0).target || 0;
  5836.               if (!target) return;
  5837.  
  5838.               for (let p = target; p instanceof HTMLElement; p = nodeParent(p)) {
  5839.                 const is = p.is;
  5840.                 if (typeof is === 'string' && is) {
  5841.  
  5842.                   if (is === 'yt-live-chat-pinned-message-renderer') {
  5843.                     return;
  5844.                   }
  5845.                   if (is === 'iron-pages' || is === 'yt-live-chat-renderer' || is === 'yt-live-chat-app') {
  5846.                     const fade = HTMLElement.prototype.querySelector.call(p, 'yt-live-chat-pinned-message-renderer:not([hidden]) #fade');
  5847.                     if (fade) {
  5848.                       Promise.resolve(fade).then(clickFade);
  5849.                       evt && evt.stopPropagation();
  5850.                     }
  5851.                     return;
  5852.                   }
  5853.                   if (is !== 'yt-live-chat-ticker-renderer') {
  5854.                     if (is.startsWith('yt-live-chat-ticker-')) return;
  5855.                     if (!is.endsWith('-renderer')) return;
  5856.                   }
  5857.  
  5858.                 } else {
  5859.                   if ((p.nodeName || '').includes('BUTTON')) return;
  5860.                 }
  5861.  
  5862.               }
  5863.             };
  5864.  
  5865.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - OK")
  5866.  
  5867.           } else {
  5868.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - NG")
  5869.           }
  5870.  
  5871.  
  5872.         })();
  5873.  
  5874.         console.log("[End]");
  5875.  
  5876.         console.groupEnd();
  5877.  
  5878.       }).catch(console.warn);
  5879.  
  5880.  
  5881.       if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  5882.  
  5883.  
  5884.         customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  5885.  
  5886.           mightFirstCheckOnYtInit();
  5887.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  5888.           console.log("[Begin]");
  5889.           (() => {
  5890.  
  5891.             const tag = "yt-live-chat-message-input-renderer"
  5892.             const dummy = document.createElement(tag);
  5893.  
  5894.             const cProto = getProto(dummy);
  5895.             if (!cProto || !cProto.attached) {
  5896.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5897.               return;
  5898.             }
  5899.  
  5900.             let doHack = false;
  5901.             if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  5902.  
  5903.               // not cancellable
  5904.  
  5905.  
  5906.               doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  5907.  
  5908.             }
  5909.  
  5910.             if (doHack) {
  5911.  
  5912.               cProto.handleTimeout = function (a) {
  5913.                 console.log('cProto.handleTimeout', tag)
  5914.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  5915.                 this.timeoutDurationMs = this.timeoutMs = a;
  5916.                 this.countdownRatio = 1;
  5917.                 0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  5918.               };
  5919.               cProto.updateTimeout = function (a) {
  5920.                 console.log('cProto.updateTimeout', tag)
  5921.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  5922.                 this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  5923.                   this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  5924.                 this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  5925.                   rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  5926.               };
  5927.  
  5928.               console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  5929.             } else {
  5930.  
  5931.               console.log('typeof handleTimeout', typeof cProto.handleTimeout)
  5932.               console.log('typeof updateTimeout', typeof cProto.updateTimeout)
  5933.  
  5934.               console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  5935.             }
  5936.  
  5937.           })();
  5938.  
  5939.           console.log("[End]");
  5940.  
  5941.           console.groupEnd();
  5942.  
  5943.  
  5944.         })
  5945.  
  5946.  
  5947.       }
  5948.  
  5949.       if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  5950.  
  5951.  
  5952.         customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  5953.  
  5954.           mightFirstCheckOnYtInit();
  5955.           groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  5956.           console.log("[Begin]");
  5957.           (() => {
  5958.  
  5959.             const tag = "yt-emoji-picker-renderer"
  5960.             const dummy = document.createElement(tag);
  5961.  
  5962.             const cProto = getProto(dummy);
  5963.             if (!cProto || !cProto.attached) {
  5964.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5965.               return;
  5966.             }
  5967.  
  5968.             let doHack = false;
  5969.             if (typeof cProto.animateScroll_ === 'function') {
  5970.  
  5971.               // not cancellable
  5972.               console.log('animateScroll_', typeof cProto.animateScroll_)
  5973.  
  5974.               doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  5975.  
  5976.             }
  5977.  
  5978.             if (doHack) {
  5979.  
  5980.               const querySelector = HTMLElement.prototype.querySelector;
  5981.               const U = (element) => ({
  5982.                 querySelector: (selector) => querySelector.call(element, selector)
  5983.               });
  5984.  
  5985.               cProto.animateScroll_ = function (a) {
  5986.                 // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  5987.                 if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  5988.                 this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  5989.                 a -= this.lastAnimationTime_;
  5990.                 200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  5991.                   rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  5992.                     this.animationEnd_ = this.animationStart_ = null,
  5993.                     this.lastAnimationTime_ = 0);
  5994.                 this.updateButtons_()
  5995.               }
  5996.  
  5997.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  5998.             } else {
  5999.  
  6000.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  6001.             }
  6002.  
  6003.           })();
  6004.  
  6005.           console.log("[End]");
  6006.  
  6007.           console.groupEnd();
  6008.         });
  6009.       }
  6010.  
  6011.       if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  6012.  
  6013.  
  6014.         customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  6015.  
  6016.           mightFirstCheckOnYtInit();
  6017.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  6018.           console.log("[Begin]");
  6019.           (() => {
  6020.  
  6021.             const tag = "yt-live-chat-docked-message"
  6022.             const dummy = document.createElement(tag);
  6023.  
  6024.             const cProto = getProto(dummy);
  6025.             if (!cProto || !cProto.attached) {
  6026.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6027.               return;
  6028.             }
  6029.  
  6030.             let doHack = false;
  6031.             if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  6032.  
  6033.               // cancelable - this.intersectRAF <detached>
  6034.               // yt-live-chat-docked-message
  6035.               // boundCheckIntersections <-> checkIntersections
  6036.               // onDockableMessagesChanged
  6037.               //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  6038.  
  6039.               console.log('detached', typeof cProto.detached)
  6040.               console.log('checkIntersections', typeof cProto.checkIntersections)
  6041.               console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  6042.  
  6043.               doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  6044.  
  6045.             }
  6046.  
  6047.             if (doHack) {
  6048.  
  6049.               cProto.checkIntersections = function () {
  6050.                 // console.log('cProto.checkIntersections', tag)
  6051.                 if (this.dockableMessages.length) {
  6052.                   this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  6053.                   let a = this.dockableMessages[0]
  6054.                     , b = this.hostElement.getBoundingClientRect();
  6055.                   a = a.getBoundingClientRect();
  6056.                   let c = a.top - b.top
  6057.                     , d = 8 >= c;
  6058.                   c = 8 >= c - this.hostElement.clientHeight;
  6059.                   if (d) {
  6060.                     let e;
  6061.                     for (; d;) {
  6062.                       e = this.dockableMessages.shift();
  6063.                       d = this.dockableMessages[0];
  6064.                       if (!d)
  6065.                         break;
  6066.                       d = d.getBoundingClientRect();
  6067.                       c = d.top - b.top;
  6068.                       let f = 8 >= c;
  6069.                       if (8 >= c - a.height)
  6070.                         if (f)
  6071.                           a = d;
  6072.                         else
  6073.                           return;
  6074.                       d = f
  6075.                     }
  6076.                     this.dock(e)
  6077.                   } else
  6078.                     c && this.dockedItem && this.clear()
  6079.                 } else
  6080.                   this.intersectRAF = 0
  6081.               }
  6082.  
  6083.               cProto.onDockableMessagesChanged = function () {
  6084.                 // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  6085.                 this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  6086.               }
  6087.  
  6088.               cProto.detached = function () {
  6089.                 this.intersectRAF && rafHub.cancel(this.intersectRAF)
  6090.               }
  6091.  
  6092.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  6093.             } else {
  6094.  
  6095.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  6096.             }
  6097.  
  6098.           })();
  6099.  
  6100.           console.log("[End]");
  6101.  
  6102.           console.groupEnd();
  6103.  
  6104.         }).catch(console.warn);
  6105.  
  6106.       }
  6107.  
  6108.       if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  6109.  
  6110.  
  6111.         customElements.whenDefined("yt-img-shadow").then(() => {
  6112.  
  6113.           mightFirstCheckOnYtInit();
  6114.           groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  6115.           console.log("[Begin]");
  6116.           (() => {
  6117.  
  6118.             const tag = "yt-img-shadow"
  6119.             const dummy = document.createElement(tag);
  6120.  
  6121.             const cProto = getProto(dummy);
  6122.             if (!cProto || !cProto.attached) {
  6123.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6124.               return;
  6125.             }
  6126.  
  6127.             if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  6128.  
  6129.               cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  6130.               cProto.thumbnailChanged_ = function (a) {
  6131.  
  6132.                 if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  6133.                 if (!this.oldThumbnail_ && !this.thumbnail) return;
  6134.  
  6135.                 return this.thumbnailChanged66_.apply(this, arguments)
  6136.  
  6137.               }
  6138.               console.log("cProto.thumbnailChanged_ - OK");
  6139.  
  6140.             } else {
  6141.               console.log("cProto.thumbnailChanged_ - NG");
  6142.  
  6143.             }
  6144.             if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  6145.  
  6146.               cProto.setSrc66_ = cProto.setSrc_;
  6147.               cProto.setSrc_ = function (a) {
  6148.                 if ((((this || 0).$ || 0).img || 0).src === a) return;
  6149.                 return this.setSrc66_.apply(this, arguments)
  6150.               }
  6151.  
  6152.               console.log("cProto.setSrc_ - OK");
  6153.             } else {
  6154.  
  6155.               console.log("cProto.setSrc_ - NG");
  6156.             }
  6157.  
  6158.           })();
  6159.  
  6160.           console.log("[End]");
  6161.  
  6162.           console.groupEnd();
  6163.  
  6164.         }).catch(console.warn);
  6165.  
  6166.       }
  6167.  
  6168.       if (FIX_THUMBNAIL_DATACHANGED) {
  6169.  
  6170.  
  6171.  
  6172.         customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  6173.  
  6174.           mightFirstCheckOnYtInit();
  6175.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  6176.           console.log("[Begin]");
  6177.           (() => {
  6178.  
  6179.             const tag = "yt-live-chat-author-badge-renderer"
  6180.             const dummy = document.createElement(tag);
  6181.  
  6182.             const cProto = getProto(dummy);
  6183.             if (!cProto || !cProto.attached) {
  6184.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6185.               return;
  6186.             }
  6187.  
  6188.  
  6189.             if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && '|1.160.97|1.159.97|'.includes(`|${fnIntegrity(cProto.dataChanged)}|`)) {
  6190.  
  6191.  
  6192.  
  6193.               cProto.dataChanged86 = cProto.dataChanged;
  6194.               cProto.dataChanged = function (a) {
  6195.  
  6196.                 /*
  6197.  
  6198.                   for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  6199.                       b.removeChild(b.firstChild);
  6200.                   if (a)
  6201.                       if (a.icon) {
  6202.                           var c = document.createElement("yt-icon");
  6203.                           "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  6204.                           c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  6205.                           b.appendChild(c)
  6206.                       } else if (a.customThumbnail) {
  6207.                           c = document.createElement("img");
  6208.                           var d;
  6209.                           (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  6210.                           b.appendChild(c),
  6211.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  6212.                       }
  6213.  
  6214.                 */
  6215.  
  6216.                 const image = ((this || 0).$ || 0).image
  6217.                 if (image && a && image.firstElementChild) {
  6218.                   let exisiting = image.firstElementChild;
  6219.                   if (exisiting === image.lastElementChild) {
  6220.  
  6221.  
  6222.                     if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  6223.  
  6224.                       let c = exisiting;
  6225.                       if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  6226.                         if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  6227.                         if (c.defaultToFilled !== true) c.defaultToFilled = true;
  6228.                       } else {
  6229.                         let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  6230.                         if (c.icon !== p) c.icon = p;
  6231.                         if (c.defaultToFilled !== false) c.defaultToFilled = false;
  6232.                       }
  6233.                       return;
  6234.  
  6235.  
  6236.                     } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  6237.  
  6238.                       let c = exisiting;
  6239.                       if (a.customThumbnail.thumbnails.map(e => e.url).includes(c.src)) {
  6240.  
  6241.                         c.setAttribute("alt", this.hostElement.ariaLabel || "");
  6242.                         return;
  6243.                       }
  6244.                       /*
  6245.  
  6246.                       var d;
  6247.                       (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  6248.  
  6249.  
  6250.                         c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  6251.                         */
  6252.                     }
  6253.  
  6254.  
  6255.                   }
  6256.                 }
  6257.                 return this.dataChanged86.apply(this, arguments)
  6258.  
  6259.               }
  6260.               console.log("cProto.dataChanged - OK");
  6261.  
  6262.             } else {
  6263.               assertor(() => fnIntegrity(cProto.dataChanged, '1.160.97'));
  6264.               console.log("cProto.dataChanged - NG");
  6265.  
  6266.             }
  6267.  
  6268.           })();
  6269.  
  6270.           console.log("[End]");
  6271.  
  6272.           console.groupEnd();
  6273.  
  6274.         }).catch(console.warn);
  6275.  
  6276.  
  6277.       }
  6278.  
  6279.  
  6280.       if (FIX_TOOLTIP_DISPLAY) {
  6281.  
  6282.  
  6283.         customElements.whenDefined("tp-yt-paper-tooltip").then(() => {
  6284.  
  6285.           mightFirstCheckOnYtInit();
  6286.           groupCollapsed("YouTube Super Fast Chat", " | tp-yt-paper-tooltip hacks");
  6287.           console.log("[Begin]");
  6288.           (() => {
  6289.  
  6290.             const tag = "tp-yt-paper-tooltip"
  6291.             const dummy = document.createElement(tag);
  6292.  
  6293.             const cProto = getProto(dummy);
  6294.             if (!cProto || !cProto.attached) {
  6295.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6296.               return;
  6297.             }
  6298.  
  6299.             if (typeof cProto.attached === 'function' && typeof cProto.detached === 'function' && cProto._readyClients && cProto._attachDom && cProto.ready && !cProto._readyClients43) {
  6300.  
  6301.               cProto._readyClients43 = cProto._readyClients;
  6302.               cProto._readyClients = function () {
  6303.                 let r = cProto._readyClients43.apply(this, arguments);
  6304.                 if (this.$ && this.$$ && this.$.tooltip) this.root = null; // fix this.root = null != (b = a.root) ? b : this.host
  6305.                 return r;
  6306.               }
  6307.  
  6308.               console.log("_readyClients - OK");
  6309.  
  6310.             } else {
  6311.               console.log("_readyClients - NG");
  6312.  
  6313.             }
  6314.  
  6315.             if (typeof cProto.show === 'function' && !cProto.show17) {
  6316.               cProto.show17 = cProto.show;
  6317.               cProto.show = function () {
  6318.  
  6319.                 let r = this.show17.apply(this, arguments);
  6320.                 this._showing === true && Promise.resolve().then(() => {
  6321.                   const tooltip = (this.$ || 0).tooltip;
  6322.  
  6323.                   if (tooltip && tooltip.firstElementChild === null) {
  6324.                     let text = tooltip.textContent;
  6325.                     if (typeof text === 'string' && text.length >= 2) {
  6326.                       tooltip.textContent = text.trim();
  6327.                     }
  6328.                   }
  6329.                 }).catch(console.warn)
  6330.                 return r;
  6331.               }
  6332.  
  6333.               console.log("trim tooltip content - OK");
  6334.  
  6335.             } else {
  6336.               console.log("trim tooltip content - NG");
  6337.  
  6338.             }
  6339.  
  6340.             /*
  6341.             cProto.updatePosition61 = cProto.updatePosition;
  6342.  
  6343.  
  6344.             cProto.updatePosition = function () {
  6345.  
  6346.  
  6347.               if (this._target && this.offsetParent) {
  6348.                 var a = this.offset;
  6349.                 14 != this.marginTop && 14 == this.offset && (a = this.marginTop);
  6350.                 var b = this.offsetParent.getBoundingClientRect()
  6351.                   , c = this._target.getBoundingClientRect()
  6352.                   , d = this.getBoundingClientRect()
  6353.                   , e = (c.width - d.width) / 2
  6354.                   , h = (c.height - d.height) / 2
  6355.                   , l = c.left - b.left
  6356.                   , m = c.top - b.top;
  6357.                 switch (this.position) {
  6358.                   case "top":
  6359.                     var p = l + e;
  6360.                     var q = m - d.height - a;
  6361.                     break;
  6362.                   case "bottom":
  6363.                     p = l + e;
  6364.                     q = m + c.height + a;
  6365.                     break;
  6366.                   case "left":
  6367.                     p = l - d.width - a;
  6368.                     q = m + h;
  6369.                     break;
  6370.                   case "right":
  6371.                     p = l + c.width + a,
  6372.                       q = m + h;
  6373.                 }
  6374.  
  6375.               if(this.ascee) {
  6376.                 this.fitToVisibleBounds = false;
  6377.               }
  6378.                 this.fitToVisibleBounds ? (b.left + p + d.width > window.innerWidth ? (this.style.right = "0px",
  6379.                   this.style.left = "auto") : (this.style.left = Math.max(0, p) + "px",
  6380.                     this.style.right = "auto"),
  6381.                   b.top + q + d.height > window.innerHeight ? (this.style.bottom = b.height + "px",
  6382.                     this.style.top = "auto") : (this.style.top = Math.max(-b.top, q) + "px",
  6383.                       this.style.bottom = "auto")) : (this.style.left = p + "px",
  6384.                         this.style.top = q + "px")
  6385.               }
  6386.             }
  6387.  
  6388.             cProto.updateStyles61 = cProto.updateStyles;
  6389.             cProto.updateStyles= function(){
  6390.               if(this.ascee) return;
  6391.               return this.updateStyles61.apply(this,arguments);
  6392.             }
  6393.             */
  6394.  
  6395.  
  6396.           })();
  6397.  
  6398.           console.log("[End]");
  6399.  
  6400.           console.groupEnd();
  6401.  
  6402.         }).catch(console.warn);
  6403.  
  6404.  
  6405.  
  6406.       }
  6407.  
  6408.  
  6409.  
  6410.       if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK) {
  6411.  
  6412.  
  6413.         const hookDocumentMouseDownSetupFn = () => {
  6414.  
  6415.  
  6416.  
  6417.           let muzTimestamp = 0;
  6418.           let nszDropdown = null;
  6419.  
  6420.  
  6421.  
  6422.           const handlerObject = {
  6423.  
  6424.             // mdHandler282 : function (evt) {
  6425.             //   // console.log(evt, 1, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  6426.             //   if (!evt || !evt.isTrusted) return;
  6427.             //   muzTimestamp = 0;
  6428.             //   nszDropdown = null;
  6429.  
  6430.             //   const hostElement = this.hostElement || this;
  6431.             //   if (!evt || !evt.isTrusted || !hostElement.hasAttribute('menu-visible')) return;
  6432.             //   if (!hostElement.contains(evt.target)) return;
  6433.             //   let targetDropDown = null;
  6434.             //   for(const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')){
  6435.             //     if(dropdown && dropdown.positionTarget && hostElement.contains( dropdown.positionTarget)){
  6436.             //       targetDropDown = dropdown;
  6437.             //     }
  6438.             //   }
  6439.             //   if ((nszDropdown = targetDropDown)) {
  6440.             //     muzTimestamp = Date.now();
  6441.             //     evt.stopImmediatePropagation();
  6442.             //     evt.stopPropagation();
  6443.             //   }
  6444.  
  6445.             // },
  6446.  
  6447.  
  6448.             muHandler282: function (evt) {
  6449.               // console.log(evt, 7, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  6450.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  6451.               const dropdown = nszDropdown;
  6452.               muzTimestamp = 0;
  6453.               nszDropdown = null;
  6454.  
  6455.               const kurMPC = kRef(currentMenuPivotWR) || 0;
  6456.               const hostElement = kurMPC.hostElement || kurMPC;
  6457.               if (!hostElement.hasAttribute('menu-visible')) return;
  6458.  
  6459.               const chatBanner = HTMLElement.prototype.closest.call(hostElement, 'yt-live-chat-banner-renderer') || 0;
  6460.               if (chatBanner) return;
  6461.  
  6462.               if (dropdown && dropdown.positionTarget && hostElement.contains(dropdown.positionTarget)) {
  6463.  
  6464.                 /*
  6465.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  6466.                 if(parentButton) return;
  6467.                 */
  6468.  
  6469.                 muzTimestamp = Date.now();
  6470.                 evt.stopImmediatePropagation();
  6471.                 evt.stopPropagation();
  6472.                 Promise.resolve(dropdown).then((dropdown) => {
  6473.                   dropdown.cancel();
  6474.                 });
  6475.                 // document.body.click();
  6476.               }
  6477.  
  6478.             },
  6479.  
  6480.             mlHandler282: function (evt) {
  6481.               muzTimestamp = 0;
  6482.               nszDropdown = null;
  6483.             },
  6484.  
  6485.             ckHandler282: function (evt) {
  6486.               // console.log(evt, 3, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  6487.  
  6488.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  6489.               if (Date.now() - muzTimestamp < 40) {
  6490.  
  6491.                 /*
  6492.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  6493.                 if(parentButton) return;
  6494.                 */
  6495.  
  6496.                 muzTimestamp = Date.now();
  6497.                 evt.stopImmediatePropagation();
  6498.                 evt.stopPropagation();
  6499.               }
  6500.  
  6501.             },
  6502.  
  6503.             tapHandler282: function (evt) {
  6504.               // console.log(evt, 2, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  6505.  
  6506.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  6507.               if (Date.now() - muzTimestamp < 40) {
  6508.  
  6509.                 /*
  6510.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  6511.                 if(parentButton) return;
  6512.                 */
  6513.  
  6514.                 muzTimestamp = Date.now();
  6515.                 evt.stopImmediatePropagation();
  6516.                 evt.stopPropagation();
  6517.               }
  6518.  
  6519.             },
  6520.  
  6521.  
  6522.             handleEvent(evt) {
  6523.  
  6524.  
  6525.               if (evt) {
  6526.                 const kurMPC = kRef(currentMenuPivotWR) || 0;
  6527.                 const cnt = insp(kurMPC);
  6528.                 const hostElement = cnt.hostElement || cnt;
  6529.                 if (!cnt || cnt.isAttached !== true || hostElement.isConnected !== true) return;
  6530.                 switch (evt.type) {
  6531.                   // case 'mousedown':
  6532.                   // return this.mdHandler282.call(kurMPC, evt);
  6533.                   case 'mouseup':
  6534.                     return this.muHandler282(evt);
  6535.                   case 'mouseleave':
  6536.                     return this.mlHandler282(evt);
  6537.                   case 'tap':
  6538.                     return this.tapHandler282(evt);
  6539.                   case 'click':
  6540.                     return this.ckHandler282(evt);
  6541.                 }
  6542.               }
  6543.  
  6544.             }
  6545.  
  6546.  
  6547.  
  6548.           }
  6549.  
  6550.           document.addEventListener('mousedown', function (evt) {
  6551.  
  6552.             if (!evt || !evt.isTrusted || !evt.target) return;
  6553.  
  6554.  
  6555.  
  6556.             muzTimestamp = 0;
  6557.             nszDropdown = null;
  6558.  
  6559.             /*
  6560.             const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  6561.             if(parentButton){
  6562.               const kurMPC = HTMLElement.prototype.closest.call(parentButton, '[whole-message-clickable]') || 0;
  6563.               if(kurMPC){
  6564.                 evt.preventDefault();
  6565.                 evt.stopImmediatePropagation();
  6566.                 evt.stopPropagation();
  6567.               }
  6568.               return;
  6569.             }
  6570.             */
  6571.  
  6572.             /** @type {HTMLElement | null} */
  6573.             const kurMP = kRef(currentMenuPivotWR);
  6574.             if (!kurMP) return;
  6575.             const kurMPC = HTMLElement.prototype.closest.call(kurMP, '[menu-visible]') || 0;
  6576.  
  6577.             if (!kurMPC || !kurMPC.hasAttribute('whole-message-clickable')) return;
  6578.  
  6579.             if (!kurMPC.isClickableChatRow111 || !kurMPC.isClickableChatRow111() || !HTMLElement.prototype.contains.call(kurMPC, evt.target)) return;
  6580.  
  6581.             const chatBanner = HTMLElement.prototype.closest.call(kurMPC, 'yt-live-chat-banner-renderer') || 0;
  6582.             if (chatBanner) return;
  6583.  
  6584.  
  6585.             let targetDropDown = null;
  6586.             for (const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')) {
  6587.               if (dropdown && dropdown.positionTarget === kurMP) {
  6588.                 targetDropDown = dropdown;
  6589.               }
  6590.             }
  6591.  
  6592.             if (!targetDropDown) return;
  6593.  
  6594.  
  6595.             /*
  6596.             if (parentButton) {
  6597.               evt.preventDefault();
  6598.               evt.stopImmediatePropagation();
  6599.               evt.stopPropagation();
  6600.               currentMenuPivotWR = mWeakRef(kurMPC);
  6601.               return;
  6602.             }
  6603.             */
  6604.  
  6605.             if ((nszDropdown = targetDropDown)) {
  6606.               muzTimestamp = Date.now();
  6607.               evt.stopImmediatePropagation();
  6608.               evt.stopPropagation();
  6609.               currentMenuPivotWR = mWeakRef(kurMPC);
  6610.  
  6611.               const listenOpts = { capture: true, passive: false, once: true };
  6612.  
  6613.               // remove unexcecuted eventHandler
  6614.               document.removeEventListener('mouseup', handlerObject, listenOpts);
  6615.               document.removeEventListener('mouseleave', handlerObject, listenOpts);
  6616.               document.removeEventListener('tap', handlerObject, listenOpts);
  6617.               document.removeEventListener('click', handlerObject, listenOpts);
  6618.  
  6619.               // inject one time eventHandler to by pass events
  6620.               document.addEventListener('mouseup', handlerObject, listenOpts);
  6621.               document.addEventListener('mouseleave', handlerObject, listenOpts);
  6622.               document.addEventListener('tap', handlerObject, listenOpts);
  6623.               document.addEventListener('click', handlerObject, listenOpts);
  6624.  
  6625.             }
  6626.  
  6627.           }, true);
  6628.  
  6629.         }
  6630.  
  6631.  
  6632.         // yt-live-chat-paid-message-renderer ??
  6633.  
  6634.         /*
  6635.  
  6636.         [...(new Set([...document.querySelectorAll('*')].filter(e=>e.is&&('shouldSupportWholeItemClick' in e)).map(e=>e.is))).keys()]
  6637.  
  6638.  
  6639.         "yt-live-chat-ticker-paid-message-item-renderer"
  6640.         "yt-live-chat-ticker-paid-sticker-item-renderer"
  6641.         "yt-live-chat-paid-message-renderer"
  6642.         "yt-live-chat-text-message-renderer"
  6643.         "yt-live-chat-paid-sticker-renderer"
  6644.  
  6645.         */
  6646.  
  6647.  
  6648.         whenDefinedMultiple([
  6649.  
  6650.           "yt-live-chat-paid-message-renderer",
  6651.           "yt-live-chat-membership-item-renderer",
  6652.           "yt-live-chat-paid-sticker-renderer",
  6653.           "yt-live-chat-text-message-renderer",
  6654.           "yt-live-chat-auto-mod-message-renderer",
  6655.  
  6656.           /*
  6657.           "yt-live-chat-ticker-paid-message-item-renderer",
  6658.           "yt-live-chat-ticker-paid-sticker-item-renderer",
  6659.           "yt-live-chat-paid-message-renderer",
  6660.           "yt-live-chat-text-message-renderer",
  6661.           "yt-live-chat-paid-sticker-renderer",
  6662.  
  6663.           "yt-live-chat-ticker-sponsor-item-renderer",
  6664.           "yt-live-chat-banner-header-renderer",
  6665.           "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  6666.           "ytd-sponsorships-live-chat-header-renderer",
  6667.           "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  6668.  
  6669.  
  6670.  
  6671.  
  6672.           "yt-live-chat-auto-mod-message-renderer",
  6673.           "yt-live-chat-text-message-renderer",
  6674.           "yt-live-chat-paid-message-renderer",
  6675.  
  6676.           "yt-live-chat-legacy-paid-message-renderer",
  6677.           "yt-live-chat-membership-item-renderer",
  6678.           "yt-live-chat-paid-sticker-renderer",
  6679.           "yt-live-chat-donation-announcement-renderer",
  6680.           "yt-live-chat-moderation-message-renderer",
  6681.           "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  6682.           "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  6683.           "yt-live-chat-viewer-engagement-message-renderer",
  6684.  
  6685.           */
  6686.  
  6687.  
  6688.         ]).then(sTags => {
  6689.  
  6690.  
  6691.           mightFirstCheckOnYtInit();
  6692.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-renderer(s)... hacks");
  6693.           console.log("[Begin]");
  6694.           let doMouseHook = false;
  6695.  
  6696.           const dProto = {
  6697.             isClickableChatRow111: function () {
  6698.               return (
  6699.                 this.data && typeof this.shouldSupportWholeItemClick === 'function' && typeof this.hasModerationOverlayVisible === 'function' &&
  6700.                 this.data.contextMenuEndpoint && this.wholeMessageClickable && this.shouldSupportWholeItemClick() && !this.hasModerationOverlayVisible()
  6701.               ); // follow .onItemTap(a)
  6702.             }
  6703.           };
  6704.  
  6705.           for (const sTag of sTags) { // ##tag##
  6706.  
  6707.  
  6708.             (() => {
  6709.  
  6710.               const tag = sTag;
  6711.               const dummy = document.createElement(tag);
  6712.  
  6713.               const cProto = getProto(dummy);
  6714.               if (!cProto || !cProto.attached) {
  6715.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  6716.                 return;
  6717.               }
  6718.  
  6719.               const dCnt = insp(dummy);
  6720.               if ('wholeMessageClickable' in dCnt && typeof dCnt.hasModerationOverlayVisible === 'function' && typeof dCnt.shouldSupportWholeItemClick === 'function') {
  6721.  
  6722.                 cProto.isClickableChatRow111 = dProto.isClickableChatRow111;
  6723.  
  6724.                 const toHookDocumentMouseDown = typeof cProto.shouldSupportWholeItemClick === 'function' && typeof cProto.hasModerationOverlayVisible === 'function';
  6725.  
  6726.                 if (toHookDocumentMouseDown) {
  6727.                   doMouseHook = true;
  6728.                 }
  6729.  
  6730.                 console.log("shouldSupportWholeItemClick Y", tag);
  6731.  
  6732.               } else {
  6733.  
  6734.                 console.log("shouldSupportWholeItemClick N", tag);
  6735.               }
  6736.  
  6737.  
  6738.             })();
  6739.  
  6740.           }
  6741.  
  6742.  
  6743.           if (doMouseHook) {
  6744.  
  6745.             hookDocumentMouseDownSetupFn();
  6746.  
  6747.  
  6748.             console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent OK");
  6749.           }
  6750.  
  6751.           console.log("[End]");
  6752.  
  6753.           console.groupEnd();
  6754.  
  6755.  
  6756.         }).catch(console.warn);
  6757.  
  6758.  
  6759.         // https://www.youtube.com/watch?v=oQzFi1NO7io
  6760.  
  6761.  
  6762.       }
  6763.  
  6764.       if (NO_ITEM_TAP_FOR_NON_STATIONARY_TAP) {
  6765.         let targetElementCntWR = null;
  6766.         let _e0 = null;
  6767.         document.addEventListener('mousedown', (e) => {
  6768.           if (!e || !e.isTrusted) return;
  6769.           let element = e.target;
  6770.           for (; element instanceof HTMLElement; element = element.parentNode) {
  6771.             if (element.is) break;
  6772.           }
  6773.           if (!element || !element.is) return;
  6774.           const cnt = insp(element);
  6775.           if (typeof cnt.onItemTap === 'function') {
  6776.             cnt._onItemTap_isNonStationary = 0;
  6777.             const cProto = getProto(element);
  6778.             if (!cProto.onItemTap366 && typeof cProto.onItemTap === 'function' && cProto.onItemTap.length === 1) {
  6779.               cProto.onItemTap366 = cProto.onItemTap;
  6780.               cProto.onItemTap = function (a) {
  6781.                 const t = this._onItemTap_isNonStationary;
  6782.                 this._onItemTap_isNonStationary = 0;
  6783.                 if (t > Date.now()) return;
  6784.                 return this.onItemTap366.apply(this, arguments)
  6785.               }
  6786.             }
  6787.             _e0 = e;
  6788.             targetElementCntWR = mWeakRef(cnt);
  6789.           } else {
  6790.             _e0 = null;
  6791.             targetElementCntWR = null;
  6792.           }
  6793.         }, { capture: true, passive: true });
  6794.  
  6795.         document.addEventListener('mouseup', (e) => {
  6796.           if (!e || !e.isTrusted) return;
  6797.           const e0 = _e0;
  6798.           _e0 = null;
  6799.           if (!e0) return;
  6800.           const cnt = kRef(targetElementCntWR);
  6801.           targetElementCntWR = null;
  6802.           if (!cnt) return;
  6803.           if (e.timeStamp - e0.timeStamp > TAP_ACTION_DURATION) {
  6804.             cnt._onItemTap_isNonStationary = Date.now() + 40;
  6805.           } else if ((window.getSelection() + "").trim().replace(/[\u2000-\u200a\u202f\u2800\u200B\u200C\u200D\uFEFF]+/g, '').length >= 1) {
  6806.             cnt._onItemTap_isNonStationary = Date.now() + 40;
  6807.           } else {
  6808.             const dx = e.clientX - e0.clientX;
  6809.             const dy = e.clientY - e0.clientY;
  6810.             const dd = Math.sqrt(dx * dx + dy * dy);
  6811.             const ddmm = px2mm(dd);
  6812.             if (ddmm > 1.0) {
  6813.               cnt._onItemTap_isNonStationary = Date.now() + 40;
  6814.             } else {
  6815.               cnt._onItemTap_isNonStationary = 0;
  6816.             }
  6817.           }
  6818.         }, { capture: true, passive: true });
  6819.  
  6820.       }
  6821.  
  6822.  
  6823.       const __showContextMenu_assign_lock_with_external_unlock_ = function (targetCnt) {
  6824.  
  6825.         let rr = null;
  6826.         const p1 = new Promise(resolve => {
  6827.           rr = resolve;
  6828.         });
  6829.  
  6830.         const p1unlock = () => {
  6831.           const f = rr;
  6832.           if (f) {
  6833.             rr = null;
  6834.             f();
  6835.           }
  6836.         }
  6837.  
  6838.         return {
  6839.           p1,
  6840.           p1unlock,
  6841.           assignLock: (targetCnt, timeout) => {
  6842.             targetCnt.__showContextMenu_assign_lock__(p1);
  6843.             if (timeout) setTimeout(p1unlock, timeout);
  6844.           }
  6845.         }
  6846.  
  6847.       }
  6848.  
  6849.       if (PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN) {
  6850.  
  6851.         document.addEventListener('mousedown', function (evt) {
  6852.  
  6853.           const maxloopDOMTreeElements = 4;
  6854.           const maxloopYtCompontents = 4;
  6855.           let j1 = 0;
  6856.           let j2 = 0;
  6857.           let target = (evt || 0).target || 0;
  6858.           if (!target) return;
  6859.  
  6860.  
  6861.           while (target instanceof HTMLElement) {
  6862.             if (++j1 > maxloopDOMTreeElements) break;
  6863.             if (typeof (target.is || insp(target).is || null) === 'string') break;
  6864.             target = nodeParent(target);
  6865.           }
  6866.           const components = [];
  6867.           while (target instanceof HTMLElement) {
  6868.             if (++j2 > maxloopYtCompontents) break;
  6869.             const cnt = insp(target);
  6870.             if (typeof (target.is || cnt.is || null) === 'string') {
  6871.               components.push(target);
  6872.             }
  6873.             if (typeof cnt.showContextMenu === 'function') break;
  6874.             target = target.parentComponent || cnt.parentComponent || null;
  6875.           }
  6876.           if (!(target instanceof HTMLElement)) return;
  6877.           const targetCnt = insp(target);
  6878.           if (typeof targetCnt.handleGetContextMenuResponse_ !== 'function' || typeof targetCnt.handleGetContextMenuError !== 'function') {
  6879.             console.log('Error Found: handleGetContextMenuResponse_ OR handleGetContextMenuError is not defined on a component with showContextMenu')
  6880.             return;
  6881.           }
  6882.  
  6883.           const endpoint = (targetCnt.data || 0).contextMenuEndpoint
  6884.           if (!endpoint) return;
  6885.           if (targetCnt.opened || !targetCnt.isAttached) return;
  6886.  
  6887.           if (typeof targetCnt.__cacheResolvedEndpointData__ !== 'function') {
  6888.             console.log(`preRequest for showContextMenu in ${targetCnt.is} is not yet supported.`)
  6889.           }
  6890.  
  6891.           const targetDollar = indr(target);
  6892.  
  6893.           let doPreRequest = false;
  6894.           if (components.length >= 2 && components[0].id === 'menu-button' && (targetDollar || 0)['menu-button'] === components[0]) {
  6895.             doPreRequest = true;
  6896.           } else if (components.length === 1 && components[0] === target) {
  6897.             doPreRequest = true;
  6898.           } else if (components.length >= 2 && components[0].id === 'author-photo' && (targetDollar || 0)['author-photo'] === components[0]) {
  6899.             doPreRequest = true;
  6900.           }
  6901.           if (doPreRequest === false) {
  6902.             console.log('doPreRequest = fasle on showContextMenu', components);
  6903.             return;
  6904.           }
  6905.  
  6906.           if (typeof targetCnt.__getCachedEndpointData__ !== 'function' || targetCnt.__getCachedEndpointData__(endpoint)) return;
  6907.  
  6908.           if ((typeof targetCnt.__showContextMenu_mutex_unlock_isEmpty__ === 'function') && !targetCnt.__showContextMenu_mutex_unlock_isEmpty__()) {
  6909.             console.log('preRequest on showContextMenu aborted due to stacked network request');
  6910.             return;
  6911.           }
  6912.  
  6913.  
  6914.           const onSuccess = (a) => {
  6915.             /*
  6916.  
  6917.               dQ() && (a = a.response);
  6918.               a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && this.showContextMenu_(a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  6919.               a.actions && Eu(this.hostElement, "yt-live-chat-actions", [a.actions])
  6920.  
  6921.             */
  6922.  
  6923.             a = a.response || a;
  6924.  
  6925.             if (!a) {
  6926.               console.log('unexpected error in prerequest for showContextMenu.onSuccess');
  6927.               return;
  6928.             }
  6929.  
  6930.             let z = null;
  6931.             a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && (z = a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  6932.  
  6933.             if (z) {
  6934.               a = z;
  6935.               targetCnt.__cacheResolvedEndpointData__(endpoint, a, true);
  6936.             }
  6937.  
  6938.           };
  6939.           const onFailure = (a) => {
  6940.  
  6941.             /*
  6942.  
  6943.               if (a instanceof Error || a instanceof Object || a instanceof String)
  6944.                   var b = a;
  6945.               hq(new xm("Error encountered calling GetLiveChatItemContextMenu",b))
  6946.  
  6947.             */
  6948.  
  6949.             targetCnt.__cacheResolvedEndpointData__(endpoint, null);
  6950.             // console.log('onFailure', a)
  6951.  
  6952.           };
  6953.  
  6954.           if (doPreRequest) {
  6955.  
  6956.             let propertyCounter = 0;
  6957.             const pm1 = __showContextMenu_assign_lock_with_external_unlock_(targetCnt);
  6958.             const p1Timeout = 800;
  6959.             const proxyKey = '__$$__proxy_to_this__$$__' + Date.now();
  6960.  
  6961.             try {
  6962.  
  6963.               const onSuccessHelperFn = function () {
  6964.                 pm1.p1unlock();
  6965.                 if (propertyCounter !== 5) {
  6966.                   console.log('Error in prerequest for showContextMenu.onSuccessHelperFn')
  6967.                   return;
  6968.                 }
  6969.                 if (this[proxyKey] !== targetCnt) {
  6970.                   console.log('Error in prerequest for showContextMenu.this');
  6971.                   return;
  6972.                 }
  6973.                 onSuccess(...arguments);
  6974.               };
  6975.               const onFailureHelperFn = function () {
  6976.                 pm1.p1unlock();
  6977.                 if (propertyCounter !== 5) {
  6978.                   console.log('Error in prerequest for showContextMenu.onFailureHelperFn')
  6979.                   return;
  6980.                 }
  6981.                 if (this[proxyKey] !== targetCnt) {
  6982.                   console.log('Error in prerequest for showContextMenu.this');
  6983.                   return;
  6984.                 }
  6985.                 onFailure(...arguments);
  6986.  
  6987.               }
  6988.               const fakeTargetCnt = new Proxy({
  6989.                 __showContextMenu_forceNativeRequest__: 1,
  6990.                 __showContextMenu_sync_mode_request__: 1,
  6991.                 get handleGetContextMenuResponse_() {
  6992.                   propertyCounter += 2;
  6993.                   return onSuccessHelperFn;
  6994.                 },
  6995.                 get handleGetContextMenuError() {
  6996.                   propertyCounter += 3;
  6997.                   return onFailureHelperFn;
  6998.                 }
  6999.               }, {
  7000.                 get(_, key, receiver) {
  7001.                   if (key in _) return _[key];
  7002.                   if (key === proxyKey) return targetCnt;
  7003.  
  7004.                   let giveNative = false;
  7005.                   if (key in targetCnt) {
  7006.                     if (key === 'data') giveNative = true;
  7007.                     else if (typeof targetCnt[key] === 'function') giveNative = true;
  7008.                   }
  7009.                   if (giveNative) return targetCnt[key];
  7010.                 }
  7011.               });
  7012.  
  7013.               const fakeEvent = (() => {
  7014.                 const { target, bubbles, cancelable, cancelBubble, srcElement, timeStamp, defaultPrevented, currentTarget, composed } = evt;
  7015.                 const nf = function () { }
  7016.                 const [stopPropagation, stopImmediatePropagation, preventDefault] = [nf, nf, nf];
  7017.  
  7018.                 return {
  7019.                   type: 'tap',
  7020.                   eventPhase: 0,
  7021.                   isTrusted: false,
  7022.                   __composed: true,
  7023.                   bubbles, cancelable, cancelBubble, timeStamp,
  7024.                   target, srcElement, defaultPrevented, currentTarget, composed,
  7025.                   stopPropagation, stopImmediatePropagation, preventDefault
  7026.                 };
  7027.               })(evt);
  7028.               targetCnt.showContextMenu.call(fakeTargetCnt, fakeEvent);
  7029.  
  7030.  
  7031.             } catch (e) {
  7032.               console.warn(e);
  7033.               propertyCounter = 7;
  7034.  
  7035.             }
  7036.             if (propertyCounter !== 5) {
  7037.               console.log('Error in prerequest for showContextMenu', propertyCounter);
  7038.               return;
  7039.             }
  7040.  
  7041.             pm1.assignLock(targetCnt, p1Timeout);
  7042.  
  7043.           }
  7044.  
  7045.  
  7046.  
  7047.  
  7048.  
  7049.  
  7050.         }, true);
  7051.  
  7052.  
  7053.       }
  7054.  
  7055.  
  7056.  
  7057.       /*
  7058.  
  7059.       const w=new Set(); for(const a of document.getElementsByTagName('*')) if(a.showContextMenu && a.showContextMenu_) w.add(a.is||''); console.log([...w.keys()])
  7060.  
  7061.       */
  7062.  
  7063.       whenDefinedMultiple([
  7064.         "yt-live-chat-ticker-sponsor-item-renderer",
  7065.         "yt-live-chat-banner-header-renderer",
  7066.         "yt-live-chat-text-message-renderer",
  7067.         "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  7068.         "ytd-sponsorships-live-chat-header-renderer",
  7069.         "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  7070.  
  7071.         "yt-live-chat-paid-sticker-renderer",
  7072.         "yt-live-chat-viewer-engagement-message-renderer",
  7073.         "yt-live-chat-paid-message-renderer"
  7074.  
  7075.  
  7076.  
  7077.  
  7078.       ]).then(sTags => {
  7079.  
  7080.         mightFirstCheckOnYtInit();
  7081.         groupCollapsed("YouTube Super Fast Chat", " | fixShowContextMenu");
  7082.         console.log("[Begin]");
  7083.  
  7084.  
  7085.         const __showContextMenu_mutex__ = new Mutex();
  7086.         let __showContextMenu_mutex_unlock__ = null;
  7087.         let lastShowMenuTarget = null;
  7088.  
  7089.  
  7090.  
  7091.  
  7092.         const wm37 = new WeakMap();
  7093.  
  7094.         const dProto = {
  7095.  
  7096.  
  7097.           // CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN
  7098.  
  7099.           __cacheResolvedEndpointData__: (endpoint, a, doDeepCopy) => {
  7100.             if (a) {
  7101.               if (doDeepCopy) a = deepCopy(a);
  7102.               wm37.set(endpoint, a);
  7103.             } else {
  7104.               wm37.remove(endpoint);
  7105.             }
  7106.           },
  7107.           __getCachedEndpointData__: function (endpoint) {
  7108.             endpoint = endpoint || (this.data || 0).contextMenuEndpoint || 0;
  7109.             if (endpoint) return wm37.get(endpoint);
  7110.             return null;
  7111.           },
  7112.           /** @type {(resolvedEndpoint: any) => void 0} */
  7113.           __showCachedContextMenu__: function (resolvedEndpoint) { // non-null
  7114.  
  7115.             resolvedEndpoint = deepCopy(resolvedEndpoint);
  7116.             // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  7117.             Promise.resolve(resolvedEndpoint).then(() => {
  7118.               this.__showContextMenu_skip_cacheResolvedEndpointData__ = 1;
  7119.               this.showContextMenu_(resolvedEndpoint);
  7120.               this.__showContextMenu_skip_cacheResolvedEndpointData__ = 0;
  7121.             });
  7122.  
  7123.  
  7124.           },
  7125.  
  7126.  
  7127.  
  7128.           showContextMenuForCacheReopen: function (a) {
  7129.             if (!this.__showContextMenu_forceNativeRequest__) {
  7130.               const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  7131.               if (endpoint) {
  7132.                 const resolvedEndpoint = this.__getCachedEndpointData__(endpoint);
  7133.                 if (resolvedEndpoint) {
  7134.                   this.__showCachedContextMenu__(resolvedEndpoint);
  7135.                   a && a.stopPropagation()
  7136.                   return;
  7137.                 }
  7138.               }
  7139.             }
  7140.             return this.showContextMenu37(a);
  7141.           },
  7142.  
  7143.           showContextMenuForCacheReopen_: function (a) {
  7144.             if (!this.__showContextMenu_skip_cacheResolvedEndpointData__) {
  7145.               const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  7146.               if (endpoint) {
  7147.                 const f = this.__cacheResolvedEndpointData__;
  7148.                 if (typeof f === 'function') f(endpoint, a, true);
  7149.               }
  7150.             }
  7151.             return this.showContextMenu37_(a);
  7152.           },
  7153.  
  7154.           // ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU
  7155.  
  7156.           showContextMenuWithDisableScroll: function (a) {
  7157.  
  7158.             const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  7159.             if (endpoint && typeof this.is === 'string' && this.menuVisible === false && this.menuOpen === false) {
  7160.  
  7161.               const parentComponent = this.parentComponent;
  7162.               if (parentComponent && parentComponent.is === 'yt-live-chat-item-list-renderer' && parentComponent.contextMenuOpen === false && parentComponent.allowScroll === true) {
  7163.                 parentComponent.allowScroll = false;
  7164.               }
  7165.             }
  7166.  
  7167.             return this.showContextMenu48.apply(this, arguments);
  7168.  
  7169.           },
  7170.  
  7171.           // ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU
  7172.  
  7173.           __showContextMenu_mutex_unlock_isEmpty__: () => {
  7174.             return __showContextMenu_mutex_unlock__ === null;
  7175.           },
  7176.  
  7177.           __showContextMenu_assign_lock__: function (p) {
  7178.  
  7179.             const mutex = __showContextMenu_mutex__;
  7180.  
  7181.             mutex.lockWith(unlock => {
  7182.               p.then(unlock);
  7183.             });
  7184.  
  7185.           },
  7186.  
  7187.           showContextMenuWithMutex: function (a) {
  7188.             lastShowMenuTarget = this;
  7189.  
  7190.             if (this.__showContextMenu_sync_mode_request__) {
  7191.  
  7192.               return this.showContextMenu47(a);
  7193.             } else {
  7194.  
  7195.               const mutex = __showContextMenu_mutex__;
  7196.  
  7197.               mutex.lockWith(unlock => {
  7198.                 if (lastShowMenuTarget !== this) {
  7199.                   unlock();
  7200.                   return;
  7201.                 }
  7202.  
  7203.                 setTimeout(unlock, 800); // in case network failure
  7204.                 __showContextMenu_mutex_unlock__ = unlock;
  7205.                 try {
  7206.                   this.showContextMenu47(a);
  7207.                 } catch (e) {
  7208.                   console.warn(e);
  7209.                   unlock(); // in case function script error
  7210.                 }
  7211.  
  7212.               });
  7213.  
  7214.             }
  7215.  
  7216.  
  7217.           },
  7218.  
  7219.           showContextMenuWithMutex_: function (a) {
  7220.  
  7221.             if (__showContextMenu_mutex_unlock__ && this === lastShowMenuTarget) {
  7222.               __showContextMenu_mutex_unlock__();
  7223.               __showContextMenu_mutex_unlock__ = null;
  7224.             }
  7225.             return this.showContextMenu47_(a);
  7226.  
  7227.           }
  7228.  
  7229.         }
  7230.  
  7231.         for (const tag of sTags) { // ##tag##
  7232.  
  7233.  
  7234.  
  7235.           (() => {
  7236.  
  7237.             const dummy = document.createElement(tag);
  7238.  
  7239.             const cProto = getProto(dummy);
  7240.             if (!cProto || !cProto.attached) {
  7241.               console.warn(`proto.attached for ${tag} is unavailable.`);
  7242.               return;
  7243.             }
  7244.  
  7245.  
  7246.  
  7247.  
  7248.             if (CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN && typeof cProto.showContextMenu === 'function' && typeof cProto.showContextMenu_ === 'function' && !cProto.showContextMenu37 && !cProto.showContextMenu37_ && cProto.showContextMenu.length === 1 && cProto.showContextMenu_.length === 1) {
  7249.  
  7250.               cProto.showContextMenu37_ = cProto.showContextMenu_;
  7251.               cProto.showContextMenu37 = cProto.showContextMenu;
  7252.  
  7253.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  7254.               cProto.__cacheResolvedEndpointData__ = dProto.__cacheResolvedEndpointData__
  7255.               cProto.__getCachedEndpointData__ = dProto.__getCachedEndpointData__
  7256.               cProto.__showCachedContextMenu__ = dProto.__showCachedContextMenu__
  7257.  
  7258.               cProto.showContextMenu = dProto.showContextMenuForCacheReopen;
  7259.  
  7260.               cProto.showContextMenu_ = dProto.showContextMenuForCacheReopen_;
  7261.  
  7262.  
  7263.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - OK", tag);
  7264.  
  7265.  
  7266.  
  7267.             } else {
  7268.  
  7269.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - NG", tag);
  7270.  
  7271.             }
  7272.  
  7273.  
  7274.  
  7275.             if (ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU && typeof cProto.showContextMenu === 'function' && typeof cProto.showContextMenu_ === 'function' && !cProto.showContextMenu48 && !cProto.showContextMenu48_ && cProto.showContextMenu.length === 1 && cProto.showContextMenu_.length === 1) {
  7276.  
  7277.  
  7278.               cProto.showContextMenu48 = cProto.showContextMenu;
  7279.  
  7280.  
  7281.               cProto.showContextMenu = dProto.showContextMenuWithDisableScroll;
  7282.  
  7283.  
  7284.  
  7285.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU - OK", tag);
  7286.  
  7287.  
  7288.  
  7289.             } else {
  7290.  
  7291.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU - NG", tag);
  7292.  
  7293.             }
  7294.  
  7295.  
  7296.  
  7297.  
  7298.  
  7299.             if (ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU && typeof cProto.showContextMenu === 'function' && typeof cProto.showContextMenu_ === 'function' && !cProto.showContextMenu47 && !cProto.showContextMenu47_ && cProto.showContextMenu.length === 1 && cProto.showContextMenu_.length === 1) {
  7300.  
  7301.               cProto.showContextMenu47_ = cProto.showContextMenu_;
  7302.               cProto.showContextMenu47 = cProto.showContextMenu;
  7303.  
  7304.               cProto.__showContextMenu_mutex_unlock_isEmpty__ = dProto.__showContextMenu_mutex_unlock_isEmpty__;
  7305.               cProto.__showContextMenu_assign_lock__ = dProto.__showContextMenu_assign_lock__;
  7306.               cProto.showContextMenu = dProto.showContextMenuWithMutex;
  7307.               cProto.showContextMenu_ = dProto.showContextMenuWithMutex_;
  7308.  
  7309.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - OK", tag);
  7310.  
  7311.  
  7312.  
  7313.             } else {
  7314.  
  7315.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - NG", tag);
  7316.  
  7317.             }
  7318.  
  7319.  
  7320.  
  7321.  
  7322.           })();
  7323.  
  7324.         }
  7325.  
  7326.  
  7327.  
  7328.         console.log("[End]");
  7329.  
  7330.         console.groupEnd();
  7331.  
  7332.       }).catch(console.warn);
  7333.  
  7334.  
  7335.  
  7336.       customElements.whenDefined('tp-yt-iron-dropdown').then(() => {
  7337.  
  7338.         mightFirstCheckOnYtInit();
  7339.         groupCollapsed("YouTube Super Fast Chat", " | tp-yt-iron-dropdown hacks");
  7340.         console.log("[Begin]");
  7341.         (() => {
  7342.  
  7343.           const tag = "tp-yt-iron-dropdown";
  7344.           const dummy = document.createElement(tag);
  7345.  
  7346.           const cProto = getProto(dummy);
  7347.           if (!cProto || !cProto.attached) {
  7348.             console.warn(`proto.attached for ${tag} is unavailable.`);
  7349.             return;
  7350.           }
  7351.  
  7352.  
  7353.           if (USE_VANILLA_DEREF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf34 && fnIntegrity(cProto.__deraf) === '2.42.24') {
  7354.             cProto.__deraf_hn__ = function (sId, fn) {
  7355.               const rhKey = `_rafHandler_${sId}`;
  7356.               const m = this[rhKey] || (this[rhKey] = new WeakMap());
  7357.               if (m.has(fn)) return m.get(fn);
  7358.               const resFn = () => {
  7359.                 this.__rafs[sId] = null;
  7360.                 fn.call(this)
  7361.               };
  7362.               m.set(fn, resFn);
  7363.               m.set(resFn, resFn);
  7364.               return resFn;
  7365.             };
  7366.             cProto.__deraf34 = cProto.__deraf;
  7367.             cProto.__deraf = function (a, b) { // sId, fn
  7368.               let c = this.__rafs;
  7369.               null !== c[a] && cancelAnimationFrame(c[a]);
  7370.               c[a] = requestAnimationFrame(this.__deraf_hn__(a, b));
  7371.             };
  7372.             console.log("USE_VANILLA_DEREF - OK");
  7373.           } else {
  7374.             console.log("USE_VANILLA_DEREF - NG");
  7375.           }
  7376.  
  7377.           if (FIX_DROPDOWN_DERAF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf66) {
  7378.             cProto.__deraf66 = cProto.__deraf;
  7379.             cProto.__deraf = function (sId, fn) {
  7380.               if (this.__byPassRAF__) {
  7381.                 Promise.resolve().then(() => {
  7382.                   fn.call(this);
  7383.                 });
  7384.               }
  7385.               let r = this.__deraf66.apply(this, arguments);
  7386.               return r;
  7387.             }
  7388.             console.log("FIX_DROPDOWN_DERAF - OK");
  7389.           } else {
  7390.             console.log("FIX_DROPDOWN_DERAF - NG");
  7391.           }
  7392.  
  7393.  
  7394.           if (BOOST_MENU_OPENCHANGED_RENDERING && typeof cProto.__openedChanged === 'function' && !cProto.__mtChanged__ && fnIntegrity(cProto.__openedChanged) === '0.46.20') {
  7395.  
  7396.             let lastClose = null;
  7397.             let lastOpen = null;
  7398.             let cid = 0;
  7399.  
  7400.             cProto.__mtChanged__ = function (b) {
  7401.  
  7402.               Promise.resolve().then(() => {
  7403.                 this._applyFocus();
  7404.               }).then(() => {
  7405.                 b ? this._renderOpened() : this._renderClosed();
  7406.               }).catch(console.warn);
  7407.  
  7408.             };
  7409.  
  7410.             const __moChanged__ = () => {
  7411.               if (!cid) return;
  7412.               // console.log(553, !!lastOpen, !!lastClose);
  7413.               cid = 0;
  7414.               if (lastOpen && !lastClose && lastOpen.isAttached) {
  7415.                 lastOpen.__mtChanged__(1)
  7416.               } else if (lastClose && !lastOpen && lastClose.isAttached) {
  7417.                 lastClose.__mtChanged__(0);
  7418.               }
  7419.               lastOpen = null;
  7420.               lastClose = null;
  7421.             };
  7422.  
  7423.  
  7424.             if (typeof cProto._openedChanged === 'function' && !cProto._openedChanged66) {
  7425.               cProto._openedChanged66 = cProto._openedChanged;
  7426.               cProto._openedChanged = function () {
  7427.                 // this.__byPassRAF__ = !lastOpen ? true : false; // or just true?
  7428.                 this.__byPassRAF__ = true;
  7429.                 let r = this._openedChanged66.apply(this, arguments);
  7430.                 this.__byPassRAF__ = false;
  7431.                 return r;
  7432.               }
  7433.             }
  7434.  
  7435.             const pSetGet = (key, pdThis, pdBase) => {
  7436.               // note: this is not really a standard way for the getOwnPropertyDescriptors; but it is sufficient to make the job done
  7437.               return {
  7438.                 get: (pdThis[key] || 0).get || (pdBase[key] || 0).get,
  7439.                 set: (pdThis[key] || 0).set || (pdBase[key] || 0).set
  7440.               };
  7441.             };
  7442.  
  7443.             cProto.__modifiedMenuPropsFn__ = function () {
  7444.               const pdThis = Object.getOwnPropertyDescriptors(this.constructor.prototype)
  7445.               const pdBase = Object.getOwnPropertyDescriptors(this)
  7446.  
  7447.               const pdAutoFitOnAttach = pSetGet('autoFitOnAttach', pdThis, pdBase);
  7448.               const pdExpandSizingTargetForScrollbars = pSetGet('expandSizingTargetForScrollbars', pdThis, pdBase);
  7449.               const pdAllowOutsideScroll = pSetGet('allowOutsideScroll', pdThis, pdBase);
  7450.  
  7451.               if (pdAutoFitOnAttach.get || pdAutoFitOnAttach.set) {
  7452.                 console.warn('there is setter/getter for autoFitOnAttach');
  7453.                 return;
  7454.               }
  7455.               if (pdExpandSizingTargetForScrollbars.get || pdExpandSizingTargetForScrollbars.set) {
  7456.                 console.warn('there is setter/getter for expandSizingTargetForScrollbars');
  7457.                 return;
  7458.               }
  7459.               if (!pdAllowOutsideScroll.get || !pdAllowOutsideScroll.set) {
  7460.                 console.warn('there is NO setter-getter for allowOutsideScroll');
  7461.                 return;
  7462.               }
  7463.  
  7464.               let { autoFitOnAttach, expandSizingTargetForScrollbars, allowOutsideScroll } = this;
  7465.  
  7466.               this.__AllowOutsideScrollPD__ = pdAllowOutsideScroll;
  7467.  
  7468.               const fitEnable = CHAT_MENU_REFIT_ALONG_SCROLLING === 2;
  7469.  
  7470.               Object.defineProperties(this, {
  7471.                 autoFitOnAttach: {
  7472.                   get() {
  7473.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  7474.                     return autoFitOnAttach;
  7475.                   },
  7476.                   set(nv) {
  7477.                     autoFitOnAttach = nv;
  7478.                     return true;
  7479.                   },
  7480.                   enumerable: true,
  7481.                   configurable: true
  7482.                 }, expandSizingTargetForScrollbars: {
  7483.                   get() {
  7484.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  7485.                     return expandSizingTargetForScrollbars;
  7486.                   },
  7487.                   set(nv) {
  7488.                     expandSizingTargetForScrollbars = nv;
  7489.                     return true;
  7490.                   },
  7491.                   enumerable: true,
  7492.                   configurable: true
  7493.                 }, allowOutsideScroll: {
  7494.                   get() {
  7495.                     if (this._modifiedMenuPropOn062__) return true;
  7496.                     return allowOutsideScroll;
  7497.                   },
  7498.                   set(nv) {
  7499.                     allowOutsideScroll = nv;
  7500.                     this.__AllowOutsideScrollPD__.set.call(this, nv);
  7501.                     return true;
  7502.                   },
  7503.                   enumerable: true,
  7504.                   configurable: true
  7505.                 }
  7506.               })
  7507.             };
  7508.  
  7509.             /*
  7510.                // ***** position() to be changed. *****
  7511.               tp-yt-iron-dropdown[class], tp-yt-iron-dropdown[class] #contentWrapper, tp-yt-iron-dropdown[class] ytd-menu-popup-renderer[class] {
  7512.  
  7513.                   overflow: visible !important;
  7514.                   min-width: max-content !important;
  7515.                   max-width: max-content !important;
  7516.                   max-height: max-content !important;
  7517.                   min-height: max-content !important;
  7518.                   white-space: nowrap;
  7519.               }
  7520.  
  7521.             */
  7522.             if (FIX_MENU_POSITION_N_SIZING_ON_SHOWN && typeof cProto.position === 'function' && !cProto.position34 && typeof cProto.refit === 'function') {
  7523.  
  7524.               let m34 = 0;
  7525.               cProto.__refitByPosition__ = function () {
  7526.                 m34++;
  7527.                 if (m34 <= 0) m34 = 0;
  7528.                 if (m34 !== 1) return;
  7529.                 const hostElement = this.hostElement || this;
  7530.                 if (document.visibilityState === 'visible') {
  7531.                   const sizingTarget = this.sizingTarget;
  7532.                   if (!sizingTarget) {
  7533.                     m34 = 0;
  7534.                     return;
  7535.                   }
  7536.  
  7537.                   /*
  7538.                   let useVisibilityCollapse = true;
  7539.                   if (HTMLElement.prototype.querySelector.call(sizingTarget, 'yt-icon:empty')) {
  7540.                     useVisibilityCollapse = false;
  7541.                   }
  7542.  
  7543.                   if (useVisibilityCollapse) {
  7544.                     hostElement.style.visibility = 'collapse';
  7545.                     sizingTarget.style.visibility = 'collapse';
  7546.                   } else {
  7547.                     hostElement.setAttribute('rNgzQ', '');
  7548.                     sizingTarget.setAttribute('rNgzQ', '');
  7549.                   }
  7550.                   */
  7551.                   hostElement.setAttribute('rNgzQ', '');
  7552.                   sizingTarget.setAttribute('rNgzQ', '');
  7553.  
  7554.                   const gn = () => {
  7555.                     /*
  7556.                     if (useVisibilityCollapse) {
  7557.                       hostElement.style.visibility = '';
  7558.                       sizingTarget.style.visibility = '';
  7559.                     } else {
  7560.                       hostElement.removeAttribute('rNgzQ');
  7561.                       sizingTarget.removeAttribute('rNgzQ');
  7562.                     }
  7563.                     */
  7564.                     hostElement.removeAttribute('rNgzQ');
  7565.                     sizingTarget.removeAttribute('rNgzQ');
  7566.                   }
  7567.  
  7568.                   const an = async () => {
  7569.                     while (m34 >= 1) {
  7570.                       await renderReadyPn(sizingTarget);
  7571.                       if (this.opened && this.isAttached && sizingTarget.isConnected === true && sizingTarget === this.sizingTarget) {
  7572.                         if (sizingTarget.matches('ytd-menu-popup-renderer[slot="dropdown-content"].yt-live-chat-app')) this.refit();
  7573.                       }
  7574.                       m34--;
  7575.                     }
  7576.                     m34 = 0;
  7577.                     Promise.resolve().then(gn);
  7578.                   }
  7579.                   setTimeout(an, 4); // wait those resizing function calls
  7580.  
  7581.  
  7582.                 } else {
  7583.                   m34 = 0;
  7584.                 }
  7585.               }
  7586.               cProto.position34 = cProto.position
  7587.               cProto.position = function () {
  7588.                 if (this._positionInitialize_) {
  7589.                   this._positionInitialize_ = 0;
  7590.                   this.__refitByPosition__();
  7591.                 }
  7592.                 let r = cProto.position34.apply(this, arguments);
  7593.                 return r;
  7594.               }
  7595.               console.log("FIX_MENU_POSITION_ON_SHOWN - OK");
  7596.  
  7597.             } else {
  7598.  
  7599.               console.log("FIX_MENU_POSITION_ON_SHOWN - NG");
  7600.  
  7601.             }
  7602.  
  7603.  
  7604.  
  7605.             cProto.__openedChanged = function () {
  7606.               this._positionInitialize_ = 1;
  7607.               // this.removeAttribute('horizontal-align')
  7608.               // this.removeAttribute('vertical-align')
  7609.               if (typeof this.__menuTypeCheck__ !== 'boolean') {
  7610.                 this.__menuTypeCheck__ = true;
  7611.                 if (CHAT_MENU_SCROLL_UNLOCKING) {
  7612.                   this._modifiedMenuPropOn062__ = false;
  7613.                   // console.log(513, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  7614.                   // this.autoFitOnAttach = true;
  7615.                   // this.expandSizingTargetForScrollbars = true;
  7616.                   // this.allowOutsideScroll = true;
  7617.                   // console.log(519,Object.getOwnPropertyDescriptors(this.constructor.prototype))
  7618.                   this.__modifiedMenuPropsFn__();
  7619.                   // this.constrain= function(){}
  7620.                   // this.position= function(){}
  7621.  
  7622.                   // this.autoFitOnAttach = true;
  7623.                   // this.expandSizingTargetForScrollbars = true;
  7624.                   // this.allowOutsideScroll = true;
  7625.                 }
  7626.               }
  7627.               if (CHAT_MENU_SCROLL_UNLOCKING && this.opened) {
  7628.                 let newValue = null;
  7629.                 const positionTarget = this.positionTarget;
  7630.                 if (positionTarget && positionTarget.classList.contains('yt-live-chat-text-message-renderer')) {
  7631.                   if (this._modifiedMenuPropOn062__ === false) {
  7632.                     newValue = true;
  7633.                   }
  7634.                 } else if (this._modifiedMenuPropOn062__ === true) {
  7635.                   newValue = false;
  7636.                 }
  7637.                 if (newValue !== null) {
  7638.                   const beforeAllowOutsideScroll = this.allowOutsideScroll;
  7639.                   this._modifiedMenuPropOn062__ = newValue;
  7640.                   const afterAllowOutsideScroll = this.allowOutsideScroll;
  7641.                   if (beforeAllowOutsideScroll !== afterAllowOutsideScroll) this.__AllowOutsideScrollPD__.set.call(this, afterAllowOutsideScroll);
  7642.                 }
  7643.               }
  7644.  
  7645.               if (this.opened) {
  7646.  
  7647.                 Promise.resolve().then(() => {
  7648.  
  7649.                   this._prepareRenderOpened();
  7650.                 }).then(() => {
  7651.                   this._manager.addOverlay(this);
  7652.                   if (this._manager._overlays.length === 1) {
  7653.                     lastOpen = this;
  7654.                     lastClose = null;
  7655.                   } else {
  7656.                     return 1;
  7657.                   }
  7658.                   // if (cid) {
  7659.                   //   clearTimeout(cid);
  7660.                   //   cid = -1;
  7661.                   //   this.__moChanged__();
  7662.                   //   cid = 0;
  7663.                   // } else {
  7664.                   //   cid = -1;
  7665.                   //   this.__moChanged__();
  7666.                   //   cid = 0;
  7667.                   // }
  7668.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  7669.                   // console.log(580, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  7670.                   // cid = cid || setTimeout(__moChanged__, delay1);
  7671.                   cid = cid || requestAnimationFrame(__moChanged__);
  7672.                 }).then((r) => {
  7673.  
  7674.                   if (r) this.__mtChanged__(1);
  7675.                 }).catch(console.warn);
  7676.  
  7677.               } else {
  7678.                 Promise.resolve().then(() => {
  7679.                   this._manager.removeOverlay(this);
  7680.                   if (this._manager._overlays.length === 0) {
  7681.                     lastClose = this;
  7682.                     lastOpen = null;
  7683.                   } else {
  7684.                     return 1;
  7685.                   }
  7686.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  7687.                   // console.log(581, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  7688.                   // cid = cid || setTimeout(__moChanged__, delay1);
  7689.                   cid = cid || requestAnimationFrame(__moChanged__);
  7690.                 }).then((r) => {
  7691.                   if (r) this.__mtChanged__(0);
  7692.                 }).catch(console.warn);
  7693.  
  7694.               }
  7695.  
  7696.             }
  7697.             console.log("BOOST_MENU_OPENCHANGED_RENDERING - OK");
  7698.  
  7699.           } else {
  7700.  
  7701.             assertor(() => fnIntegrity(cProto.__openedChanged, '0.46.20'));
  7702.             console.log("FIX_MENU_REOPEN_RENDER_PERFORMANC_1 - NG");
  7703.  
  7704.           }
  7705.  
  7706.  
  7707.           if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK && typeof cProto.__openedChanged === 'function' && !cProto.__openedChanged82) {
  7708.  
  7709.             cProto.__openedChanged82 = cProto.__openedChanged;
  7710.  
  7711.  
  7712.             cProto.__openedChanged = function () {
  7713.  
  7714.               // currentMenuPivotWR = null;
  7715.               // console.log(1480, '__openedChanged.A', this.positionTarget)
  7716.  
  7717.  
  7718.  
  7719.               // if (this.opened && this.positionTarget) {
  7720.  
  7721.               //   const positionTarget = this.positionTarget;
  7722.               //   console.log(1480, '__openedChanged.B', positionTarget)
  7723.               //   currentMenuPivotWR = mWeakRef(positionTarget);
  7724.  
  7725.               // }
  7726.  
  7727.               const positionTarget = this.positionTarget;
  7728.               currentMenuPivotWR = positionTarget ? mWeakRef(positionTarget) : null;
  7729.               return this.__openedChanged82.apply(this, arguments);
  7730.             }
  7731.           }
  7732.  
  7733.  
  7734.           // if(FIX_MENU_CAPTURE_SCROLL && typeof cProto.__onCaptureScroll === 'function' && !cProto.__onCaptureScroll66){
  7735.  
  7736.           //   cProto.__onCaptureScroll66 = cProto.__onCaptureScroll;
  7737.  
  7738.           //   cProto.__onCaptureScroll = function(a){
  7739.  
  7740.           //     const q = true;
  7741.           //     if(this.scrollAction === 'lock'  && q && this.opened){
  7742.  
  7743.           //       // console.log(9107, this.scrollAction, this.__isAnimating, this.opened, a); // lock; __isAnimating = false
  7744.           //       async function af() {
  7745.           //         this.__isAnimating && this._finishRenderOpened();
  7746.           //         if (!this.opened) return;
  7747.           //         this.__restoreScrollPosition();
  7748.           //         await new Promise(r => requestAnimationFrame(r));
  7749.           //         if (!this.opened) return;
  7750.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  7751.           //         if (!this.opened) return;
  7752.           //         this.__restoreScrollPosition();
  7753.           //         await new Promise(r => requestAnimationFrame(r));
  7754.           //         if (!this.opened) return;
  7755.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  7756.           //         if (!this.opened) return;
  7757.           //         this.opened && !this.__isAnimating && this.refit();
  7758.           //       }
  7759.           //       Promise.resolve().then(af);
  7760.  
  7761.           //        return cProto.__onCaptureScroll66.apply(this, arguments);
  7762.           //     }else{
  7763.  
  7764.           //       // console.log(9102, this.scrollAction, this.__isAnimating, this.opened, a); // lock
  7765.  
  7766.           //       return cProto.__onCaptureScroll66.apply(this, arguments);
  7767.           //     }
  7768.           //   }
  7769.           //   console.log("FIX_MENU_CAPTURE_SCROLL - OK");
  7770.           // }else{
  7771.           //   console.log("FIX_MENU_CAPTURE_SCROLL - NG");
  7772.  
  7773.           // }
  7774.  
  7775.  
  7776.         })();
  7777.  
  7778.         console.log("[End]");
  7779.  
  7780.         console.groupEnd();
  7781.  
  7782.       }).catch(console.warn);
  7783.  
  7784.  
  7785.  
  7786.  
  7787.  
  7788.  
  7789.  
  7790.  
  7791.       /*
  7792.  
  7793.  
  7794.  
  7795.  
  7796.  
  7797.           var FU = function() {
  7798.               var a = this;
  7799.               this.nextHandle_ = 1;
  7800.               this.clients_ = {};
  7801.               this.JSC$10323_callbacks_ = {};
  7802.               this.unsubscribeAsyncHandles_ = {};
  7803.               this.subscribe = vl(function(b, c, d) {
  7804.                   var e = Geb(b);
  7805.                   if (e in a.clients_)
  7806.                       e in a.unsubscribeAsyncHandles_ && Jq.cancel(a.unsubscribeAsyncHandles_[e]);
  7807.                   else {
  7808.                       a: {
  7809.                           var h = Geb(b), l;
  7810.                           for (l in a.unsubscribeAsyncHandles_) {
  7811.                               var m = a.clients_[l];
  7812.                               if (m instanceof KO) {
  7813.                                   delete a.clients_[l];
  7814.                                   delete a.JSC$10323_callbacks_[l];
  7815.                                   Jq.cancel(a.unsubscribeAsyncHandles_[l]);
  7816.                                   delete a.unsubscribeAsyncHandles_[l];
  7817.                                   i6a(m);
  7818.                                   m.objectId_ = new FQa(h);
  7819.                                   m.register();
  7820.                                   d = m;
  7821.                                   break a
  7822.                               }
  7823.                           }
  7824.                           d.objectSource = b.invalidationId.objectSource;
  7825.                           d.objectId = h;
  7826.                           if (b = b.webAuthConfigurationData)
  7827.                               b.multiUserSessionIndex && (d.sessionIndex = parseInt(b.multiUserSessionIndex, 10)),
  7828.                               b.pageId && (d.pageId = b.pageId);
  7829.                           d = new KO(d,a.handleInvalidationData_.bind(a));
  7830.                           d.register()
  7831.                       }
  7832.                       a.clients_[e] = d;
  7833.                       a.JSC$10323_callbacks_[e] = {}
  7834.                   }
  7835.                   d = a.nextHandle_++;
  7836.                   a.JSC$10323_callbacks_[e][d] = c;
  7837.                   return d
  7838.               })
  7839.           };
  7840.           FU.prototype.unsubscribe = function(a, b) {
  7841.               var c = Geb(a);
  7842.               if (c in this.JSC$10323_callbacks_ && (delete this.JSC$10323_callbacks_[c][b],
  7843.               !this.JSC$10323_callbacks_[c].length)) {
  7844.                   var d = this.clients_[c];
  7845.                   b = Jq.run(function() {
  7846.                       ei(d);
  7847.                       delete this.clients_[c];
  7848.                       delete this.unsubscribeAsyncHandles_[c]
  7849.                   }
  7850.                   .bind(this));
  7851.                   this.unsubscribeAsyncHandles_[c] = b
  7852.               }
  7853.           }
  7854.           ;
  7855.  
  7856.  
  7857.       */
  7858.  
  7859.  
  7860.  
  7861.  
  7862.       const onManagerFound = (dummyManager) => {
  7863.         if (!dummyManager || typeof dummyManager !== 'object') return;
  7864.  
  7865.         const mgrProto = dummyManager.constructor.prototype;
  7866.  
  7867.         let keyCallbackStore = '';
  7868.         for (const [key, v] of Object.entries(dummyManager)) {
  7869.           if (key.includes('_callbacks_')) keyCallbackStore = key;
  7870.         }
  7871.  
  7872.         if (!keyCallbackStore || typeof mgrProto.unsubscribe !== 'function' || mgrProto.unsubscribe.length !== 2) return;
  7873.  
  7874.         if (mgrProto.unsubscribe16) return;
  7875.  
  7876.         mgrProto.unsubscribe16 = mgrProto.unsubscribe;
  7877.  
  7878.         groupCollapsed("YouTube Super Fast Chat", " | *live-chat-manager* hacks");
  7879.         console.log("[Begin]");
  7880.  
  7881.  
  7882.         // const isEmptyObject = (a) => Object.keys(a).length === 0;
  7883.         const isEmptyObject = ((obj) => (firstKey(obj) === null));
  7884.  
  7885.         const idMapper = new Map();
  7886.  
  7887.         const convertId = function (objectId) {
  7888.           if (!objectId || typeof objectId !== 'string') return null;
  7889.  
  7890.           let result = idMapper.get(objectId)
  7891.           if (result) return result;
  7892.           result = atob(objectId.replace(/-/g, "+").replace(/_/g, "/"));
  7893.           idMapper.set(objectId, result)
  7894.           return result;
  7895.         }
  7896.  
  7897.  
  7898.         const rafHandleHolder = [];
  7899.  
  7900.         let pzw = 0;
  7901.         let lza = 0;
  7902.         const rafHandlerFn = () => {
  7903.           pzw = 0;
  7904.           if (rafHandleHolder.length === 1) {
  7905.             const f = rafHandleHolder[0];
  7906.             rafHandleHolder.length = 0;
  7907.             f();
  7908.           } else if (rafHandleHolder.length > 1) {
  7909.             const arr = rafHandleHolder.slice(0);
  7910.             rafHandleHolder.length = 0;
  7911.             for (const fn of arr) fn();
  7912.           }
  7913.         };
  7914.  
  7915.  
  7916.         if (CHANGE_MANAGER_UNSUBSCRIBE) {
  7917.  
  7918.           const checkIntegrityForSubscribe = (mgr) => {
  7919.             if (mgr
  7920.               && typeof mgr.unsubscribe16 === 'function' && mgr.unsubscribe16.length === 2
  7921.               && typeof mgr.subscribe18 === 'function' && (mgr.subscribe18.length === 0 || mgr.subscribe18.length === 3)) {
  7922.  
  7923.               const ns = new Set(Object.keys(mgr));
  7924.               const ms = new Set(Object.keys(mgr.constructor.prototype));
  7925.  
  7926.               if (ns.size >= 6 && ms.size >= 4) {
  7927.                 // including 'subscribe18'
  7928.                 // 'unsubscribe16', 'subscribe19'
  7929.  
  7930.                 let r = 0;
  7931.                 for (const k of ['nextHandle_', 'clients_', keyCallbackStore, 'unsubscribeAsyncHandles_', 'subscribe', 'subscribe18']) {
  7932.                   r += ns.has(k) ? 1 : 0;
  7933.                 }
  7934.                 for (const k of ['unsubscribe', 'handleInvalidationData_', 'unsubscribe16', 'subscribe19']) {
  7935.                   r += ms.has(k) ? 1 : 0;
  7936.                 }
  7937.                 if (r === 10) {
  7938.                   const isObject = (c) => (c || 0).constructor === Object;
  7939.  
  7940.                   if (isObject(mgr['clients_']) && isObject(mgr[keyCallbackStore]) && isObject(mgr['unsubscribeAsyncHandles_'])) {
  7941.  
  7942.                     return true;
  7943.                   }
  7944.  
  7945.  
  7946.                 }
  7947.  
  7948.               }
  7949.  
  7950.  
  7951.             }
  7952.             return false;
  7953.           }
  7954.  
  7955.           mgrProto.subscribe19 = function (o, f, opts) {
  7956.  
  7957.             const ct_clients_ = this.clients_ || 0;
  7958.             const ct_handles_ = this.unsubscribeAsyncHandles_ || 0;
  7959.  
  7960.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.subscribe18.apply(this, arguments);
  7961.  
  7962.             let objectId = ((o || 0).invalidationId || 0).objectId;
  7963.             if (!objectId) return this.subscribe18.apply(this, arguments);
  7964.             objectId = convertId(objectId);
  7965.  
  7966.             // console.log('subscribe', objectId, ct_clients_[objectId], arguments);
  7967.  
  7968.             if (ct_clients_[objectId]) {
  7969.               if (ct_handles_[objectId] < 0) delete ct_handles_[objectId];
  7970.             }
  7971.  
  7972.             return this.subscribe18.apply(this, arguments);
  7973.           }
  7974.  
  7975.           mgrProto.unsubscribe = function (o, d) {
  7976.             if (!this.subscribe18 && typeof this.subscribe === 'function') {
  7977.               this.subscribe18 = this.subscribe;
  7978.               this.subscribe = this.subscribe19;
  7979.               this.__doCustomSubscribe__ = checkIntegrityForSubscribe(this);
  7980.             }
  7981.             const ct_clients_ = this.clients_;
  7982.             const ct_handles_ = this.unsubscribeAsyncHandles_;
  7983.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.unsubscribe16.apply(this, arguments);
  7984.  
  7985.             let objectId = ((o || 0).invalidationId || 0).objectId;
  7986.             if (!objectId) return this.unsubscribe16.apply(this, arguments);
  7987.  
  7988.             objectId = convertId(objectId);
  7989.  
  7990.  
  7991.             // console.log('unsubscribe', objectId, ct_clients_[objectId], arguments);
  7992.  
  7993.             const callbacks = this[keyCallbackStore] || 0;
  7994.             const callbackObj = callbacks[objectId] || 0;
  7995.  
  7996.  
  7997.             if (callbackObj && (delete callbackObj[d], isEmptyObject(callbackObj))) {
  7998.               const w = ct_clients_[objectId];
  7999.               --lza;
  8000.               if (lza < -1e9) lza = -1;
  8001.               const qta = lza;
  8002.               rafHandleHolder.push(() => {
  8003.                 if (qta === ct_handles_[objectId]) {
  8004.                   const o = {
  8005.                     callbacks, callbackObj,
  8006.                     client: ct_clients_[objectId],
  8007.                     handle: ct_handles_[objectId]
  8008.                   };
  8009.                   let p = 0;
  8010.                   try {
  8011.                     if (ct_clients_[objectId] === w) {
  8012.                       w && "function" === typeof w.dispose && w.dispose();
  8013.                       delete ct_clients_[objectId];
  8014.                       delete ct_handles_[objectId];
  8015.                       p = 1;
  8016.                     } else {
  8017.                       // w && "function" === typeof w.dispose && w.dispose();
  8018.                       // delete ct_clients_[objectId];
  8019.                       // delete ct_handles_[objectId];
  8020.                       p = 2;
  8021.                     }
  8022.                   } catch (e) {
  8023.                     console.warn(e);
  8024.                   }
  8025.                   console.log(`unsubscribed: ${p}`, this, o);
  8026.                 }
  8027.               });
  8028.               ct_handles_[objectId] = qta;
  8029.               if (pzw === 0) {
  8030.                 pzw = requestAnimationFrame(rafHandlerFn);
  8031.               }
  8032.             }
  8033.           }
  8034.  
  8035.  
  8036.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - OK")
  8037.  
  8038.         } else {
  8039.  
  8040.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - NG")
  8041.         }
  8042.  
  8043.         console.log("[End]");
  8044.  
  8045.         console.groupEnd();
  8046.  
  8047.       }
  8048.  
  8049.  
  8050.  
  8051.       /*
  8052.  
  8053.  
  8054.               a.prototype.async = function(e, h) {
  8055.                   return 0 < h ? Iq.run(e.bind(this), h) : ~Kq.run(e.bind(this))
  8056.               }
  8057.               ;
  8058.               a.prototype.cancelAsync = function(e) {
  8059.                   0 > e ? Kq.cancel(~e) : Iq.cancel(e)
  8060.               }
  8061.  
  8062.       */
  8063.  
  8064.  
  8065.       (FASTER_ICON_RENDERING && Promise.all(
  8066.         [
  8067.           customElements.whenDefined("yt-icon-shape"),
  8068.           customElements.whenDefined("yt-icon")
  8069.           //  document.createElement('icon-shape'),
  8070.         ]
  8071.       )).then(() => {
  8072.         let cq = 0;
  8073.         let dummys = [document.createElement('yt-icon-shape'), document.createElement('yt-icon')]
  8074.         for (const dummy of dummys) {
  8075.           let cProto = getProto(dummy);
  8076.           if (cProto && typeof cProto.shouldRenderIconShape === 'function' && !cProto.shouldRenderIconShape571 && cProto.shouldRenderIconShape.length === 1) {
  8077.             assertor(() => fnIntegrity(cProto.shouldRenderIconShape, '1.70.38'));
  8078.             cq++;
  8079.             cProto.shouldRenderIconShape571 = cProto.shouldRenderIconShape;
  8080.             cProto.shouldRenderIconShape = function (a) {
  8081.               if (this.isAnimatedIcon) return this.shouldRenderIconShape571(a);
  8082.               if (!this.iconType || !this.iconShapeData) return this.shouldRenderIconShape571(a);
  8083.               if (!this.iconName) return this.shouldRenderIconShape571(a);
  8084.               return false;
  8085.               // console.log(1051, this.iconType)
  8086.               // console.log(1052, this.iconShapeData)
  8087.               // console.log(1053, this.isAnimatedIcon)
  8088.             }
  8089.           }
  8090.           // if(cProto && cProto.switchTemplateAtRegistration){
  8091.           //   cProto.switchTemplateAtRegistration = false;
  8092.           // }
  8093.         }
  8094.         if (cq === 1) {
  8095.           console.log("modified shouldRenderIconShape - Y")
  8096.         } else {
  8097.           console.log("modified shouldRenderIconShape - N", cq)
  8098.         }
  8099.       });
  8100.  
  8101.       customElements.whenDefined("yt-invalidation-continuation").then(() => {
  8102.  
  8103.         let __dummyManager__ = null;
  8104.  
  8105.         mightFirstCheckOnYtInit();
  8106.         groupCollapsed("YouTube Super Fast Chat", " | yt-invalidation-continuation hacks");
  8107.         console.log("[Begin]");
  8108.         (() => {
  8109.  
  8110.           const tag = "yt-invalidation-continuation"
  8111.           const dummy = document.createElement(tag);
  8112.  
  8113.           const cProto = getProto(dummy);
  8114.           if (!cProto || !cProto.attached) {
  8115.             console.warn(`proto.attached for ${tag} is unavailable.`);
  8116.             return;
  8117.           }
  8118.  
  8119.           const dummyManager = insp(dummy).manager_ || 0;
  8120.           __dummyManager__ = dummyManager;
  8121.  
  8122.           if (CHANGE_DATA_FLUSH_ASYNC && typeof cProto.async === 'function' && !cProto.async71 && cProto.async.length === 2 && typeof cProto.cancelAsync === 'function' && !cProto.cancelAsync71 && cProto.cancelAsync.length === 1) {
  8123.  
  8124.  
  8125.             const rafHub = new RAFHub();
  8126.  
  8127.             rafHub.keepRAF = true;
  8128.             cProto.async71 = cProto.async;
  8129.             cProto.cancelAsync71 = cProto.cancelAsync;
  8130.  
  8131.             // mostly for subscription timeoutMs 10000ms
  8132.             let mcw = 1; // 1, 3, 5, ...
  8133.             let arr = new Map();
  8134.  
  8135.             let __asyncInited__ = 0;
  8136.             let __timeoutStartId__ = null;
  8137.             const __asyncInit__ = () => {
  8138.  
  8139.               if (__asyncInited__) return;
  8140.               __asyncInited__ = 1;
  8141.  
  8142.               __timeoutStartId__ = setTimeout(() => { });
  8143.               mcw = __timeoutStartId__ * 2 + 1;
  8144.  
  8145.               setInterval(() => {
  8146.  
  8147.                 if (!arr.length) return;
  8148.  
  8149.                 const p = Date.now();
  8150.                 let deleteKeys = [];
  8151.                 arr.forEach((entry, key) => {
  8152.  
  8153.  
  8154.                   if (entry.cid === -1) {
  8155.                     entry.cid = -2;
  8156.                   } else if (entry.cid === -2) {
  8157.  
  8158.                     let offset = p - entry.add
  8159.                     if (offset < 0) offset = 0;
  8160.                     let delay2 = entry.delay - offset;
  8161.                     if (delay2 < 0) delay2 = 0;
  8162.                     entry.cid = setTimeout(entry.q(), delay2);
  8163.                     entry.q = null;
  8164.  
  8165.                   } else if (entry.add + entry.delay < p) {
  8166.                     deleteKeys.push(key);
  8167.  
  8168.                   }
  8169.  
  8170.                 })
  8171.  
  8172.                 for (const key of deleteKeys) arr.delete(key);
  8173.  
  8174.               }, 2000)
  8175.  
  8176.             }
  8177.  
  8178.  
  8179.  
  8180.  
  8181.             cProto.async = function (e, h) {
  8182.  
  8183.               if (!(0 < h)) return this.async71(e, h); // unknown timing Fn
  8184.  
  8185.               if (h < 8000) return this.async71(e, h) * 2; // native setTimeout
  8186.  
  8187.               if (typeof h !== 'number') return this.async71(e, h); // exceptional case
  8188.  
  8189.  
  8190.               if (!this.__asyncInited__) {
  8191.                 this.__asyncInited__ = 1;
  8192.                 __asyncInit__();
  8193.               }
  8194.               mcw += 2; // 2K+3, 2K+4, ...
  8195.               if (mcw > 1e9) mcw = mcw % 1e4;
  8196.               const cid = mcw;
  8197.               const q = () => {
  8198.                 return () => {
  8199.                   console.log('async h > 8000');
  8200.                   e.call(this);
  8201.                 }
  8202.               }
  8203.               // setTimeout(q, delay)
  8204.               arr.set(cid, {
  8205.                 cid: -1, // -1 -> -2 -> cid
  8206.                 add: Date.now(),
  8207.                 q,
  8208.                 delay: h
  8209.               });
  8210.               // console.log('cid-async', cid)
  8211.               return cid;
  8212.  
  8213.             }
  8214.  
  8215.  
  8216.             cProto.cancelAsync = function (e) {
  8217.  
  8218.               if (typeof e !== 'number') return this.cancelAsync71(e); // exceptional case
  8219.  
  8220.               // console.log('cid-unasync', e)
  8221.  
  8222.               if (0 > e) return this.cancelAsync71(e); // unknown timing fn
  8223.  
  8224.               if (e > __timeoutStartId__ * 2) { // __timeoutStartId__ is recorded and min is 2K+1
  8225.  
  8226.                 if ((e % 2) === 0) return this.cancelAsync71(e / 2); // 2(K+1), 2(K+2), ...
  8227.  
  8228.                 if (!arr.has(e)) return; // duplciated cancel
  8229.  
  8230.                 const entry = arr.get(e);
  8231.                 if (entry.cid < 0) {
  8232.                   entry.cid = 0;
  8233.                   arr.delete(e);
  8234.                 } else {
  8235.                   clearTimeout(entry.cid); // cid >= 1
  8236.                   entry.cid = 0;
  8237.                   arr.delete(e);
  8238.                 }
  8239.  
  8240.               } else {
  8241.  
  8242.                 return this.cancelAsync71(e);
  8243.  
  8244.               }
  8245.  
  8246.             }
  8247.  
  8248.             console.log("CHANGE_DATA_FLUSH_ASYNC - OK");
  8249.  
  8250.           } else {
  8251.             console.log("CHANGE_DATA_FLUSH_ASYNC - NG");
  8252.  
  8253.           }
  8254.  
  8255.         })();
  8256.  
  8257.         console.log("[End]");
  8258.  
  8259.         console.groupEnd();
  8260.  
  8261.  
  8262.  
  8263.         onManagerFound(__dummyManager__);
  8264.  
  8265.       }).catch(console.warn);
  8266.  
  8267.  
  8268.  
  8269.  
  8270.       if (INTERACTIVITY_BACKGROUND_ANIMATION >= 1) {
  8271.  
  8272.  
  8273.         customElements.whenDefined("yt-live-interactivity-component-background").then(() => {
  8274.  
  8275.  
  8276.           mightFirstCheckOnYtInit();
  8277.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-interactivity-component-background hacks");
  8278.           console.log("[Begin]");
  8279.           (() => {
  8280.  
  8281.             const tag = "yt-live-interactivity-component-background"
  8282.             const dummy = document.createElement(tag);
  8283.  
  8284.             const cProto = getProto(dummy);
  8285.             if (!cProto || !cProto.attached) {
  8286.               console.warn(`proto.attached for ${tag} is unavailable.`);
  8287.               return;
  8288.             }
  8289.  
  8290.  
  8291.             cProto.__toStopAfterRun__ = function (hostElement) {
  8292.               let mo = new MutationObserver(() => {
  8293.                 mo.disconnect();
  8294.                 mo.takeRecords();
  8295.                 mo = null;
  8296.                 this.lottieAnimation && this.lottieAnimation.stop(); // primary
  8297.                 foregroundPromiseFn().then(() => { // if the lottieAnimation is started with rAf triggering
  8298.                   this.lottieAnimation && this.lottieAnimation.stop(); // fallback
  8299.                 });
  8300.               });
  8301.               mo.observe(hostElement, { subtree: true, childList: true });
  8302.             }
  8303.  
  8304.             if (INTERACTIVITY_BACKGROUND_ANIMATION >= 1 && typeof cProto.maybeLoadAnimationBackground === 'function' && !cProto.maybeLoadAnimationBackground77 && cProto.maybeLoadAnimationBackground.length === 0) {
  8305.  
  8306.               cProto.maybeLoadAnimationBackground77 = cProto.maybeLoadAnimationBackground;
  8307.               cProto.maybeLoadAnimationBackground = function () {
  8308.                 let toRun = true;
  8309.                 let stopAfterRun = false;
  8310.                 if (!this.__bypassDisableAnimationBackground__) {
  8311.                   let doFix = false;
  8312.                   if (INTERACTIVITY_BACKGROUND_ANIMATION === 1) {
  8313.                     if (!this.lottieAnimation) {
  8314.                       doFix = true;
  8315.                     }
  8316.                   } else if (INTERACTIVITY_BACKGROUND_ANIMATION === 2) {
  8317.                     doFix = true;
  8318.                   }
  8319.                   if (doFix) {
  8320.                     if (this.useAnimationBackground === true) {
  8321.                       console.log('DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION', this.lottieAnimation);
  8322.                     }
  8323.                     toRun = true;
  8324.                     stopAfterRun = true;
  8325.                   }
  8326.                 }
  8327.                 if (toRun) {
  8328.                   if (stopAfterRun && (this.hostElement instanceof HTMLElement)) {
  8329.                     this.__toStopAfterRun__(this.hostElement); // primary
  8330.                   }
  8331.                   const r = this.maybeLoadAnimationBackground77.apply(this, arguments);
  8332.                   if (stopAfterRun && this.lottieAnimation) {
  8333.                     this.lottieAnimation.stop(); // fallback if no mutation
  8334.                   }
  8335.                   return r;
  8336.                 }
  8337.               }
  8338.  
  8339.               console.log(`INTERACTIVITY_BACKGROUND_ANIMATION${INTERACTIVITY_BACKGROUND_ANIMATION} - OK`);
  8340.  
  8341.             } else {
  8342.               console.log(`INTERACTIVITY_BACKGROUND_ANIMATION${INTERACTIVITY_BACKGROUND_ANIMATION} - NG`);
  8343.  
  8344.             }
  8345.  
  8346.           })();
  8347.  
  8348.           console.log("[End]");
  8349.  
  8350.           console.groupEnd();
  8351.  
  8352.  
  8353.         }).catch(console.warn);
  8354.  
  8355.       }
  8356.  
  8357.  
  8358.     }
  8359.  
  8360.  
  8361.  
  8362.  
  8363.     promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  8364.  
  8365.     const fixJsonParse = () => {
  8366.  
  8367.       let p1 = window.onerror;
  8368.  
  8369.       try {
  8370.         JSON.parse("{}");
  8371.       } catch (e) {
  8372.         console.warn(e);
  8373.       }
  8374.  
  8375.       let p2 = window.onerror;
  8376.  
  8377.       if (p1 !== p2) {
  8378.  
  8379.  
  8380.         console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | JS Engine Issue Found"}`,
  8381.           "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  8382.           "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  8383.         );
  8384.  
  8385.         console.warn("\nJSON.parse is hacked (e.g. Brave's script injection) which causes window.onerror changes on every JSON.parse call.\nPlease install https://greasyfork.org/scripts/473972-youtube-js-engine-tamer to fix the issue.\n");
  8386.  
  8387.         console.groupEnd();
  8388.  
  8389.       }
  8390.  
  8391.     }
  8392.  
  8393.     if (CHECK_JSONPRUNE) {
  8394.       promiseForCustomYtElementsReady.then(fixJsonParse);
  8395.     }
  8396.  
  8397.   });
  8398.  
  8399.  
  8400.  
  8401. })({ IntersectionObserver });