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YouTube 超快聊天

YouTube直播聊天的终极性能提升

目前为 2023-08-30 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.54.7
  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. //
  19. // @compatible          firefox Violentmonkey
  20. // @compatible          firefox Tampermonkey
  21. // @compatible          firefox FireMonkey
  22. // @compatible          chrome Violentmonkey
  23. // @compatible          chrome Tampermonkey
  24. // @compatible          opera Violentmonkey
  25. // @compatible          opera Tampermonkey
  26. // @compatible          safari Stay
  27. // @compatible          edge Violentmonkey
  28. // @compatible          edge Tampermonkey
  29. // @compatible          brave Violentmonkey
  30. // @compatible          brave Tampermonkey
  31. //
  32. // @description         Ultimate Performance Boost for YouTube Live Chats
  33. // @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
  34. // @description:zh-TW   YouTube直播聊天的終極性能提升
  35. // @description:zh-CN   YouTube直播聊天的终极性能提升
  36. //
  37. // ==/UserScript==
  38.  
  39. ((__CONTEXT__) => {
  40.   'use strict';
  41.  
  42.   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
  43.   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.
  44.   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
  45.  
  46.   const ENABLE_NO_SMOOTH_TRANSFORM = true;                // Depends on whether you want the animation effect for new chat messages
  47.   const USE_OPTIMIZED_ON_SCROLL_ITEMS = true;             // TRUE for the majority
  48.   const USE_WILL_CHANGE_CONTROLLER = false;               // FALSE for the majority
  49.   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.
  50.   const ENABLE_OVERFLOW_ANCHOR_PREFERRED = true;          // Enable `overflow-anchor: auto` to lock the scroll list at the bottom for no smooth transform.
  51.  
  52.   const FIX_SHOW_MORE_BUTTON_LOCATION = true;             // When there are voting options (bottom panel), move the "show more" button to the top.
  53.   const FIX_INPUT_PANEL_OVERFLOW_ISSUE = true;            // When the super chat button is flicking with color, the scrollbar might come out.
  54.   const FIX_INPUT_PANEL_BORDER_ISSUE = true;              // No border should be allowed if there is an empty input panel.
  55.   const SET_CONTAIN_FOR_CHATROOM = true;                  // Rendering hacks (`contain`) for chatroom elements. [ General ]
  56.  
  57.   const FORCE_CONTENT_VISIBILITY_UNSET = true;            // Content-visibility should be always VISIBLE for high performance and great rendering.
  58.   const FORCE_WILL_CHANGE_UNSET = true;                   // Will-change should be always UNSET (auto) for high performance and low energy impact.
  59.  
  60.   // Replace requestAnimationFrame timers with custom implementation
  61.   const ENABLE_RAF_HACK_TICKERS = true;           // When there is a ticker
  62.   const ENABLE_RAF_HACK_DOCKED_MESSAGE = true;    // To be confirmed
  63.   const ENABLE_RAF_HACK_INPUT_RENDERER = true;    // To be confirmed
  64.   const ENABLE_RAF_HACK_EMOJI_PICKER = true;      // When changing the page of the emoji picker
  65.  
  66.   // Force rendering all the character subsets of the designated font(s) before messages come (Pre-Rendering of Text)
  67.   const ENABLE_FONT_PRE_RENDERING_PREFERRED = 1 | 2 | 4 | 8 | 16;
  68.  
  69.   // Backdrop `filter: blur(4px)` inside the iframe can extend to the whole page, causing a negative visual impact on the video you are watching.
  70.   const NO_BACKDROP_FILTER_WHEN_MENU_SHOWN = true;
  71.  
  72.   // Data Manipulation for Participants (Participant List)
  73.   // << if DO_PARTICIPANT_LIST_HACKS >>
  74.   const DO_PARTICIPANT_LIST_HACKS = true;                     // TRUE for the majority
  75.   const SHOW_PARTICIPANT_CHANGES_IN_CONSOLE = false;          // Just too annoying to show them all in popular chat
  76.   const CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = true;  // Only consider changes in renderable content (not concerned with the last chat message of the participants)
  77.   const PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED = true;
  78.   // << end >>
  79.  
  80.   // show more button
  81.   const ENABLE_SHOW_MORE_BLINKER = true;                      // BLINK WHEN NEW MESSAGES COME
  82.  
  83.   // faster stampDomArray_ for participants list creation
  84.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL = 1;            // 0 - OFF; 1 - ON; 2 - ON(PARTICIPANTS_LIST ONLY)
  85.   const USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET = false;
  86.  
  87.   // reuse yt components
  88.   const ENABLE_FLAGS_REUSE_COMPONENTS = true;
  89.  
  90.   // images <Group#I01>
  91.   const AUTHOR_PHOTO_SINGLE_THUMBNAIL = 1;  // 0 - disable; 1- smallest; 2- largest
  92.   const EMOJI_IMAGE_SINGLE_THUMBNAIL = 1;   // 0 - disable; 1- smallest; 2- largest
  93.   const LEAST_IMAGE_SIZE = 48;              // minium size = 48px
  94.  
  95.   const DO_LINK_PREFETCH = true;                      // DO NOT CHANGE
  96.   // << if DO_LINK_PREFETCH >>
  97.   const ENABLE_BASE_PREFETCHING = true;               // (SUB-)DOMAIN | dns-prefetch & preconnect
  98.   const ENABLE_PRELOAD_THUMBNAIL = true;              // subresource (prefetch) [LINK for Images]
  99.   const PREFETCH_LIMITED_SIZE_EMOJI = 512;            // DO NOT CHANGE THIS
  100.   const PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO = 68;      // DO NOT CHANGE THIS
  101.   // << end >>
  102.  
  103.   const FIX_SETSRC_AND_THUMBNAILCHANGE_ = true;       // Function Replacement for yt-img-shadow....
  104.   const FIX_THUMBNAIL_DATACHANGED = true;             // Function Replacement for yt-live-chat-author-badge-renderer..dataChanged
  105.   // const REMOVE_PRELOADAVATARFORADDACTION = false;      // Function Replacement for yt-live-chat-renderer..preloadAvatarForAddAction
  106.  
  107.   const FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION = true;     // important [depends on <Group#I01>]
  108.   const FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT = true;  // [depends on <Group#I01>]
  109.  
  110.   const ATTEMPT_ANIMATED_TICKER_BACKGROUND = 'steps'   // false OR '' for disabled, 'linear', 'steps' for easing-function
  111.   // << if ATTEMPT_ANIMATED_TICKER_BACKGROUND >>
  112.   // BROWSER SUPPORT: Chrome 75+, Edge 79+, Safari 13.1+, Firefox 63+, Opera 62+
  113.   const TICKER_MAX_STEPS_LIMIT = 500;                       //  NOT LESS THAN 5 STEPS!!
  114.   // [limiting 500 max steps] is recommended for "confortable visual change"
  115.   //      min. step increment 0.2% => max steps: 500 =>  800ms per each update
  116.   //      min. step increment 0.5% => max steps: 200 => 1000ms per each update
  117.   //      min. step increment 1.0% => max steps: 100 => 1000ms per each update
  118.   //      min. step increment 2.5% => max steps:  40 => 1000ms per each update
  119.   //      min. step increment 5.0% => max steps:  20 => 1250ms per each update
  120.   const ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX = true;    // for video playback's ticker issue. [ Playback Replay - Pause at Middle - Backwards Seeking ]
  121.   // << end >>
  122.  
  123.   const FIX_TOOLTIP_DISPLAY = true;
  124.   const USE_VANILLA_DEREF = true;
  125.   const FIX_DROPDOWN_DERAF = true;                        // DONT CHANGE
  126.  
  127.  
  128.   const CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true;        // cache the menu data and used for the next reopen
  129.   const ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU = true; // pause auto scroll faster when the context menu is about to show
  130.   const ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU = true;        // avoid multiple requests on the same time
  131.  
  132.   const BOOST_MENU_OPENCHANGED_RENDERING = true;
  133.   const FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK = true;  // click again = close
  134.   const PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN = true; // require CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true
  135.   // const FIX_MENU_CAPTURE_SCROLL = true;
  136.   const CHAT_MENU_REFIT_ALONG_SCROLLING = 0;        // 0 for locking / default; 1 for unlocking only; 2 for unlocking and refit
  137.  
  138.   const RAF_FIX_keepScrollClamped = true;
  139.   const RAF_FIX_scrollIncrementally = 2;            // 0: no action; 1: basic fix; 2: also fix scroll position
  140.  
  141.   // << if BOOST_MENU_OPENCHANGED_RENDERING >>
  142.   const FIX_MENU_POSITION_N_SIZING_ON_SHOWN = 1;       // correct size and position when the menu dropdown opens
  143.  
  144.   const DE_JSONPRUNE_FOR_readyStateChangeHandler_ = 1; // jsonPrune for Ad-Blocking is not applicable to live_chat streaming
  145.   // << end >>
  146.  
  147.   // const LIVE_CHAT_FLUSH_ON_FOREGROUND_ONLY = false;
  148.  
  149.   const CHANGE_DATA_FLUSH_ASYNC = true;
  150.   const CHANGE_MANAGER_UNSUBSCRIBE = true;
  151.  
  152.   const INTERACTIVITY_BACKGROUND_ANIMATION = 1;         // mostly for pinned message
  153.   // 0 = default Yt animation background [= no fix]; 
  154.   // 1 = disable default animation background [= keep special animation]; 
  155.   // 2 = disable all animation backgrounds [= no animation backbround]
  156.  
  157.   const CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED = true;
  158.  
  159.   const MAX_TOOLTIP_NO_WRAP_WIDTH = '72vw'; // '' for disable; accept values like '60px', '25vw'
  160.  
  161.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  162.   /*
  163.  
  164.     ### Time Approach
  165.  
  166.     // all below values can make the time interval > 250ms
  167.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  168.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  169.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  170.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  171.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  172.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  173.  
  174.     ### Pixel Check
  175.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  176.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  177.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  178.  
  179.     ### Example - totalDuration = 280000
  180.     totalDuration 280000
  181.     stepInterval 0.5
  182.     numOfSteps = Math.round(100 / stepInterval) = 200
  183.     time interval = 280000 / 200 = 1400ms <acceptable>
  184.  
  185.     ### Example - totalDuration = 18000
  186.     totalDuration 18000
  187.     stepInterval 5
  188.     numOfSteps = Math.round(100 / stepInterval) = 20
  189.     time interval = 18000 / 20 = 900ms <acceptable>
  190.  
  191.     ### Example - totalDuration = 5000
  192.     totalDuration 5000
  193.     stepInterval 5
  194.     numOfSteps = Math.round(100 / stepInterval) = 20
  195.     time interval = 5000 / 20 = 250ms <threshold value>
  196.  
  197.     ### Example - totalDuration = 3600
  198.     totalDuration 3600
  199.     stepInterval 5
  200.     numOfSteps = Math.round(100 / stepInterval) = 20
  201.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  202.  
  203.   */
  204.  
  205.   // =======================================================================================================
  206.  
  207.   // AUTOMAICALLY DETERMINED
  208.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  209.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  210.   const CHAT_MENU_SCROLL_UNLOCKING = CHAT_MENU_REFIT_ALONG_SCROLLING >= 1;
  211.   let runTickerClassName = 'run-ticker';
  212.  
  213.   const dummyImgURL = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
  214.   /*
  215.     WebP: data:image/webp;base64,UklGRjAB
  216.     PNG: data:image/png;base64,iVBORw0KGg==
  217.     JPEG: data:image/jpeg;base64,/9j/4AA=
  218.     GIF: data:image/gif;base64,R0lGODlhAQABAIA=
  219.     BMP: data:image/bmp;base64,Qk1oAAAA
  220.     SVG: data:image/svg+xml;base64,PHN2Zy8+Cg==
  221.  
  222.     WebP: data:image/webp;base64,AAAAAAA=
  223.     PNG:  data:image/png;base64,AAAAAAA=
  224.     JPEG: data:image/jpeg;base64,AAAAAAA=
  225.     GIF:  data:image/gif;base64,AAAAAAA=
  226.     BMP:  data:image/bmp;base64,AAAAAAA=
  227.  
  228.     data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
  229.  
  230.  
  231.   */
  232.  
  233.   // image sizing code
  234.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  235.  
  236.  
  237.   //   function KC(a, b, c, d) {
  238.   //     d = void 0 === d ? "width" : d;
  239.   //     if (!a || !a.length)
  240.   //         return null;
  241.   //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  242.   //         var e = window.devicePixelRatio;
  243.   //         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"));
  244.   //         HC = e
  245.   //     } else
  246.   //         HC || (HC = window.devicePixelRatio);
  247.   //     e = HC;
  248.   //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  249.   //     if (z("kevlar_tuner_min_thumbnail_quality"))
  250.   //         return a[0].url || null;
  251.   //     e = a.length;
  252.   //     if (z("kevlar_tuner_max_thumbnail_quality"))
  253.   //         return a[e - 1].url || null;
  254.   //     if (c)
  255.   //         for (var h = 0; h < e; h++)
  256.   //             if (0 <= a[h].url.indexOf(c))
  257.   //                 return a[h].url || null;
  258.   //     for (c = 0; c < e; c++)
  259.   //         if (a[c][d] >= b)
  260.   //             return a[c].url || null;
  261.   //     for (b = e - 1; 0 < b; b--)
  262.   //         if (a[b][d])
  263.   //             return a[b].url || null;
  264.   //     return a[0].url || null
  265.   // }
  266.  
  267.   const { IntersectionObserver } = __CONTEXT__;
  268.  
  269.   /** @type {globalThis.PromiseConstructor} */
  270.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  271.  
  272.   let jsonParseFix = null;
  273.  
  274.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.");
  275.   if (typeof WebAssembly !== 'object') return console.warn("Your browser is too old.\nPlease upgrade to the latest version."); // for passive and once
  276.  
  277.   // necessity of cssText3_smooth_transform_position to be checked.
  278.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  279.  
  280.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  281.         position: static !important;
  282.     }
  283.  
  284.   `: '';
  285.  
  286.   // fallback if dummy style fn fails
  287.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  288.  
  289.     /* optional */
  290.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  291.         height: auto !important;
  292.         min-height: unset !important;
  293.     }
  294.  
  295.     #items.style-scope.yt-live-chat-item-list-renderer {
  296.         transform: translateY(0px) !important;
  297.     }
  298.  
  299.     /* optional */
  300.  
  301.   `: '';
  302.  
  303.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  304.  
  305.     /* ------------------------------------------------------------------------------------------------------------- */
  306.  
  307.     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 {
  308.         contain: layout style;
  309.     }
  310.  
  311.     #items.style-scope.yt-live-chat-item-list-renderer {
  312.         contain: layout paint style;
  313.     }
  314.  
  315.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  316.         contain: style;
  317.     }
  318.  
  319.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  320.         contain: size style;
  321.     }
  322.  
  323.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  324.         contain: size layout paint style;
  325.     }
  326.  
  327.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  328.         contain: layout paint style;
  329.     }
  330.  
  331.     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 {
  332.         contain: layout style;
  333.     }
  334.  
  335.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  336.         contain: layout paint style;
  337.     }
  338.  
  339.     /* ------------------------------------------------------------------------------------------------------------- */
  340.  
  341.   ` : '';
  342.  
  343.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  344.  
  345.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  346.         top: 4px;
  347.         transition-property: top;
  348.         bottom: unset;
  349.     }
  350.  
  351.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  352.         top: -42px;
  353.     }
  354.  
  355.   `: '';
  356.  
  357.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  358.  
  359.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  360.         contain: layout style;
  361.     }
  362.  
  363.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  364.         overflow: visible;
  365.     }
  366.  
  367.   `: '';
  368.  
  369.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  370.  
  371.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  372.         --yt-live-chat-action-panel-top-border: none;
  373.     }
  374.  
  375.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  376.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  377.     }
  378.  
  379.     html #panel-pages.yt-live-chat-renderer {
  380.         border-top: 0;
  381.         border-bottom: 0;
  382.     }
  383.  
  384.   `: '';
  385.  
  386.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  387.  
  388.     img,
  389.     yt-img-shadow[height][width],
  390.     yt-img-shadow {
  391.         content-visibility: visible !important;
  392.     }
  393.  
  394.   `  : '';
  395.  
  396.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  397.  
  398.     /* remove YouTube constant will-change */
  399.     /* constant value will slow down the performance; default auto */
  400.  
  401.     /* www-player.css */
  402.     html .ytp-contextmenu,
  403.     html .ytp-settings-menu {
  404.         will-change: unset;
  405.     }
  406.  
  407.     /* frequently matched elements */
  408.     html .fill.yt-interaction,
  409.     html .stroke.yt-interaction,
  410.     html .yt-spec-touch-feedback-shape__fill,
  411.     html .yt-spec-touch-feedback-shape__stroke {
  412.         will-change: unset;
  413.     }
  414.  
  415.     /* live_chat_polymer.js */
  416.     /*
  417.     html .toggle-button.tp-yt-paper-toggle-button,
  418.     html #primaryProgress.tp-yt-paper-progress,
  419.     html #secondaryProgress.tp-yt-paper-progress,
  420.     html #onRadio.tp-yt-paper-radio-button,
  421.     html .fill.yt-interaction,
  422.     html .stroke.yt-interaction,
  423.     html .yt-spec-touch-feedback-shape__fill,
  424.     html .yt-spec-touch-feedback-shape__stroke {
  425.         will-change: unset;
  426.     }
  427.     */
  428.  
  429.     /* desktop_polymer_enable_wil_icons.js */
  430.     /* html .fill.yt-interaction,
  431.     html .stroke.yt-interaction, */
  432.     html tp-yt-app-header::before,
  433.     html tp-yt-iron-list,
  434.     html #items.tp-yt-iron-list > *,
  435.     html #onRadio.tp-yt-paper-radio-button,
  436.     html .toggle-button.tp-yt-paper-toggle-button,
  437.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  438.     html #items.ytd-post-multi-image-renderer,
  439.     html #items.ytd-horizontal-card-list-renderer,
  440.     html #items.yt-horizontal-list-renderer,
  441.     html #left-arrow.yt-horizontal-list-renderer,
  442.     html #right-arrow.yt-horizontal-list-renderer,
  443.     html #items.ytd-video-description-infocards-section-renderer,
  444.     html #items.ytd-video-description-music-section-renderer,
  445.     html #chips.ytd-feed-filter-chip-bar-renderer,
  446.     html #chips.yt-chip-cloud-renderer,
  447.     html #items.ytd-merch-shelf-renderer,
  448.     html #items.ytd-product-details-image-carousel-renderer,
  449.     html ytd-video-preview,
  450.     html #player-container.ytd-video-preview,
  451.     html #primaryProgress.tp-yt-paper-progress,
  452.     html #secondaryProgress.tp-yt-paper-progress,
  453.     html ytd-miniplayer[enabled] /* ,
  454.     html .yt-spec-touch-feedback-shape__fill,
  455.     html .yt-spec-touch-feedback-shape__stroke */ {
  456.         will-change: unset;
  457.     }
  458.  
  459.     /* other */
  460.     .ytp-videowall-still-info-content[class],
  461.     .ytp-suggestion-image[class] {
  462.         will-change: unset !important;
  463.     }
  464.  
  465.   ` : '';
  466.  
  467.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  468.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  469.  
  470.     elzm-fonts {
  471.         visibility: collapse;
  472.         position: fixed;
  473.         top: -10px;
  474.         left: -10px;
  475.         font-size: 10pt;
  476.         line-height: 100%;
  477.         width: 100px;
  478.         height: 100px;
  479.         transform: scale(0.1);
  480.         transform: scale(0.01);
  481.         transform: scale(0.001);
  482.         transform-origin: 0 0;
  483.         contain: strict;
  484.         display: block;
  485.  
  486.         pointer-events: none !important;
  487.         user-select: none !important;
  488.     }
  489.  
  490.     elzm-fonts[id]#elzm-fonts-yk75g {
  491.         user-select: none !important;
  492.         pointer-events: none !important;
  493.     }
  494.  
  495.     elzm-font {
  496.         visibility: collapse;
  497.         position: absolute;
  498.         line-height: 100%;
  499.         width: 100px;
  500.         height: 100px;
  501.         contain: strict;
  502.         display: block;
  503.  
  504.         user-select: none !important;
  505.         pointer-events: none !important;
  506.     }
  507.  
  508.     elzm-font::before {
  509.         visibility: collapse;
  510.         position: absolute;
  511.         line-height: 100%;
  512.         width: 100px;
  513.         height: 100px;
  514.         contain: strict;
  515.         display: block;
  516.  
  517.         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';
  518.  
  519.         user-select: none !important;
  520.         pointer-events: none !important;
  521.     }
  522.  
  523.   `: '';
  524.  
  525.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  526.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  527.         -webkit-backdrop-filter: none;
  528.         backdrop-filter: none;
  529.     }
  530.   `: '';
  531.  
  532.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  533.  
  534.     @keyframes blinker-miuzp {
  535.         0%, 60%, 100% {
  536.             opacity: 1;
  537.         }
  538.         30% {
  539.             opacity: 0.6;
  540.         }
  541.     }
  542.  
  543.     yt-icon-button#show-more.has-new-messages-miuzp {
  544.         animation: blinker-miuzp 1.74s linear infinite;
  545.     }
  546.  
  547.   `: '';
  548.  
  549.   const cssText11_entire_message_clickable = FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK ? `
  550.     
  551.     yt-live-chat-paid-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  552.       pointer-events: none !important;
  553.     }
  554.  
  555.     yt-live-chat-membership-item-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  556.       pointer-events: none !important;
  557.     }
  558.  
  559.     yt-live-chat-paid-sticker-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  560.       pointer-events: none !important;
  561.     }
  562.  
  563.     yt-live-chat-text-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  564.       pointer-events: none !important;
  565.     }
  566.  
  567.     yt-live-chat-auto-mod-message-renderer.yt-live-chat-item-list-renderer[whole-message-clickable] #menu.style-scope[class] {
  568.       pointer-events: none !important;
  569.     }
  570.  
  571.   `: '';
  572.  
  573.   const cssText12_nowrap_tooltip = MAX_TOOLTIP_NO_WRAP_WIDTH && typeof MAX_TOOLTIP_NO_WRAP_WIDTH === 'string' ? `
  574.   
  575.  
  576.     tp-yt-paper-tooltip[role="tooltip"] {
  577.       box-sizing: content-box !important; 
  578.       margin: 0px !important;
  579.       padding: 0px !important;
  580.       contain: none !important;
  581.     }
  582.  
  583.     tp-yt-paper-tooltip[role="tooltip"] #tooltip[style-target="tooltip"] {
  584.       box-sizing: content-box !important;
  585.       display: inline-block;
  586.       contain: none !important;
  587.     }
  588.  
  589.  
  590.     tp-yt-paper-tooltip[role="tooltip"] #tooltip[style-target="tooltip"]{
  591.       max-width: ${MAX_TOOLTIP_NO_WRAP_WIDTH};
  592.       width: max-content;
  593.       text-overflow: ellipsis;
  594.       overflow: hidden;
  595.       white-space: nowrap;
  596.     }
  597.  
  598.  
  599.   `: '';
  600.  
  601.  
  602.   const cssText13_no_text_select_when_menu_visible = `
  603.     [menu-visible] {
  604.       --sfc47-text-select: none; 
  605.     }
  606.     [menu-visible] #header[id][class],
  607.     [menu-visible] #content[id][class],
  608.     [menu-visible] #header[id][class] *,
  609.     [menu-visible] #content[id][class] * {
  610.       user-select: var(--sfc47-text-select) !important;
  611.     }
  612.     [menu-visible] #menu {
  613.       --sfc47-text-select: inherit;
  614.     }
  615.   `
  616.  
  617.  
  618.   const addCss = () => `
  619.  
  620.     @property --ticker-rtime {
  621.       syntax: "<percentage>";
  622.       inherits: false;
  623.       initial-value: 0%;
  624.     }
  625.  
  626.     /*
  627.     .run-ticker {
  628.       background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  629.     }
  630.  
  631.     .run-ticker-test {
  632.       background: #00000001;
  633.     }
  634.  
  635.     .run-ticker-forced,
  636.     yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  637.     yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  638.     {
  639.       background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  640.     }
  641.     */
  642.  
  643.     .run-ticker {
  644.       --ticker-bg: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,
  648.     yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  649.     yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  650.     {
  651.       background: var(--ticker-bg) !important;
  652.     }
  653.  
  654.     yt-live-chat-ticker-dummy777-item-renderer {
  655.       background: #00000001;
  656.     }
  657.  
  658.     yt-live-chat-ticker-dummy777-item-renderer[dummy777] {
  659.       position: fixed !important;
  660.       top: -1000px !important;
  661.       left: -1000px !important;
  662.       font-size: 1px !important;
  663.       color: transparent !important;
  664.       pointer-events: none !important;
  665.       z-index: -1 !important;
  666.       contain: strict !important;
  667.       box-sizing: border-box !important;
  668.       pointer-events: none !important;
  669.       user-select: none !important;
  670.       max-width: 1px !important;
  671.       max-height: 1px !important;
  672.       overflow: hidden !important;
  673.       visibility: collapse !important;
  674.       display: none !important;
  675.     }
  676.  
  677.     yt-live-chat-ticker-dummy777-item-renderer #container {
  678.       background: inherit;
  679.     }
  680.  
  681.  
  682.     ${cssText8_fonts_pre_render}
  683.  
  684.     ${cssText9_no_backdrop_filter_when_menu_shown}
  685.  
  686.     @supports (contain: layout paint style) {
  687.  
  688.       ${cssText5}
  689.  
  690.     }
  691.  
  692.     @supports (color: var(--general)) {
  693.  
  694.       html {
  695.           --yt-live-chat-item-list-renderer-padding: 0px 0px;
  696.       }
  697.  
  698.       ${cssText3_smooth_transform_position}
  699.  
  700.       ${cssText7c_will_change_unset}
  701.  
  702.       ${cssText7b_content_visibility_unset}
  703.  
  704.       yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  705.           overflow-y: scroll;
  706.           padding-right: 0;
  707.       }
  708.  
  709.       ${cssText4_smooth_transform_forced_props}
  710.  
  711.       yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  712.           pointer-events: none !important;
  713.       }
  714.  
  715.       #continuations, #continuations * {
  716.           contain: strict;
  717.           position: fixed;
  718.           top: 2px;
  719.           height: 1px;
  720.           width: 2px;
  721.           height: 1px;
  722.           visibility: collapse;
  723.       }
  724.  
  725.       ${cssText6b_show_more_button}
  726.  
  727.       ${cssText6d_input_panel_border}
  728.  
  729.       ${cssText6c_input_panel_overflow}
  730.  
  731.     }
  732.  
  733.  
  734.     @supports (overflow-anchor: auto) {
  735.  
  736.       .no-anchor * {
  737.           overflow-anchor: none;
  738.       }
  739.       .no-anchor > item-anchor {
  740.           overflow-anchor: auto;
  741.       }
  742.  
  743.       item-anchor {
  744.  
  745.           height:1px;
  746.           width: 100%;
  747.           transform: scaleY(0.00001);
  748.           transform-origin:0 0;
  749.           contain: strict;
  750.           opacity:0;
  751.           display:flex;
  752.           position:relative;
  753.           flex-shrink:0;
  754.           flex-grow:0;
  755.           margin-bottom:0;
  756.           overflow:hidden;
  757.           box-sizing:border-box;
  758.           visibility: visible;
  759.           content-visibility: visible;
  760.           contain-intrinsic-size: auto 1px;
  761.           pointer-events:none !important;
  762.  
  763.       }
  764.  
  765.       #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  766.           overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  767.       }
  768.  
  769.       html item-anchor {
  770.  
  771.           height: 1px;
  772.           width: 1px;
  773.           top: auto;
  774.           left: auto;
  775.           right: auto;
  776.           bottom: auto;
  777.           transform: translateY(-1px);
  778.           position: absolute;
  779.           z-index: -1;
  780.  
  781.       }
  782.  
  783.     }
  784.  
  785.     @supports (color: var(--pre-rendering)) {
  786.  
  787.       @keyframes dontRenderAnimation {
  788.           0% {
  789.               background-position-x: 3px;
  790.           }
  791.           100% {
  792.               background-position-x: 4px;
  793.           }
  794.       }
  795.  
  796.       .dont-render[class] {
  797.           /* visibility: collapse !important; */
  798.           /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  799.  
  800.           transform: scale(0.01) !important;
  801.           transform: scale(0.00001) !important;
  802.           transform: scale(0.0000001) !important;
  803.           transform-origin: 0 0 !important;
  804.           z-index: -1 !important;
  805.           contain: strict !important;
  806.           box-sizing: border-box !important;
  807.  
  808.           height: 1px !important;
  809.           height: 0.1px !important;
  810.           height: 0.01px !important;
  811.           height: 0.0001px !important;
  812.           height: 0.000001px !important;
  813.  
  814.           animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  815.  
  816.           pointer-events: none !important;
  817.           user-select: none !important;
  818.  
  819.       }
  820.  
  821.       #sk35z {
  822.         display: block !important;
  823.  
  824.         visibility: collapse !important;
  825.  
  826.         transform: scale(0.01) !important;
  827.         transform: scale(0.00001) !important;
  828.         transform: scale(0.0000001) !important;
  829.         transform-origin: 0 0 !important;
  830.         z-index: -1 !important;
  831.         contain: strict !important;
  832.         box-sizing: border-box !important;
  833.  
  834.         height: 1px !important;
  835.         height: 0.1px !important;
  836.         height: 0.01px !important;
  837.         height: 0.0001px !important;
  838.         height: 0.000001px !important;
  839.  
  840.         position: absolute !important;
  841.         top: -1000px !important;
  842.         left: -1000px !important;
  843.  
  844.       }
  845.  
  846.     }
  847.  
  848.     [rNgzQ] {
  849.       opacity: 0 !important;
  850.       pointer-events: none !important;
  851.     }
  852.  
  853.     
  854.     ${cssText10_show_more_blinker}
  855.  
  856.     ${cssText11_entire_message_clickable}
  857.  
  858.     ${cssText12_nowrap_tooltip}
  859.  
  860.     ${cssText13_no_text_select_when_menu_visible}
  861.  
  862.   `;
  863.  
  864.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  865.  
  866.   // Create a unique key for the script and check if it is already running
  867.   const hkey_script = 'mchbwnoasqph';
  868.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  869.   win[hkey_script] = true;
  870.  
  871.   if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  872.  
  873.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  874.     if (te4 < 3) {
  875.       setTimeout(() => { });
  876.       setTimeout(() => { });
  877.     }
  878.  
  879.   }
  880.  
  881.   class Mutex {
  882.  
  883.     constructor() {
  884.       this.p = Promise.resolve()
  885.     }
  886.  
  887.     /**
  888.      *  @param {(lockResolve: () => void)} f
  889.      */
  890.     lockWith(f) {
  891.       this.p = this.p.then(() => new Promise(f).catch(console.warn))
  892.     }
  893.  
  894.   }
  895.  
  896.   function dr(s) {
  897.     // reserved for future use
  898.     return s;
  899.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  900.   }
  901.  
  902.   const getProto = (element) => {
  903.     if (element) {
  904.       const cnt = element.inst || element;
  905.       return cnt.constructor.prototype || null;
  906.     }
  907.     return null;
  908.   }
  909.  
  910.   const assertor = (f) => f() || console.assert(false, f + "");
  911.  
  912.   const fnIntegrity = (f, d) => {
  913.     if (!f || typeof f !== 'function') {
  914.       console.warn('f is not a function', f);
  915.       return;
  916.     }
  917.     let p = f + "", s = 0, j = -1, w = 0;
  918.     for (let i = 0, l = p.length; i < l; i++) {
  919.       const t = p[i];
  920.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  921.         if (j < i - 1) w++;
  922.         j = i;
  923.       } else {
  924.         s++;
  925.       }
  926.     }
  927.     let itz = `${f.length}.${s}.${w}`;
  928.     if (!d) {
  929.       return itz;
  930.     } else {
  931.       return itz === d;
  932.     }
  933.   }
  934.  
  935.  
  936.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  937.  
  938.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  939.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  940.   if (!isContainSupport) {
  941.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  942.   } else {
  943.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  944.   }
  945.  
  946.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  947.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  948.   if (!isOverflowAnchorSupport) {
  949.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  950.   } else {
  951.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  952.   }
  953.  
  954.   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.
  955.  
  956.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  957.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  958.  
  959.   let hasTimerModified = null;
  960.   const DO_CHECK_TICKER_BACKGROUND_OVERRIDED = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND || ENABLE_RAF_HACK_TICKERS;
  961.  
  962.   const fxOperator = (proto, propertyName) => {
  963.     let propertyDescriptorGetter = null;
  964.     try {
  965.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  966.     } catch (e) { }
  967.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  968.       try {
  969.  
  970.         return propertyDescriptorGetter.call(dr(e));
  971.       } catch (e) { }
  972.       return e[propertyName];
  973.     } : (e) => e[propertyName];
  974.   };
  975.  
  976.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  977.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  978.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  979.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  980.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  981.  
  982.   const groupCollapsed = (text1, text2) => {
  983.  
  984.     console.groupCollapsed(`%c${text1}%c${text2}`,
  985.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  986.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  987.     );
  988.   }
  989.  
  990.  
  991.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  992.   const onRegistryReady = (callback) => {
  993.     if (typeof customElements === 'undefined') {
  994.       if (!('__CE_registry' in document)) {
  995.         // https://github.com/webcomponents/polyfills/
  996.         Object.defineProperty(document, '__CE_registry', {
  997.           get() {
  998.             // return undefined
  999.           },
  1000.           set(nv) {
  1001.             if (typeof nv == 'object') {
  1002.               delete this.__CE_registry;
  1003.               this.__CE_registry = nv;
  1004.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  1005.             }
  1006.             return true;
  1007.           },
  1008.           enumerable: false,
  1009.           configurable: true
  1010.         })
  1011.       }
  1012.       let eventHandler = (evt) => {
  1013.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  1014.         const f = callback;
  1015.         callback = null;
  1016.         eventHandler = null;
  1017.         f();
  1018.       };
  1019.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  1020.     } else {
  1021.       callback();
  1022.     }
  1023.   };
  1024.  
  1025.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  1026.  
  1027.   const renderReadyPn = typeof ResizeObserver !== 'undefined' ? (sizingTarget) => {
  1028.  
  1029.     return new Promise(resolve => {
  1030.  
  1031.       let ro = new ResizeObserver(entries => {
  1032.         if (entries && entries.length >= 1) {
  1033.           resolve();
  1034.           ro.disconnect();
  1035.           ro = null;
  1036.         }
  1037.       });
  1038.       ro.observe(sizingTarget);
  1039.  
  1040.  
  1041.  
  1042.     });
  1043.  
  1044.   } : (sizingTarget) => {
  1045.  
  1046.  
  1047.     return new Promise(resolve => {
  1048.  
  1049.       let io = new IntersectionObserver(entries => {
  1050.         if (entries && entries.length >= 1) {
  1051.           resolve();
  1052.           io.disconnect();
  1053.           io = null;
  1054.         }
  1055.       });
  1056.       io.observe(sizingTarget);
  1057.  
  1058.  
  1059.  
  1060.     });
  1061.  
  1062.   };
  1063.  
  1064.   /* globals WeakRef:false */
  1065.  
  1066.   /** @type {(o: Object | null) => WeakRef | null} */
  1067.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  1068.  
  1069.   /** @type {(wr: Object | null) => Object | null} */
  1070.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  1071.  
  1072.   const { addCssManaged } = (() => {
  1073.  
  1074.     const addFontPreRendering = () => {
  1075.  
  1076.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  1077.  
  1078.       let efsContainer = document.createElement('elzm-fonts');
  1079.       efsContainer.id = 'elzm-fonts-yk75g'
  1080.  
  1081.       const arr = [];
  1082.       let p = document.createElement('elzm-font');
  1083.       arr.push(p);
  1084.  
  1085.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  1086.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1087.  
  1088.           p = document.createElement('elzm-font');
  1089.           p.style.fontWeight = size;
  1090.           arr.push(p);
  1091.         }
  1092.       }
  1093.  
  1094.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  1095.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1096.  
  1097.           p = document.createElement('elzm-font');
  1098.           p.style.fontFamily = 'Roboto';
  1099.           p.style.fontWeight = size;
  1100.           arr.push(p);
  1101.         }
  1102.       }
  1103.  
  1104.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  1105.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1106.  
  1107.           p = document.createElement('elzm-font');
  1108.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  1109.           p.style.fontWeight = size;
  1110.           arr.push(p);
  1111.         }
  1112.       }
  1113.  
  1114.  
  1115.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  1116.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1117.  
  1118.           p = document.createElement('elzm-font');
  1119.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  1120.           p.style.fontWeight = size;
  1121.           arr.push(p);
  1122.         }
  1123.       }
  1124.  
  1125.  
  1126.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  1127.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1128.  
  1129.           p = document.createElement('elzm-font');
  1130.           p.style.fontFamily = 'sans-serif';
  1131.           p.style.fontWeight = size;
  1132.           arr.push(p);
  1133.         }
  1134.       }
  1135.  
  1136.       console.log('number of elzm-font elements', arr.length);
  1137.  
  1138.       HTMLElement.prototype.append.apply(efsContainer, arr);
  1139.  
  1140.       (document.body || document.documentElement).appendChild(efsContainer);
  1141.  
  1142.  
  1143.       console.log('elzm-font elements have been added to the page for rendering.');
  1144.  
  1145.       console.groupEnd();
  1146.  
  1147.     }
  1148.  
  1149.     let isCssAdded = false;
  1150.  
  1151.     function addCssElement() {
  1152.       let s = document.createElement('style');
  1153.       s.id = 'ewRvC';
  1154.       return s;
  1155.     }
  1156.  
  1157.     const addCssManaged = () => {
  1158.       if (!isCssAdded && document.documentElement && document.head) {
  1159.         isCssAdded = true;
  1160.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  1161.         if (ENABLE_FONT_PRE_RENDERING) {
  1162.           Promise.resolve().then(addFontPreRendering)
  1163.         }
  1164.       }
  1165.     }
  1166.  
  1167.     return { addCssManaged };
  1168.   })();
  1169.  
  1170.  
  1171.   const { setupStyle } = (() => {
  1172.  
  1173.     const sp7 = Symbol();
  1174.  
  1175.     const proxyHelperFn = (dummy) => ({
  1176.  
  1177.       get(target, prop) {
  1178.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  1179.       },
  1180.       set(target, prop, value) {
  1181.         if (!(prop in dummy)) {
  1182.           target[prop] = value;
  1183.         }
  1184.         return true;
  1185.       },
  1186.       has(target, prop) {
  1187.         return (prop in target);
  1188.       },
  1189.       deleteProperty(target, prop) {
  1190.         return true;
  1191.       },
  1192.       ownKeys(target) {
  1193.         return Object.keys(target);
  1194.       },
  1195.       defineProperty(target, key, descriptor) {
  1196.         return Object.defineProperty(target, key, descriptor);
  1197.       },
  1198.       getOwnPropertyDescriptor(target, key) {
  1199.         return Object.getOwnPropertyDescriptor(target, key);
  1200.       },
  1201.  
  1202.     });
  1203.  
  1204.     const setupStyle = (m1, m2) => {
  1205.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  1206.  
  1207.       const dummy1v = {
  1208.         transform: '',
  1209.         height: '',
  1210.         minHeight: '',
  1211.         paddingBottom: '',
  1212.         paddingTop: ''
  1213.       };
  1214.  
  1215.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  1216.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  1217.         dummy1v[k] = dummyStyleFn(k);
  1218.       }
  1219.  
  1220.       const dummy1p = proxyHelperFn(dummy1v);
  1221.       const sp1v = new Proxy(m1.style, dummy1p);
  1222.       const sp2v = new Proxy(m2.style, dummy1p);
  1223.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  1224.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  1225.       m1.removeAttribute("style");
  1226.       m2.removeAttribute("style");
  1227.  
  1228.     }
  1229.  
  1230.     return { setupStyle };
  1231.  
  1232.   })();
  1233.  
  1234.  
  1235.  
  1236.   function setThumbnails(config) {
  1237.  
  1238.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1239.  
  1240.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1241.  
  1242.  
  1243.       if (thumbnails && thumbnails.length > 0) {
  1244.         if (flag0 > 0 && thumbnails.length > 1) {
  1245.           let pSize = 0;
  1246.           let newThumbnails = [];
  1247.           for (const thumbnail of thumbnails) {
  1248.             if (!thumbnail || !thumbnail.url) continue;
  1249.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1250.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1251.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1252.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1253.               newThumbnails.push(thumbnail);
  1254.               if (imageLinks) imageLinks.add(thumbnail.url);
  1255.             }
  1256.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1257.               pSize = thumbnail.width;
  1258.             }
  1259.           }
  1260.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1261.             baseObject.thumbnails = newThumbnails;
  1262.           } else {
  1263.             newThumbnails.length = 0;
  1264.           }
  1265.           newThumbnails = null;
  1266.         } else {
  1267.           for (const thumbnail of thumbnails) {
  1268.             if (thumbnail && thumbnail.url) {
  1269.               if (imageLinks) imageLinks.add(thumbnail.url);
  1270.             }
  1271.           }
  1272.         }
  1273.       }
  1274.  
  1275.     }
  1276.   }
  1277.  
  1278.   function fixLiveChatItem(item, imageLinks) {
  1279.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1280.     if (liveChatTextMessageRenderer) {
  1281.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1282.       if (messageRuns && messageRuns.length > 0) {
  1283.         for (const run of messageRuns) {
  1284.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1285.           setThumbnails({
  1286.             baseObject: emojiImage,
  1287.             thumbnails: emojiImage.thumbnails,
  1288.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1289.             imageLinks
  1290.           });
  1291.         }
  1292.       }
  1293.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1294.       setThumbnails({
  1295.         baseObject: authorPhoto,
  1296.         thumbnails: authorPhoto.thumbnails,
  1297.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1298.         imageLinks
  1299.       });
  1300.     }
  1301.   }
  1302.  
  1303.  
  1304.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1305.  
  1306.     const flags = () => {
  1307.       try {
  1308.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1309.       } catch (e) { }
  1310.       return null;
  1311.     };
  1312.  
  1313.     const flagsForced = () => {
  1314.       try {
  1315.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1316.       } catch (e) { }
  1317.       return null;
  1318.     };
  1319.  
  1320.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1321.  
  1322.       if (!EXPERIMENT_FLAGS) return;
  1323.  
  1324.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1325.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1326.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1327.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1328.         }
  1329.       }
  1330.  
  1331.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1332.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1333.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1334.       }
  1335.  
  1336.     };
  1337.  
  1338.     const uf = (EXPERIMENT_FLAGS) => {
  1339.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1340.       if (EXPERIMENT_FLAGS) {
  1341.         flagsFn(EXPERIMENT_FLAGS);
  1342.         flagsFn(flagsForced());
  1343.       }
  1344.     }
  1345.  
  1346.     uf();
  1347.  
  1348.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1349.  
  1350.       uf();
  1351.       let cidFlags = 0;
  1352.       let kd = 0;
  1353.       new Promise(flagResolve => {
  1354.  
  1355.         const flagTimer = () => {
  1356.           const EXPERIMENT_FLAGS = flags();
  1357.           if (!EXPERIMENT_FLAGS) return;
  1358.           uf(EXPERIMENT_FLAGS);
  1359.           if (kd > 0) return;
  1360.           kd = 1;
  1361.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1362.           const moDeferred = new Promise(resolve => {
  1363.             let mo = new MutationObserver(() => {
  1364.               if (mo) {
  1365.                 mo.disconnect();
  1366.                 mo.takeRecords();
  1367.                 mo = null;
  1368.                 resolve();
  1369.               }
  1370.             });
  1371.             mo.observe(document, { subtree: true, childList: true });
  1372.           });
  1373.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1374.         };
  1375.  
  1376.         uf();
  1377.         cidFlags = setInterval(flagTimer, 1);
  1378.       }).then(() => {
  1379.         if (cidFlags > 0) clearInterval(cidFlags);
  1380.         cidFlags = 0;
  1381.         uf();
  1382.       });
  1383.  
  1384.     }
  1385.  
  1386.     return flagsFnOnInterval;
  1387.  
  1388.   })() : null;
  1389.  
  1390.   let kptPF = null;
  1391.   const emojiPrefetched = new Set();
  1392.   const authorPhotoPrefetched = new Set();
  1393.  
  1394.   function linker(link, rel, href, _as) {
  1395.     return new Promise(resolve => {
  1396.       if (!link) link = document.createElement('link');
  1397.       link.rel = rel;
  1398.       if (_as) link.setAttribute('as', _as);
  1399.       link.onload = function () {
  1400.         resolve({
  1401.           link: this,
  1402.           success: true
  1403.         })
  1404.         this.remove();
  1405.       };
  1406.       link.onerror = function () {
  1407.         resolve({
  1408.           link: this,
  1409.           success: false
  1410.         });
  1411.         this.remove();
  1412.       };
  1413.       link.href = href;
  1414.       document.head.appendChild(link);
  1415.       link = null;
  1416.     });
  1417.   }
  1418.  
  1419.  
  1420.  
  1421.   const cleanContext = async (win) => {
  1422.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1423.     try {
  1424.       let mx = 16; // MAX TRIAL
  1425.       const frameId = 'vanillajs-iframe-v1';
  1426.       /** @type {HTMLIFrameElement | null} */
  1427.       let frame = document.getElementById(frameId);
  1428.       let removeIframeFn = null;
  1429.       if (!frame) {
  1430.         frame = document.createElement('iframe');
  1431.         frame.id = 'vanillajs-iframe-v1';
  1432.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1433.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1434.         n.appendChild(frame);
  1435.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1436.         const root = document.documentElement;
  1437.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1438.         removeIframeFn = (setTimeout) => {
  1439.           const removeIframeOnDocumentReady = (e) => {
  1440.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1441.             win = null;
  1442.             setTimeout(() => {
  1443.               n.remove();
  1444.               n = null;
  1445.             }, 200);
  1446.           }
  1447.           if (document.readyState !== 'loading') {
  1448.             removeIframeOnDocumentReady();
  1449.           } else {
  1450.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1451.           }
  1452.         }
  1453.       }
  1454.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1455.       const fc = frame.contentWindow;
  1456.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1457.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, getComputedStyle } = fc;
  1458.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, getComputedStyle };
  1459.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1460.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1461.  
  1462.       /** @type {HTMLElement} */
  1463.       const HTMLElementProto = fc.HTMLElement.prototype;
  1464.       /** @type {EventTarget} */
  1465.       const EventTargetProto = fc.EventTarget.prototype;
  1466.       jsonParseFix = {
  1467.         _JSON: fc.JSON, _parse: fc.JSON.parse
  1468.       }
  1469.       return {
  1470.         ...res,
  1471.         animate: HTMLElementProto.animate,
  1472.         addEventListener: EventTargetProto.addEventListener,
  1473.         removeEventListener: EventTargetProto.removeEventListener
  1474.       };
  1475.     } catch (e) {
  1476.       console.warn(e);
  1477.       return null;
  1478.     }
  1479.   };
  1480.  
  1481.   cleanContext(win).then(__CONTEXT__ => {
  1482.     if (!__CONTEXT__) return null;
  1483.  
  1484.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate, getComputedStyle, addEventListener, removeEventListener } = __CONTEXT__;
  1485.  
  1486.  
  1487.     let rafPromiseForTickers = null;
  1488.     const getRafPromiseForTickers = () => (rafPromiseForTickers = (rafPromiseForTickers || new Promise(resolve => {
  1489.       requestAnimationFrame(() => {
  1490.         rafPromiseForTickers = null;
  1491.         resolve();
  1492.       });
  1493.     })));
  1494.  
  1495.     let playerState = null;
  1496.  
  1497.     let aeConstructor = null;
  1498.  
  1499.     // << __openedChanged82 >>
  1500.     let currentMenuPivotWR = null;
  1501.  
  1502.     // << if DO_PARTICIPANT_LIST_HACKS >>
  1503.     const beforeParticipantsMap = new WeakMap();
  1504.     // << end >>
  1505.  
  1506.  
  1507.  
  1508.     // << if onRegistryReadyForDOMOperations >>
  1509.  
  1510.     let dt0 = Date.now() - 2000;
  1511.     const dateNow = () => Date.now() - dt0;
  1512.     // let lastScroll = 0;
  1513.     // let lastLShow = 0;
  1514.     let lastWheel = 0;
  1515.     let lastMouseDown = 0;
  1516.     let lastMouseUp = 0;
  1517.     let currentMouseDown = false;
  1518.     let lastTouchDown = 0;
  1519.     let lastTouchUp = 0;
  1520.     let currentTouchDown = false;
  1521.     let lastUserInteraction = 0;
  1522.  
  1523.     let scrollChatFn = null;
  1524.  
  1525.     let skipDontRender = true; // true first; false by flushActiveItems_
  1526.     let allowDontRender = null;
  1527.  
  1528.     // ---- #items mutation ----
  1529.     let sk35zResolveFn = null;
  1530.     let firstList = true;
  1531.  
  1532.     // << end >>
  1533.  
  1534.     class RAFHub {
  1535.       constructor() {
  1536.         /** @type {number} */
  1537.         this.startAt = 8170;
  1538.         /** @type {number} */
  1539.         this.counter = 0;
  1540.         /** @type {number} */
  1541.         this.rid = 0;
  1542.         /** @type {Map<number, FrameRequestCallback>} */
  1543.         this.funcs = new Map();
  1544.         const funcs = this.funcs;
  1545.         /** @type {FrameRequestCallback} */
  1546.         this.bCallback = this.mCallback.bind(this);
  1547.         this.pClear = () => funcs.clear();
  1548.         this.keepRAF = false;
  1549.       }
  1550.       /** @param {DOMHighResTimeStamp} highResTime */
  1551.       mCallback(highResTime) {
  1552.         this.rid = 0;
  1553.         Promise.resolve().then(this.pClear);
  1554.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  1555.       }
  1556.       /** @param {FrameRequestCallback} f */
  1557.       request(f) {
  1558.         if (this.counter > 1e9) this.counter = 9;
  1559.         let cid = this.startAt + (++this.counter);
  1560.         this.funcs.set(cid, f);
  1561.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  1562.         return cid;
  1563.       }
  1564.       /** @param {number} cid */
  1565.       cancel(cid) {
  1566.         cid = +cid;
  1567.         if (cid > 0) {
  1568.           if (cid <= this.startAt) {
  1569.             return cancelAnimationFrame(cid);
  1570.           }
  1571.           if (this.rid > 0) {
  1572.             this.funcs.delete(cid);
  1573.             if (this.funcs.size === 0 && !this.keepRAF) {
  1574.               cancelAnimationFrame(this.rid);
  1575.               this.rid = 0;
  1576.             }
  1577.           }
  1578.         }
  1579.       }
  1580.     }
  1581.  
  1582.     function basePrefetching() {
  1583.  
  1584.       new Promise(resolve => {
  1585.  
  1586.         if (document.readyState !== 'loading') {
  1587.           resolve();
  1588.         } else {
  1589.           win.addEventListener("DOMContentLoaded", resolve, false);
  1590.         }
  1591.  
  1592.       }).then(() => {
  1593.         const hostL1 = [
  1594.           'https://www.youtube.com', 'https://googlevideo.com',
  1595.           'https://googleapis.com', 'https://accounts.youtube.com',
  1596.           'https://www.gstatic.com', 'https://ggpht.com',
  1597.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1598.         ];
  1599.  
  1600.         const hostL2 = [
  1601.           'https://youtube.com',
  1602.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1603.         ];
  1604.  
  1605.         let link = null;
  1606.  
  1607.         function kn() {
  1608.  
  1609.           link = document.createElement('link');
  1610.           if (link.relList && link.relList.supports) {
  1611.             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)
  1612.           } else {
  1613.             kptPF = 0;
  1614.           }
  1615.  
  1616.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1617.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1618.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1619.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1620.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1621.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1622.           console.groupEnd();
  1623.  
  1624.         }
  1625.  
  1626.         for (const h of hostL1) {
  1627.  
  1628.           if (kptPF === null) kn();
  1629.           if (ENABLE_BASE_PREFETCHING) {
  1630.             // if (kptPF & 1) {
  1631.             //   linker(link, 'dns-prefetch', h);
  1632.             //   link = null;
  1633.             // }
  1634.             if (kptPF & 2) {
  1635.               linker(link, 'preconnect', h);
  1636.               link = null;
  1637.             }
  1638.           }
  1639.         }
  1640.  
  1641.         for (const h of hostL2) {
  1642.           if (kptPF === null) kn();
  1643.           if (ENABLE_BASE_PREFETCHING) {
  1644.             if (kptPF & 1) {
  1645.               linker(link, 'dns-prefetch', h);
  1646.               link = null;
  1647.             }
  1648.           }
  1649.         }
  1650.  
  1651.       })
  1652.  
  1653.  
  1654.     }
  1655.  
  1656.     if (flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1657.  
  1658.     if (DO_LINK_PREFETCH) basePrefetching();
  1659.  
  1660.     const { notifyPath7081 } = (() => {
  1661.       // DO_PARTICIPANT_LIST_HACKS
  1662.  
  1663.       const mutexParticipants = new Mutex();
  1664.  
  1665.       let uvid = 0;
  1666.       let r95dm = 0;
  1667.       let c95dm = -1;
  1668.  
  1669.       const foundMap = (base, content) => {
  1670.         /*
  1671.           let lastSearch = 0;
  1672.           let founds = base.map(baseEntry => {
  1673.             let search = content.indexOf(baseEntry, lastSearch);
  1674.             if (search < 0) return false;
  1675.             lastSearch = search + 1;
  1676.             return true;
  1677.           });
  1678.           return founds;
  1679.         */
  1680.         const contentSet = new Set(content);
  1681.         return base.map(baseEntry => contentSet.has(baseEntry));
  1682.  
  1683.       }
  1684.  
  1685.  
  1686.  
  1687.       const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1688.  
  1689.         const handler1 = {
  1690.           get(target, prop, receiver) {
  1691.             if (prop === 'object') {
  1692.               return participants; // avoid memory leakage
  1693.             }
  1694.             if (prop === 'type') {
  1695.               return 'splice';
  1696.             }
  1697.             return target[prop];
  1698.           }
  1699.         };
  1700.         const releaser = () => {
  1701.           participants = null;
  1702.         }
  1703.  
  1704.         let foundsForAfter = foundMap(idsAfter, idsBefore);
  1705.         let foundsForBefore = foundMap(idsBefore, idsAfter);
  1706.  
  1707.         let indexSplices = [];
  1708.         let contentUpdates = [];
  1709.         for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1710.           if (beforeParticipants[i] === participants[j]) {
  1711.             i++; j++;
  1712.           } else if (idsBefore[i] === idsAfter[j]) {
  1713.             // content changed
  1714.             contentUpdates.push({ indexI: i, indexJ: j })
  1715.             i++; j++;
  1716.           } else {
  1717.             let addedCount = 0;
  1718.             for (let q = j; q < foundsForAfter.length; q++) {
  1719.               if (foundsForAfter[q] === false) addedCount++;
  1720.               else break;
  1721.             }
  1722.             let removedCount = 0;
  1723.             for (let q = i; q < foundsForBefore.length; q++) {
  1724.               if (foundsForBefore[q] === false) removedCount++;
  1725.               else break;
  1726.             }
  1727.             if (!addedCount && !removedCount) {
  1728.               throw 'ERROR(0xFF32): spliceIndicesFunc';
  1729.             }
  1730.             indexSplices.push(new Proxy({
  1731.               index: j,
  1732.               addedCount: addedCount,
  1733.               removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1734.             }, handler1));
  1735.             i += removedCount;
  1736.             j += addedCount;
  1737.           }
  1738.         }
  1739.         foundsForBefore = null;
  1740.         foundsForAfter = null;
  1741.         idsBefore = null;
  1742.         idsAfter = null;
  1743.         beforeParticipants = null;
  1744.         return { indexSplices, contentUpdates, releaser };
  1745.  
  1746.       }
  1747.  
  1748.       /*
  1749.  
  1750.       customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1751.  
  1752.       VM63631:1 Error
  1753.       at customElements.get.notifyPath (<anonymous>:1:122)
  1754.       at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1755.       at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1756.       at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1757.       at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1758.       at ju (live_chat_polymer.js:1674:217)
  1759.       at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1760.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1761.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1762.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1763.  
  1764.       */
  1765.  
  1766.       function convertToIds(participants) {
  1767.         return participants.map(participant => {
  1768.           if (!participant || typeof participant !== 'object') {
  1769.             console.warn('Error(0xFA41): convertToIds', participant);
  1770.             return participant; // just in case
  1771.           }
  1772.           let keys = Object.keys(participant);
  1773.           // liveChatTextMessageRenderer
  1774.           // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1775.           // liveChatPaidMessageRenderer
  1776.           /*
  1777.  
  1778.             'yt-live-chat-participant-renderer' utilizes the following:
  1779.             authorName.simpleText: string
  1780.             authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1781.             authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1782.             authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1783.             authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1784.  
  1785.           */
  1786.           if (keys.length !== 1) {
  1787.             console.warn('Error(0xFA42): convertToIds', participant);
  1788.             return participant; // just in case
  1789.           }
  1790.           let key = keys[0];
  1791.           let renderer = (participant[key] || 0);
  1792.           let authorName = (renderer.authorName || 0);
  1793.           let text = `${authorName.simpleText || authorName.text}`
  1794.           let res = participant; // fallback if it is not a vaild entry
  1795.           if (typeof text !== 'string') {
  1796.             console.warn('Error(0xFA53): convertToIds', participant);
  1797.           } else {
  1798.             text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1799.             if (text.length > 1) res = text;
  1800.           }
  1801.           return res;
  1802.           // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1803.           // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1804.         });
  1805.       }
  1806.  
  1807.       const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1808.         // just update when content is changed.
  1809.         if (p1.authorName !== p2.authorName) return true;
  1810.         if (p1.authorPhoto !== p2.authorPhoto) return true;
  1811.         if (p1.authorBadges !== p2.authorBadges) return true;
  1812.         return false;
  1813.       } : (p1, p2) => {
  1814.         // keep integrity all the time.
  1815.         return p1 !== p2; // always true
  1816.       }
  1817.  
  1818.       function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1819.  
  1820.         if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1821.           if (path !== "participantsManager.participants") {
  1822.             return this.__notifyPath5036__.apply(this, arguments);
  1823.           }
  1824.           if (c95dm === r95dm) return;
  1825.         } else {
  1826.           const stack = new Error().stack;
  1827.           if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1828.             return this.__notifyPath5036__.apply(this, arguments);
  1829.           }
  1830.         }
  1831.  
  1832.         if (uvid > 1e8) uvid = uvid % 100;
  1833.         let tid = ++uvid;
  1834.  
  1835.         const cnt = this; // "yt-live-chat-participant-list-renderer"
  1836.         mutexParticipants.lockWith(lockResolve => {
  1837.  
  1838.           const participants00 = cnt.participantsManager.participants;
  1839.  
  1840.           if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1841.             lockResolve();
  1842.             return;
  1843.           }
  1844.  
  1845.           let doUpdate = false;
  1846.  
  1847.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1848.  
  1849.             if (!participants00.r94dm) {
  1850.               participants00.r94dm = 1;
  1851.               if (++r95dm > 1e9) r95dm = 9;
  1852.               participants00.push = function () {
  1853.                 if (++r95dm > 1e9) r95dm = 9;
  1854.                 return Array.prototype.push.apply(this, arguments);
  1855.               }
  1856.               participants00.pop = function () {
  1857.                 if (++r95dm > 1e9) r95dm = 9;
  1858.                 return Array.prototype.pop.apply(this, arguments);
  1859.               }
  1860.               participants00.shift = function () {
  1861.                 if (++r95dm > 1e9) r95dm = 9;
  1862.                 return Array.prototype.shift.apply(this, arguments);
  1863.               }
  1864.               participants00.unshift = function () {
  1865.                 if (++r95dm > 1e9) r95dm = 9;
  1866.                 return Array.prototype.unshift.apply(this, arguments);
  1867.               }
  1868.               participants00.splice = function () {
  1869.                 if (++r95dm > 1e9) r95dm = 9;
  1870.                 return Array.prototype.splice.apply(this, arguments);
  1871.               }
  1872.               participants00.sort = function () {
  1873.                 if (++r95dm > 1e9) r95dm = 9;
  1874.                 return Array.prototype.sort.apply(this, arguments);
  1875.               }
  1876.               participants00.reverse = function () {
  1877.                 if (++r95dm > 1e9) r95dm = 9;
  1878.                 return Array.prototype.reverse.apply(this, arguments);
  1879.               }
  1880.             }
  1881.  
  1882.             if (c95dm !== r95dm) {
  1883.               c95dm = r95dm;
  1884.               doUpdate = true;
  1885.             }
  1886.  
  1887.           } else {
  1888.             doUpdate = true;
  1889.           }
  1890.  
  1891.           if (!doUpdate) {
  1892.             lockResolve();
  1893.             return;
  1894.           }
  1895.  
  1896.           const participants = participants00.slice(0);
  1897.           const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1898.           beforeParticipantsMap.set(cnt, participants);
  1899.  
  1900.           const resPromise = (async () => {
  1901.  
  1902.             if (beforeParticipants.length === 0) {
  1903.               // not error
  1904.               return 0;
  1905.             }
  1906.  
  1907.             let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1908.  
  1909.             // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1910.             if (beforeParticipants.length !== countOfElements) {
  1911.               // there is somewrong for the cache. - sometimes happen
  1912.               return 0;
  1913.             }
  1914.  
  1915.             const idsBefore = convertToIds(beforeParticipants);
  1916.             const idsAfter = convertToIds(participants);
  1917.  
  1918.             let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1919.  
  1920.             let res = 1; // default 1 for no update
  1921.  
  1922.             if (indexSplices.length >= 1) {
  1923.  
  1924.  
  1925.               // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1926.               // let p1 = indexSplices[0].removed;
  1927.               // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1928.  
  1929.               /* folllow
  1930.                   a.notifyPath(c + ".splices", d);
  1931.                   a.notifyPath(c + ".length", b.length);
  1932.               */
  1933.               // stampDomArraySplices_
  1934.  
  1935.  
  1936.               await new Promise(resolve => {
  1937.                 cnt.resolveForDOMRendering781 = resolve;
  1938.  
  1939.                 cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1940.                   indexSplices
  1941.                 });
  1942.                 indexSplices = null;
  1943.                 releaser();
  1944.                 releaser = null;
  1945.                 cnt.__notifyPath5036__("participantsManager.participants.length",
  1946.                   participants.length
  1947.                 );
  1948.  
  1949.               });
  1950.  
  1951.               await Promise.resolve(0); // play safe for the change of 'length'
  1952.               countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1953.  
  1954.               let wrongSize = participants.length !== countOfElements
  1955.               if (wrongSize) {
  1956.                 console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1957.                 return 0;
  1958.               }
  1959.  
  1960.               res = 2 | 4;
  1961.  
  1962.             } else {
  1963.  
  1964.               indexSplices = null;
  1965.               releaser();
  1966.               releaser = null;
  1967.  
  1968.               if (participants.length !== countOfElements) {
  1969.                 // other unhandled cases
  1970.                 return 0;
  1971.               }
  1972.  
  1973.             }
  1974.  
  1975.             // participants.length === countOfElements before contentUpdates
  1976.             if (contentUpdates.length >= 1) {
  1977.               for (const contentUpdate of contentUpdates) {
  1978.                 let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1979.                 if (isChanged) {
  1980.                   cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1981.                   res |= 4 | 8;
  1982.                 }
  1983.               }
  1984.             }
  1985.             contentUpdates = null;
  1986.  
  1987.             return res;
  1988.  
  1989.  
  1990.           })();
  1991.  
  1992.  
  1993.           resPromise.then(resValue => {
  1994.  
  1995.             const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1996.             isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1997.             if (resValue === 0) {
  1998.               new Promise(resolve => {
  1999.                 cnt.resolveForDOMRendering781 = resolve;
  2000.                 isLogRequired && console.log("Full Refresh begins");
  2001.                 cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  2002.               }).then(() => {
  2003.                 isLogRequired && console.log("Full Refresh ends");
  2004.                 console.groupEnd();
  2005.               }).then(lockResolve);
  2006.               return;
  2007.             }
  2008.  
  2009.             const delayLockResolve = (resValue & 4) === 4;
  2010.  
  2011.             if (delayLockResolve) {
  2012.               isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  2013.               isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  2014.               isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  2015.               isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  2016.               isLogRequired && console.groupEnd();
  2017.               // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  2018.               // mutex lock with requestAnimationFrame can also disable participants update in background
  2019.               requestAnimationFrame(lockResolve);
  2020.             } else {
  2021.               lockResolve();
  2022.             }
  2023.  
  2024.           });
  2025.  
  2026.         });
  2027.  
  2028.       }
  2029.  
  2030.       return { notifyPath7081 };
  2031.  
  2032.     })();
  2033.  
  2034.     const whenDefinedMultiple = async (tags) => {
  2035.  
  2036.       const sTags = [...new Set(tags)];
  2037.       const len = sTags.length;
  2038.  
  2039.       const pTags = new Array(len);
  2040.       for (let i = 0; i < len; i++) {
  2041.         pTags[i] = customElements.whenDefined(sTags[i]);
  2042.       }
  2043.  
  2044.       await Promise.all(pTags);
  2045.       pTags.length = 0;
  2046.  
  2047.       return sTags;
  2048.  
  2049.     }
  2050.  
  2051.     const onRegistryReadyForDataManipulation = () => {
  2052.  
  2053.       function dummy5035(a, b, c) { }
  2054.       function dummy411(a, b, c) { }
  2055.  
  2056.  
  2057.  
  2058.       customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  2059.  
  2060.         if (!DO_PARTICIPANT_LIST_HACKS) return;
  2061.  
  2062.         const tag = "yt-live-chat-participant-list-renderer";
  2063.         const cProto = getProto(document.createElement(tag));
  2064.         if (!cProto || typeof cProto.attached !== 'function') {
  2065.           // for _registered, proto.attached shall exist when the element is defined.
  2066.           // for controller extraction, attached shall exist when instance creates.
  2067.           console.warn(`proto.attached for ${tag} is unavailable.`);
  2068.           return;
  2069.         }
  2070.  
  2071.  
  2072.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  2073.  
  2074.         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'];
  2075.         const fgs = {};
  2076.         for (const key of fgsArr) fgs[key] = undefined;
  2077.  
  2078.         try {
  2079.           const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  2080.           for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  2081.         } catch (e) { }
  2082.         console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  2083.  
  2084.         const canDoReplacement = (() => {
  2085.           if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  2086.             console.warn('YouTube Live Chat Tamer is running.');
  2087.             return;
  2088.           }
  2089.  
  2090.           if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  2091.             console.warn('YouTube Live Chat Tamer is running.');
  2092.             return;
  2093.           }
  2094.  
  2095.           cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  2096.           cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  2097.  
  2098.           if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  2099.             console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  2100.             return;
  2101.           }
  2102.  
  2103.           if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  2104.             console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  2105.             return;
  2106.           }
  2107.  
  2108.           if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  2109.             console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  2110.             return;
  2111.           }
  2112.           return true;
  2113.         })();
  2114.  
  2115.         console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  2116.  
  2117.         assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  2118.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2119.           const fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  2120.           const s = fiRSCB.split('.');
  2121.           if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  2122.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - OK`);
  2123.           } else {
  2124.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - NG`);
  2125.           }
  2126.         } else {
  2127.           console.log("flushRenderStamperComponentBindings_ - not found");
  2128.         }
  2129.         // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  2130.  
  2131.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2132.           cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  2133.           cProto.flushRenderStamperComponentBindings_ = function () {
  2134.             // console.log('flushRenderStamperComponentBindings_')
  2135.             this.flushRenderStamperComponentBindings66_();
  2136.             if (this.resolveForDOMRendering781) {
  2137.               this.resolveForDOMRendering781();
  2138.               this.resolveForDOMRendering781 = null;
  2139.             }
  2140.           };
  2141.         }
  2142.  
  2143.         cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  2144.           const container = ((this || 0).$ || 0).participants;
  2145.           if (!container) return 0;
  2146.           return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  2147.         }
  2148.  
  2149.         const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  2150.  
  2151.         cProto.__attached412__ = cProto.attached;
  2152.         const fpPList = function (hostElement) {
  2153.           const cnt = hostElement.inst || hostElement;
  2154.           if (beforeParticipantsMap.has(cnt)) return;
  2155.           hostElement.classList.add('n9fJ3');
  2156.  
  2157.           assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  2158.           if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  2159.             console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  2160.             return;
  2161.           }
  2162.  
  2163.           groupCollapsed("Participant List attached", "");
  2164.           // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  2165.           //   console.log(123, 'appendChild');
  2166.           //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  2167.           // }
  2168.  
  2169.           // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  2170.           //   console.log(123, 'insertBefore');
  2171.           //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  2172.           // }
  2173.  
  2174.           cnt.__notifyPath5036__ = cnt.notifyPath
  2175.           const participants = ((cnt.participantsManager || 0).participants || 0);
  2176.           assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  2177.           console.log(`initial number of participants: ${participants.length}`);
  2178.           const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  2179.           beforeParticipantsMap.set(cnt, newParticipants);
  2180.           cnt.notifyPath = notifyPath7081;
  2181.           console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  2182.           console.groupEnd();
  2183.         }
  2184.         cProto.attached = function () {
  2185.           fpPList(this.hostElement || this);
  2186.           this.__attached412__.apply(this, arguments);
  2187.         };
  2188.  
  2189.  
  2190.         if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  2191.  
  2192.           /** @type {boolean | (()=>boolean)} */
  2193.           let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  2194.           if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  2195.  
  2196.             let lastMessageDate = 0;
  2197.             cProto.stampDomArray66_ = cProto.stampDomArray_;
  2198.  
  2199.             cProto.stampDomArray_ = function (...args) {
  2200.               if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  2201.                 if (typeof toUseMaintainStableList === 'function') {
  2202.                   toUseMaintainStableList = toUseMaintainStableList();
  2203.                 }
  2204.                 args[5] = toUseMaintainStableList;
  2205.                 let currentDate = Date.now();
  2206.                 if (currentDate - lastMessageDate > 440) {
  2207.                   lastMessageDate = currentDate;
  2208.                   console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  2209.                 }
  2210.               }
  2211.               return this.stampDomArray66_.apply(this, args);
  2212.             }
  2213.  
  2214.             cProto.stampDomArray_.nIegT = 1;
  2215.  
  2216.           }
  2217.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  2218.         } else {
  2219.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  2220.         }
  2221.  
  2222.         console.groupEnd();
  2223.  
  2224.         if (onPageElements.length >= 1) {
  2225.           for (const s of onPageElements) {
  2226.             if ((s.inst || s).isAttached === true) {
  2227.               fpPList(s);
  2228.             }
  2229.           }
  2230.         }
  2231.  
  2232.       }).catch(console.warn);
  2233.  
  2234.     };
  2235.  
  2236.     if (DO_PARTICIPANT_LIST_HACKS) {
  2237.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2238.     }
  2239.  
  2240.  
  2241.  
  2242.     const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2243.  
  2244.  
  2245.  
  2246.  
  2247.     const bnForDelayChatOccurrence = () => {
  2248.  
  2249.       document.addEventListener('animationstart', (evt) => {
  2250.  
  2251.         if (evt.animationName === 'dontRenderAnimation') {
  2252.           evt.target.classList.remove('dont-render');
  2253.           if (scrollChatFn) scrollChatFn();
  2254.         }
  2255.  
  2256.       }, true);
  2257.  
  2258.       const f = (elm) => {
  2259.         if (elm && elm.nodeType === 1) {
  2260.           if (!skipDontRender && allowDontRender === true) {
  2261.             // innerTextFixFn();
  2262.             elm.classList.add('dont-render');
  2263.           }
  2264.         }
  2265.       }
  2266.  
  2267.       Node.prototype.__appendChild931__ = function (a) {
  2268.         a = dr(a);
  2269.         if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2270.           if (a && a.nodeType === 1) f(a);
  2271.           else if (a instanceof DocumentFragment) {
  2272.             for (let n = a.firstChild; n; n = n.nextSibling) {
  2273.               f(n);
  2274.             }
  2275.           }
  2276.         }
  2277.       }
  2278.  
  2279.       Node.prototype.__appendChild932__ = function () {
  2280.         this.__appendChild931__.apply(this, arguments);
  2281.         return Node.prototype.appendChild.apply(this, arguments);
  2282.       }
  2283.  
  2284.  
  2285.     };
  2286.  
  2287.     const watchUserCSS = () => {
  2288.  
  2289.       // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2290.  
  2291.       const getElemFromWR = (nr) => {
  2292.         const n = kRef(nr);
  2293.         if (n && n.isConnected) return n;
  2294.         return null;
  2295.       }
  2296.  
  2297.       const clearContentVisibilitySizing = () => {
  2298.         Promise.resolve().then(() => {
  2299.  
  2300.           const e = document.querySelector('#show-more[disabled]');
  2301.           let btnShowMoreWR = e ? mWeakRef(e) : null;
  2302.  
  2303.           let lastVisibleItemWR = null;
  2304.           for (const elm of document.querySelectorAll('[wSr93]')) {
  2305.             if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2306.             elm.setAttribute('wSr93', '');
  2307.             // custom CSS property --wsr94 not working when attribute wSr93 removed
  2308.           }
  2309.           requestAnimationFrame(() => {
  2310.             const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2311.             if (btnShowMore) btnShowMore.click();
  2312.             else {
  2313.               // would not work if switch it frequently
  2314.               const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2315.               if (lastVisibleItem) {
  2316.  
  2317.                 Promise.resolve()
  2318.                   .then(() => lastVisibleItem.scrollIntoView())
  2319.                   .then(() => lastVisibleItem.scrollIntoView(false))
  2320.                   .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2321.                   .catch(e => { }) // break the chain when method not callable
  2322.  
  2323.               }
  2324.             }
  2325.           });
  2326.  
  2327.         });
  2328.  
  2329.       }
  2330.  
  2331.       const mutObserver = new MutationObserver((mutations) => {
  2332.         for (const mutation of mutations) {
  2333.           if ((mutation.addedNodes || 0).length >= 1) {
  2334.             for (const addedNode of mutation.addedNodes) {
  2335.               if (addedNode.nodeName === 'STYLE') {
  2336.                 clearContentVisibilitySizing();
  2337.                 return;
  2338.               }
  2339.             }
  2340.           }
  2341.           if ((mutation.removedNodes || 0).length >= 1) {
  2342.             for (const removedNode of mutation.removedNodes) {
  2343.               if (removedNode.nodeName === 'STYLE') {
  2344.                 clearContentVisibilitySizing();
  2345.                 return;
  2346.               }
  2347.             }
  2348.           }
  2349.         }
  2350.       });
  2351.  
  2352.       mutObserver.observe(document.documentElement, {
  2353.         childList: true,
  2354.         subtree: false
  2355.       });
  2356.       mutObserver.observe(document.head, {
  2357.         childList: true,
  2358.         subtree: false
  2359.       });
  2360.       mutObserver.observe(document.body, {
  2361.         childList: true,
  2362.         subtree: false
  2363.       });
  2364.  
  2365.     }
  2366.  
  2367.  
  2368.     class WillChangeController {
  2369.       constructor(itemScroller, willChangeValue) {
  2370.         this.element = itemScroller;
  2371.         this.counter = 0;
  2372.         this.active = false;
  2373.         this.willChangeValue = willChangeValue;
  2374.       }
  2375.  
  2376.       beforeOper() {
  2377.         if (!this.active) {
  2378.           this.active = true;
  2379.           this.element.style.willChange = this.willChangeValue;
  2380.         }
  2381.         this.counter++;
  2382.       }
  2383.  
  2384.       afterOper() {
  2385.         const c = this.counter;
  2386.         requestAnimationFrame(() => {
  2387.           if (c === this.counter) {
  2388.             this.active = false;
  2389.             this.element.style.willChange = '';
  2390.           }
  2391.         });
  2392.       }
  2393.  
  2394.       release() {
  2395.         const element = this.element;
  2396.         this.element = null;
  2397.         this.counter = 1e16;
  2398.         this.active = false;
  2399.         try {
  2400.           element.style.willChange = '';
  2401.         } catch (e) { }
  2402.       }
  2403.  
  2404.     }
  2405.  
  2406.  
  2407.     const skzData = (skz) => skz.data = {
  2408.       "message": {
  2409.         "runs": [
  2410.           {
  2411.             "text": "em2o"
  2412.           },
  2413.           {
  2414.             "emoji": {
  2415.               "emojiId": "cm35z",
  2416.               "shortcuts": [
  2417.                 ":_s:",
  2418.                 ":s:"
  2419.               ],
  2420.               "searchTerms": [
  2421.                 "_s",
  2422.                 "s"
  2423.               ],
  2424.               "image": {
  2425.                 "thumbnails": [
  2426.                   {
  2427.                     "url": dummyImgURL,
  2428.                     "width": 48,
  2429.                     "height": 48
  2430.                   }
  2431.                 ],
  2432.                 "accessibility": {
  2433.                   "accessibilityData": {
  2434.                     "label": "s"
  2435.                   }
  2436.                 }
  2437.               },
  2438.               "isCustomEmoji": true
  2439.             }
  2440.           },
  2441.           {
  2442.             "text": "ji"
  2443.           }
  2444.         ]
  2445.       },
  2446.       "authorName": {
  2447.         "simpleText": "N"
  2448.       },
  2449.       "authorPhoto": {
  2450.         "thumbnails": [
  2451.           {
  2452.             "url": dummyImgURL,
  2453.             "width": 64,
  2454.             "height": 64
  2455.           }
  2456.         ]
  2457.       },
  2458.       "contextMenuEndpoint": {
  2459.         "commandMetadata": {
  2460.           "webCommandMetadata": {
  2461.             "ignoreNavigation": true
  2462.           }
  2463.         },
  2464.         "liveChatItemContextMenuEndpoint": {
  2465.           "params": "123=="
  2466.         }
  2467.       },
  2468.       "id": "sk35z",
  2469.       "timestampUsec": "1232302352350000",
  2470.       "authorBadges": [
  2471.         {
  2472.           "liveChatAuthorBadgeRenderer": {
  2473.             "customThumbnail": {
  2474.               "thumbnails": [
  2475.                 {
  2476.                   "url": dummyImgURL,
  2477.                   "width": 16,
  2478.                   "height": 16
  2479.                 },
  2480.                 {
  2481.                   "url": dummyImgURL,
  2482.                   "width": 32,
  2483.                   "height": 32
  2484.                 }
  2485.               ]
  2486.             },
  2487.             "tooltip": "T",
  2488.             "accessibility": {
  2489.               "accessibilityData": {
  2490.                 "label": "E"
  2491.               }
  2492.             }
  2493.           }
  2494.         }
  2495.       ],
  2496.       "authorExternalChannelId": "A",
  2497.       "contextMenuAccessibility": {
  2498.         "accessibilityData": {
  2499.           "label": "E"
  2500.         }
  2501.       },
  2502.       "timestampText": {
  2503.         "simpleText": "0:43"
  2504.       }
  2505.     };
  2506.  
  2507.  
  2508.  
  2509.     const { lcRendererElm, visObserver } = (() => {
  2510.  
  2511.  
  2512.  
  2513.       let lcRendererWR = null;
  2514.  
  2515.       const lcRendererElm = () => {
  2516.         let lcRenderer = kRef(lcRendererWR);
  2517.         if (!lcRenderer || !lcRenderer.isConnected) {
  2518.           lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2519.           lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2520.         }
  2521.         return lcRenderer;
  2522.       };
  2523.  
  2524.  
  2525.       let hasFirstShowMore = false;
  2526.  
  2527.       const visObserverFn = (entry) => {
  2528.  
  2529.         const target = entry.target;
  2530.         if (!target) return;
  2531.         // if(target.classList.contains('dont-render')) return;
  2532.         let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2533.         // const h = entry.boundingClientRect.height;
  2534.         /*
  2535.         if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2536.             // e.g. under fullscreen. the element created but not rendered.
  2537.             target.setAttribute('wSr93', '');
  2538.             return;
  2539.         }
  2540.         */
  2541.         if (isVisible) {
  2542.           // target.style.setProperty('--wsr94', h + 'px');
  2543.           target.setAttribute('wSr93', 'visible');
  2544.           if (nNextElem(target) === null) {
  2545.  
  2546.             // firstVisibleItemDetected = true;
  2547.             /*
  2548.               if (dateNow() - lastScroll < 80) {
  2549.                   lastLShow = 0;
  2550.                   lastScroll = 0;
  2551.                   Promise.resolve().then(clickShowMore);
  2552.               } else {
  2553.                   lastLShow = dateNow();
  2554.               }
  2555.               */
  2556.             // lastLShow = dateNow();
  2557.           } else if (!hasFirstShowMore) { // should more than one item being visible
  2558.             // implement inside visObserver to ensure there is sufficient delay
  2559.             hasFirstShowMore = true;
  2560.             requestAnimationFrame(() => {
  2561.               // foreground page
  2562.               // page visibly ready -> load the latest comments at initial loading
  2563.               const lcRenderer = lcRendererElm();
  2564.               if (lcRenderer) {
  2565.                 (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2566.               }
  2567.             });
  2568.           }
  2569.         }
  2570.         else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2571.  
  2572.           // target.style.setProperty('--wsr94', h + 'px');
  2573.           target.setAttribute('wSr93', 'hidden');
  2574.         } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2575.  
  2576.       }
  2577.  
  2578.  
  2579.  
  2580.       const visObserver = new IntersectionObserver((entries) => {
  2581.  
  2582.         for (const entry of entries) {
  2583.  
  2584.           Promise.resolve(entry).then(visObserverFn);
  2585.  
  2586.         }
  2587.  
  2588.       }, {
  2589.         // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2590.         rootMargin: "0px",
  2591.         threshold: [0.05, 0.95],
  2592.       });
  2593.  
  2594.  
  2595.       return { lcRendererElm, visObserver }
  2596.  
  2597.  
  2598.     })();
  2599.  
  2600.     const { setupMutObserver } = (() => {
  2601.  
  2602.       const mutFn = (items) => {
  2603.         for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2604.           if (node.hasAttribute('wSr93')) break;
  2605.           node.setAttribute('wSr93', '');
  2606.           visObserver.observe(node);
  2607.         }
  2608.       }
  2609.  
  2610.       const mutObserver = new MutationObserver((mutations) => {
  2611.         const items = (mutations[0] || 0).target;
  2612.         if (!items) return;
  2613.         if (sk35zResolveFn) {
  2614.           sk35zResolveFn();
  2615.           sk35zResolveFn = null;
  2616.         }
  2617.         mutFn(items);
  2618.       });
  2619.  
  2620.       const setupMutObserver = (m2) => {
  2621.         scrollChatFn = null;
  2622.         mutObserver.disconnect();
  2623.         mutObserver.takeRecords();
  2624.         if (m2) {
  2625.           ENABLE_DELAYED_CHAT_OCCURRENCE && bnForDelayChatOccurrence();
  2626.           if (typeof m2.__appendChild932__ === 'function') {
  2627.             if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2628.             if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2629.           }
  2630.           mutObserver.observe(m2, {
  2631.             childList: true,
  2632.             subtree: false
  2633.           });
  2634.           mutFn(m2);
  2635.  
  2636.           const isFirstList = firstList;
  2637.           firstList = false;
  2638.  
  2639.           if (ENABLE_OVERFLOW_ANCHOR) {
  2640.  
  2641.             let items = m2;
  2642.             let addedAnchor = false;
  2643.             if (items) {
  2644.               if (items.nextElementSibling === null) {
  2645.                 items.classList.add('no-anchor');
  2646.                 addedAnchor = true;
  2647.                 items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2648.               }
  2649.             }
  2650.  
  2651.  
  2652.  
  2653.             if (addedAnchor) {
  2654.               nodeParent(m2).classList.add('no-anchor'); // required
  2655.             }
  2656.  
  2657.           }
  2658.  
  2659.           // let div = document.createElement('div');
  2660.           // div.id = 'qwcc';
  2661.           // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2662.           // bufferRegion =div;
  2663.  
  2664.           // buffObserver.takeRecords();
  2665.           // buffObserver.disconnect();
  2666.           // buffObserver.observe(div,  {
  2667.           //     childList: true,
  2668.           //     subtree: false
  2669.           // })
  2670.  
  2671.           if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2672.  
  2673.             promiseForCustomYtElementsReady.then(() => {
  2674.  
  2675.               customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2676.  
  2677.  
  2678.  
  2679.  
  2680.                 setTimeout(() => {
  2681.  
  2682.                   /** @type {HTMLTemplateElement} */
  2683.                   let skz = document.createElement('yt-live-chat-text-message-renderer');
  2684.  
  2685.                   let cz1 = null;
  2686.  
  2687.                   if (skz && 'data' in skz && 'attached' in skz) {
  2688.  
  2689.                     const deferredZy1 = new Promise(resolve => {
  2690.  
  2691.                       skz.attached = function () {
  2692.                         cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2693.                         resolve(skz.textContent);
  2694.                       }
  2695.                       skz.detached = function () {
  2696.  
  2697.                       }
  2698.  
  2699.                     });
  2700.                     skz.id = 'sk35z';
  2701.                     skzData(skz);
  2702.  
  2703.  
  2704.                     sk35zResolveFn = null;
  2705.                     const deferredMutation = new Promise(resolve => {
  2706.                       sk35zResolveFn = resolve;
  2707.                       HTMLElement.prototype.appendChild.call(m2, skz);
  2708.                     });
  2709.  
  2710.                     Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2711.                       const [zy1, _] = res;
  2712.                       function fn() {
  2713.                         const zy2 = skz.textContent;
  2714.                         const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2715.                         if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2716.                           allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2717.                         }
  2718.                         if (allowDontRender === false) {
  2719.  
  2720.                           console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2721.                             "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2722.                             "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2723.                           );
  2724.  
  2725.                           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');
  2726.  
  2727.                           console.groupEnd();
  2728.                         } else if (allowDontRender === true) {
  2729.                           return true;
  2730.                         }
  2731.                       }
  2732.                       await new Promise(r => setTimeout(r, 1));
  2733.                       if (fn()) {
  2734.                         await new Promise(r => requestAnimationFrame(r));
  2735.                         if (fn()) {
  2736.                           skz.remove();
  2737.                           skz.textContent = '';
  2738.                           console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2739.                         }
  2740.                       }
  2741.                     });
  2742.  
  2743.                   }
  2744.  
  2745.                 }, 1);
  2746.  
  2747.               }).catch(console.warn);
  2748.  
  2749.             })
  2750.  
  2751.           }
  2752.  
  2753.  
  2754.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2755.  
  2756.             (() => {
  2757.  
  2758.               const tag = 'yt-iframed-player-events-relay'
  2759.               const dummy = document.createElement(tag);
  2760.  
  2761.               const cProto = getProto(dummy);
  2762.               if (!cProto || !cProto.handlePostMessage_) {
  2763.                 console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2764.                 return;
  2765.               }
  2766.  
  2767.               if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2768.  
  2769.                 cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2770.  
  2771.                 cProto.handlePostMessage_ = function (a) {
  2772.  
  2773.                   const da = (a || 0).data || 0;
  2774.                   if (typeof da === 'object') {
  2775.  
  2776.                     // console.log('handlePostMessage_', da)
  2777.                     const qc = da['yt-player-state-change'];
  2778.                     if (qc === 2) { playerState = 2 }
  2779.                     else if (qc === 3) { playerState = 3 }
  2780.                     else if (qc === 1) { playerState = 1 }
  2781.                     return this.handlePostMessage66_(a);
  2782.  
  2783.                   }
  2784.  
  2785.  
  2786.                 }
  2787.  
  2788.               }
  2789.  
  2790.  
  2791.             })();
  2792.  
  2793.           }
  2794.  
  2795.           if (isFirstList && DO_CHECK_TICKER_BACKGROUND_OVERRIDED) {
  2796.             setTimeout(() => {
  2797.               if (!hasTimerModified) return;
  2798.               const tickerRenderer = document.querySelector('#ticker yt-live-chat-ticker-renderer.style-scope.yt-live-chat-renderer');
  2799.               if (!tickerRenderer) return;
  2800.  
  2801.               const items = (tickerRenderer.$ || 0).items || 0;
  2802.               if (!items) return;
  2803.               const template = document.createElement('template');
  2804.               template.innerHTML = `<yt-live-chat-ticker-dummy777-item-renderer class="style-scope yt-live-chat-ticker-renderer" whole-message-clickable=""
  2805.                 modern="" aria-label="¥1,000" role="button" tabindex="0" id="Chw777" style="width: 94px; overflow: hidden;"
  2806.                 dimmed="" [dummy777]>
  2807.                 <div id="container" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer"
  2808.                   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));">
  2809.                   <div id="content" class="style-scope yt-live-chat-ticker-dummy777-item-renderer" style="color: rgb(255, 255, 255);">
  2810.                     <yt-img-shadow777 id="author-photo" height="24" width="24"
  2811.                       class="style-scope yt-live-chat-ticker-dummy777-item-renderer no-transition"
  2812.                       style="background-color: transparent;" loaded=""><img id="img"
  2813.                         draggable="false" class="style-scope yt-img-shadow" alt="I" height="24" width="24"
  2814.                         src="${dummyImgURL}"></yt-img-shadow777>
  2815.  
  2816.                     <span id="text" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer">¥1,000</span>
  2817.                   </div>
  2818.                 </div>
  2819.               </yt-live-chat-ticker-dummy777-item-renderer>`;
  2820.               const dummy777 = template.content.firstElementChild;
  2821.               items.appendChild(dummy777);
  2822.               Promise.resolve(dummy777).then((dummy777) => {
  2823.                 let container = HTMLElement.prototype.querySelector.call(dummy777, '#container') || 0;
  2824.                 if (container.isConnected === true) {
  2825.  
  2826.                   const evaluated = `${getComputedStyle(container).background}`;
  2827.  
  2828.                   container = null;
  2829.                   dummy777.remove();
  2830.                   dummy777.textContent = '';
  2831.                   dummy777 = null;
  2832.  
  2833.                   if (evaluated.indexOf('0.') < 4) {
  2834.  
  2835.                     // not fulfilling
  2836.                     // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  2837.  
  2838.                     console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2839.                       "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2840.                       "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2841.                     );
  2842.                     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');
  2843.                     console.groupEnd();
  2844.  
  2845.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND (Overriding other scripting)', 'background-color: #7eb32b; color: #102624; padding: 2px 4px');
  2846.  
  2847.                   } else {
  2848.  
  2849.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2850.                   }
  2851.                 }
  2852.               });
  2853.  
  2854.             }, 800);
  2855.           }
  2856.  
  2857.         }
  2858.       }
  2859.  
  2860.       return { setupMutObserver };
  2861.  
  2862.  
  2863.  
  2864.     })();
  2865.  
  2866.     const setupEvents = () => {
  2867.  
  2868.  
  2869.       let scrollCount = 0;
  2870.  
  2871.       const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2872.  
  2873.  
  2874.       const delayFlushActiveItemsAfterUserActionK_ = () => {
  2875.  
  2876.         const lcRenderer = lcRendererElm();
  2877.         if (lcRenderer) {
  2878.           const cnt = (lcRenderer.inst || lcRenderer);
  2879.           if (!cnt.hasUserJustInteracted11_) return;
  2880.           if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2881.             cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2882.           }
  2883.         }
  2884.  
  2885.       }
  2886.  
  2887.       document.addEventListener('scroll', (evt) => {
  2888.         if (!evt || !evt.isTrusted) return;
  2889.         // lastScroll = dateNow();
  2890.         if (++scrollCount > 1e9) scrollCount = 9;
  2891.       }, passiveCapture); // support contain => support passive
  2892.  
  2893.       let lastScrollCount = -1;
  2894.       document.addEventListener('wheel', (evt) => {
  2895.         if (!evt || !evt.isTrusted) return;
  2896.         if (lastScrollCount === scrollCount) return;
  2897.         lastScrollCount = scrollCount;
  2898.         lastWheel = dateNow();
  2899.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2900.       }, passiveCapture); // support contain => support passive
  2901.  
  2902.       document.addEventListener('mousedown', (evt) => {
  2903.         if (!evt || !evt.isTrusted) return;
  2904.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2905.         lastMouseDown = dateNow();
  2906.         currentMouseDown = true;
  2907.         lastUserInteraction = lastMouseDown;
  2908.       }, passiveCapture);
  2909.  
  2910.       document.addEventListener('pointerdown', (evt) => {
  2911.         if (!evt || !evt.isTrusted) return;
  2912.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2913.         lastMouseDown = dateNow();
  2914.         currentMouseDown = true;
  2915.         lastUserInteraction = lastMouseDown;
  2916.       }, passiveCapture);
  2917.  
  2918.       document.addEventListener('click', (evt) => {
  2919.         if (!evt || !evt.isTrusted) return;
  2920.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2921.         lastMouseDown = lastMouseUp = dateNow();
  2922.         currentMouseDown = false;
  2923.         lastUserInteraction = lastMouseDown;
  2924.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2925.       }, passiveCapture);
  2926.  
  2927.       document.addEventListener('tap', (evt) => {
  2928.         if (!evt || !evt.isTrusted) return;
  2929.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2930.         lastMouseDown = lastMouseUp = dateNow();
  2931.         currentMouseDown = false;
  2932.         lastUserInteraction = lastMouseDown;
  2933.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2934.       }, passiveCapture);
  2935.  
  2936.  
  2937.       document.addEventListener('mouseup', (evt) => {
  2938.         if (!evt || !evt.isTrusted) return;
  2939.         if (currentMouseDown) {
  2940.           lastMouseUp = dateNow();
  2941.           currentMouseDown = false;
  2942.           lastUserInteraction = lastMouseUp;
  2943.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2944.         }
  2945.       }, passiveCapture);
  2946.  
  2947.  
  2948.       document.addEventListener('pointerup', (evt) => {
  2949.         if (!evt || !evt.isTrusted) return;
  2950.         if (currentMouseDown) {
  2951.           lastMouseUp = dateNow();
  2952.           currentMouseDown = false;
  2953.           lastUserInteraction = lastMouseUp;
  2954.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2955.         }
  2956.       }, passiveCapture);
  2957.  
  2958.       document.addEventListener('touchstart', (evt) => {
  2959.         if (!evt || !evt.isTrusted) return;
  2960.         lastTouchDown = dateNow();
  2961.         currentTouchDown = true;
  2962.         lastUserInteraction = lastTouchDown;
  2963.       }, passiveCapture);
  2964.  
  2965.       document.addEventListener('touchmove', (evt) => {
  2966.         if (!evt || !evt.isTrusted) return;
  2967.         lastTouchDown = dateNow();
  2968.         currentTouchDown = true;
  2969.         lastUserInteraction = lastTouchDown;
  2970.       }, passiveCapture);
  2971.  
  2972.       document.addEventListener('touchend', (evt) => {
  2973.         if (!evt || !evt.isTrusted) return;
  2974.         if (currentTouchDown) {
  2975.           lastTouchUp = dateNow();
  2976.           currentTouchDown = false;
  2977.           lastUserInteraction = lastTouchUp;
  2978.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2979.         }
  2980.       }, passiveCapture);
  2981.  
  2982.       document.addEventListener('touchcancel', (evt) => {
  2983.         if (!evt || !evt.isTrusted) return;
  2984.         if (currentTouchDown) {
  2985.           lastTouchUp = dateNow();
  2986.           currentTouchDown = false;
  2987.           lastUserInteraction = lastTouchUp;
  2988.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2989.         }
  2990.       }, passiveCapture);
  2991.  
  2992.  
  2993.     }
  2994.  
  2995.  
  2996.     const onRegistryReadyForDOMOperations = () => {
  2997.  
  2998.       let firstCheckedOnYtInit = false;
  2999.  
  3000.       const assertorURL = () => assertor(() => location.pathname.startsWith('/live_chat') && (location.search.indexOf('continuation=') > 0 || location.search.indexOf('v=') > 0));
  3001.  
  3002.       const mightFirstCheckOnYtInit = () => {
  3003.         if (firstCheckedOnYtInit) return;
  3004.         firstCheckedOnYtInit = true;
  3005.  
  3006.         if (!document.body || !document.head) return;
  3007.         if (!assertorURL()) return;
  3008.  
  3009.         addCssManaged();
  3010.  
  3011.         let efsContainer = document.getElementById('elzm-fonts-yk75g');
  3012.         if (efsContainer && efsContainer.parentNode !== document.body) {
  3013.           document.body.appendChild(efsContainer);
  3014.         }
  3015.  
  3016.       };
  3017.  
  3018.       if (!assertorURL()) return;
  3019.       // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  3020.  
  3021.       if (document.documentElement && document.head) {
  3022.         addCssManaged();
  3023.       }
  3024.       // console.log(document.body===null)
  3025.  
  3026.       customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  3027.  
  3028.         const tag = "yt-live-chat-item-list-renderer"
  3029.         const dummy = document.createElement(tag);
  3030.  
  3031.         const cProto = getProto(dummy);
  3032.         if (!cProto || !cProto.attached) {
  3033.           console.warn(`proto.attached for ${tag} is unavailable.`);
  3034.           return;
  3035.         }
  3036.  
  3037.         mightFirstCheckOnYtInit();
  3038.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  3039.         console.log("[Begin]");
  3040.  
  3041.         const mclp = cProto;
  3042.         try {
  3043.           assertor(() => typeof mclp.scrollToBottom_ === 'function');
  3044.           assertor(() => typeof mclp.flushActiveItems_ === 'function');
  3045.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  3046.           assertor(() => typeof mclp.setAtBottom === 'function');
  3047.           assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  3048.           assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  3049.         } catch (e) { }
  3050.  
  3051.  
  3052.         try {
  3053.           assertor(() => typeof mclp.attached === 'function');
  3054.           assertor(() => typeof mclp.detached === 'function');
  3055.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  3056.           assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  3057.           assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  3058.           assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  3059.           assertor(() => typeof mclp.smoothScroll_ === 'function');
  3060.           assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  3061.         } catch (e) { }
  3062.  
  3063.         mclp.__intermediate_delay__ = null;
  3064.  
  3065.         let mzk = 0;
  3066.         let myk = 0;
  3067.         let mlf = 0;
  3068.         let myw = 0;
  3069.         let mzt = 0;
  3070.         let zarr = null;
  3071.         let mlg = 0;
  3072.  
  3073.         if ((mclp.clearList || 0).length === 0) {
  3074.           assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  3075.           mclp.clearList66 = mclp.clearList;
  3076.           mclp.clearList = function () {
  3077.             mzk++;
  3078.             myk++;
  3079.             mlf++;
  3080.             myw++;
  3081.             mzt++;
  3082.             mlg++;
  3083.             zarr = null;
  3084.             this.__intermediate_delay__ = null;
  3085.             this.clearList66();
  3086.           };
  3087.           console.log("clearList", "OK");
  3088.         } else {
  3089.           console.log("clearList", "NG");
  3090.         }
  3091.  
  3092.  
  3093.         let onListRendererAttachedDone = false;
  3094.  
  3095.         function setList(itemOffset, items) {
  3096.  
  3097.           const isFirstTime = onListRendererAttachedDone === false;
  3098.  
  3099.           if (isFirstTime) {
  3100.             onListRendererAttachedDone = true;
  3101.             Promise.resolve().then(watchUserCSS);
  3102.             addCssManaged();
  3103.             setupEvents();
  3104.           }
  3105.  
  3106.           setupStyle(itemOffset, items);
  3107.  
  3108.           setupMutObserver(items);
  3109.         }
  3110.  
  3111.         mclp.attached419 = async function () {
  3112.  
  3113.           if (!this.isAttached) return;
  3114.  
  3115.           let maxTrial = 16;
  3116.           while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  3117.             if (--maxTrial < 0 || !this.isAttached) return;
  3118.             await new Promise(requestAnimationFrame);
  3119.           }
  3120.  
  3121.           if (this.isAttached !== true) return;
  3122.  
  3123.           if (!this.$) {
  3124.             console.warn("!this.$");
  3125.             return;
  3126.           }
  3127.           if (!this.$) return;
  3128.           /** @type {HTMLElement | null} */
  3129.           const itemScroller = this.$['item-scroller'];
  3130.           /** @type {HTMLElement | null} */
  3131.           const itemOffset = this.$['item-offset'];
  3132.           /** @type {HTMLElement | null} */
  3133.           const items = this.$['items'];
  3134.  
  3135.           if (!itemScroller || !itemOffset || !items) {
  3136.             console.warn("items.parentNode !== itemOffset");
  3137.             return;
  3138.           }
  3139.  
  3140.           if (nodeParent(items) !== itemOffset) {
  3141.  
  3142.             console.warn("items.parentNode !== itemOffset");
  3143.             return;
  3144.           }
  3145.  
  3146.  
  3147.           if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  3148.  
  3149.             console.warn("id incorrect");
  3150.             return;
  3151.           }
  3152.  
  3153.           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')
  3154.  
  3155.           if (!isTargetItems) {
  3156.             console.warn("!isTargetItems");
  3157.             return;
  3158.           }
  3159.  
  3160.           setList(itemOffset, items);
  3161.  
  3162.         }
  3163.  
  3164.         mclp.attached331 = mclp.attached;
  3165.         mclp.attached = function () {
  3166.           this.attached419 && this.attached419();
  3167.           return this.attached331();
  3168.         }
  3169.  
  3170.         mclp.detached331 = mclp.detached;
  3171.  
  3172.         mclp.detached = function () {
  3173.           setupMutObserver();
  3174.           return this.detached331();
  3175.         }
  3176.  
  3177.         const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  3178.         for (const t29 of t29s) {
  3179.           if ((t29.inst || t29).isAttached === true) {
  3180.             t29.attached419();
  3181.           }
  3182.         }
  3183.  
  3184.         if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  3185.  
  3186.           assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  3187.           assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  3188.  
  3189.           /** @type {Map<number, any>} */
  3190.           const aMap = new Map();
  3191.           let count = 6150;
  3192.           mclp.async66 = mclp.async;
  3193.           mclp.async = function (e, f) {
  3194.             // ensure the previous operation is done
  3195.             // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  3196.             const hasF = arguments.length === 2;
  3197.             const stack = new Error().stack;
  3198.             const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  3199.             if (count > 1e9) count = 6159;
  3200.             const resId = ++count;
  3201.             aMap.set(resId, e);
  3202.             (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  3203.               const rp = aMap.get(resId);
  3204.               if (typeof rp !== 'function') {
  3205.                 return;
  3206.               }
  3207.               let cancelCall = false;
  3208.               if (isFlushAsync) {
  3209.                 if (rk < 0) {
  3210.                   cancelCall = true;
  3211.                 } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  3212.                   cancelCall = true;
  3213.                 }
  3214.               }
  3215.               if (cancelCall) {
  3216.                 aMap.delete(resId);
  3217.               } else {
  3218.                 const asyncEn = function () {
  3219.                   aMap.delete(resId);
  3220.                   return rp.apply(this, arguments);
  3221.                 };
  3222.                 aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3223.               }
  3224.             });
  3225.  
  3226.             return resId;
  3227.           }
  3228.  
  3229.           mclp.cancelAsync66 = mclp.cancelAsync;
  3230.           mclp.cancelAsync = function (resId) {
  3231.             if (resId <= 6150) {
  3232.               this.cancelAsync66(resId);
  3233.             } else if (aMap.has(resId)) {
  3234.               const rp = aMap.get(resId);
  3235.               aMap.delete(resId);
  3236.               if (typeof rp !== 'function') {
  3237.                 this.cancelAsync66(rp);
  3238.               }
  3239.             }
  3240.           }
  3241.  
  3242.           console.log("async", "OK");
  3243.         } else {
  3244.           console.log("async", "NG");
  3245.         }
  3246.  
  3247.  
  3248.         if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3249.  
  3250.           assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3251.           mclp.showNewItems66_ = mclp.showNewItems_;
  3252.  
  3253.           mclp.showNewItems77_ = async function () {
  3254.             if (myk > 1e9) myk = 9;
  3255.             let tid = ++myk;
  3256.  
  3257.             await new Promise(requestAnimationFrame);
  3258.  
  3259.             if (tid !== myk) {
  3260.               return;
  3261.             }
  3262.  
  3263.             const cnt = this;
  3264.  
  3265.             await Promise.resolve();
  3266.             cnt.showNewItems66_();
  3267.  
  3268.             await Promise.resolve();
  3269.  
  3270.           }
  3271.  
  3272.           mclp.showNewItems_ = function () {
  3273.  
  3274.             const cnt = this;
  3275.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3276.               cnt.showNewItems77_().then(() => {
  3277.                 resolve();
  3278.               });
  3279.             });
  3280.           }
  3281.  
  3282.           console.log("showNewItems_", "OK");
  3283.         } else {
  3284.           console.log("showNewItems_", "NG");
  3285.         }
  3286.  
  3287.  
  3288.         if ((mclp.flushActiveItems_ || 0).length === 0) {
  3289.  
  3290.           assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3291.  
  3292.           let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3293.  
  3294.           let contensWillChangeController = null;
  3295.  
  3296.           mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3297.  
  3298.           mclp.flushActiveItems78_ = async function (tid) {
  3299.             try {
  3300.               if (tid !== mlf) return;
  3301.               const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3302.               let logger = false;
  3303.               const cnt = this;
  3304.               let immd = cnt.__intermediate_delay__;
  3305.               await new Promise(requestAnimationFrame);
  3306.  
  3307.               if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3308.               if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3309.  
  3310.               mlf++;
  3311.               if (mlg > 1e9) mlg = 9;
  3312.               ++mlg;
  3313.  
  3314.               const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3315.               const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3316.               let changeMaxItemsToDisplay = false;
  3317.               const activeItemsLen = this.activeItems_.length;
  3318.               if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3319.                 logger = true;
  3320.  
  3321.                 groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3322.  
  3323.                 logger && console.log('[Begin]')
  3324.  
  3325.                 console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3326.                 if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3327.                   console.log('reduce maxitems');
  3328.                   if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3329.                     // as all the rendered chats are already "outdated"
  3330.                     // all old chats shall remove and reduced number of few chats will be rendered
  3331.                     // then restore to the original number
  3332.                     changeMaxItemsToDisplay = true;
  3333.                     this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3334.                     console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3335.                   }
  3336.                   this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3337.                   //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3338.  
  3339.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3340.                 } else {
  3341.                   this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3342.  
  3343.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3344.                 }
  3345.               }
  3346.               // it is found that it will render all stacked chats after switching back from background
  3347.               // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3348.               // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3349.  
  3350.  
  3351.               const items = (cnt.$ || 0).items;
  3352.  
  3353.               if (USE_WILL_CHANGE_CONTROLLER) {
  3354.                 if (contensWillChangeController && contensWillChangeController.element !== items) {
  3355.                   contensWillChangeController.release();
  3356.                   contensWillChangeController = null;
  3357.                 }
  3358.                 if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3359.               }
  3360.               const wcController = contensWillChangeController;
  3361.               cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3362.               wcController && wcController.beforeOper();
  3363.               await Promise.resolve();
  3364.               const acItems = cnt.activeItems_;
  3365.               const len1 = acItems.length;
  3366.               if (!len1) console.warn('cnt.activeItems_.length = 0');
  3367.               let waitFor = [];
  3368.  
  3369.  
  3370.               /** @type {Set<string>} */
  3371.               const imageLinks = new Set();
  3372.  
  3373.               if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3374.                 for (const item of acItems) {
  3375.                   fixLiveChatItem(item, imageLinks);
  3376.                 }
  3377.               }
  3378.               if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3379.                 if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3380.                 if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3381.  
  3382.                 // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3383.                 const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3384.                 // preload performs the high priority fetching.
  3385.                 // prefetch delays the chat display if the video resoruce is demanding.
  3386.  
  3387.                 if (rel) {
  3388.  
  3389.                   imageLinks.forEach(imageLink => {
  3390.                     let d = false;
  3391.                     const isEmoji = imageLink.includes('/emoji/');
  3392.                     const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3393.                     if (!pretechedSet.has(imageLink)) {
  3394.                       pretechedSet.add(imageLink);
  3395.                       d = true;
  3396.                     }
  3397.                     if (d) {
  3398.                       waitFor.push(linker(null, rel, imageLink, 'image'));
  3399.  
  3400.                     }
  3401.                   })
  3402.  
  3403.                 }
  3404.  
  3405.               }
  3406.  
  3407.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3408.               // console.log('ss1', Date.now())
  3409.               if (waitFor.length > 0) {
  3410.                 await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3411.               }
  3412.               waitFor.length = 0;
  3413.               waitFor = null;
  3414.               // console.log('ss2', Date.now())
  3415.               cnt.flushActiveItems66_();
  3416.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3417.               const len2 = cnt.activeItems_.length;
  3418.               const bAsync = len1 !== len2;
  3419.               await Promise.resolve();
  3420.               if (wcController) {
  3421.                 if (bAsync) {
  3422.                   cnt.async(() => {
  3423.                     wcController.afterOper();
  3424.                   });
  3425.                 } else {
  3426.                   wcController.afterOper();
  3427.                 }
  3428.               }
  3429.               if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3430.                 this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3431.  
  3432.                 logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3433.                 //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3434.               } else if (changeMaxItemsToDisplay) {
  3435.  
  3436.                 logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3437.                   maxItemsToDisplay: this.data.maxItemsToDisplay,
  3438.                   reducedMaxItemsToDisplay,
  3439.                   originalMaxItemsToDisplay: tmpMaxItemsCount
  3440.                 });
  3441.               }
  3442.               logger && console.log('[End]')
  3443.  
  3444.               logger && console.groupEnd();
  3445.  
  3446.               if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3447.  
  3448.  
  3449.                 const ff = () => {
  3450.  
  3451.                   if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3452.                   //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3453.                   if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3454.                     cnt.scrollToBottom_();
  3455.  
  3456.                     Promise.resolve().then(() => {
  3457.  
  3458.                       if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3459.                       if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3460.                     });
  3461.  
  3462.  
  3463.                   }
  3464.                 }
  3465.  
  3466.                 ff();
  3467.  
  3468.  
  3469.                 Promise.resolve().then(ff);
  3470.  
  3471.                 // requestAnimationFrame(ff);
  3472.               } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3473.  
  3474.                 const knt = cnt;
  3475.                 if (!scrollChatFn) {
  3476.                   const cnt = knt;
  3477.                   const f = () => {
  3478.                     const itemScroller = cnt.itemScroller;
  3479.                     if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3480.                     if (!cnt.atBottom) {
  3481.                       cnt.scrollToBottom_();
  3482.                     } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3483.                       itemScroller.scrollTop = itemScroller.scrollHeight;
  3484.                     }
  3485.                   };
  3486.                   scrollChatFn = () => Promise.resolve().then(f).then(f);
  3487.                 }
  3488.  
  3489.                 if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3490.               }
  3491.  
  3492.               return 1;
  3493.  
  3494.  
  3495.             } catch (e) {
  3496.               console.warn(e);
  3497.             }
  3498.           }
  3499.  
  3500.           mclp.flushActiveItems77_ = function () {
  3501.  
  3502.             return new Promise(resResolve => {
  3503.               try {
  3504.                 const cnt = this;
  3505.                 if (mlf > 1e9) mlf = 9;
  3506.                 let tid = ++mlf;
  3507.                 const hostElement = cnt.hostElement || cnt;
  3508.                 if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3509.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3510.  
  3511.                 // 4 times to maxItems to avoid frequent trimming.
  3512.                 // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3513.  
  3514.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3515.                 this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3516.                 if (cnt.canScrollToBottom_()) {
  3517.                   cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3518.                     .then(() => cnt.flushActiveItems78_(tid)) // async function
  3519.                     .then((asyncResult) => {
  3520.                       resResolve(asyncResult); // either undefined or 1
  3521.                       resResolve = null;
  3522.                     }).catch((e) => {
  3523.                       console.warn(e);
  3524.                       if (resResolve) resResolve();
  3525.                     });
  3526.                 } else {
  3527.                   resResolve(2);
  3528.                   resResolve = null;
  3529.                 }
  3530.               } catch (e) {
  3531.                 console.warn(e);
  3532.                 if (resResolve) resResolve();
  3533.               }
  3534.  
  3535.  
  3536.             });
  3537.  
  3538.           }
  3539.  
  3540.           mclp.flushActiveItems_ = function () {
  3541.             const cnt = this;
  3542.  
  3543.             if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3544.  
  3545.             if (cnt.activeItems_.length === 0) {
  3546.               cnt.__intermediate_delay__ = null;
  3547.               return;
  3548.             }
  3549.  
  3550.             const cntData = ((cnt || 0).data || 0);
  3551.             if (cntData.maxItemsToDisplay944 === undefined) {
  3552.               cntData.maxItemsToDisplay944 = null;
  3553.               if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3554.               cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3555.             }
  3556.  
  3557.             // ignore previous __intermediate_delay__ and create a new one
  3558.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3559.               cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3560.                 if (rt === 1) {
  3561.                   resolve(1); // success, scroll to bottom
  3562.                   if (hasMoreMessageState === 1) {
  3563.                     hasMoreMessageState = 0;
  3564.                     const showMore = (cnt.$ || 0)['show-more'];
  3565.                     if (showMore) {
  3566.                       showMore.classList.remove('has-new-messages-miuzp');
  3567.                     }
  3568.                   }
  3569.                 }
  3570.                 else if (rt === 2) {
  3571.                   resolve(2); // success, trim
  3572.                   if (hasMoreMessageState === 0) {
  3573.                     hasMoreMessageState = 1;
  3574.                     const showMore = cnt.$['show-more'];
  3575.                     if (showMore) {
  3576.                       showMore.classList.add('has-new-messages-miuzp');
  3577.                     }
  3578.                   }
  3579.                 }
  3580.                 else resolve(-1); // skip
  3581.               }).catch(e => {
  3582.                 console.warn(e);
  3583.               });
  3584.             });
  3585.  
  3586.           }
  3587.           console.log("flushActiveItems_", "OK");
  3588.         } else {
  3589.           console.log("flushActiveItems_", "NG");
  3590.         }
  3591.  
  3592.         mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3593.           try {
  3594.             if (mlg > 1e9) mlg = 9;
  3595.             const tid = ++mlg;
  3596.             const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3597.             const runCond = () => this.canScrollToBottom_();
  3598.             if (!keepTrialCond()) return;
  3599.             if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3600.             await new Promise(r => setTimeout(r, 80));
  3601.             if (!keepTrialCond()) return;
  3602.             if (runCond()) return this.flushActiveItems_() | 1;
  3603.             await new Promise(requestAnimationFrame);
  3604.             if (runCond()) return this.flushActiveItems_() | 1;
  3605.           } catch (e) {
  3606.             console.warn(e);
  3607.           }
  3608.         }
  3609.  
  3610.         if ((mclp.atBottomChanged_ || 0).length === 1) {
  3611.           // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3612.           assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3613.  
  3614.           const querySelector = HTMLElement.prototype.querySelector;
  3615.           const U = (element) => ({
  3616.             querySelector: (selector) => querySelector.call(element, selector)
  3617.           });
  3618.  
  3619.           let qid = 0;
  3620.           mclp.atBottomChanged_ = function (a) {
  3621.             let tid = ++qid;
  3622.             let b = this;
  3623.             a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3624.               if (tid !== qid) return;
  3625.               U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3626.             }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3627.               this.hideShowMoreAsync_ = null,
  3628.               U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3629.           }
  3630.  
  3631.           console.log("atBottomChanged_", "OK");
  3632.         } else {
  3633.           console.log("atBottomChanged_", "NG");
  3634.         }
  3635.  
  3636.         if ((mclp.onScrollItems_ || 0).length === 1) {
  3637.  
  3638.           assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3639.           mclp.onScrollItems66_ = mclp.onScrollItems_;
  3640.           mclp.onScrollItems77_ = async function (evt) {
  3641.             if (myw > 1e9) myw = 9;
  3642.             let tid = ++myw;
  3643.  
  3644.             await new Promise(requestAnimationFrame);
  3645.  
  3646.             if (tid !== myw) {
  3647.               return;
  3648.             }
  3649.  
  3650.             const cnt = this;
  3651.  
  3652.             await Promise.resolve();
  3653.             if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3654.               await Promise.resolve().then(() => {
  3655.                 this.ytRendererBehavior.onScroll(evt);
  3656.               }).then(() => {
  3657.                 if (this.canScrollToBottom_()) {
  3658.                   const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3659.                   if (hasUserJustInteracted) {
  3660.                     // only when there is an user action
  3661.                     this.setAtBottom();
  3662.                     return 1;
  3663.                   }
  3664.                 } else {
  3665.                   // no message inserting
  3666.                   this.setAtBottom();
  3667.                   return 1;
  3668.                 }
  3669.               }).then((r) => {
  3670.  
  3671.                 if (this.activeItems_.length) {
  3672.  
  3673.                   if (this.canScrollToBottom_()) {
  3674.                     this.flushActiveItems_();
  3675.                     return 1 && r;
  3676.                   } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3677.                     // delayed due to user action
  3678.                     this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3679.                     return 0;
  3680.                   }
  3681.                 }
  3682.               }).then((r) => {
  3683.                 if (r) {
  3684.                   // ensure setAtBottom is correctly set
  3685.                   this.setAtBottom();
  3686.                 }
  3687.               });
  3688.             } else {
  3689.               cnt.onScrollItems66_(evt);
  3690.             }
  3691.  
  3692.             await Promise.resolve();
  3693.  
  3694.           }
  3695.  
  3696.           mclp.onScrollItems_ = function (evt) {
  3697.  
  3698.             const cnt = this;
  3699.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3700.               cnt.onScrollItems77_(evt).then(() => {
  3701.                 resolve();
  3702.               });
  3703.             });
  3704.           }
  3705.           console.log("onScrollItems_", "OK");
  3706.         } else {
  3707.           console.log("onScrollItems_", "NG");
  3708.         }
  3709.  
  3710.         if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3711.  
  3712.           assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3713.           mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3714.  
  3715.           mclp.handleLiveChatActions77_ = async function (arr) {
  3716.             if (typeof (arr || 0).length !== 'number') {
  3717.               this.handleLiveChatActions66_(arr);
  3718.               return;
  3719.             }
  3720.             if (mzt > 1e9) mzt = 9;
  3721.             let tid = ++mzt;
  3722.  
  3723.             if (zarr === null) zarr = arr;
  3724.             else Array.prototype.push.apply(zarr, arr);
  3725.             arr = null;
  3726.  
  3727.             await new Promise(requestAnimationFrame);
  3728.  
  3729.             if (tid !== mzt || zarr === null) {
  3730.               return;
  3731.             }
  3732.  
  3733.             const carr = zarr;
  3734.             zarr = null;
  3735.  
  3736.             await Promise.resolve();
  3737.             this.handleLiveChatActions66_(carr);
  3738.             await Promise.resolve();
  3739.  
  3740.           }
  3741.  
  3742.           mclp.handleLiveChatActions_ = function (arr) {
  3743.  
  3744.             const cnt = this;
  3745.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3746.               cnt.handleLiveChatActions77_(arr).then(() => {
  3747.                 resolve();
  3748.               });
  3749.             });
  3750.           }
  3751.           console.log("handleLiveChatActions_", "OK");
  3752.         } else {
  3753.           console.log("handleLiveChatActions_", "NG");
  3754.         }
  3755.  
  3756.         mclp.hasUserJustInteracted11_ = () => {
  3757.           const t = dateNow();
  3758.           return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3759.         }
  3760.  
  3761.         if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3762.  
  3763.           assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3764.  
  3765.           mclp.canScrollToBottom_ = function () {
  3766.             return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3767.           }
  3768.  
  3769.           console.log("canScrollToBottom_", "OK");
  3770.         } else {
  3771.           console.log("canScrollToBottom_", "NG");
  3772.         }
  3773.  
  3774.         if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3775.  
  3776.           mclp.isSmoothScrollEnabled_ = function () {
  3777.             return false;
  3778.           }
  3779.  
  3780.           mclp.maybeResizeScrollContainer_ = function () {
  3781.             //
  3782.           }
  3783.  
  3784.           mclp.refreshOffsetContainerHeight_ = function () {
  3785.             //
  3786.           }
  3787.  
  3788.           mclp.smoothScroll_ = function () {
  3789.             //
  3790.           }
  3791.  
  3792.           mclp.resetSmoothScroll_ = function () {
  3793.             //
  3794.           }
  3795.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3796.         } else {
  3797.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3798.         }
  3799.  
  3800.         if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3801.  
  3802.           mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3803.           mclp.handleAddChatItemAction_ = function (a) {
  3804.             try {
  3805.               if (a && typeof a === 'object' && !('length' in a)) {
  3806.                 fixLiveChatItem(a.item, null);
  3807.                 console.assert(arguments[0] === a);
  3808.               }
  3809.             } catch (e) { console.warn(e) }
  3810.             return this.handleAddChatItemAction66_.apply(this, arguments);
  3811.           }
  3812.  
  3813.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3814.         } else {
  3815.  
  3816.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3817.         }
  3818.  
  3819.  
  3820.         if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3821.  
  3822.           mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3823.           mclp.handleReplaceChatItemAction_ = function (a) {
  3824.             try {
  3825.               if (a && typeof a === 'object' && !('length' in a)) {
  3826.                 fixLiveChatItem(a.replacementItem, null);
  3827.                 console.assert(arguments[0] === a);
  3828.               }
  3829.             } catch (e) { console.warn(e) }
  3830.             return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3831.           }
  3832.  
  3833.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3834.         } else {
  3835.  
  3836.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3837.         }
  3838.  
  3839.         console.log("[End]");
  3840.         console.groupEnd();
  3841.  
  3842.       }).catch(console.warn);
  3843.  
  3844.  
  3845.       const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3846.  
  3847.         let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3848.  
  3849.         if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3850.  
  3851.           // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3852.           let v = `${attrValue}`;
  3853.           // conside a ticker is 101px width
  3854.           // 1% = 1.01px
  3855.           // 0.2% = 0.202px
  3856.  
  3857.  
  3858.           const ratio1 = (yd.ratio * 100);
  3859.           if (ratio1 > -1) { // avoid NaN
  3860.  
  3861.             // countdownDurationMs
  3862.             // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3863.             // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3864.             // 150000 - 1%    <1% = 1.5s>
  3865.             // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3866.             // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3867.  
  3868.             // 99px * 5% = 4.95px
  3869.  
  3870.             // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3871.  
  3872.  
  3873.             // 1% Duration
  3874.  
  3875.             let ratio2 = ratio1;
  3876.  
  3877.             const ydd = yd.data;
  3878.             if (ydd) {
  3879.  
  3880.               const d1 = ydd.durationSec;
  3881.               const d2 = ydd.fullDurationSec;
  3882.  
  3883.               // @ step timing [min. 0.2%]
  3884.               let numOfSteps = 500;
  3885.               if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3886.                 if (d2 > 400) numOfSteps = 500; // 0.2%
  3887.                 else if (d2 > 200) numOfSteps = 200; // 0.5%
  3888.                 else if (d2 > 100) numOfSteps = 100; // 1%
  3889.                 else if (d2 > 50) numOfSteps = 50; // 2%
  3890.                 else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3891.                 else numOfSteps = 20;
  3892.               }
  3893.               if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3894.               if (numOfSteps < 5) numOfSteps = 5;
  3895.  
  3896.               const rd = numOfSteps / 100.0;
  3897.  
  3898.               ratio2 = Math.round(ratio2 * rd) / rd;
  3899.  
  3900.               // ratio2 = Math.round(ratio2 * 5) / 5;
  3901.               ratio2 = ratio2.toFixed(1);
  3902.               v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3903.  
  3904.               if (yd.__style_last__ === v) return;
  3905.               yd.__style_last__ = v;
  3906.               // do not consider any delay here.
  3907.               // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3908.  
  3909.             }
  3910.           }
  3911.  
  3912.           HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3913.  
  3914.  
  3915.         } else {
  3916.           HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3917.         }
  3918.  
  3919.       };
  3920.  
  3921.  
  3922.       const fpTicker = (renderer) => {
  3923.         const cnt = renderer.inst || renderer;
  3924.         assertor(() => typeof (cnt || 0).is === 'string');
  3925.         assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3926.         const container = (cnt.$ || 0).container;
  3927.         if (container) {
  3928.           assertor(() => (container || 0).nodeType === 1);
  3929.           assertor(() => typeof container.setAttribute === 'function');
  3930.           container.setAttribute = tickerContainerSetAttribute;
  3931.         } else {
  3932.           console.warn(`"container" does not exist in ${cnt.is}`);
  3933.         }
  3934.       };
  3935.  
  3936.  
  3937.       const tags = [
  3938.         "yt-live-chat-ticker-paid-message-item-renderer",
  3939.         "yt-live-chat-ticker-paid-sticker-item-renderer",
  3940.         "yt-live-chat-ticker-renderer",
  3941.         "yt-live-chat-ticker-sponsor-item-renderer"
  3942.       ];
  3943.  
  3944.  
  3945.       Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3946.  
  3947.         mightFirstCheckOnYtInit();
  3948.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3949.         console.log("[Begin]");
  3950.  
  3951.         // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3952.         let isMainVideoOngoing = null;
  3953.         let mainVideoLastProgress = null;
  3954.         // << end >>
  3955.  
  3956.         let dummyValueForStyleReturn = null;
  3957.  
  3958.         const genDummyValueForStyleReturn = () => {
  3959.           let s = `--nx:82;`
  3960.           let ro = {
  3961.             "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  3962.             "implementsGoogStringTypedString": true
  3963.           };
  3964.           ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  3965.           return ro;
  3966.         }
  3967.  
  3968.         const isCSSPropertySupported = () => {
  3969.  
  3970.           // @property --ticker-rtime
  3971.  
  3972.           if (typeof CSS !== 'object' || typeof (CSS || 0).registerProperty !== 'function') return;
  3973.           const documentElement = document.documentElement;
  3974.           if (!documentElement) {
  3975.             console.warn('document.documentElement is not found');
  3976.             return false;
  3977.           }
  3978.           if (`${getComputedStyle(documentElement).getPropertyValue('--ticker-rtime')}`.length === 0) {
  3979.             return false;
  3980.           }
  3981.           return true;
  3982.  
  3983.         };
  3984.  
  3985.  
  3986.         let windowShownAt = -1;
  3987.         const setupEventForWindowShownAt = () => {
  3988.           window.addEventListener('visibilitychange', () => {
  3989.             if (document.visibilityState === 'visible') windowShownAt = Date.now();
  3990.             else windowShownAt = 0;
  3991.           }, false);
  3992.         }
  3993.  
  3994.         const dProto = {
  3995.  
  3996.           attachedForTickerInit: function () {
  3997.  
  3998.             fpTicker(this.hostElement || this);
  3999.             return this.attached77();
  4000.  
  4001.           },
  4002.  
  4003.  
  4004.           // doAnimator
  4005.  
  4006.           _makeAnimator: function () {
  4007.             if (this._r782) return;
  4008.             // if (!this.isAttached) return;
  4009.             if (!this._runnerAE) {
  4010.               /** @type {HTMLElement | null} */
  4011.               const aElement = (this.$ || 0).container;
  4012.               if (!aElement) return console.warn("this.$.container is undefined");
  4013.               const da = this.data;
  4014.               if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  4015.               const c1 = this.colorFromDecimal(da.startBackgroundColor);
  4016.               const c2 = this.colorFromDecimal(da.endBackgroundColor);
  4017.               if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  4018.  
  4019.               // if (!this.__tickerBackgroundInitialChecked__) {
  4020.               //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  4021.               //   console.log('__tickerBackgroundInitialChecked__')
  4022.               //   this._checkTickerBackgroundChanged();
  4023.               // }
  4024.  
  4025.               aElement.style.setProperty('--ticker-c1', c1);
  4026.               aElement.style.setProperty('--ticker-c2', c2);
  4027.               aElement.classList.add(runTickerClassName);
  4028.               const p = (this.countdownMs / this.countdownDurationMs) * 100;
  4029.               // this._aeStartV = this.countdownMs;
  4030.               // this._aeStartT = this.countdownDurationMs;
  4031.               if (!(p >= 0 && p <= 100)) {
  4032.                 console.warn('incorrect time ratio', p);
  4033.               } else {
  4034.                 /*
  4035.                 const u0 = p.toFixed(4) + '%';
  4036.                 this._runnerAE = animate.call(aElement,
  4037.                   [
  4038.                     { '--ticker-rtime': u0 },
  4039.                     { '--ticker-rtime': '0%' }
  4040.                   ]
  4041.                   ,
  4042.                   {
  4043.                     fill: "forwards",
  4044.                     duration: this.countdownMs,
  4045.                     easing: "linear"
  4046.                   }
  4047.                 );
  4048.                 */
  4049.  
  4050.                 let timingFn = 'linear';
  4051.  
  4052.                 const totalDuration = this.countdownDurationMs;
  4053.  
  4054.                 if (ATTEMPT_ANIMATED_TICKER_BACKGROUND === 'steps') {
  4055.  
  4056.                   // @ step timing [min. 0.2%]
  4057.                   let stepInterval = 0.2; // unit: %
  4058.                   if (totalDuration > 400000) stepInterval = 0.2;
  4059.                   else if (totalDuration > 200000) stepInterval = 0.5;
  4060.                   else if (totalDuration > 100000) stepInterval = 1;
  4061.                   else if (totalDuration > 50000) stepInterval = 2;
  4062.                   else if (totalDuration > 25000) stepInterval = 5;
  4063.                   else stepInterval = 5;
  4064.  
  4065.                   let numOfSteps = Math.round(100 / stepInterval);
  4066.  
  4067.                   if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  4068.                   if (numOfSteps < 5) numOfSteps = 5;
  4069.  
  4070.                   timingFn = `steps(${numOfSteps}, end)`;
  4071.  
  4072.                 }
  4073.  
  4074.  
  4075.                 const ae = animate.call(aElement,
  4076.                   [
  4077.                     { '--ticker-rtime': '100%' },
  4078.                     { '--ticker-rtime': '0%' }
  4079.                   ]
  4080.                   ,
  4081.                   {
  4082.                     fill: "forwards",
  4083.                     duration: totalDuration,
  4084.                     easing: timingFn
  4085.                   }
  4086.                 );
  4087.  
  4088.                 this._runnerAE = ae;
  4089.  
  4090.                 ae.onfinish = (event) => {
  4091.                   this.onfinish = null;
  4092.                   if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  4093.                     this._aeFinished(event);
  4094.                   }
  4095.                 }
  4096.  
  4097.                 let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  4098.  
  4099.                 if (bq >= 0 && bq <= totalDuration) {
  4100.  
  4101.                   if (bq > totalDuration - 1) {
  4102.                     ae.currentTime = bq;
  4103.                     // setTimeout(() => {
  4104.                     //   if (this._runnerAE === ae && ae.onfinish) ae.onfinish();
  4105.                     // }, 1);
  4106.                   } else {
  4107.                     ae.currentTime = bq;
  4108.                   }
  4109.                 } else {
  4110.                   console.warn('Error on setting _runnerAE.currentTime!');
  4111.                 }
  4112.  
  4113.  
  4114.                 aeConstructor = ae.constructor; // constructor is from iframe
  4115.                 return ae;
  4116.               }
  4117.             } else {
  4118.               if (!aeConstructor) return console.warn('aeConstructor is undefined');
  4119.               // assume just time update
  4120.               const ae = this._runnerAE;
  4121.               if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  4122.               if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  4123.               let p = (this.countdownMs / this.countdownDurationMs) * 100;
  4124.               if (!(p >= 0 && p <= 100)) {
  4125.                 console.warn('incorrect time ratio', p);
  4126.               } else {
  4127.                 // let u0 = p.toFixed(4) + '%'
  4128.                 /*
  4129.                 ae.effect.setKeyframes([
  4130.                   { '--ticker-rtime': u0 },
  4131.                   { '--ticker-rtime': '0%' }
  4132.                 ]);
  4133.                 ae.effect.updateTiming({ duration: this.countdownMs });
  4134.                 */
  4135.                 // ae.currentTime = 0;
  4136.  
  4137.  
  4138.  
  4139.                 let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  4140.                 if (bq >= 0 && bq <= this.countdownDurationMs) {
  4141.  
  4142.                   this._runnerAE.currentTime = bq
  4143.                 } else {
  4144.                   console.warn('Error on setting _runnerAE.currentTime!');
  4145.                 }
  4146.  
  4147.  
  4148.                 ae.play();
  4149.                 return ae;
  4150.               }
  4151.             }
  4152.           },
  4153.  
  4154.           _aeFinished: function (event) {
  4155.  
  4156.             if (this._r782) return;
  4157.  
  4158.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4159.               this._throwOut();
  4160.               return;
  4161.             }
  4162.  
  4163.             if (doAnimator) {
  4164.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4165.  
  4166.               let lc = window.performance.now();
  4167.               this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4168.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4169.               this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = lc;
  4170.               if (this.countdownMs > 76) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs, this, event); // just warning.
  4171.  
  4172.               this.countdownMs = 0;
  4173.               this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null;
  4174.  
  4175.               if (this.isAttached) {
  4176.                 let fastRemoved = false;
  4177.                 if (Date.now() - windowShownAt < 80 && typeof this.requestRemoval === 'function') {
  4178.                   // no animation if the video page is switched from background to foreground
  4179.                   // this.hostElement.style.display = 'none';
  4180.                   const id = (this.data || 0).id || 0;
  4181.                   if (!id) this.data = { id: 1 }
  4182.                   try {
  4183.                     this.requestRemoval();
  4184.                     fastRemoved = true;
  4185.                   } catch (e) {
  4186.  
  4187.                   }
  4188.                 }
  4189.  
  4190.                 if (!fastRemoved) {
  4191.                   "auto" === this.hostElement.style.width && this.setContainerWidth();
  4192.                   this.slideDown();
  4193.                 }
  4194.               }
  4195.  
  4196.  
  4197.             } else {
  4198.               console.warn('unexpected issue')
  4199.             }
  4200.           },
  4201.  
  4202.  
  4203.           /** @type {()} */
  4204.           _throwOut: function () {
  4205.             this._r782 = 1;
  4206.             Promise.resolve().then(() => {
  4207.               if (typeof this.requestRemoval === 'function') {
  4208.                 const id = (this.data || 0).id;
  4209.                 if (!id) this.data = { id: 1 };
  4210.                 try {
  4211.                   this.requestRemoval();
  4212.                 } catch (e) { }
  4213.               }
  4214.               this.detached();
  4215.               this.data = null;
  4216.               this.countdownMs = 0;
  4217.               this.lastCountdownTimeMs = null;
  4218.               if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  4219.               if (this.__dataEnabled === true) this.__dataEnabled = false;
  4220.               if (this.__dataReady === true) this.__dataReady = false;
  4221.               const hm = this.hostElement || this;
  4222.               if (hm.parentNode) hm.remove();
  4223.               if (hm.firstChild) hm.textContent = '';
  4224.             }).catch(e => {
  4225.               console.warn(e);
  4226.             });
  4227.           },
  4228.  
  4229.  
  4230.           // doTimerFnModification
  4231.  
  4232.  
  4233.           /** @type {(a, b)} */
  4234.           startCountdownForTimerFnModA: function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4235.  
  4236.             // a.durationSec [s] => countdownMs [ms]
  4237.             // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4238.             // lastCountdownTimeMs => raf ongoing
  4239.             // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4240.  
  4241.             if (this._r782) return;
  4242.  
  4243.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4244.               this._throwOut();
  4245.               return;
  4246.             }
  4247.  
  4248.             // TimerFnModA
  4249.  
  4250.             b = void 0 === b ? 0 : b;
  4251.             if (void 0 !== a) {
  4252.               this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4253.               this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4254.               if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4255.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = performance.now()
  4256.                 this.rafId = 1
  4257.                 if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4258.                 this.detlaSincePausedSecs = 0;
  4259.                 const ae = this._makeAnimator();
  4260.                 if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4261.  
  4262.                 if (playerState === 2 && this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4263.  
  4264.                   // << This is mainly for [PlayBack Replay] backwards >>
  4265.                   // fix the case when the main video is paused but due to seeking the tickers are added
  4266.                   // play first then pause immediately to allow the visual effect of initial state
  4267.                   // don't forget to set the "playerProgressSec"
  4268.                   // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4269.                   this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4270.                   this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4271.                   this.detlaSincePausedSecs = 0;
  4272.                   this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4273.  
  4274.                 }
  4275.               }
  4276.             }
  4277.  
  4278.  
  4279.           },
  4280.  
  4281.  
  4282.  
  4283.           /** @type {(a, b)} */
  4284.           startCountdownForTimerFnModT: function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4285.  
  4286.             // a.durationSec [s] => countdownMs [ms]
  4287.             // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4288.             // lastCountdownTimeMs => raf ongoing
  4289.             // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4290.  
  4291.             if (this._r782) return;
  4292.  
  4293.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4294.               this._throwOut();
  4295.               return;
  4296.             }
  4297.  
  4298.             // TimerFnModT
  4299.  
  4300.             // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4301.             if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4302.             b = void 0 === b ? 0 : b;
  4303.             void 0 !== a && (this.countdownMs = 1E3 * a,
  4304.               this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4305.               this.ratio = 1,
  4306.               this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = performance.now(),
  4307.                 this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4308.  
  4309.  
  4310.           },
  4311.  
  4312.  
  4313.           /** @type {(a,)} */
  4314.           updateTimeoutForTimerFnModA: function (a) {
  4315.  
  4316.             // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  4317.  
  4318.             if (this._r782) return;
  4319.  
  4320.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4321.               this._throwOut();
  4322.               return;
  4323.             }
  4324.  
  4325.             // TimerFnModA
  4326.  
  4327.             if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4328.             if (this.lastCountdownTimeMs !== this._lastCountdownTimeMsX0) {
  4329.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4330.             }
  4331.             if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4332.             if (this.isAttached && this.countdownMs) {
  4333.               this.lastCountdownTimeMs = a
  4334.               const ae = this._makeAnimator(); // request raf
  4335.               if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4336.             } else {
  4337.               (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null,
  4338.                 this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4339.                   this.slideDown()));
  4340.             }
  4341.  
  4342.  
  4343.           },
  4344.  
  4345.           /** @type {(a,)} */
  4346.           updateTimeoutForTimerFnModT: function (a) {
  4347.  
  4348.             // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  4349.  
  4350.             if (this._r782) return;
  4351.  
  4352.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4353.               this._throwOut();
  4354.               return;
  4355.             }
  4356.  
  4357.             // TimerFnModT
  4358.  
  4359.             // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4360.             if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4361.             if (this.lastCountdownTimeMs !== this._lastCountdownTimeMsX0) {
  4362.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4363.             }
  4364.             this.ratio = this.countdownMs / this.countdownDurationMs;
  4365.             this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4366.               this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = null,
  4367.                 this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4368.                   this.slideDown()))
  4369.  
  4370.  
  4371.           },
  4372.  
  4373.           /** @type {(a,b)} */
  4374.           isAnimationPausedChangedForTimerFnModA: function (a, b) {
  4375.  
  4376.             if (this._r782) return;
  4377.  
  4378.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4379.               this._throwOut();
  4380.               return;
  4381.             }
  4382.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4383.             this._forceNoDetlaSincePausedSecs783 = 0;
  4384.  
  4385.             Promise.resolve().then(() => {
  4386.  
  4387.  
  4388.               // TimerFnModA
  4389.  
  4390.               const playState = (this._runnerAE || 0).playState;
  4391.               if (a && playState === 'running') {
  4392.  
  4393.               } else if (!a && playState !== 'running' && b) {
  4394.  
  4395.               } else {
  4396.                 return;
  4397.               }
  4398.  
  4399.               // TimerFnModA
  4400.  
  4401.  
  4402.               const pu = () => { // running -> pause
  4403.                 this._runnerAE.pause()
  4404.                 let lc = window.performance.now();
  4405.                 this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4406.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4407.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = lc;
  4408.               };
  4409.               const wa = () => { // pause -> running
  4410.                 if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4411.                 a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4412.                 this.detlaSincePausedSecs = 0;
  4413.                 this.updateTimeout(a);
  4414.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = window.performance.now();
  4415.               };
  4416.               a ? (this._runnerAE && pu()) : (!a && b && wa());
  4417.  
  4418.  
  4419.             }).catch(e => {
  4420.               console.log(e);
  4421.             });
  4422.  
  4423.  
  4424.  
  4425.           },
  4426.  
  4427.  
  4428.           /** @type {(a,b)} */
  4429.           isAnimationPausedChangedForTimerFnModT: function (a, b) {
  4430.  
  4431.             if (this._r782) return;
  4432.  
  4433.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4434.               this._throwOut();
  4435.               return;
  4436.             }
  4437.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4438.             this._forceNoDetlaSincePausedSecs783 = 0;
  4439.  
  4440.             Promise.resolve().then(() => {
  4441.  
  4442.               // TimerFnModT
  4443.  
  4444.               // ez++;
  4445.               // if(ez> 1e9) ez=9;
  4446.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4447.               a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4448.                 this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4449.                   this.detlaSincePausedSecs = 0),
  4450.                 this.boundUpdateTimeout37_(a),
  4451.                 this.lastCountdownTimeMs = this._lastCountdownTimeMsX0 = window.performance.now())
  4452.  
  4453.  
  4454.             }).catch(e => {
  4455.               console.log(e);
  4456.             });
  4457.  
  4458.  
  4459.  
  4460.           },
  4461.  
  4462.  
  4463.           /** @type {(a,b)} */
  4464.           computeContainerStyleForAnimatorEnabled: function (a, b) {
  4465.  
  4466.             if (this._r782) return;
  4467.  
  4468.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4469.               this._throwOut();
  4470.               return;
  4471.             }
  4472.  
  4473.             return (dummyValueForStyleReturn || (dummyValueForStyleReturn = genDummyValueForStyleReturn()));
  4474.  
  4475.           },
  4476.  
  4477.  
  4478.  
  4479.           /** @type {()} */
  4480.           handlePauseReplayForPlaybackProgressState: function () {
  4481.             if (playerState !== 2) return;
  4482.             if (this.isAttached) {
  4483.               if (this.rtk > 1e9) this.rtk = this.rtk % 1e4;
  4484.               const tid = ++this.rtk;
  4485.               getRafPromiseForTickers().then(() => {
  4486.                 if (tid === this.rtk) {
  4487.                   if (playerState === 2) {
  4488.                     this.handlePauseReplay66();
  4489.                     isMainVideoOngoing = false;
  4490.                   }
  4491.                 }
  4492.               })
  4493.             }
  4494.           },
  4495.  
  4496.           /** @type {()} */
  4497.           handleResumeReplayForPlaybackProgressState: function () {
  4498.             if (playerState === 2) return;
  4499.             if (this.isAttached) {
  4500.               if (this.rtk > 1e9) this.rtk = this.rtk % 1e4;
  4501.               const tid = ++this.rtk;
  4502.               getRafPromiseForTickers().then(() => {
  4503.                 if (tid === this.rtk) {
  4504.                   if (playerState === 3 || playerState === 1) {
  4505.                     this.handleResumeReplay66();
  4506.                     isMainVideoOngoing = true;
  4507.                   }
  4508.                 }
  4509.               })
  4510.             }
  4511.           },
  4512.  
  4513.           /** @type {(a,)} */
  4514.           handleReplayProgressForPlaybackProgressState: function (a) {
  4515.             if (this.isAttached) {
  4516.               mainVideoLastProgress = a;
  4517.               const tid = ++this.rtk;
  4518.               getRafPromiseForTickers().then(() => {
  4519.                 if (tid === this.rtk) {
  4520.                   this.handleReplayProgress66(mainVideoLastProgress);
  4521.                 }
  4522.               })
  4523.             }
  4524.           }
  4525.  
  4526.  
  4527.         }
  4528.  
  4529.  
  4530.         for (const tag of tags) { // ##tag##
  4531.           const dummy = document.createElement(tag);
  4532.  
  4533.           const cProto = getProto(dummy);
  4534.           if (!cProto || !cProto.attached) {
  4535.             console.warn(`proto.attached for ${tag} is unavailable.`);
  4536.             continue;
  4537.           }
  4538.  
  4539.           cProto.attached77 = cProto.attached;
  4540.  
  4541.           cProto.attached = dProto.attachedForTickerInit;
  4542.  
  4543.           let rafHackState = 0;
  4544.  
  4545.           let isTimingFunctionHackable = false;
  4546.  
  4547.           let urt = 0;
  4548.  
  4549.           if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  4550.  
  4551.             // console.log('startCountdown', typeof cProto.startCountdown)
  4552.             // console.log('updateTimeout', typeof cProto.updateTimeout)
  4553.             // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  4554.  
  4555.             isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  4556.  
  4557.           } else {
  4558.             console.log(`Skip Timing Function Modification for ${tag}`);
  4559.             continue;
  4560.           }
  4561.  
  4562.  
  4563.           if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  4564.  
  4565.             // cancelable - this.rafId < isAnimationPausedChanged >
  4566.             rafHackState = 1;
  4567.  
  4568.             if (isTimingFunctionHackable) {
  4569.               rafHackState = 2;
  4570.  
  4571.             } else {
  4572.               rafHackState = 4;
  4573.             }
  4574.  
  4575.           }
  4576.  
  4577.           const doAnimator = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && isCSSPropertySupported();
  4578.  
  4579.           const doRAFHack = rafHackState === 2;
  4580.  
  4581.           cProto._throwOut = dProto._throwOut;
  4582.  
  4583.           cProto._makeAnimator = doAnimator ? dProto._makeAnimator : null;
  4584.  
  4585.           cProto._aeFinished = doAnimator ? dProto._aeFinished : null;
  4586.  
  4587.  
  4588.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  4589.  
  4590.  
  4591.  
  4592.             if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  4593.               urt++;
  4594.               assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  4595.             } else {
  4596.               console.log('Error for setting cProto.handlePauseReplay', tag)
  4597.             }
  4598.  
  4599.             if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4600.               urt++;
  4601.               assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4602.             } else {
  4603.               console.log('Error for setting cProto.handleResumeReplay', tag)
  4604.             }
  4605.  
  4606.             if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4607.               urt++;
  4608.               assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4609.             } else {
  4610.               console.log('Error for setting cProto.handleReplayProgress', tag)
  4611.             }
  4612.  
  4613.  
  4614.  
  4615.           }
  4616.  
  4617.           const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4618.  
  4619.           if (ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED) {
  4620.  
  4621.             cProto.rtk = 0;
  4622.  
  4623.             cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  4624.             cProto.handlePauseReplay = dProto.handlePauseReplayForPlaybackProgressState;
  4625.  
  4626.             cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4627.             cProto.handleResumeReplay = dProto.handleResumeReplayForPlaybackProgressState;
  4628.  
  4629.             cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4630.             cProto.handleReplayProgress = dProto.handleReplayProgressForPlaybackProgressState;
  4631.  
  4632.           }
  4633.  
  4634.           const doTimerFnModification = (doRAFHack || doAnimator);
  4635.  
  4636.           if (doAnimator && windowShownAt < 0) {
  4637.             windowShownAt = 0;
  4638.             setupEventForWindowShownAt();
  4639.           }
  4640.  
  4641.           if (doTimerFnModification) {
  4642.  
  4643.             cProto.startCountdown = (
  4644.               doAnimator ? dProto.startCountdownForTimerFnModA : dProto.startCountdownForTimerFnModT
  4645.             );
  4646.  
  4647.             // _lastCountdownTimeMsX0 is required since performance.now() is not fully the same with rAF timestamp
  4648.             cProto.updateTimeout = (
  4649.               doAnimator ? dProto.updateTimeoutForTimerFnModA : dProto.updateTimeoutForTimerFnModT
  4650.             );
  4651.  
  4652.  
  4653.             // let ez = 0;
  4654.             cProto.isAnimationPausedChanged = (
  4655.               doAnimator ? dProto.isAnimationPausedChangedForTimerFnModA : dProto.isAnimationPausedChangedForTimerFnModT
  4656.             );
  4657.  
  4658.           }
  4659.  
  4660.           if (doAnimator) {
  4661.  
  4662.             assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4663.  
  4664.             cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4665.  
  4666.             cProto.computeContainerStyle = dProto.computeContainerStyleForAnimatorEnabled;
  4667.  
  4668.           }
  4669.  
  4670.           if (doTimerFnModification === true) hasTimerModified = true;
  4671.  
  4672.           if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  4673.             console.log('ATTEMPT_ANIMATED_TICKER_BACKGROUND', tag, doAnimator ? 'OK' : 'NG');
  4674.           }
  4675.  
  4676.           if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4677.             console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4678.           }
  4679.  
  4680.         }
  4681.  
  4682.         const selector = tags.join(', ');
  4683.         const elements = document.querySelectorAll(selector);
  4684.         if (elements.length >= 1) {
  4685.           for (const elm of elements) {
  4686.             if ((elm || elm.inst).isAttached === true) {
  4687.               fpTicker(elm);
  4688.             }
  4689.           }
  4690.         }
  4691.  
  4692.         console.log("[End]");
  4693.         console.groupEnd();
  4694.  
  4695.  
  4696.       }).catch(console.warn);
  4697.  
  4698.       customElements.whenDefined('yt-live-chat-ticker-renderer').then(() => {
  4699.  
  4700.         mightFirstCheckOnYtInit();
  4701.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-renderer hacks");
  4702.         console.log("[Begin]");
  4703.         (() => {
  4704.  
  4705.           const tag = "yt-live-chat-ticker-renderer"
  4706.           const dummy = document.createElement(tag);
  4707.  
  4708.           const cProto = getProto(dummy);
  4709.           if (!cProto || !cProto.attached) {
  4710.             console.warn(`proto.attached for ${tag} is unavailable.`);
  4711.             return;
  4712.           }
  4713.  
  4714.           if (RAF_FIX_keepScrollClamped) {
  4715.  
  4716.             // to be improved
  4717.  
  4718.             if (typeof cProto.keepScrollClamped === 'function' && !cProto.keepScrollClamped72 && fnIntegrity(cProto.keepScrollClamped) === '0.17.10') {
  4719.  
  4720.               cProto.keepScrollClamped72 = cProto.keepScrollClamped;
  4721.               cProto.keepScrollClamped = function () {
  4722.                 this._bound_keepScrollClamped = this._bound_keepScrollClamped || this.keepScrollClamped.bind(this);
  4723.                 this.scrollClampRaf = requestAnimationFrame(this._bound_keepScrollClamped);
  4724.                 this.maybeClampScroll()
  4725.               }
  4726.  
  4727.               console.log('RAF_FIX: keepScrollClamped', tag, "OK")
  4728.             } else {
  4729.  
  4730.               assertor(() => fnIntegrity(cProto.keepScrollClamped, '0.17.10'));
  4731.               console.log('RAF_FIX: keepScrollClamped', tag, "NG")
  4732.             }
  4733.  
  4734.           }
  4735.  
  4736.  
  4737.           if (RAF_FIX_scrollIncrementally && typeof cProto.startScrolling === 'function' && typeof cProto.scrollIncrementally === 'function' && fnIntegrity(cProto.startScrolling) === '1.44.32' && fnIntegrity(cProto.scrollIncrementally) === '1.82.43') {
  4738.             // to be replaced by animator
  4739.  
  4740.             cProto.startScrolling = function (a) {
  4741.               this.scrollStopHandle && this.cancelAsync(this.scrollStopHandle);
  4742.               this.asyncHandle && cancelAnimationFrame(this.asyncHandle);
  4743.               this.lastFrameTimestamp = this.scrollStartTime = performance.now();
  4744.               this.scrollRatePixelsPerSecond = a;
  4745.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4746.               this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally)
  4747.             };
  4748.  
  4749.             // related functions: startScrollBack, startScrollingLeft, startScrollingRight, etc.
  4750.  
  4751.             cProto.scrollIncrementally = (RAF_FIX_scrollIncrementally === 2) ? function (a) {
  4752.               const b = a - (this.lastFrameTimestamp || 0);
  4753.               const rate = this.scrollRatePixelsPerSecond
  4754.               const q = b / 1E3 * (rate || 0);
  4755.  
  4756.               const sl = this.$.items.scrollLeft;
  4757.               // console.log(rate, sl, q)
  4758.               if (this.lastFrameTimestamp == this.scrollStartTime) {
  4759.  
  4760.               } else if (q > -1e-5 && q < 1e-5) {
  4761.  
  4762.               } else {
  4763.                 let cond1 = sl > 0 && rate > 0 && q > 0;
  4764.                 let cond2 = sl > 0 && rate < 0 && q < 0;
  4765.                 let cond3 = sl < 1e-5 && sl > -1e-5 && rate > 0 && q > 0;
  4766.                 if (cond1 || cond2 || cond3) {
  4767.                   this.$.items.scrollLeft += q;
  4768.                   this.maybeClampScroll();
  4769.                   this.updateArrows();
  4770.                 }
  4771.               }
  4772.  
  4773.               this.lastFrameTimestamp = a;
  4774.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4775.               0 < this.$.items.scrollLeft || rate && 0 < rate ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  4776.             } : function (a) {
  4777.               const b = a - (this.lastFrameTimestamp || 0);
  4778.               this.$.items.scrollLeft += b / 1E3 * (this.scrollRatePixelsPerSecond || 0);
  4779.               this.maybeClampScroll();
  4780.               this.updateArrows();
  4781.               this.lastFrameTimestamp = a;
  4782.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4783.               0 < this.$.items.scrollLeft || this.scrollRatePixelsPerSecond && 0 < this.scrollRatePixelsPerSecond ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  4784.             };
  4785.  
  4786.             console.log(`RAF_FIX: scrollIncrementally${RAF_FIX_scrollIncrementally}`, tag, "OK")
  4787.           } else {
  4788.             assertor(() => fnIntegrity(cProto.startScrolling, '1.44.32'));
  4789.             assertor(() => fnIntegrity(cProto.scrollIncrementally, '1.82.43'));
  4790.             console.log('RAF_FIX: scrollIncrementally', tag, "NG")
  4791.           }
  4792.  
  4793.  
  4794.           if (CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED && typeof cProto.attached === 'function' && !cProto.attached37 && typeof cProto.detached === 'function' && !cProto.detached37) {
  4795.  
  4796.             cProto.attached37 = cProto.attached;
  4797.             cProto.detached37 = cProto.detached;
  4798.  
  4799.             let naohzId = 0;
  4800.             cProto.__naohzId__ = 0;
  4801.             cProto.attached = function () {
  4802.               Promise.resolve().then(() => {
  4803.  
  4804.                 const hostElement = this.hostElement || this;
  4805.                 if (!(hostElement instanceof HTMLElement)) return;
  4806.                 if (!HTMLElement.prototype.matches.call(hostElement, '.yt-live-chat-renderer')) return;
  4807.                 const ironPage = HTMLElement.prototype.closest.call(hostElement, 'iron-pages.yt-live-chat-renderer');
  4808.                 // or #chat-messages
  4809.                 if (!ironPage) return;
  4810.  
  4811.                 if (this.__naohzId__) removeEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  4812.                 if (naohzId > 1e9) naohzId = naohzId % 1e4;
  4813.                 this.__naohzId__ = ++naohzId;
  4814.                 ironPage.setAttribute('naohz', `${+this.__naohzId__}`);
  4815.  
  4816.                 addEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  4817.  
  4818.               });
  4819.               return this.attached37.apply(this, arguments);
  4820.             };
  4821.             cProto.detached = function () {
  4822.               Promise.resolve().then(() => {
  4823.  
  4824.                 const ironPage = document.querySelector(`iron-pages[naohz="${+this.__naohzId__}"]`);
  4825.                 if (!ironPage) return;
  4826.  
  4827.                 removeEventListener.call(ironPage, 'click', this.messageBoxClickHandlerForFade, { capture: false, passive: true });
  4828.  
  4829.               });
  4830.               return this.detached37.apply(this, arguments);
  4831.             };
  4832.  
  4833.             const clickFade = (p) => {
  4834.  
  4835.               let u = HTMLElement.prototype.querySelector.call(p, 'yt-live-chat-pinned-message-renderer:not([hidden]) #fade');
  4836.               if (u) {
  4837.                 u.click();
  4838.               }
  4839.             };
  4840.             cProto.messageBoxClickHandlerForFade = async (evt) => {
  4841.  
  4842.               const target = (evt || 0).target || 0;
  4843.               if (!target) return;
  4844.  
  4845.               for (let p = target; p instanceof HTMLElement; p = nodeParent(p)) {
  4846.                 const is = p.is;
  4847.                 if (typeof is === 'string' && is) {
  4848.  
  4849.                   if (is === 'yt-live-chat-pinned-message-renderer') {
  4850.                     return;
  4851.                   }
  4852.                   if (is === 'iron-pages' || is === 'yt-live-chat-renderer' || is === 'yt-live-chat-app') {
  4853.                     Promise.resolve(p).then(clickFade);
  4854.                     evt && evt.stopPropagation();
  4855.                     return;
  4856.                   }
  4857.                   if (is !== 'yt-live-chat-ticker-renderer') {
  4858.                     if (is.startsWith('yt-live-chat-ticker-')) return;
  4859.                     if (!is.endsWith('-renderer')) return;
  4860.                   }
  4861.  
  4862.                 } else {
  4863.                   if ((p.nodeName || '').includes('BUTTON')) return;
  4864.                 }
  4865.  
  4866.               }
  4867.             };
  4868.  
  4869.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - OK")
  4870.  
  4871.           } else {
  4872.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - NG")
  4873.           }
  4874.  
  4875.  
  4876.         })();
  4877.  
  4878.         console.log("[End]");
  4879.  
  4880.         console.groupEnd();
  4881.  
  4882.       }).catch(console.warn);
  4883.  
  4884.  
  4885.       if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4886.  
  4887.  
  4888.         customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4889.  
  4890.           mightFirstCheckOnYtInit();
  4891.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4892.           console.log("[Begin]");
  4893.           (() => {
  4894.  
  4895.             const tag = "yt-live-chat-message-input-renderer"
  4896.             const dummy = document.createElement(tag);
  4897.  
  4898.             const cProto = getProto(dummy);
  4899.             if (!cProto || !cProto.attached) {
  4900.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4901.               return;
  4902.             }
  4903.  
  4904.             let doHack = false;
  4905.             if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4906.  
  4907.               // not cancellable
  4908.  
  4909.  
  4910.               doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4911.  
  4912.             }
  4913.  
  4914.             if (doHack) {
  4915.  
  4916.               cProto.handleTimeout = function (a) {
  4917.                 console.log('cProto.handleTimeout', tag)
  4918.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4919.                 this.timeoutDurationMs = this.timeoutMs = a;
  4920.                 this.countdownRatio = 1;
  4921.                 0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4922.               };
  4923.               cProto.updateTimeout = function (a) {
  4924.                 console.log('cProto.updateTimeout', tag)
  4925.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4926.                 this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4927.                   this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4928.                 this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4929.                   rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4930.               };
  4931.  
  4932.               console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4933.             } else {
  4934.  
  4935.               console.log('typeof handleTimeout', typeof cProto.handleTimeout)
  4936.               console.log('typeof updateTimeout', typeof cProto.updateTimeout)
  4937.  
  4938.               console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4939.             }
  4940.  
  4941.           })();
  4942.  
  4943.           console.log("[End]");
  4944.  
  4945.           console.groupEnd();
  4946.  
  4947.  
  4948.         })
  4949.  
  4950.  
  4951.       }
  4952.  
  4953.       if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4954.  
  4955.  
  4956.         customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4957.  
  4958.           mightFirstCheckOnYtInit();
  4959.           groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4960.           console.log("[Begin]");
  4961.           (() => {
  4962.  
  4963.             const tag = "yt-emoji-picker-renderer"
  4964.             const dummy = document.createElement(tag);
  4965.  
  4966.             const cProto = getProto(dummy);
  4967.             if (!cProto || !cProto.attached) {
  4968.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4969.               return;
  4970.             }
  4971.  
  4972.             let doHack = false;
  4973.             if (typeof cProto.animateScroll_ === 'function') {
  4974.  
  4975.               // not cancellable
  4976.               console.log('animateScroll_', typeof cProto.animateScroll_)
  4977.  
  4978.               doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4979.  
  4980.             }
  4981.  
  4982.             if (doHack) {
  4983.  
  4984.               const querySelector = HTMLElement.prototype.querySelector;
  4985.               const U = (element) => ({
  4986.                 querySelector: (selector) => querySelector.call(element, selector)
  4987.               });
  4988.  
  4989.               cProto.animateScroll_ = function (a) {
  4990.                 // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4991.                 if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4992.                 this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4993.                 a -= this.lastAnimationTime_;
  4994.                 200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4995.                   rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4996.                     this.animationEnd_ = this.animationStart_ = null,
  4997.                     this.lastAnimationTime_ = 0);
  4998.                 this.updateButtons_()
  4999.               }
  5000.  
  5001.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  5002.             } else {
  5003.  
  5004.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  5005.             }
  5006.  
  5007.           })();
  5008.  
  5009.           console.log("[End]");
  5010.  
  5011.           console.groupEnd();
  5012.         });
  5013.       }
  5014.  
  5015.       if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  5016.  
  5017.  
  5018.         customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  5019.  
  5020.           mightFirstCheckOnYtInit();
  5021.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  5022.           console.log("[Begin]");
  5023.           (() => {
  5024.  
  5025.             const tag = "yt-live-chat-docked-message"
  5026.             const dummy = document.createElement(tag);
  5027.  
  5028.             const cProto = getProto(dummy);
  5029.             if (!cProto || !cProto.attached) {
  5030.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5031.               return;
  5032.             }
  5033.  
  5034.             let doHack = false;
  5035.             if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  5036.  
  5037.               // cancelable - this.intersectRAF <detached>
  5038.               // yt-live-chat-docked-message
  5039.               // boundCheckIntersections <-> checkIntersections
  5040.               // onDockableMessagesChanged
  5041.               //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  5042.  
  5043.               console.log('detached', typeof cProto.detached)
  5044.               console.log('checkIntersections', typeof cProto.checkIntersections)
  5045.               console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  5046.  
  5047.               doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  5048.  
  5049.             }
  5050.  
  5051.             if (doHack) {
  5052.  
  5053.               cProto.checkIntersections = function () {
  5054.                 // console.log('cProto.checkIntersections', tag)
  5055.                 if (this.dockableMessages.length) {
  5056.                   this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  5057.                   let a = this.dockableMessages[0]
  5058.                     , b = this.hostElement.getBoundingClientRect();
  5059.                   a = a.getBoundingClientRect();
  5060.                   let c = a.top - b.top
  5061.                     , d = 8 >= c;
  5062.                   c = 8 >= c - this.hostElement.clientHeight;
  5063.                   if (d) {
  5064.                     let e;
  5065.                     for (; d;) {
  5066.                       e = this.dockableMessages.shift();
  5067.                       d = this.dockableMessages[0];
  5068.                       if (!d)
  5069.                         break;
  5070.                       d = d.getBoundingClientRect();
  5071.                       c = d.top - b.top;
  5072.                       let f = 8 >= c;
  5073.                       if (8 >= c - a.height)
  5074.                         if (f)
  5075.                           a = d;
  5076.                         else
  5077.                           return;
  5078.                       d = f
  5079.                     }
  5080.                     this.dock(e)
  5081.                   } else
  5082.                     c && this.dockedItem && this.clear()
  5083.                 } else
  5084.                   this.intersectRAF = 0
  5085.               }
  5086.  
  5087.               cProto.onDockableMessagesChanged = function () {
  5088.                 // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  5089.                 this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  5090.               }
  5091.  
  5092.               cProto.detached = function () {
  5093.                 this.intersectRAF && rafHub.cancel(this.intersectRAF)
  5094.               }
  5095.  
  5096.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  5097.             } else {
  5098.  
  5099.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  5100.             }
  5101.  
  5102.           })();
  5103.  
  5104.           console.log("[End]");
  5105.  
  5106.           console.groupEnd();
  5107.  
  5108.         }).catch(console.warn);
  5109.  
  5110.       }
  5111.  
  5112.       if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  5113.  
  5114.  
  5115.         customElements.whenDefined("yt-img-shadow").then(() => {
  5116.  
  5117.           mightFirstCheckOnYtInit();
  5118.           groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  5119.           console.log("[Begin]");
  5120.           (() => {
  5121.  
  5122.             const tag = "yt-img-shadow"
  5123.             const dummy = document.createElement(tag);
  5124.  
  5125.             const cProto = getProto(dummy);
  5126.             if (!cProto || !cProto.attached) {
  5127.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5128.               return;
  5129.             }
  5130.  
  5131.             if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  5132.  
  5133.               cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  5134.               cProto.thumbnailChanged_ = function (a) {
  5135.  
  5136.                 if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  5137.                 if (!this.oldThumbnail_ && !this.thumbnail) return;
  5138.  
  5139.                 return this.thumbnailChanged66_.apply(this, arguments)
  5140.  
  5141.               }
  5142.               console.log("cProto.thumbnailChanged_ - OK");
  5143.  
  5144.             } else {
  5145.               console.log("cProto.thumbnailChanged_ - NG");
  5146.  
  5147.             }
  5148.             if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  5149.  
  5150.               cProto.setSrc66_ = cProto.setSrc_;
  5151.               cProto.setSrc_ = function (a) {
  5152.                 if ((((this || 0).$ || 0).img || 0).src === a) return;
  5153.                 return this.setSrc66_.apply(this, arguments)
  5154.               }
  5155.  
  5156.               console.log("cProto.setSrc_ - OK");
  5157.             } else {
  5158.  
  5159.               console.log("cProto.setSrc_ - NG");
  5160.             }
  5161.  
  5162.           })();
  5163.  
  5164.           console.log("[End]");
  5165.  
  5166.           console.groupEnd();
  5167.  
  5168.         }).catch(console.warn);
  5169.  
  5170.       }
  5171.  
  5172.       if (FIX_THUMBNAIL_DATACHANGED) {
  5173.  
  5174.  
  5175.  
  5176.         customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  5177.  
  5178.           mightFirstCheckOnYtInit();
  5179.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  5180.           console.log("[Begin]");
  5181.           (() => {
  5182.  
  5183.             const tag = "yt-live-chat-author-badge-renderer"
  5184.             const dummy = document.createElement(tag);
  5185.  
  5186.             const cProto = getProto(dummy);
  5187.             if (!cProto || !cProto.attached) {
  5188.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5189.               return;
  5190.             }
  5191.  
  5192.  
  5193.             if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  5194.  
  5195.  
  5196.  
  5197.               cProto.dataChanged86 = cProto.dataChanged;
  5198.               cProto.dataChanged = function (a) {
  5199.  
  5200.                 /*
  5201.  
  5202.                   for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  5203.                       b.removeChild(b.firstChild);
  5204.                   if (a)
  5205.                       if (a.icon) {
  5206.                           var c = document.createElement("yt-icon");
  5207.                           "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  5208.                           c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  5209.                           b.appendChild(c)
  5210.                       } else if (a.customThumbnail) {
  5211.                           c = document.createElement("img");
  5212.                           var d;
  5213.                           (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  5214.                           b.appendChild(c),
  5215.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  5216.                       }
  5217.  
  5218.                 */
  5219.  
  5220.                 const image = ((this || 0).$ || 0).image
  5221.                 if (image && a && image.firstElementChild) {
  5222.                   let exisiting = image.firstElementChild;
  5223.                   if (exisiting === image.lastElementChild) {
  5224.  
  5225.  
  5226.                     if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  5227.  
  5228.                       let c = exisiting;
  5229.                       if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  5230.                         if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  5231.                         if (c.defaultToFilled !== true) c.defaultToFilled = true;
  5232.                       } else {
  5233.                         let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  5234.                         if (c.icon !== p) c.icon = p;
  5235.                         if (c.defaultToFilled !== false) c.defaultToFilled = false;
  5236.                       }
  5237.                       return;
  5238.  
  5239.  
  5240.                     } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  5241.  
  5242.                       let c = exisiting;
  5243.                       if (a.customThumbnail.thumbnails.map(e => e.url).includes(c.src)) {
  5244.  
  5245.                         c.setAttribute("alt", this.hostElement.ariaLabel || "");
  5246.                         return;
  5247.                       }
  5248.                       /*
  5249.  
  5250.                       var d;
  5251.                       (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  5252.  
  5253.  
  5254.                         c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  5255.                         */
  5256.                     }
  5257.  
  5258.  
  5259.                   }
  5260.                 }
  5261.                 return this.dataChanged86.apply(this, arguments)
  5262.  
  5263.               }
  5264.               console.log("cProto.dataChanged - OK");
  5265.  
  5266.             } else {
  5267.               assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  5268.               console.log("cProto.dataChanged - NG");
  5269.  
  5270.             }
  5271.  
  5272.           })();
  5273.  
  5274.           console.log("[End]");
  5275.  
  5276.           console.groupEnd();
  5277.  
  5278.         }).catch(console.warn);
  5279.  
  5280.  
  5281.       }
  5282.  
  5283.  
  5284.       if (FIX_TOOLTIP_DISPLAY) {
  5285.  
  5286.  
  5287.         customElements.whenDefined("tp-yt-paper-tooltip").then(() => {
  5288.  
  5289.           mightFirstCheckOnYtInit();
  5290.           groupCollapsed("YouTube Super Fast Chat", " | tp-yt-paper-tooltip hacks");
  5291.           console.log("[Begin]");
  5292.           (() => {
  5293.  
  5294.             const tag = "tp-yt-paper-tooltip"
  5295.             const dummy = document.createElement(tag);
  5296.  
  5297.             const cProto = getProto(dummy);
  5298.             if (!cProto || !cProto.attached) {
  5299.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5300.               return;
  5301.             }
  5302.  
  5303.             if (typeof cProto.attached === 'function' && typeof cProto.detached === 'function' && cProto._readyClients && cProto._attachDom && cProto.ready && !cProto._readyClients43) {
  5304.  
  5305.               cProto._readyClients43 = cProto._readyClients;
  5306.               cProto._readyClients = function () {
  5307.                 let r = cProto._readyClients43.apply(this, arguments);
  5308.                 if (this.$ && this.$$ && this.$.tooltip) this.root = null; // fix this.root = null != (b = a.root) ? b : this.host
  5309.                 return r;
  5310.               }
  5311.  
  5312.               console.log("_readyClients - OK");
  5313.  
  5314.             } else {
  5315.               console.log("_readyClients - NG");
  5316.  
  5317.             }
  5318.  
  5319.             if (typeof cProto.show === 'function' && !cProto.show17) {
  5320.               cProto.show17 = cProto.show;
  5321.               cProto.show = function () {
  5322.  
  5323.                 let r = this.show17.apply(this, arguments);
  5324.                 this._showing === true && Promise.resolve().then(() => {
  5325.                   const tooltip = (this.$ || 0).tooltip;
  5326.  
  5327.                   if (tooltip && tooltip.firstElementChild === null) {
  5328.                     let text = tooltip.textContent;
  5329.                     if (typeof text === 'string' && text.length >= 2) {
  5330.                       tooltip.textContent = text.trim();
  5331.                     }
  5332.                   }
  5333.                 }).catch(console.warn)
  5334.                 return r;
  5335.               }
  5336.  
  5337.               console.log("trim tooltip content - OK");
  5338.  
  5339.             } else {
  5340.               console.log("trim tooltip content - NG");
  5341.  
  5342.             }
  5343.  
  5344.             /*
  5345.             cProto.updatePosition61 = cProto.updatePosition;
  5346.  
  5347.  
  5348.             cProto.updatePosition = function () {
  5349.  
  5350.  
  5351.               if (this._target && this.offsetParent) {
  5352.                 var a = this.offset;
  5353.                 14 != this.marginTop && 14 == this.offset && (a = this.marginTop);
  5354.                 var b = this.offsetParent.getBoundingClientRect()
  5355.                   , c = this._target.getBoundingClientRect()
  5356.                   , d = this.getBoundingClientRect()
  5357.                   , e = (c.width - d.width) / 2
  5358.                   , h = (c.height - d.height) / 2
  5359.                   , l = c.left - b.left
  5360.                   , m = c.top - b.top;
  5361.                 switch (this.position) {
  5362.                   case "top":
  5363.                     var p = l + e;
  5364.                     var q = m - d.height - a;
  5365.                     break;
  5366.                   case "bottom":
  5367.                     p = l + e;
  5368.                     q = m + c.height + a;
  5369.                     break;
  5370.                   case "left":
  5371.                     p = l - d.width - a;
  5372.                     q = m + h;
  5373.                     break;
  5374.                   case "right":
  5375.                     p = l + c.width + a,
  5376.                       q = m + h;
  5377.                 }
  5378.  
  5379.               if(this.ascee) {
  5380.                 this.fitToVisibleBounds = false;
  5381.               }
  5382.                 this.fitToVisibleBounds ? (b.left + p + d.width > window.innerWidth ? (this.style.right = "0px",
  5383.                   this.style.left = "auto") : (this.style.left = Math.max(0, p) + "px",
  5384.                     this.style.right = "auto"),
  5385.                   b.top + q + d.height > window.innerHeight ? (this.style.bottom = b.height + "px",
  5386.                     this.style.top = "auto") : (this.style.top = Math.max(-b.top, q) + "px",
  5387.                       this.style.bottom = "auto")) : (this.style.left = p + "px",
  5388.                         this.style.top = q + "px")
  5389.               }
  5390.             }
  5391.  
  5392.             cProto.updateStyles61 = cProto.updateStyles;
  5393.             cProto.updateStyles= function(){
  5394.               if(this.ascee) return;
  5395.               return this.updateStyles61.apply(this,arguments);
  5396.             }
  5397.             */
  5398.  
  5399.  
  5400.           })();
  5401.  
  5402.           console.log("[End]");
  5403.  
  5404.           console.groupEnd();
  5405.  
  5406.         }).catch(console.warn);
  5407.  
  5408.  
  5409.  
  5410.       }
  5411.  
  5412.  
  5413.  
  5414.       if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK) {
  5415.  
  5416.  
  5417.         const hookDocumentMouseDownSetupFn = () => {
  5418.  
  5419.  
  5420.  
  5421.           let muzTimestamp = 0;
  5422.           let nszDropdown = null;
  5423.  
  5424.  
  5425.  
  5426.           const handlerObject = {
  5427.  
  5428.             // mdHandler282 : function (evt) {
  5429.             //   // console.log(evt, 1, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5430.             //   if (!evt || !evt.isTrusted) return;
  5431.             //   muzTimestamp = 0;
  5432.             //   nszDropdown = null;
  5433.  
  5434.             //   const hostElement = this.hostElement || this;
  5435.             //   if (!evt || !evt.isTrusted || !hostElement.hasAttribute('menu-visible')) return;
  5436.             //   if (!hostElement.contains(evt.target)) return;
  5437.             //   let targetDropDown = null;
  5438.             //   for(const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')){
  5439.             //     if(dropdown && dropdown.positionTarget && hostElement.contains( dropdown.positionTarget)){
  5440.             //       targetDropDown = dropdown;
  5441.             //     }
  5442.             //   }
  5443.             //   if ((nszDropdown = targetDropDown)) {
  5444.             //     muzTimestamp = Date.now();
  5445.             //     evt.stopImmediatePropagation();
  5446.             //     evt.stopPropagation();
  5447.             //   }
  5448.  
  5449.             // },
  5450.  
  5451.  
  5452.             muHandler282: function (evt) {
  5453.               // console.log(evt, 7, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5454.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5455.               const dropdown = nszDropdown;
  5456.               muzTimestamp = 0;
  5457.               nszDropdown = null;
  5458.  
  5459.               const kurMPC = kRef(currentMenuPivotWR) || 0;
  5460.               const hostElement = kurMPC.hostElement || kurMPC;
  5461.               if (!hostElement.hasAttribute('menu-visible')) return;
  5462.  
  5463.               const chatBanner = HTMLElement.prototype.closest.call(hostElement, 'yt-live-chat-banner-renderer') || 0;
  5464.               if (chatBanner) return;
  5465.  
  5466.               if (dropdown && dropdown.positionTarget && hostElement.contains(dropdown.positionTarget)) {
  5467.  
  5468.                 /*
  5469.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  5470.                 if(parentButton) return;
  5471.                 */
  5472.  
  5473.                 muzTimestamp = Date.now();
  5474.                 evt.stopImmediatePropagation();
  5475.                 evt.stopPropagation();
  5476.                 Promise.resolve(dropdown).then((dropdown) => {
  5477.                   dropdown.cancel();
  5478.                 });
  5479.                 // document.body.click();
  5480.               }
  5481.  
  5482.             },
  5483.  
  5484.             mlHandler282: function (evt) {
  5485.               muzTimestamp = 0;
  5486.               nszDropdown = null;
  5487.             },
  5488.  
  5489.             ckHandler282: function (evt) {
  5490.               // console.log(evt, 3, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5491.  
  5492.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5493.               if (Date.now() - muzTimestamp < 40) {
  5494.  
  5495.                 /*
  5496.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  5497.                 if(parentButton) return;
  5498.                 */
  5499.  
  5500.                 muzTimestamp = Date.now();
  5501.                 evt.stopImmediatePropagation();
  5502.                 evt.stopPropagation();
  5503.               }
  5504.  
  5505.             },
  5506.  
  5507.             tapHandler282: function (evt) {
  5508.               // console.log(evt, 2, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5509.  
  5510.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5511.               if (Date.now() - muzTimestamp < 40) {
  5512.  
  5513.                 /*
  5514.                 const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  5515.                 if(parentButton) return;
  5516.                 */
  5517.  
  5518.                 muzTimestamp = Date.now();
  5519.                 evt.stopImmediatePropagation();
  5520.                 evt.stopPropagation();
  5521.               }
  5522.  
  5523.             },
  5524.  
  5525.  
  5526.             handleEvent(evt) {
  5527.  
  5528.  
  5529.               if (evt) {
  5530.                 const kurMPC = kRef(currentMenuPivotWR) || 0;
  5531.                 const cnt = kurMPC.inst || kurMPC;
  5532.                 const hostElement = cnt.hostElement || cnt;
  5533.                 if (!cnt || cnt.isAttached !== true || hostElement.isConnected !== true) return;
  5534.                 switch (evt.type) {
  5535.                   // case 'mousedown':
  5536.                   // return this.mdHandler282.call(kurMPC, evt);
  5537.                   case 'mouseup':
  5538.                     return this.muHandler282(evt);
  5539.                   case 'mouseleave':
  5540.                     return this.mlHandler282(evt);
  5541.                   case 'tap':
  5542.                     return this.tapHandler282(evt);
  5543.                   case 'click':
  5544.                     return this.ckHandler282(evt);
  5545.                 }
  5546.               }
  5547.  
  5548.             }
  5549.  
  5550.  
  5551.  
  5552.           }
  5553.  
  5554.           document.addEventListener('mousedown', function (evt) {
  5555.  
  5556.             if (!evt || !evt.isTrusted || !evt.target) return;
  5557.  
  5558.  
  5559.  
  5560.             muzTimestamp = 0;
  5561.             nszDropdown = null;
  5562.  
  5563.             /*
  5564.             const parentButton = HTMLElement.prototype.closest.call(evt.target, 'button, yt-icon, yt-icon-shape, icon-shape');
  5565.             if(parentButton){
  5566.               const kurMPC = HTMLElement.prototype.closest.call(parentButton, '[whole-message-clickable]') || 0;
  5567.               if(kurMPC){
  5568.                 evt.preventDefault();
  5569.                 evt.stopImmediatePropagation();
  5570.                 evt.stopPropagation();
  5571.               }
  5572.               return;
  5573.             }
  5574.             */
  5575.  
  5576.             /** @type {HTMLElement | null} */
  5577.             const kurMP = kRef(currentMenuPivotWR);
  5578.             if (!kurMP) return;
  5579.             const kurMPC = HTMLElement.prototype.closest.call(kurMP, '[menu-visible]') || 0;
  5580.  
  5581.             if (!kurMPC || !kurMPC.hasAttribute('whole-message-clickable')) return;
  5582.  
  5583.             if (!kurMPC.isClickableChatRow111 || !kurMPC.isClickableChatRow111() || !HTMLElement.prototype.contains.call(kurMPC, evt.target)) return;
  5584.  
  5585.             const chatBanner = HTMLElement.prototype.closest.call(kurMPC, 'yt-live-chat-banner-renderer') || 0;
  5586.             if (chatBanner) return;
  5587.  
  5588.  
  5589.             let targetDropDown = null;
  5590.             for (const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')) {
  5591.               if (dropdown && dropdown.positionTarget === kurMP) {
  5592.                 targetDropDown = dropdown;
  5593.               }
  5594.             }
  5595.  
  5596.             if (!targetDropDown) return;
  5597.  
  5598.  
  5599.             /*
  5600.             if (parentButton) {
  5601.               evt.preventDefault();
  5602.               evt.stopImmediatePropagation();
  5603.               evt.stopPropagation();
  5604.               currentMenuPivotWR = mWeakRef(kurMPC);
  5605.               return;
  5606.             } 
  5607.             */
  5608.  
  5609.             if ((nszDropdown = targetDropDown)) {
  5610.               muzTimestamp = Date.now();
  5611.               evt.stopImmediatePropagation();
  5612.               evt.stopPropagation();
  5613.               currentMenuPivotWR = mWeakRef(kurMPC);
  5614.  
  5615.               const listenOpts = { capture: true, passive: false, once: true };
  5616.  
  5617.               // remove unexcecuted eventHandler
  5618.               document.removeEventListener('mouseup', handlerObject, listenOpts);
  5619.               document.removeEventListener('mouseleave', handlerObject, listenOpts);
  5620.               document.removeEventListener('tap', handlerObject, listenOpts);
  5621.               document.removeEventListener('click', handlerObject, listenOpts);
  5622.  
  5623.               // inject one time eventHandler to by pass events
  5624.               document.addEventListener('mouseup', handlerObject, listenOpts);
  5625.               document.addEventListener('mouseleave', handlerObject, listenOpts);
  5626.               document.addEventListener('tap', handlerObject, listenOpts);
  5627.               document.addEventListener('click', handlerObject, listenOpts);
  5628.  
  5629.             }
  5630.  
  5631.           }, true);
  5632.  
  5633.         }
  5634.  
  5635.  
  5636.         // yt-live-chat-paid-message-renderer ??
  5637.  
  5638.         /*
  5639.         
  5640.         [...(new Set([...document.querySelectorAll('*')].filter(e=>e.is&&('shouldSupportWholeItemClick' in e)).map(e=>e.is))).keys()]
  5641.         
  5642.         
  5643.         "yt-live-chat-ticker-paid-message-item-renderer"
  5644.         "yt-live-chat-ticker-paid-sticker-item-renderer"
  5645.         "yt-live-chat-paid-message-renderer"
  5646.         "yt-live-chat-text-message-renderer"
  5647.         "yt-live-chat-paid-sticker-renderer"
  5648.         
  5649.         */
  5650.  
  5651.  
  5652.         whenDefinedMultiple([
  5653.  
  5654.           "yt-live-chat-paid-message-renderer",
  5655.           "yt-live-chat-membership-item-renderer",
  5656.           "yt-live-chat-paid-sticker-renderer",
  5657.           "yt-live-chat-text-message-renderer",
  5658.           "yt-live-chat-auto-mod-message-renderer",
  5659.  
  5660.           /*
  5661.           "yt-live-chat-ticker-paid-message-item-renderer",
  5662.           "yt-live-chat-ticker-paid-sticker-item-renderer",
  5663.           "yt-live-chat-paid-message-renderer",
  5664.           "yt-live-chat-text-message-renderer",
  5665.           "yt-live-chat-paid-sticker-renderer",
  5666.  
  5667.           "yt-live-chat-ticker-sponsor-item-renderer",
  5668.           "yt-live-chat-banner-header-renderer",
  5669.           "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5670.           "ytd-sponsorships-live-chat-header-renderer",
  5671.           "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  5672.  
  5673.  
  5674.  
  5675.  
  5676.           "yt-live-chat-auto-mod-message-renderer",
  5677.           "yt-live-chat-text-message-renderer",
  5678.           "yt-live-chat-paid-message-renderer",
  5679.  
  5680.           "yt-live-chat-legacy-paid-message-renderer",
  5681.           "yt-live-chat-membership-item-renderer",
  5682.           "yt-live-chat-paid-sticker-renderer",
  5683.           "yt-live-chat-donation-announcement-renderer",
  5684.           "yt-live-chat-moderation-message-renderer",
  5685.           "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5686.           "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  5687.           "yt-live-chat-viewer-engagement-message-renderer",
  5688.  
  5689.           */
  5690.  
  5691.  
  5692.         ]).then(sTags => {
  5693.  
  5694.  
  5695.           mightFirstCheckOnYtInit();
  5696.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-renderer(s)... hacks");
  5697.           console.log("[Begin]");
  5698.           let doMouseHook = false;
  5699.  
  5700.           const dProto = {
  5701.             isClickableChatRow111: function () {
  5702.               return (
  5703.                 this.data && typeof this.shouldSupportWholeItemClick === 'function' && typeof this.hasModerationOverlayVisible === 'function' &&
  5704.                 this.data.contextMenuEndpoint && this.wholeMessageClickable && this.shouldSupportWholeItemClick() && !this.hasModerationOverlayVisible()
  5705.               ); // follow .onItemTap(a)
  5706.             }
  5707.           };
  5708.  
  5709.           for (const sTag of sTags) { // ##tag##
  5710.  
  5711.  
  5712.             (() => {
  5713.  
  5714.  
  5715.  
  5716.               const tag = sTag;
  5717.               const dummy = document.createElement(tag);
  5718.  
  5719.               const cProto = getProto(dummy);
  5720.               if (!cProto || !cProto.attached) {
  5721.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  5722.                 return;
  5723.               }
  5724.  
  5725.  
  5726.               const dCnt = dummy || dummy.inst || 0;
  5727.               if ('wholeMessageClickable' in dCnt && typeof dCnt.hasModerationOverlayVisible === 'function' && typeof dCnt.shouldSupportWholeItemClick === 'function') {
  5728.  
  5729.  
  5730.  
  5731.  
  5732.  
  5733.  
  5734.                 cProto.isClickableChatRow111 = dProto.isClickableChatRow111;
  5735.  
  5736.  
  5737.  
  5738.                 const toHookDocumentMouseDown = typeof cProto.shouldSupportWholeItemClick === 'function' && typeof cProto.hasModerationOverlayVisible === 'function';
  5739.  
  5740.                 if (toHookDocumentMouseDown) {
  5741.                   doMouseHook = true;
  5742.                 }
  5743.  
  5744.  
  5745.  
  5746.                 console.log("shouldSupportWholeItemClick Y", tag);
  5747.  
  5748.  
  5749.               } else {
  5750.  
  5751.                 console.log("shouldSupportWholeItemClick N", tag);
  5752.               }
  5753.  
  5754.  
  5755.  
  5756.             })();
  5757.  
  5758.           }
  5759.  
  5760.  
  5761.           if (doMouseHook) {
  5762.  
  5763.             hookDocumentMouseDownSetupFn();
  5764.  
  5765.  
  5766.             console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent OK");
  5767.           }
  5768.  
  5769.           console.log("[End]");
  5770.  
  5771.           console.groupEnd();
  5772.  
  5773.  
  5774.         }).catch(console.warn);
  5775.  
  5776.  
  5777.         // https://www.youtube.com/watch?v=oQzFi1NO7io
  5778.  
  5779.  
  5780.       }
  5781.  
  5782.  
  5783.       const __showContextMenu_assign_lock_with_external_unlock_ = function (targetCnt) {
  5784.  
  5785.         let rr = null;
  5786.         const p1 = new Promise(resolve => {
  5787.           rr = resolve;
  5788.         });
  5789.  
  5790.         const p1unlock = () => {
  5791.           const f = rr;
  5792.           if (f) {
  5793.             rr = null;
  5794.             f();
  5795.           }
  5796.         }
  5797.  
  5798.         return {
  5799.           p1,
  5800.           p1unlock,
  5801.           assignLock: (targetCnt, timeout) => {
  5802.             targetCnt.__showContextMenu_assign_lock__(p1);
  5803.             if (timeout) setTimeout(p1unlock, timeout);
  5804.           }
  5805.         }
  5806.  
  5807.       }
  5808.  
  5809.       if (PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN) {
  5810.  
  5811.         document.addEventListener('mousedown', function (evt) {
  5812.  
  5813.           const maxloopDOMTreeElements = 4;
  5814.           const maxloopYtCompontents = 4;
  5815.           let j1 = 0;
  5816.           let j2 = 0;
  5817.           let target = (evt || 0).target || 0;
  5818.           if (!target) return;
  5819.  
  5820.  
  5821.           while (target instanceof HTMLElement) {
  5822.             if (++j1 > maxloopDOMTreeElements) break;
  5823.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') break;
  5824.             target = nodeParent(target);
  5825.           }
  5826.           const components = [];
  5827.           while (target instanceof HTMLElement) {
  5828.             if (++j2 > maxloopYtCompontents) break;
  5829.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') {
  5830.               components.push(target);
  5831.             }
  5832.             if (typeof (target.inst || target).showContextMenu === 'function') break;
  5833.             target = target.parentComponent || (target.inst || 0).parentComponent || null;
  5834.           }
  5835.           if (!(target instanceof HTMLElement)) return;
  5836.           const targetCnt = target.inst || target;
  5837.           if (typeof targetCnt.handleGetContextMenuResponse_ !== 'function' || typeof targetCnt.handleGetContextMenuError !== 'function') {
  5838.             console.log('Error Found: handleGetContextMenuResponse_ OR handleGetContextMenuError is not defined on a component with showContextMenu')
  5839.             return;
  5840.           }
  5841.  
  5842.           const endpoint = (targetCnt.data || 0).contextMenuEndpoint
  5843.           if (!endpoint) return;
  5844.           if (targetCnt.opened || !targetCnt.isAttached) return;
  5845.  
  5846.           if (typeof targetCnt.__cacheResolvedEndpointData__ !== 'function') {
  5847.             console.log(`preRequest for showContextMenu in ${targetCnt.is} is not yet supported.`)
  5848.           }
  5849.  
  5850.           let doPreRequest = false;
  5851.           if (components.length >= 2 && components[0].id === 'menu-button' && (target.$ || 0)['menu-button'] === components[0]) {
  5852.             doPreRequest = true;
  5853.           } else if (components.length === 1 && components[0] === target) {
  5854.             doPreRequest = true;
  5855.           } else if (components.length >= 2 && components[0].id === 'author-photo' && (target.$ || 0)['author-photo'] === components[0]) {
  5856.             doPreRequest = true;
  5857.           }
  5858.           if (doPreRequest === false) {
  5859.             console.log('doPreRequest = fasle on showContextMenu', components);
  5860.             return;
  5861.           }
  5862.  
  5863.           if (typeof targetCnt.__getCachedEndpointData__ !== 'function' || targetCnt.__getCachedEndpointData__(endpoint)) return;
  5864.  
  5865.           if ((typeof targetCnt.__showContextMenu_mutex_unlock_isEmpty__ === 'function') && !targetCnt.__showContextMenu_mutex_unlock_isEmpty__()) {
  5866.             console.log('preRequest on showContextMenu aborted due to stacked network request');
  5867.             return;
  5868.           }
  5869.  
  5870.  
  5871.           const onSuccess = (a) => {
  5872.             /*
  5873.  
  5874.               dQ() && (a = a.response);
  5875.               a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && this.showContextMenu_(a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5876.               a.actions && Eu(this.hostElement, "yt-live-chat-actions", [a.actions])
  5877.  
  5878.             */
  5879.  
  5880.             a = a.response || a;
  5881.  
  5882.             if (!a) {
  5883.               console.log('unexpected error in prerequest for showContextMenu.onSuccess');
  5884.               return;
  5885.             }
  5886.  
  5887.             let z = null;
  5888.             a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && (z = a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5889.  
  5890.             if (z) {
  5891.               a = z;
  5892.               targetCnt.__cacheResolvedEndpointData__(endpoint, a, true);
  5893.             }
  5894.  
  5895.           };
  5896.           const onFailure = (a) => {
  5897.  
  5898.             /*
  5899.  
  5900.               if (a instanceof Error || a instanceof Object || a instanceof String)
  5901.                   var b = a;
  5902.               hq(new xm("Error encountered calling GetLiveChatItemContextMenu",b))
  5903.  
  5904.             */
  5905.  
  5906.             targetCnt.__cacheResolvedEndpointData__(endpoint, null);
  5907.             // console.log('onFailure', a)
  5908.  
  5909.           };
  5910.  
  5911.           if (doPreRequest) {
  5912.  
  5913.             let propertyCounter = 0;
  5914.             const pm1 = __showContextMenu_assign_lock_with_external_unlock_(targetCnt);
  5915.             const p1Timeout = 800;
  5916.             const proxyKey = '__$$__proxy_to_this__$$__' + Date.now();
  5917.  
  5918.             try {
  5919.  
  5920.               const onSuccessHelperFn = function () {
  5921.                 pm1.p1unlock();
  5922.                 if (propertyCounter !== 5) {
  5923.                   console.log('Error in prerequest for showContextMenu.onSuccessHelperFn')
  5924.                   return;
  5925.                 }
  5926.                 if (this[proxyKey] !== targetCnt) {
  5927.                   console.log('Error in prerequest for showContextMenu.this');
  5928.                   return;
  5929.                 }
  5930.                 onSuccess(...arguments);
  5931.               };
  5932.               const onFailureHelperFn = function () {
  5933.                 pm1.p1unlock();
  5934.                 if (propertyCounter !== 5) {
  5935.                   console.log('Error in prerequest for showContextMenu.onFailureHelperFn')
  5936.                   return;
  5937.                 }
  5938.                 if (this[proxyKey] !== targetCnt) {
  5939.                   console.log('Error in prerequest for showContextMenu.this');
  5940.                   return;
  5941.                 }
  5942.                 onFailure(...arguments);
  5943.  
  5944.               }
  5945.               const fakeTargetCnt = new Proxy({
  5946.                 __showContextMenu_forceNativeRequest__: 1,
  5947.                 __showContextMenu_sync_mode_request__: 1,
  5948.                 get handleGetContextMenuResponse_() {
  5949.                   propertyCounter += 2;
  5950.                   return onSuccessHelperFn;
  5951.                 },
  5952.                 get handleGetContextMenuError() {
  5953.                   propertyCounter += 3;
  5954.                   return onFailureHelperFn;
  5955.                 }
  5956.               }, {
  5957.                 get(_, key, receiver) {
  5958.                   if (key in _) return _[key];
  5959.                   if (key === proxyKey) return targetCnt;
  5960.  
  5961.                   let giveNative = false;
  5962.                   if (key in targetCnt) {
  5963.                     if (key === 'data') giveNative = true;
  5964.                     else if (typeof targetCnt[key] === 'function') giveNative = true;
  5965.                   }
  5966.                   if (giveNative) return targetCnt[key];
  5967.                 }
  5968.               });
  5969.  
  5970.               const fakeEvent = (() => {
  5971.                 const { target, bubbles, cancelable, cancelBubble, srcElement, timeStamp, defaultPrevented, currentTarget, composed } = evt;
  5972.                 const nf = function () { }
  5973.                 const [stopPropagation, stopImmediatePropagation, preventDefault] = [nf, nf, nf];
  5974.  
  5975.                 return {
  5976.                   type: 'tap',
  5977.                   eventPhase: 0,
  5978.                   isTrusted: false,
  5979.                   __composed: true,
  5980.                   bubbles, cancelable, cancelBubble, timeStamp,
  5981.                   target, srcElement, defaultPrevented, currentTarget, composed,
  5982.                   stopPropagation, stopImmediatePropagation, preventDefault
  5983.                 };
  5984.               })(evt);
  5985.               targetCnt.showContextMenu.call(fakeTargetCnt, fakeEvent);
  5986.  
  5987.  
  5988.             } catch (e) {
  5989.               console.warn(e);
  5990.               propertyCounter = 7;
  5991.  
  5992.             }
  5993.             if (propertyCounter !== 5) {
  5994.               console.log('Error in prerequest for showContextMenu', propertyCounter);
  5995.               return;
  5996.             }
  5997.  
  5998.             pm1.assignLock(targetCnt, p1Timeout);
  5999.  
  6000.           }
  6001.  
  6002.  
  6003.  
  6004.  
  6005.  
  6006.  
  6007.         }, true);
  6008.  
  6009.  
  6010.       }
  6011.  
  6012.  
  6013.  
  6014.       /*
  6015.  
  6016.       const w=new Set(); for(const a of document.getElementsByTagName('*')) if(a.showContextMenu && a.showContextMenu_) w.add(a.is||''); console.log([...w.keys()])
  6017.  
  6018.       */
  6019.  
  6020.       whenDefinedMultiple([
  6021.         "yt-live-chat-ticker-sponsor-item-renderer",
  6022.         "yt-live-chat-banner-header-renderer",
  6023.         "yt-live-chat-text-message-renderer",
  6024.         "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  6025.         "ytd-sponsorships-live-chat-header-renderer",
  6026.         "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer",
  6027.  
  6028.         "yt-live-chat-paid-sticker-renderer",
  6029.         "yt-live-chat-viewer-engagement-message-renderer",
  6030.         "yt-live-chat-paid-message-renderer"
  6031.  
  6032.  
  6033.  
  6034.  
  6035.       ]).then(sTags => {
  6036.  
  6037.         mightFirstCheckOnYtInit();
  6038.         groupCollapsed("YouTube Super Fast Chat", " | fixShowContextMenu");
  6039.         console.log("[Begin]");
  6040.  
  6041.  
  6042.         const __showContextMenu_mutex__ = new Mutex();
  6043.         let __showContextMenu_mutex_unlock__ = null;
  6044.         let lastShowMenuTarget = null;
  6045.  
  6046.         function deepCopy(obj, skipKeys) {
  6047.           skipKeys = skipKeys || [];
  6048.           if (!obj || typeof obj !== 'object') return obj;
  6049.           if (Array.isArray(obj)) {
  6050.             return obj.map(item => deepCopy(item, skipKeys));
  6051.           }
  6052.           const copy = {};
  6053.           for (let key in obj) {
  6054.             if (!skipKeys.includes(key)) {
  6055.               copy[key] = deepCopy(obj[key], skipKeys);
  6056.             }
  6057.           }
  6058.           return copy;
  6059.         }
  6060.  
  6061.  
  6062.  
  6063.         const wm37 = new WeakMap();
  6064.  
  6065.         const dProto = {
  6066.  
  6067.  
  6068.           // CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN
  6069.  
  6070.           __cacheResolvedEndpointData__: (endpoint, a, doDeepCopy) => {
  6071.             if (a) {
  6072.               if (doDeepCopy) a = deepCopy(a);
  6073.               wm37.set(endpoint, a);
  6074.             } else {
  6075.               wm37.remove(endpoint);
  6076.             }
  6077.           },
  6078.           __getCachedEndpointData__: function (endpoint) {
  6079.             endpoint = endpoint || (this.data || 0).contextMenuEndpoint || 0;
  6080.             if (endpoint) return wm37.get(endpoint);
  6081.             return null;
  6082.           },
  6083.           /** @type {(resolvedEndpoint: any) => void 0} */
  6084.           __showCachedContextMenu__: function (resolvedEndpoint) { // non-null
  6085.  
  6086.             resolvedEndpoint = deepCopy(resolvedEndpoint);
  6087.             // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  6088.             Promise.resolve(resolvedEndpoint).then(() => {
  6089.               this.__showContextMenu_skip_cacheResolvedEndpointData__ = 1;
  6090.               this.showContextMenu_(resolvedEndpoint);
  6091.               this.__showContextMenu_skip_cacheResolvedEndpointData__ = 0;
  6092.             });
  6093.  
  6094.  
  6095.           },
  6096.  
  6097.  
  6098.  
  6099.           showContextMenuForCacheReopen: function (a) {
  6100.             if (!this.__showContextMenu_forceNativeRequest__) {
  6101.               const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  6102.               if (endpoint) {
  6103.                 const resolvedEndpoint = this.__getCachedEndpointData__(endpoint);
  6104.                 if (resolvedEndpoint) {
  6105.                   this.__showCachedContextMenu__(resolvedEndpoint);
  6106.                   a && a.stopPropagation()
  6107.                   return;
  6108.                 }
  6109.               }
  6110.             }
  6111.             return this.showContextMenu37(a);
  6112.           },
  6113.  
  6114.           showContextMenuForCacheReopen_: function (a) {
  6115.             if (!this.__showContextMenu_skip_cacheResolvedEndpointData__) {
  6116.               const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  6117.               if (endpoint) {
  6118.                 const f = this.__cacheResolvedEndpointData__;
  6119.                 if (typeof f === 'function') f(endpoint, a, true);
  6120.               }
  6121.             }
  6122.             return this.showContextMenu37_(a);
  6123.           },
  6124.  
  6125.           // ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU
  6126.  
  6127.           showContextMenuWithDisableScroll: function (a) {
  6128.  
  6129.             const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  6130.             if (endpoint && typeof this.is === 'string' && this.menuVisible === false && this.menuOpen === false) {
  6131.  
  6132.               const parentComponent = this.parentComponent;
  6133.               if (parentComponent && parentComponent.is === 'yt-live-chat-item-list-renderer' && parentComponent.contextMenuOpen === false && parentComponent.allowScroll === true) {
  6134.                 parentComponent.allowScroll = false;
  6135.               }
  6136.             }
  6137.  
  6138.             return this.showContextMenu48.apply(this, arguments);
  6139.  
  6140.           },
  6141.  
  6142.           // ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU
  6143.  
  6144.           __showContextMenu_mutex_unlock_isEmpty__: () => {
  6145.             return __showContextMenu_mutex_unlock__ === null;
  6146.           },
  6147.  
  6148.           __showContextMenu_assign_lock__: function (p) {
  6149.  
  6150.             const mutex = __showContextMenu_mutex__;
  6151.  
  6152.             mutex.lockWith(unlock => {
  6153.               p.then(unlock);
  6154.             });
  6155.  
  6156.           },
  6157.  
  6158.           showContextMenuWithMutex: function (a) {
  6159.             lastShowMenuTarget = this;
  6160.  
  6161.             if (this.__showContextMenu_sync_mode_request__) {
  6162.  
  6163.               return this.showContextMenu47(a);
  6164.             } else {
  6165.  
  6166.               const mutex = __showContextMenu_mutex__;
  6167.  
  6168.               mutex.lockWith(unlock => {
  6169.                 if (lastShowMenuTarget !== this) {
  6170.                   unlock();
  6171.                   return;
  6172.                 }
  6173.  
  6174.                 setTimeout(unlock, 800); // in case network failure
  6175.                 __showContextMenu_mutex_unlock__ = unlock;
  6176.                 try {
  6177.                   this.showContextMenu47(a);
  6178.                 } catch (e) {
  6179.                   console.warn(e);
  6180.                   unlock(); // in case function script error
  6181.                 }
  6182.  
  6183.               });
  6184.  
  6185.             }
  6186.  
  6187.  
  6188.           },
  6189.  
  6190.           showContextMenuWithMutex_: function (a) {
  6191.  
  6192.             if (__showContextMenu_mutex_unlock__ && this === lastShowMenuTarget) {
  6193.               __showContextMenu_mutex_unlock__();
  6194.               __showContextMenu_mutex_unlock__ = null;
  6195.             }
  6196.             return this.showContextMenu47_(a);
  6197.  
  6198.           }
  6199.  
  6200.         }
  6201.  
  6202.         for (const tag of sTags) { // ##tag##
  6203.  
  6204.  
  6205.  
  6206.           (() => {
  6207.  
  6208.             const dummy = document.createElement(tag);
  6209.  
  6210.             const cProto = getProto(dummy);
  6211.             if (!cProto || !cProto.attached) {
  6212.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6213.               return;
  6214.             }
  6215.  
  6216.  
  6217.  
  6218.  
  6219.             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) {
  6220.  
  6221.               cProto.showContextMenu37_ = cProto.showContextMenu_;
  6222.               cProto.showContextMenu37 = cProto.showContextMenu;
  6223.  
  6224.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  6225.               cProto.__cacheResolvedEndpointData__ = dProto.__cacheResolvedEndpointData__
  6226.               cProto.__getCachedEndpointData__ = dProto.__getCachedEndpointData__
  6227.               cProto.__showCachedContextMenu__ = dProto.__showCachedContextMenu__
  6228.  
  6229.               cProto.showContextMenu = dProto.showContextMenuForCacheReopen;
  6230.  
  6231.               cProto.showContextMenu_ = dProto.showContextMenuForCacheReopen_;
  6232.  
  6233.  
  6234.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - OK", tag);
  6235.  
  6236.  
  6237.  
  6238.             } else {
  6239.  
  6240.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - NG", tag);
  6241.  
  6242.             }
  6243.  
  6244.  
  6245.  
  6246.             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) {
  6247.  
  6248.  
  6249.               cProto.showContextMenu48 = cProto.showContextMenu;
  6250.  
  6251.  
  6252.               cProto.showContextMenu = dProto.showContextMenuWithDisableScroll;
  6253.  
  6254.  
  6255.  
  6256.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU - OK", tag);
  6257.  
  6258.  
  6259.  
  6260.             } else {
  6261.  
  6262.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU - NG", tag);
  6263.  
  6264.             }
  6265.  
  6266.  
  6267.  
  6268.  
  6269.  
  6270.             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) {
  6271.  
  6272.               cProto.showContextMenu47_ = cProto.showContextMenu_;
  6273.               cProto.showContextMenu47 = cProto.showContextMenu;
  6274.  
  6275.               cProto.__showContextMenu_mutex_unlock_isEmpty__ = dProto.__showContextMenu_mutex_unlock_isEmpty__;
  6276.               cProto.__showContextMenu_assign_lock__ = dProto.__showContextMenu_assign_lock__;
  6277.               cProto.showContextMenu = dProto.showContextMenuWithMutex;
  6278.               cProto.showContextMenu_ = dProto.showContextMenuWithMutex_;
  6279.  
  6280.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - OK", tag);
  6281.  
  6282.  
  6283.  
  6284.             } else {
  6285.  
  6286.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - NG", tag);
  6287.  
  6288.             }
  6289.  
  6290.  
  6291.  
  6292.  
  6293.           })();
  6294.  
  6295.         }
  6296.  
  6297.  
  6298.  
  6299.         console.log("[End]");
  6300.  
  6301.         console.groupEnd();
  6302.  
  6303.       }).catch(console.warn);
  6304.  
  6305.  
  6306.  
  6307.       customElements.whenDefined('tp-yt-iron-dropdown').then(() => {
  6308.  
  6309.         mightFirstCheckOnYtInit();
  6310.         groupCollapsed("YouTube Super Fast Chat", " | tp-yt-iron-dropdown hacks");
  6311.         console.log("[Begin]");
  6312.         (() => {
  6313.  
  6314.           const tag = "tp-yt-iron-dropdown";
  6315.           const dummy = document.createElement(tag);
  6316.  
  6317.           const cProto = getProto(dummy);
  6318.           if (!cProto || !cProto.attached) {
  6319.             console.warn(`proto.attached for ${tag} is unavailable.`);
  6320.             return;
  6321.           }
  6322.  
  6323.  
  6324.           if (USE_VANILLA_DEREF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf34 && fnIntegrity(cProto.__deraf) === '2.42.24') {
  6325.             cProto.__deraf_hn__ = function (sId, fn) {
  6326.               const rhKey = `_rafHandler_${sId}`;
  6327.               const m = this[rhKey] || (this[rhKey] = new WeakMap());
  6328.               if (m.has(fn)) return m.get(fn);
  6329.               const resFn = () => {
  6330.                 this.__rafs[sId] = null;
  6331.                 fn.call(this)
  6332.               };
  6333.               m.set(fn, resFn);
  6334.               m.set(resFn, resFn);
  6335.               return resFn;
  6336.             };
  6337.             cProto.__deraf34 = cProto.__deraf;
  6338.             cProto.__deraf = function (a, b) { // sId, fn
  6339.               let c = this.__rafs;
  6340.               null !== c[a] && cancelAnimationFrame(c[a]);
  6341.               c[a] = requestAnimationFrame(this.__deraf_hn__(a, b));
  6342.             };
  6343.             console.log("USE_VANILLA_DEREF - OK");
  6344.           } else {
  6345.             console.log("USE_VANILLA_DEREF - NG");
  6346.           }
  6347.  
  6348.           if (FIX_DROPDOWN_DERAF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf66) {
  6349.             cProto.__deraf66 = cProto.__deraf;
  6350.             cProto.__deraf = function (sId, fn) {
  6351.               if (this.__byPassRAF__) {
  6352.                 Promise.resolve().then(() => {
  6353.                   fn.call(this);
  6354.                 });
  6355.               }
  6356.               let r = this.__deraf66.apply(this, arguments);
  6357.               return r;
  6358.             }
  6359.             console.log("FIX_DROPDOWN_DERAF - OK");
  6360.           } else {
  6361.             console.log("FIX_DROPDOWN_DERAF - NG");
  6362.           }
  6363.  
  6364.  
  6365.           if (BOOST_MENU_OPENCHANGED_RENDERING && typeof cProto.__openedChanged === 'function' && !cProto.__mtChanged__ && fnIntegrity(cProto.__openedChanged) === '0.46.20') {
  6366.  
  6367.             let lastClose = null;
  6368.             let lastOpen = null;
  6369.             let cid = 0;
  6370.  
  6371.             cProto.__mtChanged__ = function (b) {
  6372.  
  6373.               Promise.resolve().then(() => {
  6374.                 this._applyFocus();
  6375.               }).then(() => {
  6376.                 b ? this._renderOpened() : this._renderClosed();
  6377.               }).catch(console.warn);
  6378.  
  6379.             };
  6380.  
  6381.             const __moChanged__ = () => {
  6382.               if (!cid) return;
  6383.               // console.log(553, !!lastOpen, !!lastClose);
  6384.               cid = 0;
  6385.               if (lastOpen && !lastClose && lastOpen.isAttached) {
  6386.                 lastOpen.__mtChanged__(1)
  6387.               } else if (lastClose && !lastOpen && lastClose.isAttached) {
  6388.                 lastClose.__mtChanged__(0);
  6389.               }
  6390.               lastOpen = null;
  6391.               lastClose = null;
  6392.             };
  6393.  
  6394.  
  6395.             if (typeof cProto._openedChanged === 'function' && !cProto._openedChanged66) {
  6396.               cProto._openedChanged66 = cProto._openedChanged;
  6397.               cProto._openedChanged = function () {
  6398.                 // this.__byPassRAF__ = !lastOpen ? true : false; // or just true?
  6399.                 this.__byPassRAF__ = true;
  6400.                 let r = this._openedChanged66.apply(this, arguments);
  6401.                 this.__byPassRAF__ = false;
  6402.                 return r;
  6403.               }
  6404.             }
  6405.  
  6406.             const pSetGet = (key, pdThis, pdBase) => {
  6407.               // note: this is not really a standard way for the getOwnPropertyDescriptors; but it is sufficient to make the job done
  6408.               return {
  6409.                 get: (pdThis[key] || 0).get || (pdBase[key] || 0).get,
  6410.                 set: (pdThis[key] || 0).set || (pdBase[key] || 0).set
  6411.               };
  6412.             };
  6413.  
  6414.             cProto.__modifiedMenuPropsFn__ = function () {
  6415.               const pdThis = Object.getOwnPropertyDescriptors(this.constructor.prototype)
  6416.               const pdBase = Object.getOwnPropertyDescriptors(this)
  6417.  
  6418.               const pdAutoFitOnAttach = pSetGet('autoFitOnAttach', pdThis, pdBase);
  6419.               const pdExpandSizingTargetForScrollbars = pSetGet('expandSizingTargetForScrollbars', pdThis, pdBase);
  6420.               const pdAllowOutsideScroll = pSetGet('allowOutsideScroll', pdThis, pdBase);
  6421.  
  6422.               if (pdAutoFitOnAttach.get || pdAutoFitOnAttach.set) {
  6423.                 console.warn('there is setter/getter for autoFitOnAttach');
  6424.                 return;
  6425.               }
  6426.               if (pdExpandSizingTargetForScrollbars.get || pdExpandSizingTargetForScrollbars.set) {
  6427.                 console.warn('there is setter/getter for expandSizingTargetForScrollbars');
  6428.                 return;
  6429.               }
  6430.               if (!pdAllowOutsideScroll.get || !pdAllowOutsideScroll.set) {
  6431.                 console.warn('there is NO setter-getter for allowOutsideScroll');
  6432.                 return;
  6433.               }
  6434.  
  6435.               let { autoFitOnAttach, expandSizingTargetForScrollbars, allowOutsideScroll } = this;
  6436.  
  6437.               this.__AllowOutsideScrollPD__ = pdAllowOutsideScroll;
  6438.  
  6439.               const fitEnable = CHAT_MENU_REFIT_ALONG_SCROLLING === 2;
  6440.  
  6441.               Object.defineProperties(this, {
  6442.                 autoFitOnAttach: {
  6443.                   get() {
  6444.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6445.                     return autoFitOnAttach;
  6446.                   },
  6447.                   set(nv) {
  6448.                     autoFitOnAttach = nv;
  6449.                     return true;
  6450.                   },
  6451.                   enumerable: true,
  6452.                   configurable: true
  6453.                 }, expandSizingTargetForScrollbars: {
  6454.                   get() {
  6455.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6456.                     return expandSizingTargetForScrollbars;
  6457.                   },
  6458.                   set(nv) {
  6459.                     expandSizingTargetForScrollbars = nv;
  6460.                     return true;
  6461.                   },
  6462.                   enumerable: true,
  6463.                   configurable: true
  6464.                 }, allowOutsideScroll: {
  6465.                   get() {
  6466.                     if (this._modifiedMenuPropOn062__) return true;
  6467.                     return allowOutsideScroll;
  6468.                   },
  6469.                   set(nv) {
  6470.                     allowOutsideScroll = nv;
  6471.                     this.__AllowOutsideScrollPD__.set.call(this, nv);
  6472.                     return true;
  6473.                   },
  6474.                   enumerable: true,
  6475.                   configurable: true
  6476.                 }
  6477.               })
  6478.             };
  6479.  
  6480.             /*
  6481.                // ***** position() to be changed. *****
  6482.               tp-yt-iron-dropdown[class], tp-yt-iron-dropdown[class] #contentWrapper, tp-yt-iron-dropdown[class] ytd-menu-popup-renderer[class] {
  6483.  
  6484.                   overflow: visible !important;
  6485.                   min-width: max-content !important;
  6486.                   max-width: max-content !important;
  6487.                   max-height: max-content !important;
  6488.                   min-height: max-content !important;
  6489.                   white-space: nowrap;
  6490.               }
  6491.  
  6492.             */
  6493.             if (FIX_MENU_POSITION_N_SIZING_ON_SHOWN && typeof cProto.position === 'function' && !cProto.position34 && typeof cProto.refit === 'function') {
  6494.  
  6495.               let m34 = 0;
  6496.               cProto.__refitByPosition__ = function () {
  6497.                 m34++;
  6498.                 if (m34 <= 0) m34 = 0;
  6499.                 if (m34 !== 1) return;
  6500.                 const hostElement = this.hostElement || this;
  6501.                 if (document.visibilityState === 'visible') {
  6502.                   const sizingTarget = this.sizingTarget;
  6503.                   if (!sizingTarget) {
  6504.                     m34 = 0;
  6505.                     return;
  6506.                   }
  6507.  
  6508.                   /*
  6509.                   let useVisibilityCollapse = true;
  6510.                   if (HTMLElement.prototype.querySelector.call(sizingTarget, 'yt-icon:empty')) {
  6511.                     useVisibilityCollapse = false;
  6512.                   }
  6513.  
  6514.                   if (useVisibilityCollapse) {
  6515.                     hostElement.style.visibility = 'collapse';
  6516.                     sizingTarget.style.visibility = 'collapse';
  6517.                   } else {
  6518.                     hostElement.setAttribute('rNgzQ', '');
  6519.                     sizingTarget.setAttribute('rNgzQ', '');
  6520.                   }
  6521.                   */
  6522.                   hostElement.setAttribute('rNgzQ', '');
  6523.                   sizingTarget.setAttribute('rNgzQ', '');
  6524.  
  6525.                   const gn = () => {
  6526.                     /*
  6527.                     if (useVisibilityCollapse) {
  6528.                       hostElement.style.visibility = '';
  6529.                       sizingTarget.style.visibility = '';
  6530.                     } else {
  6531.                       hostElement.removeAttribute('rNgzQ');
  6532.                       sizingTarget.removeAttribute('rNgzQ');
  6533.                     }
  6534.                     */
  6535.                     hostElement.removeAttribute('rNgzQ');
  6536.                     sizingTarget.removeAttribute('rNgzQ');
  6537.                   }
  6538.  
  6539.                   const an = async () => {
  6540.                     while (m34 >= 1) {
  6541.                       await renderReadyPn(sizingTarget);
  6542.                       if (this.opened && this.isAttached && sizingTarget.isConnected === true && sizingTarget === this.sizingTarget) {
  6543.                         if (sizingTarget.matches('ytd-menu-popup-renderer[slot="dropdown-content"].yt-live-chat-app')) this.refit();
  6544.                       }
  6545.                       m34--;
  6546.                     }
  6547.                     m34 = 0;
  6548.                     Promise.resolve().then(gn);
  6549.                   }
  6550.                   setTimeout(an, 4); // wait those resizing function calls
  6551.  
  6552.  
  6553.                 } else {
  6554.                   m34 = 0;
  6555.                 }
  6556.               }
  6557.               cProto.position34 = cProto.position
  6558.               cProto.position = function () {
  6559.                 if (this._positionInitialize_) {
  6560.                   this._positionInitialize_ = 0;
  6561.                   this.__refitByPosition__();
  6562.                 }
  6563.                 let r = cProto.position34.apply(this, arguments);
  6564.                 return r;
  6565.               }
  6566.               console.log("FIX_MENU_POSITION_ON_SHOWN - OK");
  6567.  
  6568.             } else {
  6569.  
  6570.               console.log("FIX_MENU_POSITION_ON_SHOWN - NG");
  6571.  
  6572.             }
  6573.  
  6574.  
  6575.  
  6576.             cProto.__openedChanged = function () {
  6577.               this._positionInitialize_ = 1;
  6578.               // this.removeAttribute('horizontal-align')
  6579.               // this.removeAttribute('vertical-align')
  6580.               if (typeof this.__menuTypeCheck__ !== 'boolean') {
  6581.                 this.__menuTypeCheck__ = true;
  6582.                 if (CHAT_MENU_SCROLL_UNLOCKING) {
  6583.                   this._modifiedMenuPropOn062__ = false;
  6584.                   // console.log(513, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6585.                   // this.autoFitOnAttach = true;
  6586.                   // this.expandSizingTargetForScrollbars = true;
  6587.                   // this.allowOutsideScroll = true;
  6588.                   // console.log(519,Object.getOwnPropertyDescriptors(this.constructor.prototype))
  6589.                   this.__modifiedMenuPropsFn__();
  6590.                   // this.constrain= function(){}
  6591.                   // this.position= function(){}
  6592.  
  6593.                   // this.autoFitOnAttach = true;
  6594.                   // this.expandSizingTargetForScrollbars = true;
  6595.                   // this.allowOutsideScroll = true;
  6596.                 }
  6597.               }
  6598.               if (CHAT_MENU_SCROLL_UNLOCKING && this.opened) {
  6599.                 let newValue = null;
  6600.                 const positionTarget = this.positionTarget;
  6601.                 if (positionTarget && positionTarget.classList.contains('yt-live-chat-text-message-renderer')) {
  6602.                   if (this._modifiedMenuPropOn062__ === false) {
  6603.                     newValue = true;
  6604.                   }
  6605.                 } else if (this._modifiedMenuPropOn062__ === true) {
  6606.                   newValue = false;
  6607.                 }
  6608.                 if (newValue !== null) {
  6609.                   const beforeAllowOutsideScroll = this.allowOutsideScroll;
  6610.                   this._modifiedMenuPropOn062__ = newValue;
  6611.                   const afterAllowOutsideScroll = this.allowOutsideScroll;
  6612.                   if (beforeAllowOutsideScroll !== afterAllowOutsideScroll) this.__AllowOutsideScrollPD__.set.call(this, afterAllowOutsideScroll);
  6613.                 }
  6614.               }
  6615.  
  6616.               if (this.opened) {
  6617.  
  6618.                 Promise.resolve().then(() => {
  6619.  
  6620.                   this._prepareRenderOpened();
  6621.                 }).then(() => {
  6622.                   this._manager.addOverlay(this);
  6623.                   if (this._manager._overlays.length === 1) {
  6624.                     lastOpen = this;
  6625.                     lastClose = null;
  6626.                   } else {
  6627.                     return 1;
  6628.                   }
  6629.                   // if (cid) {
  6630.                   //   clearTimeout(cid);
  6631.                   //   cid = -1;
  6632.                   //   this.__moChanged__();
  6633.                   //   cid = 0;
  6634.                   // } else {
  6635.                   //   cid = -1;
  6636.                   //   this.__moChanged__();
  6637.                   //   cid = 0;
  6638.                   // }
  6639.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6640.                   // console.log(580, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6641.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6642.                   cid = cid || requestAnimationFrame(__moChanged__);
  6643.                 }).then((r) => {
  6644.  
  6645.                   if (r) this.__mtChanged__(1);
  6646.                 }).catch(console.warn);
  6647.  
  6648.               } else {
  6649.                 Promise.resolve().then(() => {
  6650.                   this._manager.removeOverlay(this);
  6651.                   if (this._manager._overlays.length === 0) {
  6652.                     lastClose = this;
  6653.                     lastOpen = null;
  6654.                   } else {
  6655.                     return 1;
  6656.                   }
  6657.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6658.                   // console.log(581, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6659.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6660.                   cid = cid || requestAnimationFrame(__moChanged__);
  6661.                 }).then((r) => {
  6662.                   if (r) this.__mtChanged__(0);
  6663.                 }).catch(console.warn);
  6664.  
  6665.               }
  6666.  
  6667.             }
  6668.             console.log("BOOST_MENU_OPENCHANGED_RENDERING - OK");
  6669.  
  6670.           } else {
  6671.  
  6672.             assertor(() => fnIntegrity(cProto.__openedChanged, '0.46.20'));
  6673.             console.log("FIX_MENU_REOPEN_RENDER_PERFORMANC_1 - NG");
  6674.  
  6675.           }
  6676.  
  6677.  
  6678.           if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK && typeof cProto.__openedChanged === 'function' && !cProto.__openedChanged82) {
  6679.  
  6680.             cProto.__openedChanged82 = cProto.__openedChanged;
  6681.  
  6682.  
  6683.             cProto.__openedChanged = function () {
  6684.  
  6685.               // currentMenuPivotWR = null;
  6686.               // console.log(1480, '__openedChanged.A', this.positionTarget)
  6687.  
  6688.  
  6689.  
  6690.               // if (this.opened && this.positionTarget) {
  6691.  
  6692.               //   const positionTarget = this.positionTarget;
  6693.               //   console.log(1480, '__openedChanged.B', positionTarget)
  6694.               //   currentMenuPivotWR = mWeakRef(positionTarget);
  6695.  
  6696.               // }
  6697.  
  6698.               const positionTarget = this.positionTarget;
  6699.               currentMenuPivotWR = positionTarget ? mWeakRef(positionTarget) : null;
  6700.               return this.__openedChanged82.apply(this, arguments);
  6701.             }
  6702.           }
  6703.  
  6704.  
  6705.           // if(FIX_MENU_CAPTURE_SCROLL && typeof cProto.__onCaptureScroll === 'function' && !cProto.__onCaptureScroll66){
  6706.  
  6707.           //   cProto.__onCaptureScroll66 = cProto.__onCaptureScroll;
  6708.  
  6709.           //   cProto.__onCaptureScroll = function(a){
  6710.  
  6711.           //     const q = true;
  6712.           //     if(this.scrollAction === 'lock'  && q && this.opened){
  6713.  
  6714.           //       // console.log(9107, this.scrollAction, this.__isAnimating, this.opened, a); // lock; __isAnimating = false
  6715.           //       async function af() {
  6716.           //         this.__isAnimating && this._finishRenderOpened();
  6717.           //         if (!this.opened) return;
  6718.           //         this.__restoreScrollPosition();
  6719.           //         await new Promise(r => requestAnimationFrame(r));
  6720.           //         if (!this.opened) return;
  6721.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6722.           //         if (!this.opened) return;
  6723.           //         this.__restoreScrollPosition();
  6724.           //         await new Promise(r => requestAnimationFrame(r));
  6725.           //         if (!this.opened) return;
  6726.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6727.           //         if (!this.opened) return;
  6728.           //         this.opened && !this.__isAnimating && this.refit();
  6729.           //       }
  6730.           //       Promise.resolve().then(af);
  6731.  
  6732.           //        return cProto.__onCaptureScroll66.apply(this, arguments);
  6733.           //     }else{
  6734.  
  6735.           //       // console.log(9102, this.scrollAction, this.__isAnimating, this.opened, a); // lock
  6736.  
  6737.           //       return cProto.__onCaptureScroll66.apply(this, arguments);
  6738.           //     }
  6739.           //   }
  6740.           //   console.log("FIX_MENU_CAPTURE_SCROLL - OK");
  6741.           // }else{
  6742.           //   console.log("FIX_MENU_CAPTURE_SCROLL - NG");
  6743.  
  6744.           // }
  6745.  
  6746.  
  6747.         })();
  6748.  
  6749.         console.log("[End]");
  6750.  
  6751.         console.groupEnd();
  6752.  
  6753.       }).catch(console.warn);
  6754.  
  6755.  
  6756.  
  6757.  
  6758.  
  6759.  
  6760.  
  6761.  
  6762.       /*
  6763.  
  6764.  
  6765.  
  6766.  
  6767.  
  6768.           var FU = function() {
  6769.               var a = this;
  6770.               this.nextHandle_ = 1;
  6771.               this.clients_ = {};
  6772.               this.JSC$10323_callbacks_ = {};
  6773.               this.unsubscribeAsyncHandles_ = {};
  6774.               this.subscribe = vl(function(b, c, d) {
  6775.                   var e = Geb(b);
  6776.                   if (e in a.clients_)
  6777.                       e in a.unsubscribeAsyncHandles_ && Jq.cancel(a.unsubscribeAsyncHandles_[e]);
  6778.                   else {
  6779.                       a: {
  6780.                           var h = Geb(b), l;
  6781.                           for (l in a.unsubscribeAsyncHandles_) {
  6782.                               var m = a.clients_[l];
  6783.                               if (m instanceof KO) {
  6784.                                   delete a.clients_[l];
  6785.                                   delete a.JSC$10323_callbacks_[l];
  6786.                                   Jq.cancel(a.unsubscribeAsyncHandles_[l]);
  6787.                                   delete a.unsubscribeAsyncHandles_[l];
  6788.                                   i6a(m);
  6789.                                   m.objectId_ = new FQa(h);
  6790.                                   m.register();
  6791.                                   d = m;
  6792.                                   break a
  6793.                               }
  6794.                           }
  6795.                           d.objectSource = b.invalidationId.objectSource;
  6796.                           d.objectId = h;
  6797.                           if (b = b.webAuthConfigurationData)
  6798.                               b.multiUserSessionIndex && (d.sessionIndex = parseInt(b.multiUserSessionIndex, 10)),
  6799.                               b.pageId && (d.pageId = b.pageId);
  6800.                           d = new KO(d,a.handleInvalidationData_.bind(a));
  6801.                           d.register()
  6802.                       }
  6803.                       a.clients_[e] = d;
  6804.                       a.JSC$10323_callbacks_[e] = {}
  6805.                   }
  6806.                   d = a.nextHandle_++;
  6807.                   a.JSC$10323_callbacks_[e][d] = c;
  6808.                   return d
  6809.               })
  6810.           };
  6811.           FU.prototype.unsubscribe = function(a, b) {
  6812.               var c = Geb(a);
  6813.               if (c in this.JSC$10323_callbacks_ && (delete this.JSC$10323_callbacks_[c][b],
  6814.               !this.JSC$10323_callbacks_[c].length)) {
  6815.                   var d = this.clients_[c];
  6816.                   b = Jq.run(function() {
  6817.                       ei(d);
  6818.                       delete this.clients_[c];
  6819.                       delete this.unsubscribeAsyncHandles_[c]
  6820.                   }
  6821.                   .bind(this));
  6822.                   this.unsubscribeAsyncHandles_[c] = b
  6823.               }
  6824.           }
  6825.           ;
  6826.  
  6827.  
  6828.       */
  6829.  
  6830.  
  6831.  
  6832.  
  6833.       const onManagerFound = (dummyManager) => {
  6834.         if (!dummyManager || typeof dummyManager !== 'object') return;
  6835.  
  6836.         const mgrProto = dummyManager.constructor.prototype;
  6837.  
  6838.         let keyCallbackStore = '';
  6839.         for (const [key, v] of Object.entries(dummyManager)) {
  6840.           if (key.includes('_callbacks_')) keyCallbackStore = key;
  6841.         }
  6842.  
  6843.         if (!keyCallbackStore || typeof mgrProto.unsubscribe !== 'function' || mgrProto.unsubscribe.length !== 2) return;
  6844.  
  6845.         if (mgrProto.unsubscribe16) return;
  6846.  
  6847.         mgrProto.unsubscribe16 = mgrProto.unsubscribe;
  6848.  
  6849.         groupCollapsed("YouTube Super Fast Chat", " | *live-chat-manager* hacks");
  6850.         console.log("[Begin]");
  6851.  
  6852.  
  6853.         // const isEmptyObject = (a) => Object.keys(a).length === 0;
  6854.         const isEmptyObject = (obj) => {
  6855.           for (let key in obj) {
  6856.             if (obj.hasOwnProperty(key)) return false;
  6857.           }
  6858.           return true;
  6859.         }
  6860.  
  6861.         const idMapper = new Map();
  6862.  
  6863.         const convertId = function (objectId) {
  6864.           if (!objectId || typeof objectId !== 'string') return null;
  6865.  
  6866.           let result = idMapper.get(objectId)
  6867.           if (result) return result;
  6868.           result = atob(objectId.replace(/-/g, "+").replace(/_/g, "/"));
  6869.           idMapper.set(objectId, result)
  6870.           return result;
  6871.         }
  6872.  
  6873.  
  6874.         const rafHandleHolder = [];
  6875.  
  6876.         let pzw = 0;
  6877.         let lza = 0;
  6878.         const rafHandlerFn = () => {
  6879.           pzw = 0;
  6880.           if (rafHandleHolder.length === 1) {
  6881.             const f = rafHandleHolder[0];
  6882.             rafHandleHolder.length = 0;
  6883.             f();
  6884.           } else if (rafHandleHolder.length > 1) {
  6885.             const arr = rafHandleHolder.slice(0);
  6886.             rafHandleHolder.length = 0;
  6887.             for (const fn of arr) fn();
  6888.           }
  6889.         };
  6890.  
  6891.  
  6892.         if (CHANGE_MANAGER_UNSUBSCRIBE) {
  6893.  
  6894.           const checkIntegrityForSubscribe = (mgr) => {
  6895.             if (mgr
  6896.               && typeof mgr.unsubscribe16 === 'function' && mgr.unsubscribe16.length === 2
  6897.               && typeof mgr.subscribe18 === 'function' && (mgr.subscribe18.length === 0 || mgr.subscribe18.length === 3)) {
  6898.  
  6899.               const ns = new Set(Object.keys(mgr));
  6900.               const ms = new Set(Object.keys(mgr.constructor.prototype));
  6901.  
  6902.               if (ns.size >= 6 && ms.size >= 4) {
  6903.                 // including 'subscribe18'
  6904.                 // 'unsubscribe16', 'subscribe19'
  6905.  
  6906.                 let r = 0;
  6907.                 for (const k of ['nextHandle_', 'clients_', keyCallbackStore, 'unsubscribeAsyncHandles_', 'subscribe', 'subscribe18']) {
  6908.                   r += ns.has(k) ? 1 : 0;
  6909.                 }
  6910.                 for (const k of ['unsubscribe', 'handleInvalidationData_', 'unsubscribe16', 'subscribe19']) {
  6911.                   r += ms.has(k) ? 1 : 0;
  6912.                 }
  6913.                 if (r === 10) {
  6914.                   const isObject = (c) => (c || 0).constructor === Object;
  6915.  
  6916.                   if (isObject(mgr['clients_']) && isObject(mgr[keyCallbackStore]) && isObject(mgr['unsubscribeAsyncHandles_'])) {
  6917.  
  6918.                     return true;
  6919.                   }
  6920.  
  6921.  
  6922.                 }
  6923.  
  6924.               }
  6925.  
  6926.  
  6927.             }
  6928.             return false;
  6929.           }
  6930.  
  6931.           mgrProto.subscribe19 = function (o, f, opts) {
  6932.  
  6933.             const ct_clients_ = this.clients_ || 0;
  6934.             const ct_handles_ = this.unsubscribeAsyncHandles_ || 0;
  6935.  
  6936.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.subscribe18.apply(this, arguments);
  6937.  
  6938.             let objectId = ((o || 0).invalidationId || 0).objectId;
  6939.             if (!objectId) return this.subscribe18.apply(this, arguments);
  6940.             objectId = convertId(objectId);
  6941.  
  6942.             // console.log('subscribe', objectId, ct_clients_[objectId], arguments);
  6943.  
  6944.             if (ct_clients_[objectId]) {
  6945.               if (ct_handles_[objectId] < 0) delete ct_handles_[objectId];
  6946.             }
  6947.  
  6948.             return this.subscribe18.apply(this, arguments);
  6949.           }
  6950.  
  6951.           mgrProto.unsubscribe = function (o, d) {
  6952.             if (!this.subscribe18 && typeof this.subscribe === 'function') {
  6953.               this.subscribe18 = this.subscribe;
  6954.               this.subscribe = this.subscribe19;
  6955.               this.__doCustomSubscribe__ = checkIntegrityForSubscribe(this);
  6956.             }
  6957.             const ct_clients_ = this.clients_;
  6958.             const ct_handles_ = this.unsubscribeAsyncHandles_;
  6959.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.unsubscribe16.apply(this, arguments);
  6960.  
  6961.             let objectId = ((o || 0).invalidationId || 0).objectId;
  6962.             if (!objectId) return this.unsubscribe16.apply(this, arguments);
  6963.  
  6964.             objectId = convertId(objectId);
  6965.  
  6966.  
  6967.             // console.log('unsubscribe', objectId, ct_clients_[objectId], arguments);
  6968.  
  6969.             const callbacks = this[keyCallbackStore] || 0;
  6970.             const callbackObj = callbacks[objectId] || 0;
  6971.  
  6972.  
  6973.             if (callbackObj && (delete callbackObj[d], isEmptyObject(callbackObj))) {
  6974.               const w = ct_clients_[objectId];
  6975.               --lza;
  6976.               if (lza < -1e9) lza = -1;
  6977.               const qta = lza;
  6978.               rafHandleHolder.push(() => {
  6979.                 if (qta === ct_handles_[objectId]) {
  6980.                   const o = {
  6981.                     callbacks, callbackObj,
  6982.                     client: ct_clients_[objectId],
  6983.                     handle: ct_handles_[objectId]
  6984.                   };
  6985.                   let p = 0;
  6986.                   try {
  6987.                     if (ct_clients_[objectId] === w) {
  6988.                       w && "function" === typeof w.dispose && w.dispose();
  6989.                       delete ct_clients_[objectId];
  6990.                       delete ct_handles_[objectId];
  6991.                       p = 1;
  6992.                     } else {
  6993.                       // w && "function" === typeof w.dispose && w.dispose();
  6994.                       // delete ct_clients_[objectId];
  6995.                       // delete ct_handles_[objectId];
  6996.                       p = 2;
  6997.                     }
  6998.                   } catch (e) {
  6999.                     console.warn(e);
  7000.                   }
  7001.                   console.log(`unsubscribed: ${p}`, this, o);
  7002.                 }
  7003.               });
  7004.               ct_handles_[objectId] = qta;
  7005.               if (pzw === 0) {
  7006.                 pzw = requestAnimationFrame(rafHandlerFn);
  7007.               }
  7008.             }
  7009.           }
  7010.  
  7011.  
  7012.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - OK")
  7013.  
  7014.         } else {
  7015.  
  7016.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - NG")
  7017.         }
  7018.  
  7019.         console.log("[End]");
  7020.  
  7021.         console.groupEnd();
  7022.  
  7023.       }
  7024.  
  7025.  
  7026.  
  7027.       /*
  7028.  
  7029.  
  7030.               a.prototype.async = function(e, h) {
  7031.                   return 0 < h ? Iq.run(e.bind(this), h) : ~Kq.run(e.bind(this))
  7032.               }
  7033.               ;
  7034.               a.prototype.cancelAsync = function(e) {
  7035.                   0 > e ? Kq.cancel(~e) : Iq.cancel(e)
  7036.               }
  7037.  
  7038.       */
  7039.  
  7040.  
  7041.  
  7042.       customElements.whenDefined("yt-invalidation-continuation").then(() => {
  7043.  
  7044.         let __dummyManager__ = null;
  7045.  
  7046.         mightFirstCheckOnYtInit();
  7047.         groupCollapsed("YouTube Super Fast Chat", " | yt-invalidation-continuation hacks");
  7048.         console.log("[Begin]");
  7049.         (() => {
  7050.  
  7051.           const tag = "yt-invalidation-continuation"
  7052.           const dummy = document.createElement(tag);
  7053.  
  7054.           const cProto = getProto(dummy);
  7055.           if (!cProto || !cProto.attached) {
  7056.             console.warn(`proto.attached for ${tag} is unavailable.`);
  7057.             return;
  7058.           }
  7059.  
  7060.           const dummyManager = (dummy.inst || dummy).manager_ || 0;
  7061.           __dummyManager__ = dummyManager;
  7062.  
  7063.           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) {
  7064.  
  7065.  
  7066.             const rafHub = new RAFHub();
  7067.  
  7068.             rafHub.keepRAF = true;
  7069.             cProto.async71 = cProto.async;
  7070.             cProto.cancelAsync71 = cProto.cancelAsync;
  7071.  
  7072.             // mostly for subscription timeoutMs 10000ms
  7073.             let mcw = 1; // 1, 3, 5, ...
  7074.             let arr = new Map();
  7075.  
  7076.             let __asyncInited__ = 0;
  7077.             let __timeoutStartId__ = null;
  7078.             const __asyncInit__ = () => {
  7079.  
  7080.               if (__asyncInited__) return;
  7081.               __asyncInited__ = 1;
  7082.  
  7083.               __timeoutStartId__ = setTimeout(() => { });
  7084.               mcw = __timeoutStartId__ * 2 + 1;
  7085.  
  7086.               setInterval(() => {
  7087.  
  7088.                 if (!arr.length) return;
  7089.  
  7090.                 const p = Date.now();
  7091.                 let deleteKeys = [];
  7092.                 arr.forEach((entry, key) => {
  7093.  
  7094.  
  7095.                   if (entry.cid === -1) {
  7096.                     entry.cid = -2;
  7097.                   } else if (entry.cid === -2) {
  7098.  
  7099.                     let offset = p - entry.add
  7100.                     if (offset < 0) offset = 0;
  7101.                     let delay2 = entry.delay - offset;
  7102.                     if (delay2 < 0) delay2 = 0;
  7103.                     entry.cid = setTimeout(entry.q(), delay2);
  7104.                     entry.q = null;
  7105.  
  7106.                   } else if (entry.add + entry.delay < p) {
  7107.                     deleteKeys.push(key);
  7108.  
  7109.                   }
  7110.  
  7111.                 })
  7112.  
  7113.                 for (const key of deleteKeys) arr.delete(key);
  7114.  
  7115.               }, 2000)
  7116.  
  7117.             }
  7118.  
  7119.  
  7120.  
  7121.  
  7122.             cProto.async = function (e, h) {
  7123.  
  7124.               if (!(0 < h)) return this.async71(e, h); // unknown timing Fn
  7125.  
  7126.               if (h < 8000) return this.async71(e, h) * 2; // native setTimeout
  7127.  
  7128.               if (typeof h !== 'number') return this.async71(e, h); // exceptional case
  7129.  
  7130.  
  7131.               if (!this.__asyncInited__) {
  7132.                 this.__asyncInited__ = 1;
  7133.                 __asyncInit__();
  7134.               }
  7135.               mcw += 2; // 2K+3, 2K+4, ...
  7136.               if (mcw > 1e9) mcw = mcw % 1e4;
  7137.               const cid = mcw;
  7138.               const q = () => {
  7139.                 return () => {
  7140.                   console.log('async h > 8000');
  7141.                   e.call(this);
  7142.                 }
  7143.               }
  7144.               // setTimeout(q, delay)
  7145.               arr.set(cid, {
  7146.                 cid: -1, // -1 -> -2 -> cid
  7147.                 add: Date.now(),
  7148.                 q,
  7149.                 delay: h
  7150.               });
  7151.               // console.log('cid-async', cid)
  7152.               return cid;
  7153.  
  7154.             }
  7155.  
  7156.  
  7157.             cProto.cancelAsync = function (e) {
  7158.  
  7159.               if (typeof e !== 'number') return this.cancelAsync71(e); // exceptional case
  7160.  
  7161.               // console.log('cid-unasync', e)
  7162.  
  7163.               if (0 > e) return this.cancelAsync71(e); // unknown timing fn
  7164.  
  7165.               if (e > __timeoutStartId__ * 2) { // __timeoutStartId__ is recorded and min is 2K+1
  7166.  
  7167.                 if ((e % 2) === 0) return this.cancelAsync71(e / 2); // 2(K+1), 2(K+2), ...
  7168.  
  7169.                 if (!arr.has(e)) return; // duplciated cancel
  7170.  
  7171.                 const entry = arr.get(e);
  7172.                 if (entry.cid < 0) {
  7173.                   entry.cid = 0;
  7174.                   arr.delete(e);
  7175.                 } else {
  7176.                   clearTimeout(entry.cid); // cid >= 1
  7177.                   entry.cid = 0;
  7178.                   arr.delete(e);
  7179.                 }
  7180.  
  7181.               } else {
  7182.  
  7183.                 return this.cancelAsync71(e);
  7184.  
  7185.               }
  7186.  
  7187.             }
  7188.  
  7189.             console.log("CHANGE_DATA_FLUSH_ASYNC - OK");
  7190.  
  7191.           } else {
  7192.             console.log("CHANGE_DATA_FLUSH_ASYNC - NG");
  7193.  
  7194.           }
  7195.  
  7196.         })();
  7197.  
  7198.         console.log("[End]");
  7199.  
  7200.         console.groupEnd();
  7201.  
  7202.  
  7203.  
  7204.         onManagerFound(__dummyManager__);
  7205.  
  7206.       }).catch(console.warn);
  7207.  
  7208.  
  7209.  
  7210.  
  7211.       if (INTERACTIVITY_BACKGROUND_ANIMATION >= 1) {
  7212.  
  7213.  
  7214.  
  7215.         customElements.whenDefined("yt-live-interactivity-component-background").then(() => {
  7216.  
  7217.  
  7218.           mightFirstCheckOnYtInit();
  7219.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-interactivity-component-background hacks");
  7220.           console.log("[Begin]");
  7221.           (() => {
  7222.  
  7223.             const tag = "yt-live-interactivity-component-background"
  7224.             const dummy = document.createElement(tag);
  7225.  
  7226.             const cProto = getProto(dummy);
  7227.             if (!cProto || !cProto.attached) {
  7228.               console.warn(`proto.attached for ${tag} is unavailable.`);
  7229.               return;
  7230.             }
  7231.  
  7232.  
  7233.             if (INTERACTIVITY_BACKGROUND_ANIMATION >= 1 && typeof cProto.maybeLoadAnimationBackground === 'function' && !cProto.maybeLoadAnimationBackground77 && cProto.maybeLoadAnimationBackground.length === 0) {
  7234.  
  7235.               cProto.maybeLoadAnimationBackground77 = cProto.maybeLoadAnimationBackground;
  7236.               cProto.maybeLoadAnimationBackground = function () {
  7237.                 let toRun = true;
  7238.                 if (!this.__bypassDisableAnimationBackground__) {
  7239.                   if (INTERACTIVITY_BACKGROUND_ANIMATION === 1) {
  7240.                     if (!this.lottieAnimation) {
  7241.                       if (this.useAnimationBackground === true) {
  7242.                         console.log('DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION', this.lottieAnimation);
  7243.                       }
  7244.                       toRun = false;
  7245.                     }
  7246.                   } else if (INTERACTIVITY_BACKGROUND_ANIMATION === 2) {
  7247.                     if (this.useAnimationBackground === true) {
  7248.                       console.log('DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION', this.lottieAnimation);
  7249.                       this.useAnimationBackground = false;
  7250.                     }
  7251.                   }
  7252.                 }
  7253.                 if (toRun) {
  7254.                   return this.maybeLoadAnimationBackground77.apply(this, arguments);
  7255.                 }
  7256.               }
  7257.  
  7258.               console.log(`INTERACTIVITY_BACKGROUND_ANIMATION${INTERACTIVITY_BACKGROUND_ANIMATION} - OK`);
  7259.  
  7260.             } else {
  7261.               console.log(`INTERACTIVITY_BACKGROUND_ANIMATION${INTERACTIVITY_BACKGROUND_ANIMATION} - NG`);
  7262.  
  7263.             }
  7264.  
  7265.           })();
  7266.  
  7267.           console.log("[End]");
  7268.  
  7269.           console.groupEnd();
  7270.  
  7271.  
  7272.         }).catch(console.warn);
  7273.  
  7274.       }
  7275.  
  7276.  
  7277.     }
  7278.  
  7279.  
  7280.  
  7281.  
  7282.     promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  7283.  
  7284.     const fixJsonParse = () => {
  7285.  
  7286.  
  7287.  
  7288.       if (jsonParseFix && typeof JSON.parse === 'function' && !JSON.parse68) {
  7289.  
  7290.         let { _parse, _JSON } = jsonParseFix;
  7291.  
  7292.  
  7293.         let error = 0;
  7294.         try {
  7295.           _parse.apply(JSON, ["{}"])
  7296.           _JSON = JSON;
  7297.         } catch (e) {
  7298.           error = 1;
  7299.         }
  7300.         if (error === 1) {
  7301.  
  7302.           try {
  7303.             _parse.apply(_JSON, ["{}"])
  7304.           } catch (e) {
  7305.             error = 2;
  7306.           }
  7307.           if (error === 2) {
  7308.             return;
  7309.           }
  7310.         }
  7311.  
  7312.  
  7313.         JSON.parse68 = JSON.parse;
  7314.  
  7315.         JSON.parse = function parse(a, b) {
  7316.           const stack = (new Error()).stack;
  7317.           if (stack.includes('.readyStateChangeHandler_')) return _parse.apply(_JSON, arguments);
  7318.           return this.parse68(...arguments);
  7319.         };
  7320.  
  7321.         JSON.parse.toString = function () {
  7322.           return JSON.parse68.toString();
  7323.         };
  7324.  
  7325.         jsonParseFix = null;
  7326.  
  7327.       }
  7328.  
  7329.     }
  7330.  
  7331.     if (DE_JSONPRUNE_FOR_readyStateChangeHandler_) {
  7332.       promiseForCustomYtElementsReady.then(fixJsonParse);
  7333.       fixJsonParse();
  7334.     }
  7335.  
  7336.   });
  7337.  
  7338.  
  7339.  
  7340. })({ IntersectionObserver });