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YouTube 超快聊天

YouTube直播聊天的终极性能提升

当前为 2023-08-26 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.51.0
  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 = true;
  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 = true;
  148.  
  149.   const CHANGE_DATA_FLUSH_ASYNC = true;
  150.   const CHANGE_MANAGER_UNSUBSCRIBE = true;
  151.  
  152.   const DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION = true;
  153.  
  154.   const CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED = true;
  155.  
  156.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  157.   /*
  158.  
  159.     ### Time Approach
  160.  
  161.     // all below values can make the time interval > 250ms
  162.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  163.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  164.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  165.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  166.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  167.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  168.  
  169.     ### Pixel Check
  170.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  171.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  172.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  173.  
  174.     ### Example - totalDuration = 280000
  175.     totalDuration 280000
  176.     stepInterval 0.5
  177.     numOfSteps = Math.round(100 / stepInterval) = 200
  178.     time interval = 280000 / 200 = 1400ms <acceptable>
  179.  
  180.     ### Example - totalDuration = 18000
  181.     totalDuration 18000
  182.     stepInterval 5
  183.     numOfSteps = Math.round(100 / stepInterval) = 20
  184.     time interval = 18000 / 20 = 900ms <acceptable>
  185.  
  186.     ### Example - totalDuration = 5000
  187.     totalDuration 5000
  188.     stepInterval 5
  189.     numOfSteps = Math.round(100 / stepInterval) = 20
  190.     time interval = 5000 / 20 = 250ms <threshold value>
  191.  
  192.     ### Example - totalDuration = 3600
  193.     totalDuration 3600
  194.     stepInterval 5
  195.     numOfSteps = Math.round(100 / stepInterval) = 20
  196.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  197.  
  198.   */
  199.  
  200.   // =======================================================================================================
  201.  
  202.   // AUTOMAICALLY DETERMINED
  203.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  204.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  205.   const CHAT_MENU_SCROLL_UNLOCKING = CHAT_MENU_REFIT_ALONG_SCROLLING >= 1;
  206.   let runTickerClassName = 'run-ticker';
  207.  
  208.   const dummyImgURL = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
  209.   /*
  210.     WebP: data:image/webp;base64,UklGRjAB
  211.     PNG: data:image/png;base64,iVBORw0KGg==
  212.     JPEG: data:image/jpeg;base64,/9j/4AA=
  213.     GIF: data:image/gif;base64,R0lGODlhAQABAIA=
  214.     BMP: data:image/bmp;base64,Qk1oAAAA
  215.     SVG: data:image/svg+xml;base64,PHN2Zy8+Cg==
  216.  
  217.     WebP: data:image/webp;base64,AAAAAAA=
  218.     PNG:  data:image/png;base64,AAAAAAA=
  219.     JPEG: data:image/jpeg;base64,AAAAAAA=
  220.     GIF:  data:image/gif;base64,AAAAAAA=
  221.     BMP:  data:image/bmp;base64,AAAAAAA=
  222.  
  223.     data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
  224.  
  225.  
  226.   */
  227.  
  228.   // image sizing code
  229.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  230.  
  231.  
  232.   //   function KC(a, b, c, d) {
  233.   //     d = void 0 === d ? "width" : d;
  234.   //     if (!a || !a.length)
  235.   //         return null;
  236.   //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  237.   //         var e = window.devicePixelRatio;
  238.   //         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"));
  239.   //         HC = e
  240.   //     } else
  241.   //         HC || (HC = window.devicePixelRatio);
  242.   //     e = HC;
  243.   //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  244.   //     if (z("kevlar_tuner_min_thumbnail_quality"))
  245.   //         return a[0].url || null;
  246.   //     e = a.length;
  247.   //     if (z("kevlar_tuner_max_thumbnail_quality"))
  248.   //         return a[e - 1].url || null;
  249.   //     if (c)
  250.   //         for (var h = 0; h < e; h++)
  251.   //             if (0 <= a[h].url.indexOf(c))
  252.   //                 return a[h].url || null;
  253.   //     for (c = 0; c < e; c++)
  254.   //         if (a[c][d] >= b)
  255.   //             return a[c].url || null;
  256.   //     for (b = e - 1; 0 < b; b--)
  257.   //         if (a[b][d])
  258.   //             return a[b].url || null;
  259.   //     return a[0].url || null
  260.   // }
  261.  
  262.   const { IntersectionObserver } = __CONTEXT__;
  263.  
  264.   /** @type {globalThis.PromiseConstructor} */
  265.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  266.  
  267.   let jsonParseFix = null;
  268.  
  269.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.");
  270.   if (typeof WebAssembly !== 'object') return console.warn("Your browser is too old.\nPlease upgrade to the latest version."); // for passive and once
  271.  
  272.   // necessity of cssText3_smooth_transform_position to be checked.
  273.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  274.  
  275.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  276.         position: static !important;
  277.     }
  278.  
  279.   `: '';
  280.  
  281.   // fallback if dummy style fn fails
  282.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  283.  
  284.     /* optional */
  285.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  286.         height: auto !important;
  287.         min-height: unset !important;
  288.     }
  289.  
  290.     #items.style-scope.yt-live-chat-item-list-renderer {
  291.         transform: translateY(0px) !important;
  292.     }
  293.  
  294.     /* optional */
  295.  
  296.   `: '';
  297.  
  298.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  299.  
  300.     /* ------------------------------------------------------------------------------------------------------------- */
  301.  
  302.     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 {
  303.         contain: layout style;
  304.     }
  305.  
  306.     #items.style-scope.yt-live-chat-item-list-renderer {
  307.         contain: layout paint style;
  308.     }
  309.  
  310.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  311.         contain: style;
  312.     }
  313.  
  314.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  315.         contain: size style;
  316.     }
  317.  
  318.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  319.         contain: size layout paint style;
  320.     }
  321.  
  322.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  323.         contain: layout paint style;
  324.     }
  325.  
  326.     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 {
  327.         contain: layout style;
  328.     }
  329.  
  330.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  331.         contain: layout paint style;
  332.     }
  333.  
  334.     /* ------------------------------------------------------------------------------------------------------------- */
  335.  
  336.   ` : '';
  337.  
  338.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  339.  
  340.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  341.         top: 4px;
  342.         transition-property: top;
  343.         bottom: unset;
  344.     }
  345.  
  346.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  347.         top: -42px;
  348.     }
  349.  
  350.   `: '';
  351.  
  352.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  353.  
  354.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  355.         contain: layout style;
  356.     }
  357.  
  358.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  359.         overflow: visible;
  360.     }
  361.  
  362.   `: '';
  363.  
  364.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  365.  
  366.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  367.         --yt-live-chat-action-panel-top-border: none;
  368.     }
  369.  
  370.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  371.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  372.     }
  373.  
  374.     html #panel-pages.yt-live-chat-renderer {
  375.         border-top: 0;
  376.         border-bottom: 0;
  377.     }
  378.  
  379.   `: '';
  380.  
  381.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  382.  
  383.     img,
  384.     yt-img-shadow[height][width],
  385.     yt-img-shadow {
  386.         content-visibility: visible !important;
  387.     }
  388.  
  389.   `  : '';
  390.  
  391.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  392.  
  393.     /* remove YouTube constant will-change */
  394.     /* constant value will slow down the performance; default auto */
  395.  
  396.     /* www-player.css */
  397.     html .ytp-contextmenu,
  398.     html .ytp-settings-menu {
  399.         will-change: unset;
  400.     }
  401.  
  402.     /* frequently matched elements */
  403.     html .fill.yt-interaction,
  404.     html .stroke.yt-interaction,
  405.     html .yt-spec-touch-feedback-shape__fill,
  406.     html .yt-spec-touch-feedback-shape__stroke {
  407.         will-change: unset;
  408.     }
  409.  
  410.     /* live_chat_polymer.js */
  411.     /*
  412.     html .toggle-button.tp-yt-paper-toggle-button,
  413.     html #primaryProgress.tp-yt-paper-progress,
  414.     html #secondaryProgress.tp-yt-paper-progress,
  415.     html #onRadio.tp-yt-paper-radio-button,
  416.     html .fill.yt-interaction,
  417.     html .stroke.yt-interaction,
  418.     html .yt-spec-touch-feedback-shape__fill,
  419.     html .yt-spec-touch-feedback-shape__stroke {
  420.         will-change: unset;
  421.     }
  422.     */
  423.  
  424.     /* desktop_polymer_enable_wil_icons.js */
  425.     /* html .fill.yt-interaction,
  426.     html .stroke.yt-interaction, */
  427.     html tp-yt-app-header::before,
  428.     html tp-yt-iron-list,
  429.     html #items.tp-yt-iron-list > *,
  430.     html #onRadio.tp-yt-paper-radio-button,
  431.     html .toggle-button.tp-yt-paper-toggle-button,
  432.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  433.     html #items.ytd-post-multi-image-renderer,
  434.     html #items.ytd-horizontal-card-list-renderer,
  435.     html #items.yt-horizontal-list-renderer,
  436.     html #left-arrow.yt-horizontal-list-renderer,
  437.     html #right-arrow.yt-horizontal-list-renderer,
  438.     html #items.ytd-video-description-infocards-section-renderer,
  439.     html #items.ytd-video-description-music-section-renderer,
  440.     html #chips.ytd-feed-filter-chip-bar-renderer,
  441.     html #chips.yt-chip-cloud-renderer,
  442.     html #items.ytd-merch-shelf-renderer,
  443.     html #items.ytd-product-details-image-carousel-renderer,
  444.     html ytd-video-preview,
  445.     html #player-container.ytd-video-preview,
  446.     html #primaryProgress.tp-yt-paper-progress,
  447.     html #secondaryProgress.tp-yt-paper-progress,
  448.     html ytd-miniplayer[enabled] /* ,
  449.     html .yt-spec-touch-feedback-shape__fill,
  450.     html .yt-spec-touch-feedback-shape__stroke */ {
  451.         will-change: unset;
  452.     }
  453.  
  454.     /* other */
  455.     .ytp-videowall-still-info-content[class],
  456.     .ytp-suggestion-image[class] {
  457.         will-change: unset !important;
  458.     }
  459.  
  460.   ` : '';
  461.  
  462.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  463.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  464.  
  465.     elzm-fonts {
  466.         visibility: collapse;
  467.         position: fixed;
  468.         top: -10px;
  469.         left: -10px;
  470.         font-size: 10pt;
  471.         line-height: 100%;
  472.         width: 100px;
  473.         height: 100px;
  474.         transform: scale(0.1);
  475.         transform: scale(0.01);
  476.         transform: scale(0.001);
  477.         transform-origin: 0 0;
  478.         contain: strict;
  479.         display: block;
  480.  
  481.         pointer-events: none !important;
  482.         user-select: none !important;
  483.     }
  484.  
  485.     elzm-fonts[id]#elzm-fonts-yk75g {
  486.         user-select: none !important;
  487.         pointer-events: none !important;
  488.     }
  489.  
  490.     elzm-font {
  491.         visibility: collapse;
  492.         position: absolute;
  493.         line-height: 100%;
  494.         width: 100px;
  495.         height: 100px;
  496.         contain: strict;
  497.         display: block;
  498.  
  499.         user-select: none !important;
  500.         pointer-events: none !important;
  501.     }
  502.  
  503.     elzm-font::before {
  504.         visibility: collapse;
  505.         position: absolute;
  506.         line-height: 100%;
  507.         width: 100px;
  508.         height: 100px;
  509.         contain: strict;
  510.         display: block;
  511.  
  512.         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';
  513.  
  514.         user-select: none !important;
  515.         pointer-events: none !important;
  516.     }
  517.  
  518.   `: '';
  519.  
  520.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  521.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  522.         -webkit-backdrop-filter: none;
  523.         backdrop-filter: none;
  524.     }
  525.   `: '';
  526.  
  527.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  528.  
  529.     @keyframes blinker-miuzp {
  530.         0%, 60%, 100% {
  531.             opacity: 1;
  532.         }
  533.         30% {
  534.             opacity: 0.6;
  535.         }
  536.     }
  537.  
  538.     yt-icon-button#show-more.has-new-messages-miuzp {
  539.         animation: blinker-miuzp 1.74s linear infinite;
  540.     }
  541.  
  542.   `: '';
  543.  
  544.  
  545.   const addCss = () => `
  546.  
  547.   @property --ticker-rtime {
  548.     syntax: "<percentage>";
  549.     inherits: false;
  550.     initial-value: 0%;
  551.   }
  552.  
  553.   /*
  554.   .run-ticker {
  555.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  556.   }
  557.  
  558.   .run-ticker-test {
  559.     background: #00000001;
  560.   }
  561.  
  562.   .run-ticker-forced,
  563.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  564.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  565.   {
  566.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  567.   }
  568.   */
  569.  
  570.   .run-ticker {
  571.     --ticker-bg:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  572.   }
  573.  
  574.   .run-ticker,
  575.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  576.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  577.   {
  578.     background: var(--ticker-bg) !important;
  579.   }
  580.  
  581.   yt-live-chat-ticker-dummy777-item-renderer {
  582.     background: #00000001;
  583.   }
  584.  
  585.   yt-live-chat-ticker-dummy777-item-renderer[dummy777] {
  586.     position: fixed !important;
  587.     top: -1000px !important;
  588.     left: -1000px !important;
  589.     font-size: 1px !important;
  590.     color: transparent !important;
  591.     pointer-events: none !important;
  592.     z-index: -1 !important;
  593.     contain: strict !important;
  594.     box-sizing: border-box !important;
  595.     pointer-events: none !important;
  596.     user-select: none !important;
  597.     max-width: 1px !important;
  598.     max-height: 1px !important;
  599.     overflow: hidden !important;
  600.     visibility: collapse !important;
  601.     display: none !important;
  602.   }
  603.  
  604.   yt-live-chat-ticker-dummy777-item-renderer #container {
  605.     background: inherit;
  606.   }
  607.  
  608.  
  609.   ${cssText8_fonts_pre_render}
  610.  
  611.   ${cssText9_no_backdrop_filter_when_menu_shown}
  612.  
  613.   @supports (contain: layout paint style) {
  614.  
  615.     ${cssText5}
  616.  
  617.   }
  618.  
  619.   @supports (color: var(--general)) {
  620.  
  621.     html {
  622.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  623.     }
  624.  
  625.     ${cssText3_smooth_transform_position}
  626.  
  627.     ${cssText7c_will_change_unset}
  628.  
  629.     ${cssText7b_content_visibility_unset}
  630.  
  631.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  632.         overflow-y: scroll;
  633.         padding-right: 0;
  634.     }
  635.  
  636.     ${cssText4_smooth_transform_forced_props}
  637.  
  638.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  639.         pointer-events: none !important;
  640.     }
  641.  
  642.     #continuations, #continuations * {
  643.         contain: strict;
  644.         position: fixed;
  645.         top: 2px;
  646.         height: 1px;
  647.         width: 2px;
  648.         height: 1px;
  649.         visibility: collapse;
  650.     }
  651.  
  652.     ${cssText6b_show_more_button}
  653.  
  654.     ${cssText6d_input_panel_border}
  655.  
  656.     ${cssText6c_input_panel_overflow}
  657.  
  658.   }
  659.  
  660.  
  661.   @supports (overflow-anchor: auto) {
  662.  
  663.     .no-anchor * {
  664.         overflow-anchor: none;
  665.     }
  666.     .no-anchor > item-anchor {
  667.         overflow-anchor: auto;
  668.     }
  669.  
  670.     item-anchor {
  671.  
  672.         height:1px;
  673.         width: 100%;
  674.         transform: scaleY(0.00001);
  675.         transform-origin:0 0;
  676.         contain: strict;
  677.         opacity:0;
  678.         display:flex;
  679.         position:relative;
  680.         flex-shrink:0;
  681.         flex-grow:0;
  682.         margin-bottom:0;
  683.         overflow:hidden;
  684.         box-sizing:border-box;
  685.         visibility: visible;
  686.         content-visibility: visible;
  687.         contain-intrinsic-size: auto 1px;
  688.         pointer-events:none !important;
  689.  
  690.     }
  691.  
  692.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  693.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  694.     }
  695.  
  696.     html item-anchor {
  697.  
  698.         height: 1px;
  699.         width: 1px;
  700.         top: auto;
  701.         left: auto;
  702.         right: auto;
  703.         bottom: auto;
  704.         transform: translateY(-1px);
  705.         position: absolute;
  706.         z-index: -1;
  707.  
  708.     }
  709.  
  710.   }
  711.  
  712.   @supports (color: var(--pre-rendering)) {
  713.  
  714.     @keyframes dontRenderAnimation {
  715.         0% {
  716.             background-position-x: 3px;
  717.         }
  718.         100% {
  719.             background-position-x: 4px;
  720.         }
  721.     }
  722.  
  723.     .dont-render[class] {
  724.         /* visibility: collapse !important; */
  725.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  726.  
  727.         transform: scale(0.01) !important;
  728.         transform: scale(0.00001) !important;
  729.         transform: scale(0.0000001) !important;
  730.         transform-origin: 0 0 !important;
  731.         z-index: -1 !important;
  732.         contain: strict !important;
  733.         box-sizing: border-box !important;
  734.  
  735.         height: 1px !important;
  736.         height: 0.1px !important;
  737.         height: 0.01px !important;
  738.         height: 0.0001px !important;
  739.         height: 0.000001px !important;
  740.  
  741.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  742.  
  743.         pointer-events: none !important;
  744.         user-select: none !important;
  745.  
  746.     }
  747.  
  748.     #sk35z {
  749.       display: block !important;
  750.  
  751.       visibility: collapse !important;
  752.  
  753.       transform: scale(0.01) !important;
  754.       transform: scale(0.00001) !important;
  755.       transform: scale(0.0000001) !important;
  756.       transform-origin: 0 0 !important;
  757.       z-index: -1 !important;
  758.       contain: strict !important;
  759.       box-sizing: border-box !important;
  760.  
  761.       height: 1px !important;
  762.       height: 0.1px !important;
  763.       height: 0.01px !important;
  764.       height: 0.0001px !important;
  765.       height: 0.000001px !important;
  766.  
  767.       position: absolute !important;
  768.       top: -1000px !important;
  769.       left: -1000px !important;
  770.  
  771.     }
  772.  
  773.   }
  774.  
  775.   [rNgzQ] {
  776.     opacity: 0.1 !important;
  777.     opacity: 0.01 !important;
  778.     opacity: 0.001 !important;
  779.     opacity: 0.0001 !important;
  780.     opacity: 0.00001 !important;
  781.     opacity: 0.00000001 !important;
  782.  
  783.     pointer-events: none !important;
  784.   }
  785.  
  786.   ${cssText10_show_more_blinker}
  787.  
  788.   `;
  789.  
  790.  
  791.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  792.  
  793.   // Create a unique key for the script and check if it is already running
  794.   const hkey_script = 'mchbwnoasqph';
  795.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  796.   win[hkey_script] = true;
  797.  
  798.   if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  799.  
  800.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  801.     if (te4 < 3) {
  802.       setTimeout(() => { });
  803.       setTimeout(() => { });
  804.     }
  805.  
  806.   }
  807.  
  808.   class Mutex {
  809.  
  810.     constructor() {
  811.       this.p = Promise.resolve()
  812.     }
  813.  
  814.     /**
  815.      *  @param {(lockResolve: () => void)} f
  816.      */
  817.     lockWith(f) {
  818.       this.p = this.p.then(() => new Promise(f).catch(console.warn))
  819.     }
  820.  
  821.   }
  822.  
  823.   function dr(s) {
  824.     // reserved for future use
  825.     return s;
  826.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  827.   }
  828.  
  829.   const getProto = (element) => {
  830.     if (element) {
  831.       const cnt = element.inst || element;
  832.       return cnt.constructor.prototype || null;
  833.     }
  834.     return null;
  835.   }
  836.  
  837.   const assertor = (f) => f() || console.assert(false, f + "");
  838.  
  839.   const fnIntegrity = (f, d) => {
  840.     if (!f || typeof f !== 'function') {
  841.       console.warn('f is not a function', f);
  842.       return;
  843.     }
  844.     let p = f + "", s = 0, j = -1, w = 0;
  845.     for (let i = 0, l = p.length; i < l; i++) {
  846.       const t = p[i];
  847.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  848.         if (j < i - 1) w++;
  849.         j = i;
  850.       } else {
  851.         s++;
  852.       }
  853.     }
  854.     let itz = `${f.length}.${s}.${w}`;
  855.     if (!d) {
  856.       return itz;
  857.     } else {
  858.       return itz === d;
  859.     }
  860.   }
  861.  
  862.  
  863.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  864.  
  865.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  866.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  867.   if (!isContainSupport) {
  868.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  869.   } else {
  870.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  871.   }
  872.  
  873.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  874.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  875.   if (!isOverflowAnchorSupport) {
  876.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  877.   } else {
  878.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  879.   }
  880.  
  881.   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.
  882.  
  883.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  884.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  885.  
  886.   let hasTimerModified = null;
  887.   const DO_CHECK_TICKER_BACKGROUND_OVERRIDED = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND || ENABLE_RAF_HACK_TICKERS;
  888.  
  889.   const fxOperator = (proto, propertyName) => {
  890.     let propertyDescriptorGetter = null;
  891.     try {
  892.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  893.     } catch (e) { }
  894.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  895.       try {
  896.  
  897.         return propertyDescriptorGetter.call(dr(e));
  898.       } catch (e) { }
  899.       return e[propertyName];
  900.     } : (e) => e[propertyName];
  901.   };
  902.  
  903.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  904.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  905.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  906.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  907.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  908.  
  909.   const groupCollapsed = (text1, text2) => {
  910.  
  911.     console.groupCollapsed(`%c${text1}%c${text2}`,
  912.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  913.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  914.     );
  915.   }
  916.  
  917.  
  918.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  919.   const onRegistryReady = (callback) => {
  920.     if (typeof customElements === 'undefined') {
  921.       if (!('__CE_registry' in document)) {
  922.         // https://github.com/webcomponents/polyfills/
  923.         Object.defineProperty(document, '__CE_registry', {
  924.           get() {
  925.             // return undefined
  926.           },
  927.           set(nv) {
  928.             if (typeof nv == 'object') {
  929.               delete this.__CE_registry;
  930.               this.__CE_registry = nv;
  931.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  932.             }
  933.             return true;
  934.           },
  935.           enumerable: false,
  936.           configurable: true
  937.         })
  938.       }
  939.       let eventHandler = (evt) => {
  940.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  941.         const f = callback;
  942.         callback = null;
  943.         eventHandler = null;
  944.         f();
  945.       };
  946.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  947.     } else {
  948.       callback();
  949.     }
  950.   };
  951.  
  952.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  953.  
  954.   const renderReadyPn = typeof ResizeObserver !== 'undefined' ? (sizingTarget) => {
  955.  
  956.     return new Promise(resolve => {
  957.  
  958.       let ro = new ResizeObserver(entries => {
  959.         if (entries && entries.length >= 1) {
  960.           resolve();
  961.           ro.disconnect();
  962.           ro = null;
  963.         }
  964.       });
  965.       ro.observe(sizingTarget);
  966.  
  967.  
  968.  
  969.     });
  970.  
  971.   } : (sizingTarget) => {
  972.  
  973.  
  974.     return new Promise(resolve => {
  975.  
  976.       let io = new IntersectionObserver(entries => {
  977.         if (entries && entries.length >= 1) {
  978.           resolve();
  979.           io.disconnect();
  980.           io = null;
  981.         }
  982.       });
  983.       io.observe(sizingTarget);
  984.  
  985.  
  986.  
  987.     });
  988.  
  989.   };
  990.  
  991.   /* globals WeakRef:false */
  992.  
  993.   /** @type {(o: Object | null) => WeakRef | null} */
  994.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  995.  
  996.   /** @type {(wr: Object | null) => Object | null} */
  997.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  998.  
  999.   const { addCssManaged } = (() => {
  1000.  
  1001.     const addFontPreRendering = () => {
  1002.  
  1003.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  1004.  
  1005.       let efsContainer = document.createElement('elzm-fonts');
  1006.       efsContainer.id = 'elzm-fonts-yk75g'
  1007.  
  1008.       const arr = [];
  1009.       let p = document.createElement('elzm-font');
  1010.       arr.push(p);
  1011.  
  1012.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  1013.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1014.  
  1015.           p = document.createElement('elzm-font');
  1016.           p.style.fontWeight = size;
  1017.           arr.push(p);
  1018.         }
  1019.       }
  1020.  
  1021.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  1022.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1023.  
  1024.           p = document.createElement('elzm-font');
  1025.           p.style.fontFamily = 'Roboto';
  1026.           p.style.fontWeight = size;
  1027.           arr.push(p);
  1028.         }
  1029.       }
  1030.  
  1031.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  1032.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1033.  
  1034.           p = document.createElement('elzm-font');
  1035.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  1036.           p.style.fontWeight = size;
  1037.           arr.push(p);
  1038.         }
  1039.       }
  1040.  
  1041.  
  1042.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  1043.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1044.  
  1045.           p = document.createElement('elzm-font');
  1046.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  1047.           p.style.fontWeight = size;
  1048.           arr.push(p);
  1049.         }
  1050.       }
  1051.  
  1052.  
  1053.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  1054.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1055.  
  1056.           p = document.createElement('elzm-font');
  1057.           p.style.fontFamily = 'sans-serif';
  1058.           p.style.fontWeight = size;
  1059.           arr.push(p);
  1060.         }
  1061.       }
  1062.  
  1063.       console.log('number of elzm-font elements', arr.length);
  1064.  
  1065.       HTMLElement.prototype.append.apply(efsContainer, arr);
  1066.  
  1067.       (document.body || document.documentElement).appendChild(efsContainer);
  1068.  
  1069.  
  1070.       console.log('elzm-font elements have been added to the page for rendering.');
  1071.  
  1072.       console.groupEnd();
  1073.  
  1074.     }
  1075.  
  1076.     let isCssAdded = false;
  1077.  
  1078.     function addCssElement() {
  1079.       let s = document.createElement('style');
  1080.       s.id = 'ewRvC';
  1081.       return s;
  1082.     }
  1083.  
  1084.     const addCssManaged = () => {
  1085.       if (!isCssAdded && document.documentElement && document.head) {
  1086.         isCssAdded = true;
  1087.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  1088.         if (ENABLE_FONT_PRE_RENDERING) {
  1089.           Promise.resolve().then(addFontPreRendering)
  1090.         }
  1091.       }
  1092.     }
  1093.  
  1094.     return { addCssManaged };
  1095.   })();
  1096.  
  1097.  
  1098.   const { setupStyle } = (() => {
  1099.  
  1100.     const sp7 = Symbol();
  1101.  
  1102.     const proxyHelperFn = (dummy) => ({
  1103.  
  1104.       get(target, prop) {
  1105.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  1106.       },
  1107.       set(target, prop, value) {
  1108.         if (!(prop in dummy)) {
  1109.           target[prop] = value;
  1110.         }
  1111.         return true;
  1112.       },
  1113.       has(target, prop) {
  1114.         return (prop in target);
  1115.       },
  1116.       deleteProperty(target, prop) {
  1117.         return true;
  1118.       },
  1119.       ownKeys(target) {
  1120.         return Object.keys(target);
  1121.       },
  1122.       defineProperty(target, key, descriptor) {
  1123.         return Object.defineProperty(target, key, descriptor);
  1124.       },
  1125.       getOwnPropertyDescriptor(target, key) {
  1126.         return Object.getOwnPropertyDescriptor(target, key);
  1127.       },
  1128.  
  1129.     });
  1130.  
  1131.     const setupStyle = (m1, m2) => {
  1132.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  1133.  
  1134.       const dummy1v = {
  1135.         transform: '',
  1136.         height: '',
  1137.         minHeight: '',
  1138.         paddingBottom: '',
  1139.         paddingTop: ''
  1140.       };
  1141.  
  1142.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  1143.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  1144.         dummy1v[k] = dummyStyleFn(k);
  1145.       }
  1146.  
  1147.       const dummy1p = proxyHelperFn(dummy1v);
  1148.       const sp1v = new Proxy(m1.style, dummy1p);
  1149.       const sp2v = new Proxy(m2.style, dummy1p);
  1150.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  1151.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  1152.       m1.removeAttribute("style");
  1153.       m2.removeAttribute("style");
  1154.  
  1155.     }
  1156.  
  1157.     return { setupStyle };
  1158.  
  1159.   })();
  1160.  
  1161.  
  1162.  
  1163.   function setThumbnails(config) {
  1164.  
  1165.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1166.  
  1167.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1168.  
  1169.  
  1170.       if (thumbnails && thumbnails.length > 0) {
  1171.         if (flag0 > 0 && thumbnails.length > 1) {
  1172.           let pSize = 0;
  1173.           let newThumbnails = [];
  1174.           for (const thumbnail of thumbnails) {
  1175.             if (!thumbnail || !thumbnail.url) continue;
  1176.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1177.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1178.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1179.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1180.               newThumbnails.push(thumbnail);
  1181.               if (imageLinks) imageLinks.add(thumbnail.url);
  1182.             }
  1183.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1184.               pSize = thumbnail.width;
  1185.             }
  1186.           }
  1187.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1188.             baseObject.thumbnails = newThumbnails;
  1189.           } else {
  1190.             newThumbnails.length = 0;
  1191.           }
  1192.           newThumbnails = null;
  1193.         } else {
  1194.           for (const thumbnail of thumbnails) {
  1195.             if (thumbnail && thumbnail.url) {
  1196.               if (imageLinks) imageLinks.add(thumbnail.url);
  1197.             }
  1198.           }
  1199.         }
  1200.       }
  1201.  
  1202.     }
  1203.   }
  1204.  
  1205.   function fixLiveChatItem(item, imageLinks) {
  1206.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1207.     if (liveChatTextMessageRenderer) {
  1208.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1209.       if (messageRuns && messageRuns.length > 0) {
  1210.         for (const run of messageRuns) {
  1211.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1212.           setThumbnails({
  1213.             baseObject: emojiImage,
  1214.             thumbnails: emojiImage.thumbnails,
  1215.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1216.             imageLinks
  1217.           });
  1218.         }
  1219.       }
  1220.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1221.       setThumbnails({
  1222.         baseObject: authorPhoto,
  1223.         thumbnails: authorPhoto.thumbnails,
  1224.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1225.         imageLinks
  1226.       });
  1227.     }
  1228.   }
  1229.  
  1230.  
  1231.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1232.  
  1233.     const flags = () => {
  1234.       try {
  1235.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1236.       } catch (e) { }
  1237.       return null;
  1238.     };
  1239.  
  1240.     const flagsForced = () => {
  1241.       try {
  1242.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1243.       } catch (e) { }
  1244.       return null;
  1245.     };
  1246.  
  1247.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1248.  
  1249.       if (!EXPERIMENT_FLAGS) return;
  1250.  
  1251.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1252.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1253.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1254.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1255.         }
  1256.       }
  1257.  
  1258.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1259.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1260.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1261.       }
  1262.  
  1263.     };
  1264.  
  1265.     const uf = (EXPERIMENT_FLAGS) => {
  1266.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1267.       if (EXPERIMENT_FLAGS) {
  1268.         flagsFn(EXPERIMENT_FLAGS);
  1269.         flagsFn(flagsForced());
  1270.       }
  1271.     }
  1272.  
  1273.     uf();
  1274.  
  1275.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1276.  
  1277.       uf();
  1278.       let cidFlags = 0;
  1279.       let kd = 0;
  1280.       new Promise(flagResolve => {
  1281.  
  1282.         const flagTimer = () => {
  1283.           const EXPERIMENT_FLAGS = flags();
  1284.           if (!EXPERIMENT_FLAGS) return;
  1285.           uf(EXPERIMENT_FLAGS);
  1286.           if (kd > 0) return;
  1287.           kd = 1;
  1288.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1289.           const moDeferred = new Promise(resolve => {
  1290.             let mo = new MutationObserver(() => {
  1291.               if (mo) {
  1292.                 mo.disconnect();
  1293.                 mo.takeRecords();
  1294.                 mo = null;
  1295.                 resolve();
  1296.               }
  1297.             });
  1298.             mo.observe(document, { subtree: true, childList: true });
  1299.           });
  1300.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1301.         };
  1302.  
  1303.         uf();
  1304.         cidFlags = setInterval(flagTimer, 1);
  1305.       }).then(() => {
  1306.         if (cidFlags > 0) clearInterval(cidFlags);
  1307.         cidFlags = 0;
  1308.         uf();
  1309.       });
  1310.  
  1311.     }
  1312.  
  1313.     return flagsFnOnInterval;
  1314.  
  1315.   })() : null;
  1316.  
  1317.   let kptPF = null;
  1318.   const emojiPrefetched = new Set();
  1319.   const authorPhotoPrefetched = new Set();
  1320.  
  1321.   function linker(link, rel, href, _as) {
  1322.     return new Promise(resolve => {
  1323.       if (!link) link = document.createElement('link');
  1324.       link.rel = rel;
  1325.       if (_as) link.setAttribute('as', _as);
  1326.       link.onload = function () {
  1327.         resolve({
  1328.           link: this,
  1329.           success: true
  1330.         })
  1331.         this.remove();
  1332.       };
  1333.       link.onerror = function () {
  1334.         resolve({
  1335.           link: this,
  1336.           success: false
  1337.         });
  1338.         this.remove();
  1339.       };
  1340.       link.href = href;
  1341.       document.head.appendChild(link);
  1342.       link = null;
  1343.     });
  1344.   }
  1345.  
  1346.  
  1347.  
  1348.   const cleanContext = async (win) => {
  1349.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1350.     try {
  1351.       let mx = 16; // MAX TRIAL
  1352.       const frameId = 'vanillajs-iframe-v1';
  1353.       /** @type {HTMLIFrameElement | null} */
  1354.       let frame = document.getElementById(frameId);
  1355.       let removeIframeFn = null;
  1356.       if (!frame) {
  1357.         frame = document.createElement('iframe');
  1358.         frame.id = 'vanillajs-iframe-v1';
  1359.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1360.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1361.         n.appendChild(frame);
  1362.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1363.         const root = document.documentElement;
  1364.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1365.         removeIframeFn = (setTimeout) => {
  1366.           const removeIframeOnDocumentReady = (e) => {
  1367.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1368.             win = null;
  1369.             setTimeout(() => {
  1370.               n.remove();
  1371.               n = null;
  1372.             }, 200);
  1373.           }
  1374.           if (document.readyState !== 'loading') {
  1375.             removeIframeOnDocumentReady();
  1376.           } else {
  1377.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1378.           }
  1379.         }
  1380.       }
  1381.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1382.       const fc = frame.contentWindow;
  1383.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1384.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  1385.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  1386.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1387.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1388.       res.animate = HTMLElement.prototype.animate;
  1389.       jsonParseFix = {
  1390.         _JSON: fc.JSON, _parse: fc.JSON.parse
  1391.       }
  1392.       return res;
  1393.     } catch (e) {
  1394.       console.warn(e);
  1395.       return null;
  1396.     }
  1397.   };
  1398.  
  1399.   cleanContext(win).then(__CONTEXT__ => {
  1400.     if (!__CONTEXT__) return null;
  1401.  
  1402.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate } = __CONTEXT__;
  1403.  
  1404.  
  1405.  
  1406.     let foregroundPromiseForLiveChatFlush = null;
  1407.  
  1408.     const getForegroundPromiseForLiveChatFlush = () => {
  1409.       if (document.visibilityState === 'visible') return Promise.resolve();
  1410.       else {
  1411.         return (foregroundPromiseForLiveChatFlush = (foregroundPromiseForLiveChatFlush || new Promise(resolve => {
  1412.           requestAnimationFrame(() => {
  1413.             foregroundPromiseForLiveChatFlush = null;
  1414.             resolve();
  1415.           });
  1416.         })));
  1417.       }
  1418.     }
  1419.  
  1420.     let aeConstructor = null;
  1421.  
  1422.     // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  1423.     let pairForPauseResume = 0; // each increasion = number of ticker
  1424.     let pairForPauseResumeM = 0;
  1425.     // << end >>
  1426.  
  1427.     // << __openedChanged82 >>
  1428.     let currentMenuPivotWR = null;
  1429.  
  1430.     // << if DO_PARTICIPANT_LIST_HACKS >>
  1431.     const beforeParticipantsMap = new WeakMap();
  1432.     // << end >>
  1433.  
  1434.  
  1435.  
  1436.     // << if onRegistryReadyForDOMOperations >>
  1437.  
  1438.     let dt0 = Date.now() - 2000;
  1439.     const dateNow = () => Date.now() - dt0;
  1440.     // let lastScroll = 0;
  1441.     // let lastLShow = 0;
  1442.     let lastWheel = 0;
  1443.     let lastMouseDown = 0;
  1444.     let lastMouseUp = 0;
  1445.     let currentMouseDown = false;
  1446.     let lastTouchDown = 0;
  1447.     let lastTouchUp = 0;
  1448.     let currentTouchDown = false;
  1449.     let lastUserInteraction = 0;
  1450.  
  1451.     let scrollChatFn = null;
  1452.  
  1453.     let skipDontRender = true; // true first; false by flushActiveItems_
  1454.     let allowDontRender = null;
  1455.  
  1456.     // ---- #items mutation ----
  1457.     let sk35zResolveFn = null;
  1458.     let firstList = true;
  1459.  
  1460.     // << end >>
  1461.  
  1462.     class RAFHub {
  1463.       constructor() {
  1464.         /** @type {number} */
  1465.         this.startAt = 8170;
  1466.         /** @type {number} */
  1467.         this.counter = 0;
  1468.         /** @type {number} */
  1469.         this.rid = 0;
  1470.         /** @type {Map<number, FrameRequestCallback>} */
  1471.         this.funcs = new Map();
  1472.         const funcs = this.funcs;
  1473.         /** @type {FrameRequestCallback} */
  1474.         this.bCallback = this.mCallback.bind(this);
  1475.         this.pClear = () => funcs.clear();
  1476.         this.keepRAF = false;
  1477.       }
  1478.       /** @param {DOMHighResTimeStamp} highResTime */
  1479.       mCallback(highResTime) {
  1480.         this.rid = 0;
  1481.         Promise.resolve().then(this.pClear);
  1482.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  1483.       }
  1484.       /** @param {FrameRequestCallback} f */
  1485.       request(f) {
  1486.         if (this.counter > 1e9) this.counter = 9;
  1487.         let cid = this.startAt + (++this.counter);
  1488.         this.funcs.set(cid, f);
  1489.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  1490.         return cid;
  1491.       }
  1492.       /** @param {number} cid */
  1493.       cancel(cid) {
  1494.         cid = +cid;
  1495.         if (cid > 0) {
  1496.           if (cid <= this.startAt) {
  1497.             return cancelAnimationFrame(cid);
  1498.           }
  1499.           if (this.rid > 0) {
  1500.             this.funcs.delete(cid);
  1501.             if (this.funcs.size === 0 && !this.keepRAF) {
  1502.               cancelAnimationFrame(this.rid);
  1503.               this.rid = 0;
  1504.             }
  1505.           }
  1506.         }
  1507.       }
  1508.     }
  1509.  
  1510.     function basePrefetching() {
  1511.  
  1512.       new Promise(resolve => {
  1513.  
  1514.         if (document.readyState !== 'loading') {
  1515.           resolve();
  1516.         } else {
  1517.           win.addEventListener("DOMContentLoaded", resolve, false);
  1518.         }
  1519.  
  1520.       }).then(() => {
  1521.         const hostL1 = [
  1522.           'https://www.youtube.com', 'https://googlevideo.com',
  1523.           'https://googleapis.com', 'https://accounts.youtube.com',
  1524.           'https://www.gstatic.com', 'https://ggpht.com',
  1525.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1526.         ];
  1527.  
  1528.         const hostL2 = [
  1529.           'https://youtube.com',
  1530.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1531.         ];
  1532.  
  1533.         let link = null;
  1534.  
  1535.         function kn() {
  1536.  
  1537.           link = document.createElement('link');
  1538.           if (link.relList && link.relList.supports) {
  1539.             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)
  1540.           } else {
  1541.             kptPF = 0;
  1542.           }
  1543.  
  1544.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1545.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1546.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1547.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1548.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1549.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1550.           console.groupEnd();
  1551.  
  1552.         }
  1553.  
  1554.         for (const h of hostL1) {
  1555.  
  1556.           if (kptPF === null) kn();
  1557.           if (ENABLE_BASE_PREFETCHING) {
  1558.             // if (kptPF & 1) {
  1559.             //   linker(link, 'dns-prefetch', h);
  1560.             //   link = null;
  1561.             // }
  1562.             if (kptPF & 2) {
  1563.               linker(link, 'preconnect', h);
  1564.               link = null;
  1565.             }
  1566.           }
  1567.         }
  1568.  
  1569.         for (const h of hostL2) {
  1570.           if (kptPF === null) kn();
  1571.           if (ENABLE_BASE_PREFETCHING) {
  1572.             if (kptPF & 1) {
  1573.               linker(link, 'dns-prefetch', h);
  1574.               link = null;
  1575.             }
  1576.           }
  1577.         }
  1578.  
  1579.       })
  1580.  
  1581.  
  1582.     }
  1583.  
  1584.     if (flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1585.  
  1586.     if (DO_LINK_PREFETCH) basePrefetching();
  1587.  
  1588.     const { notifyPath7081 } = (() => {
  1589.       // DO_PARTICIPANT_LIST_HACKS
  1590.  
  1591.       const mutexParticipants = new Mutex();
  1592.  
  1593.       let uvid = 0;
  1594.       let r95dm = 0;
  1595.       let c95dm = -1;
  1596.  
  1597.       const foundMap = (base, content) => {
  1598.         /*
  1599.           let lastSearch = 0;
  1600.           let founds = base.map(baseEntry => {
  1601.             let search = content.indexOf(baseEntry, lastSearch);
  1602.             if (search < 0) return false;
  1603.             lastSearch = search + 1;
  1604.             return true;
  1605.           });
  1606.           return founds;
  1607.         */
  1608.         const contentSet = new Set(content);
  1609.         return base.map(baseEntry => contentSet.has(baseEntry));
  1610.  
  1611.       }
  1612.  
  1613.  
  1614.  
  1615.       const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1616.  
  1617.         const handler1 = {
  1618.           get(target, prop, receiver) {
  1619.             if (prop === 'object') {
  1620.               return participants; // avoid memory leakage
  1621.             }
  1622.             if (prop === 'type') {
  1623.               return 'splice';
  1624.             }
  1625.             return target[prop];
  1626.           }
  1627.         };
  1628.         const releaser = () => {
  1629.           participants = null;
  1630.         }
  1631.  
  1632.         let foundsForAfter = foundMap(idsAfter, idsBefore);
  1633.         let foundsForBefore = foundMap(idsBefore, idsAfter);
  1634.  
  1635.         let indexSplices = [];
  1636.         let contentUpdates = [];
  1637.         for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1638.           if (beforeParticipants[i] === participants[j]) {
  1639.             i++; j++;
  1640.           } else if (idsBefore[i] === idsAfter[j]) {
  1641.             // content changed
  1642.             contentUpdates.push({ indexI: i, indexJ: j })
  1643.             i++; j++;
  1644.           } else {
  1645.             let addedCount = 0;
  1646.             for (let q = j; q < foundsForAfter.length; q++) {
  1647.               if (foundsForAfter[q] === false) addedCount++;
  1648.               else break;
  1649.             }
  1650.             let removedCount = 0;
  1651.             for (let q = i; q < foundsForBefore.length; q++) {
  1652.               if (foundsForBefore[q] === false) removedCount++;
  1653.               else break;
  1654.             }
  1655.             if (!addedCount && !removedCount) {
  1656.               throw 'ERROR(0xFF32): spliceIndicesFunc';
  1657.             }
  1658.             indexSplices.push(new Proxy({
  1659.               index: j,
  1660.               addedCount: addedCount,
  1661.               removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1662.             }, handler1));
  1663.             i += removedCount;
  1664.             j += addedCount;
  1665.           }
  1666.         }
  1667.         foundsForBefore = null;
  1668.         foundsForAfter = null;
  1669.         idsBefore = null;
  1670.         idsAfter = null;
  1671.         beforeParticipants = null;
  1672.         return { indexSplices, contentUpdates, releaser };
  1673.  
  1674.       }
  1675.  
  1676.       /*
  1677.  
  1678.       customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1679.  
  1680.       VM63631:1 Error
  1681.       at customElements.get.notifyPath (<anonymous>:1:122)
  1682.       at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1683.       at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1684.       at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1685.       at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1686.       at ju (live_chat_polymer.js:1674:217)
  1687.       at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1688.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1689.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1690.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1691.  
  1692.       */
  1693.  
  1694.       function convertToIds(participants) {
  1695.         return participants.map(participant => {
  1696.           if (!participant || typeof participant !== 'object') {
  1697.             console.warn('Error(0xFA41): convertToIds', participant);
  1698.             return participant; // just in case
  1699.           }
  1700.           let keys = Object.keys(participant);
  1701.           // liveChatTextMessageRenderer
  1702.           // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1703.           // liveChatPaidMessageRenderer
  1704.           /*
  1705.  
  1706.             'yt-live-chat-participant-renderer' utilizes the following:
  1707.             authorName.simpleText: string
  1708.             authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1709.             authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1710.             authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1711.             authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1712.  
  1713.           */
  1714.           if (keys.length !== 1) {
  1715.             console.warn('Error(0xFA42): convertToIds', participant);
  1716.             return participant; // just in case
  1717.           }
  1718.           let key = keys[0];
  1719.           let renderer = (participant[key] || 0);
  1720.           let authorName = (renderer.authorName || 0);
  1721.           let text = `${authorName.simpleText || authorName.text}`
  1722.           let res = participant; // fallback if it is not a vaild entry
  1723.           if (typeof text !== 'string') {
  1724.             console.warn('Error(0xFA53): convertToIds', participant);
  1725.           } else {
  1726.             text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1727.             if (text.length > 1) res = text;
  1728.           }
  1729.           return res;
  1730.           // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1731.           // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1732.         });
  1733.       }
  1734.  
  1735.       const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1736.         // just update when content is changed.
  1737.         if (p1.authorName !== p2.authorName) return true;
  1738.         if (p1.authorPhoto !== p2.authorPhoto) return true;
  1739.         if (p1.authorBadges !== p2.authorBadges) return true;
  1740.         return false;
  1741.       } : (p1, p2) => {
  1742.         // keep integrity all the time.
  1743.         return p1 !== p2; // always true
  1744.       }
  1745.  
  1746.       function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1747.  
  1748.         if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1749.           if (path !== "participantsManager.participants") {
  1750.             return this.__notifyPath5036__.apply(this, arguments);
  1751.           }
  1752.           if (c95dm === r95dm) return;
  1753.         } else {
  1754.           const stack = new Error().stack;
  1755.           if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1756.             return this.__notifyPath5036__.apply(this, arguments);
  1757.           }
  1758.         }
  1759.  
  1760.         if (uvid > 1e8) uvid = uvid % 100;
  1761.         let tid = ++uvid;
  1762.  
  1763.         const cnt = this; // "yt-live-chat-participant-list-renderer"
  1764.         mutexParticipants.lockWith(lockResolve => {
  1765.  
  1766.           const participants00 = cnt.participantsManager.participants;
  1767.  
  1768.           if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1769.             lockResolve();
  1770.             return;
  1771.           }
  1772.  
  1773.           let doUpdate = false;
  1774.  
  1775.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1776.  
  1777.             if (!participants00.r94dm) {
  1778.               participants00.r94dm = 1;
  1779.               if (++r95dm > 1e9) r95dm = 9;
  1780.               participants00.push = function () {
  1781.                 if (++r95dm > 1e9) r95dm = 9;
  1782.                 return Array.prototype.push.apply(this, arguments);
  1783.               }
  1784.               participants00.pop = function () {
  1785.                 if (++r95dm > 1e9) r95dm = 9;
  1786.                 return Array.prototype.pop.apply(this, arguments);
  1787.               }
  1788.               participants00.shift = function () {
  1789.                 if (++r95dm > 1e9) r95dm = 9;
  1790.                 return Array.prototype.shift.apply(this, arguments);
  1791.               }
  1792.               participants00.unshift = function () {
  1793.                 if (++r95dm > 1e9) r95dm = 9;
  1794.                 return Array.prototype.unshift.apply(this, arguments);
  1795.               }
  1796.               participants00.splice = function () {
  1797.                 if (++r95dm > 1e9) r95dm = 9;
  1798.                 return Array.prototype.splice.apply(this, arguments);
  1799.               }
  1800.               participants00.sort = function () {
  1801.                 if (++r95dm > 1e9) r95dm = 9;
  1802.                 return Array.prototype.sort.apply(this, arguments);
  1803.               }
  1804.               participants00.reverse = function () {
  1805.                 if (++r95dm > 1e9) r95dm = 9;
  1806.                 return Array.prototype.reverse.apply(this, arguments);
  1807.               }
  1808.             }
  1809.  
  1810.             if (c95dm !== r95dm) {
  1811.               c95dm = r95dm;
  1812.               doUpdate = true;
  1813.             }
  1814.  
  1815.           } else {
  1816.             doUpdate = true;
  1817.           }
  1818.  
  1819.           if (!doUpdate) {
  1820.             lockResolve();
  1821.             return;
  1822.           }
  1823.  
  1824.           const participants = participants00.slice(0);
  1825.           const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1826.           beforeParticipantsMap.set(cnt, participants);
  1827.  
  1828.           const resPromise = (async () => {
  1829.  
  1830.             if (beforeParticipants.length === 0) {
  1831.               // not error
  1832.               return 0;
  1833.             }
  1834.  
  1835.             let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1836.  
  1837.             // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1838.             if (beforeParticipants.length !== countOfElements) {
  1839.               // there is somewrong for the cache. - sometimes happen
  1840.               return 0;
  1841.             }
  1842.  
  1843.             const idsBefore = convertToIds(beforeParticipants);
  1844.             const idsAfter = convertToIds(participants);
  1845.  
  1846.             let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1847.  
  1848.             let res = 1; // default 1 for no update
  1849.  
  1850.             if (indexSplices.length >= 1) {
  1851.  
  1852.  
  1853.               // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1854.               // let p1 = indexSplices[0].removed;
  1855.               // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1856.  
  1857.               /* folllow
  1858.                   a.notifyPath(c + ".splices", d);
  1859.                   a.notifyPath(c + ".length", b.length);
  1860.               */
  1861.               // stampDomArraySplices_
  1862.  
  1863.  
  1864.               await new Promise(resolve => {
  1865.                 cnt.resolveForDOMRendering781 = resolve;
  1866.  
  1867.                 cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1868.                   indexSplices
  1869.                 });
  1870.                 indexSplices = null;
  1871.                 releaser();
  1872.                 releaser = null;
  1873.                 cnt.__notifyPath5036__("participantsManager.participants.length",
  1874.                   participants.length
  1875.                 );
  1876.  
  1877.               });
  1878.  
  1879.               await Promise.resolve(0); // play safe for the change of 'length'
  1880.               countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1881.  
  1882.               let wrongSize = participants.length !== countOfElements
  1883.               if (wrongSize) {
  1884.                 console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1885.                 return 0;
  1886.               }
  1887.  
  1888.               res = 2 | 4;
  1889.  
  1890.             } else {
  1891.  
  1892.               indexSplices = null;
  1893.               releaser();
  1894.               releaser = null;
  1895.  
  1896.               if (participants.length !== countOfElements) {
  1897.                 // other unhandled cases
  1898.                 return 0;
  1899.               }
  1900.  
  1901.             }
  1902.  
  1903.             // participants.length === countOfElements before contentUpdates
  1904.             if (contentUpdates.length >= 1) {
  1905.               for (const contentUpdate of contentUpdates) {
  1906.                 let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1907.                 if (isChanged) {
  1908.                   cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1909.                   res |= 4 | 8;
  1910.                 }
  1911.               }
  1912.             }
  1913.             contentUpdates = null;
  1914.  
  1915.             return res;
  1916.  
  1917.  
  1918.           })();
  1919.  
  1920.  
  1921.           resPromise.then(resValue => {
  1922.  
  1923.             const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1924.             isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1925.             if (resValue === 0) {
  1926.               new Promise(resolve => {
  1927.                 cnt.resolveForDOMRendering781 = resolve;
  1928.                 isLogRequired && console.log("Full Refresh begins");
  1929.                 cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1930.               }).then(() => {
  1931.                 isLogRequired && console.log("Full Refresh ends");
  1932.                 console.groupEnd();
  1933.               }).then(lockResolve);
  1934.               return;
  1935.             }
  1936.  
  1937.             const delayLockResolve = (resValue & 4) === 4;
  1938.  
  1939.             if (delayLockResolve) {
  1940.               isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1941.               isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1942.               isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1943.               isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1944.               isLogRequired && console.groupEnd();
  1945.               // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1946.               // mutex lock with requestAnimationFrame can also disable participants update in background
  1947.               requestAnimationFrame(lockResolve);
  1948.             } else {
  1949.               lockResolve();
  1950.             }
  1951.  
  1952.           });
  1953.  
  1954.         });
  1955.  
  1956.       }
  1957.  
  1958.       return { notifyPath7081 };
  1959.  
  1960.     })();
  1961.  
  1962.  
  1963.     const onRegistryReadyForDataManipulation = () => {
  1964.  
  1965.       function dummy5035(a, b, c) { }
  1966.       function dummy411(a, b, c) { }
  1967.  
  1968.       customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1969.  
  1970.         if (!DO_PARTICIPANT_LIST_HACKS) return;
  1971.  
  1972.         const tag = "yt-live-chat-participant-list-renderer";
  1973.         const cProto = getProto(document.createElement(tag));
  1974.         if (!cProto || typeof cProto.attached !== 'function') {
  1975.           // for _registered, proto.attached shall exist when the element is defined.
  1976.           // for controller extraction, attached shall exist when instance creates.
  1977.           console.warn(`proto.attached for ${tag} is unavailable.`);
  1978.           return;
  1979.         }
  1980.  
  1981.  
  1982.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1983.  
  1984.         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'];
  1985.         const fgs = {};
  1986.         for (const key of fgsArr) fgs[key] = undefined;
  1987.  
  1988.         try {
  1989.           const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1990.           for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1991.         } catch (e) { }
  1992.         console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1993.  
  1994.         const canDoReplacement = (() => {
  1995.           if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1996.             console.warn('YouTube Live Chat Tamer is running.');
  1997.             return;
  1998.           }
  1999.  
  2000.           if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  2001.             console.warn('YouTube Live Chat Tamer is running.');
  2002.             return;
  2003.           }
  2004.  
  2005.           cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  2006.           cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  2007.  
  2008.           if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  2009.             console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  2010.             return;
  2011.           }
  2012.  
  2013.           if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  2014.             console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  2015.             return;
  2016.           }
  2017.  
  2018.           if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  2019.             console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  2020.             return;
  2021.           }
  2022.           return true;
  2023.         })();
  2024.  
  2025.         console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  2026.  
  2027.         assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  2028.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2029.           const fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  2030.           const s = fiRSCB.split('.');
  2031.           if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  2032.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - OK`);
  2033.           } else {
  2034.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - Failed`);
  2035.           }
  2036.         } else {
  2037.           console.log("flushRenderStamperComponentBindings_ - not found");
  2038.         }
  2039.         // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  2040.  
  2041.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2042.           cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  2043.           cProto.flushRenderStamperComponentBindings_ = function () {
  2044.             // console.log('flushRenderStamperComponentBindings_')
  2045.             this.flushRenderStamperComponentBindings66_();
  2046.             if (this.resolveForDOMRendering781) {
  2047.               this.resolveForDOMRendering781();
  2048.               this.resolveForDOMRendering781 = null;
  2049.             }
  2050.           };
  2051.         }
  2052.  
  2053.         cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  2054.           const container = ((this || 0).$ || 0).participants;
  2055.           if (!container) return 0;
  2056.           return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  2057.         }
  2058.  
  2059.         const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  2060.  
  2061.         cProto.__attached412__ = cProto.attached;
  2062.         const fpPList = function (hostElement) {
  2063.           const cnt = hostElement.inst || hostElement;
  2064.           if (beforeParticipantsMap.has(cnt)) return;
  2065.           hostElement.classList.add('n9fJ3');
  2066.  
  2067.           assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  2068.           if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  2069.             console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  2070.             return;
  2071.           }
  2072.  
  2073.           groupCollapsed("Participant List attached", "");
  2074.           // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  2075.           //   console.log(123, 'appendChild');
  2076.           //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  2077.           // }
  2078.  
  2079.           // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  2080.           //   console.log(123, 'insertBefore');
  2081.           //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  2082.           // }
  2083.  
  2084.           cnt.__notifyPath5036__ = cnt.notifyPath
  2085.           const participants = ((cnt.participantsManager || 0).participants || 0);
  2086.           assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  2087.           console.log(`initial number of participants: ${participants.length}`);
  2088.           const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  2089.           beforeParticipantsMap.set(cnt, newParticipants);
  2090.           cnt.notifyPath = notifyPath7081;
  2091.           console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  2092.           console.groupEnd();
  2093.         }
  2094.         cProto.attached = function () {
  2095.           fpPList(this.hostElement || this);
  2096.           this.__attached412__.apply(this, arguments);
  2097.         };
  2098.  
  2099.  
  2100.         if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  2101.  
  2102.           /** @type {boolean | (()=>boolean)} */
  2103.           let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  2104.           if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  2105.  
  2106.             let lastMessageDate = 0;
  2107.             cProto.stampDomArray66_ = cProto.stampDomArray_;
  2108.  
  2109.             cProto.stampDomArray_ = function (...args) {
  2110.               if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  2111.                 if (typeof toUseMaintainStableList === 'function') {
  2112.                   toUseMaintainStableList = toUseMaintainStableList();
  2113.                 }
  2114.                 args[5] = toUseMaintainStableList;
  2115.                 let currentDate = Date.now();
  2116.                 if (currentDate - lastMessageDate > 440) {
  2117.                   lastMessageDate = currentDate;
  2118.                   console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  2119.                 }
  2120.               }
  2121.               return this.stampDomArray66_.apply(this, args);
  2122.             }
  2123.  
  2124.             cProto.stampDomArray_.nIegT = 1;
  2125.  
  2126.           }
  2127.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  2128.         } else {
  2129.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  2130.         }
  2131.  
  2132.         console.groupEnd();
  2133.  
  2134.         if (onPageElements.length >= 1) {
  2135.           for (const s of onPageElements) {
  2136.             if ((s.inst || s).isAttached === true) {
  2137.               fpPList(s);
  2138.             }
  2139.           }
  2140.         }
  2141.  
  2142.       }).catch(console.warn);
  2143.  
  2144.     };
  2145.  
  2146.     if (DO_PARTICIPANT_LIST_HACKS) {
  2147.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2148.     }
  2149.  
  2150.  
  2151.  
  2152.     const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2153.  
  2154.  
  2155.  
  2156.  
  2157.     const bnForDelayChatOccurrence = () => {
  2158.  
  2159.       document.addEventListener('animationstart', (evt) => {
  2160.  
  2161.         if (evt.animationName === 'dontRenderAnimation') {
  2162.           evt.target.classList.remove('dont-render');
  2163.           if (scrollChatFn) scrollChatFn();
  2164.         }
  2165.  
  2166.       }, true);
  2167.  
  2168.       const f = (elm) => {
  2169.         if (elm && elm.nodeType === 1) {
  2170.           if (!skipDontRender && allowDontRender === true) {
  2171.             // innerTextFixFn();
  2172.             elm.classList.add('dont-render');
  2173.           }
  2174.         }
  2175.       }
  2176.  
  2177.       Node.prototype.__appendChild931__ = function (a) {
  2178.         a = dr(a);
  2179.         if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2180.           if (a && a.nodeType === 1) f(a);
  2181.           else if (a instanceof DocumentFragment) {
  2182.             for (let n = a.firstChild; n; n = n.nextSibling) {
  2183.               f(n);
  2184.             }
  2185.           }
  2186.         }
  2187.       }
  2188.  
  2189.       Node.prototype.__appendChild932__ = function () {
  2190.         this.__appendChild931__.apply(this, arguments);
  2191.         return Node.prototype.appendChild.apply(this, arguments);
  2192.       }
  2193.  
  2194.  
  2195.     };
  2196.  
  2197.     const watchUserCSS = () => {
  2198.  
  2199.       // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2200.  
  2201.       const getElemFromWR = (nr) => {
  2202.         const n = kRef(nr);
  2203.         if (n && n.isConnected) return n;
  2204.         return null;
  2205.       }
  2206.  
  2207.       const clearContentVisibilitySizing = () => {
  2208.         Promise.resolve().then(() => {
  2209.  
  2210.           const e = document.querySelector('#show-more[disabled]');
  2211.           let btnShowMoreWR = e ? mWeakRef(e) : null;
  2212.  
  2213.           let lastVisibleItemWR = null;
  2214.           for (const elm of document.querySelectorAll('[wSr93]')) {
  2215.             if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2216.             elm.setAttribute('wSr93', '');
  2217.             // custom CSS property --wsr94 not working when attribute wSr93 removed
  2218.           }
  2219.           requestAnimationFrame(() => {
  2220.             const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2221.             if (btnShowMore) btnShowMore.click();
  2222.             else {
  2223.               // would not work if switch it frequently
  2224.               const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2225.               if (lastVisibleItem) {
  2226.  
  2227.                 Promise.resolve()
  2228.                   .then(() => lastVisibleItem.scrollIntoView())
  2229.                   .then(() => lastVisibleItem.scrollIntoView(false))
  2230.                   .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2231.                   .catch(e => { }) // break the chain when method not callable
  2232.  
  2233.               }
  2234.             }
  2235.           });
  2236.  
  2237.         });
  2238.  
  2239.       }
  2240.  
  2241.       const mutObserver = new MutationObserver((mutations) => {
  2242.         for (const mutation of mutations) {
  2243.           if ((mutation.addedNodes || 0).length >= 1) {
  2244.             for (const addedNode of mutation.addedNodes) {
  2245.               if (addedNode.nodeName === 'STYLE') {
  2246.                 clearContentVisibilitySizing();
  2247.                 return;
  2248.               }
  2249.             }
  2250.           }
  2251.           if ((mutation.removedNodes || 0).length >= 1) {
  2252.             for (const removedNode of mutation.removedNodes) {
  2253.               if (removedNode.nodeName === 'STYLE') {
  2254.                 clearContentVisibilitySizing();
  2255.                 return;
  2256.               }
  2257.             }
  2258.           }
  2259.         }
  2260.       });
  2261.  
  2262.       mutObserver.observe(document.documentElement, {
  2263.         childList: true,
  2264.         subtree: false
  2265.       });
  2266.       mutObserver.observe(document.head, {
  2267.         childList: true,
  2268.         subtree: false
  2269.       });
  2270.       mutObserver.observe(document.body, {
  2271.         childList: true,
  2272.         subtree: false
  2273.       });
  2274.  
  2275.     }
  2276.  
  2277.  
  2278.     class WillChangeController {
  2279.       constructor(itemScroller, willChangeValue) {
  2280.         this.element = itemScroller;
  2281.         this.counter = 0;
  2282.         this.active = false;
  2283.         this.willChangeValue = willChangeValue;
  2284.       }
  2285.  
  2286.       beforeOper() {
  2287.         if (!this.active) {
  2288.           this.active = true;
  2289.           this.element.style.willChange = this.willChangeValue;
  2290.         }
  2291.         this.counter++;
  2292.       }
  2293.  
  2294.       afterOper() {
  2295.         const c = this.counter;
  2296.         requestAnimationFrame(() => {
  2297.           if (c === this.counter) {
  2298.             this.active = false;
  2299.             this.element.style.willChange = '';
  2300.           }
  2301.         });
  2302.       }
  2303.  
  2304.       release() {
  2305.         const element = this.element;
  2306.         this.element = null;
  2307.         this.counter = 1e16;
  2308.         this.active = false;
  2309.         try {
  2310.           element.style.willChange = '';
  2311.         } catch (e) { }
  2312.       }
  2313.  
  2314.     }
  2315.  
  2316.  
  2317.     const skzData = (skz) => skz.data = {
  2318.       "message": {
  2319.         "runs": [
  2320.           {
  2321.             "text": "em2o"
  2322.           },
  2323.           {
  2324.             "emoji": {
  2325.               "emojiId": "cm35z",
  2326.               "shortcuts": [
  2327.                 ":_s:",
  2328.                 ":s:"
  2329.               ],
  2330.               "searchTerms": [
  2331.                 "_s",
  2332.                 "s"
  2333.               ],
  2334.               "image": {
  2335.                 "thumbnails": [
  2336.                   {
  2337.                     "url": dummyImgURL,
  2338.                     "width": 48,
  2339.                     "height": 48
  2340.                   }
  2341.                 ],
  2342.                 "accessibility": {
  2343.                   "accessibilityData": {
  2344.                     "label": "s"
  2345.                   }
  2346.                 }
  2347.               },
  2348.               "isCustomEmoji": true
  2349.             }
  2350.           },
  2351.           {
  2352.             "text": "ji"
  2353.           }
  2354.         ]
  2355.       },
  2356.       "authorName": {
  2357.         "simpleText": "N"
  2358.       },
  2359.       "authorPhoto": {
  2360.         "thumbnails": [
  2361.           {
  2362.             "url": dummyImgURL,
  2363.             "width": 64,
  2364.             "height": 64
  2365.           }
  2366.         ]
  2367.       },
  2368.       "contextMenuEndpoint": {
  2369.         "commandMetadata": {
  2370.           "webCommandMetadata": {
  2371.             "ignoreNavigation": true
  2372.           }
  2373.         },
  2374.         "liveChatItemContextMenuEndpoint": {
  2375.           "params": "123=="
  2376.         }
  2377.       },
  2378.       "id": "sk35z",
  2379.       "timestampUsec": "1232302352350000",
  2380.       "authorBadges": [
  2381.         {
  2382.           "liveChatAuthorBadgeRenderer": {
  2383.             "customThumbnail": {
  2384.               "thumbnails": [
  2385.                 {
  2386.                   "url": dummyImgURL,
  2387.                   "width": 16,
  2388.                   "height": 16
  2389.                 },
  2390.                 {
  2391.                   "url": dummyImgURL,
  2392.                   "width": 32,
  2393.                   "height": 32
  2394.                 }
  2395.               ]
  2396.             },
  2397.             "tooltip": "T",
  2398.             "accessibility": {
  2399.               "accessibilityData": {
  2400.                 "label": "E"
  2401.               }
  2402.             }
  2403.           }
  2404.         }
  2405.       ],
  2406.       "authorExternalChannelId": "A",
  2407.       "contextMenuAccessibility": {
  2408.         "accessibilityData": {
  2409.           "label": "E"
  2410.         }
  2411.       },
  2412.       "timestampText": {
  2413.         "simpleText": "0:43"
  2414.       }
  2415.     };
  2416.  
  2417.  
  2418.  
  2419.     const { lcRendererElm, visObserver } = (() => {
  2420.  
  2421.  
  2422.  
  2423.       let lcRendererWR = null;
  2424.  
  2425.       const lcRendererElm = () => {
  2426.         let lcRenderer = kRef(lcRendererWR);
  2427.         if (!lcRenderer || !lcRenderer.isConnected) {
  2428.           lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2429.           lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2430.         }
  2431.         return lcRenderer;
  2432.       };
  2433.  
  2434.  
  2435.       let hasFirstShowMore = false;
  2436.  
  2437.       const visObserverFn = (entry) => {
  2438.  
  2439.         const target = entry.target;
  2440.         if (!target) return;
  2441.         // if(target.classList.contains('dont-render')) return;
  2442.         let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2443.         // const h = entry.boundingClientRect.height;
  2444.         /*
  2445.         if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2446.             // e.g. under fullscreen. the element created but not rendered.
  2447.             target.setAttribute('wSr93', '');
  2448.             return;
  2449.         }
  2450.         */
  2451.         if (isVisible) {
  2452.           // target.style.setProperty('--wsr94', h + 'px');
  2453.           target.setAttribute('wSr93', 'visible');
  2454.           if (nNextElem(target) === null) {
  2455.  
  2456.             // firstVisibleItemDetected = true;
  2457.             /*
  2458.               if (dateNow() - lastScroll < 80) {
  2459.                   lastLShow = 0;
  2460.                   lastScroll = 0;
  2461.                   Promise.resolve().then(clickShowMore);
  2462.               } else {
  2463.                   lastLShow = dateNow();
  2464.               }
  2465.               */
  2466.             // lastLShow = dateNow();
  2467.           } else if (!hasFirstShowMore) { // should more than one item being visible
  2468.             // implement inside visObserver to ensure there is sufficient delay
  2469.             hasFirstShowMore = true;
  2470.             requestAnimationFrame(() => {
  2471.               // foreground page
  2472.               // page visibly ready -> load the latest comments at initial loading
  2473.               const lcRenderer = lcRendererElm();
  2474.               if (lcRenderer) {
  2475.                 (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2476.               }
  2477.             });
  2478.           }
  2479.         }
  2480.         else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2481.  
  2482.           // target.style.setProperty('--wsr94', h + 'px');
  2483.           target.setAttribute('wSr93', 'hidden');
  2484.         } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2485.  
  2486.       }
  2487.  
  2488.  
  2489.  
  2490.       const visObserver = new IntersectionObserver((entries) => {
  2491.  
  2492.         for (const entry of entries) {
  2493.  
  2494.           Promise.resolve(entry).then(visObserverFn);
  2495.  
  2496.         }
  2497.  
  2498.       }, {
  2499.         // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2500.         rootMargin: "0px",
  2501.         threshold: [0.05, 0.95],
  2502.       });
  2503.  
  2504.  
  2505.       return { lcRendererElm, visObserver }
  2506.  
  2507.  
  2508.     })();
  2509.  
  2510.     const { setupMutObserver } = (() => {
  2511.  
  2512.       const mutFn = (items) => {
  2513.         for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2514.           if (node.hasAttribute('wSr93')) break;
  2515.           node.setAttribute('wSr93', '');
  2516.           visObserver.observe(node);
  2517.         }
  2518.       }
  2519.  
  2520.       const mutObserver = new MutationObserver((mutations) => {
  2521.         const items = (mutations[0] || 0).target;
  2522.         if (!items) return;
  2523.         if (sk35zResolveFn) {
  2524.           sk35zResolveFn();
  2525.           sk35zResolveFn = null;
  2526.         }
  2527.         mutFn(items);
  2528.       });
  2529.  
  2530.       const setupMutObserver = (m2) => {
  2531.         scrollChatFn = null;
  2532.         mutObserver.disconnect();
  2533.         mutObserver.takeRecords();
  2534.         if (m2) {
  2535.           ENABLE_DELAYED_CHAT_OCCURRENCE && bnForDelayChatOccurrence();
  2536.           if (typeof m2.__appendChild932__ === 'function') {
  2537.             if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2538.             if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2539.           }
  2540.           mutObserver.observe(m2, {
  2541.             childList: true,
  2542.             subtree: false
  2543.           });
  2544.           mutFn(m2);
  2545.  
  2546.           const isFirstList = firstList;
  2547.           firstList = false;
  2548.  
  2549.           if (ENABLE_OVERFLOW_ANCHOR) {
  2550.  
  2551.             let items = m2;
  2552.             let addedAnchor = false;
  2553.             if (items) {
  2554.               if (items.nextElementSibling === null) {
  2555.                 items.classList.add('no-anchor');
  2556.                 addedAnchor = true;
  2557.                 items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2558.               }
  2559.             }
  2560.  
  2561.  
  2562.  
  2563.             if (addedAnchor) {
  2564.               nodeParent(m2).classList.add('no-anchor'); // required
  2565.             }
  2566.  
  2567.           }
  2568.  
  2569.           // let div = document.createElement('div');
  2570.           // div.id = 'qwcc';
  2571.           // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2572.           // bufferRegion =div;
  2573.  
  2574.           // buffObserver.takeRecords();
  2575.           // buffObserver.disconnect();
  2576.           // buffObserver.observe(div,  {
  2577.           //     childList: true,
  2578.           //     subtree: false
  2579.           // })
  2580.  
  2581.           if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2582.  
  2583.             promiseForCustomYtElementsReady.then(() => {
  2584.  
  2585.               customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2586.  
  2587.  
  2588.  
  2589.  
  2590.                 setTimeout(() => {
  2591.  
  2592.                   /** @type {HTMLTemplateElement} */
  2593.                   let skz = document.createElement('yt-live-chat-text-message-renderer');
  2594.  
  2595.                   let cz1 = null;
  2596.  
  2597.                   if (skz && 'data' in skz && 'attached' in skz) {
  2598.  
  2599.                     const deferredZy1 = new Promise(resolve => {
  2600.  
  2601.                       skz.attached = function () {
  2602.                         cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2603.                         resolve(skz.textContent);
  2604.                       }
  2605.                       skz.detached = function () {
  2606.  
  2607.                       }
  2608.  
  2609.                     });
  2610.                     skz.id = 'sk35z';
  2611.                     skzData(skz);
  2612.  
  2613.  
  2614.                     sk35zResolveFn = null;
  2615.                     const deferredMutation = new Promise(resolve => {
  2616.                       sk35zResolveFn = resolve;
  2617.                       HTMLElement.prototype.appendChild.call(m2, skz);
  2618.                     });
  2619.  
  2620.                     Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2621.                       const [zy1, _] = res;
  2622.                       function fn() {
  2623.                         const zy2 = skz.textContent;
  2624.                         const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2625.                         if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2626.                           allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2627.                         }
  2628.                         if (allowDontRender === false) {
  2629.  
  2630.                           console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2631.                             "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2632.                             "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2633.                           );
  2634.  
  2635.                           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');
  2636.  
  2637.                           console.groupEnd();
  2638.                         } else if (allowDontRender === true) {
  2639.                           return true;
  2640.                         }
  2641.                       }
  2642.                       await new Promise(r => setTimeout(r, 1));
  2643.                       if (fn()) {
  2644.                         await new Promise(r => requestAnimationFrame(r));
  2645.                         if (fn()) {
  2646.                           skz.remove();
  2647.                           skz.textContent = '';
  2648.                           console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2649.                         }
  2650.                       }
  2651.                     });
  2652.  
  2653.                   }
  2654.  
  2655.                 }, 1);
  2656.  
  2657.               }).catch(console.warn);
  2658.  
  2659.             })
  2660.  
  2661.           }
  2662.  
  2663.  
  2664.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2665.  
  2666.             (() => {
  2667.  
  2668.               const tag = 'yt-iframed-player-events-relay'
  2669.               const dummy = document.createElement(tag);
  2670.  
  2671.               const cProto = getProto(dummy);
  2672.               if (!cProto || !cProto.handlePostMessage_) {
  2673.                 console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2674.                 return;
  2675.               }
  2676.  
  2677.               if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2678.  
  2679.                 cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2680.  
  2681.                 cProto.handlePostMessage_ = function (a) {
  2682.  
  2683.                   const da = (a || 0).data || 0;
  2684.                   if (typeof da === 'object') {
  2685.  
  2686.                     // console.log('handlePostMessage_', da)
  2687.                     const qc = da['yt-player-state-change'];
  2688.                     if (qc === 3) { // pause
  2689.                       pairForPauseResume++;
  2690.                       pairForPauseResumeM++;
  2691.                     } else if (qc === 1) { // pause
  2692.                       pairForPauseResume++;
  2693.                       pairForPauseResumeM++;
  2694.                     } else if (qc === 2) {
  2695.                       pairForPauseResume++;
  2696.                       pairForPauseResumeM++;
  2697.                     }
  2698.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  2699.                     if (pairForPauseResumeM > 1e9) pairForPauseResumeM = pairForPauseResumeM % 1e4;
  2700.                     return this.handlePostMessage66_(a);
  2701.  
  2702.                   }
  2703.  
  2704.  
  2705.                 }
  2706.  
  2707.               }
  2708.  
  2709.  
  2710.             })();
  2711.  
  2712.           }
  2713.  
  2714.           if (isFirstList && DO_CHECK_TICKER_BACKGROUND_OVERRIDED) {
  2715.             setTimeout(() => {
  2716.               if (!hasTimerModified) return;
  2717.               const tickerRenderer = document.querySelector('#ticker yt-live-chat-ticker-renderer.style-scope.yt-live-chat-renderer');
  2718.               if (!tickerRenderer) return;
  2719.  
  2720.               const items = (tickerRenderer.$ || 0).items || 0;
  2721.               if (!items) return;
  2722.               const template = document.createElement('template');
  2723.               template.innerHTML = `<yt-live-chat-ticker-dummy777-item-renderer class="style-scope yt-live-chat-ticker-renderer" whole-message-clickable=""
  2724.                 modern="" aria-label="¥1,000" role="button" tabindex="0" id="Chw777" style="width: 94px; overflow: hidden;"
  2725.                 dimmed="" [dummy777]>
  2726.                 <div id="container" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer"
  2727.                   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));">
  2728.                   <div id="content" class="style-scope yt-live-chat-ticker-dummy777-item-renderer" style="color: rgb(255, 255, 255);">
  2729.                     <yt-img-shadow777 id="author-photo" height="24" width="24"
  2730.                       class="style-scope yt-live-chat-ticker-dummy777-item-renderer no-transition"
  2731.                       style="background-color: transparent;" loaded=""><img id="img"
  2732.                         draggable="false" class="style-scope yt-img-shadow" alt="I" height="24" width="24"
  2733.                         src="${dummyImgURL}"></yt-img-shadow777>
  2734.  
  2735.                     <span id="text" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer">¥1,000</span>
  2736.                   </div>
  2737.                 </div>
  2738.               </yt-live-chat-ticker-dummy777-item-renderer>`;
  2739.               const dummy777 = template.content.firstElementChild;
  2740.               items.appendChild(dummy777);
  2741.               Promise.resolve(dummy777).then((dummy777) => {
  2742.                 let container = HTMLElement.prototype.querySelector.call(dummy777, '#container') || 0;
  2743.                 if (container.isConnected === true) {
  2744.  
  2745.                   const evaluated = `${window.getComputedStyle(container).background}`;
  2746.  
  2747.                   container = null;
  2748.                   dummy777.remove();
  2749.                   dummy777.textContent = '';
  2750.                   dummy777 = null;
  2751.  
  2752.                   if (evaluated.indexOf('0.') < 4) {
  2753.  
  2754.                     // not fulfilling
  2755.                     // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  2756.  
  2757.                     console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2758.                       "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2759.                       "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2760.                     );
  2761.                     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');
  2762.                     console.groupEnd();
  2763.  
  2764.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND (Overriding other scripting)', 'background-color: #7eb32b; color: #102624; padding: 2px 4px');
  2765.  
  2766.                   } else {
  2767.  
  2768.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2769.                   }
  2770.                 }
  2771.               });
  2772.  
  2773.             }, 800);
  2774.           }
  2775.  
  2776.         }
  2777.       }
  2778.  
  2779.       return { setupMutObserver };
  2780.  
  2781.  
  2782.  
  2783.     })();
  2784.  
  2785.     const setupEvents = () => {
  2786.  
  2787.  
  2788.       let scrollCount = 0;
  2789.  
  2790.       const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2791.  
  2792.  
  2793.       const delayFlushActiveItemsAfterUserActionK_ = () => {
  2794.  
  2795.         const lcRenderer = lcRendererElm();
  2796.         if (lcRenderer) {
  2797.           const cnt = (lcRenderer.inst || lcRenderer);
  2798.           if (!cnt.hasUserJustInteracted11_) return;
  2799.           if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2800.             cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2801.           }
  2802.         }
  2803.  
  2804.       }
  2805.  
  2806.       document.addEventListener('scroll', (evt) => {
  2807.         if (!evt || !evt.isTrusted) return;
  2808.         // lastScroll = dateNow();
  2809.         if (++scrollCount > 1e9) scrollCount = 9;
  2810.       }, passiveCapture); // support contain => support passive
  2811.  
  2812.       let lastScrollCount = -1;
  2813.       document.addEventListener('wheel', (evt) => {
  2814.         if (!evt || !evt.isTrusted) return;
  2815.         if (lastScrollCount === scrollCount) return;
  2816.         lastScrollCount = scrollCount;
  2817.         lastWheel = dateNow();
  2818.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2819.       }, passiveCapture); // support contain => support passive
  2820.  
  2821.       document.addEventListener('mousedown', (evt) => {
  2822.         if (!evt || !evt.isTrusted) return;
  2823.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2824.         lastMouseDown = dateNow();
  2825.         currentMouseDown = true;
  2826.         lastUserInteraction = lastMouseDown;
  2827.       }, passiveCapture);
  2828.  
  2829.       document.addEventListener('pointerdown', (evt) => {
  2830.         if (!evt || !evt.isTrusted) return;
  2831.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2832.         lastMouseDown = dateNow();
  2833.         currentMouseDown = true;
  2834.         lastUserInteraction = lastMouseDown;
  2835.       }, passiveCapture);
  2836.  
  2837.       document.addEventListener('click', (evt) => {
  2838.         if (!evt || !evt.isTrusted) return;
  2839.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2840.         lastMouseDown = lastMouseUp = dateNow();
  2841.         currentMouseDown = false;
  2842.         lastUserInteraction = lastMouseDown;
  2843.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2844.       }, passiveCapture);
  2845.  
  2846.       document.addEventListener('tap', (evt) => {
  2847.         if (!evt || !evt.isTrusted) return;
  2848.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2849.         lastMouseDown = lastMouseUp = dateNow();
  2850.         currentMouseDown = false;
  2851.         lastUserInteraction = lastMouseDown;
  2852.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2853.       }, passiveCapture);
  2854.  
  2855.  
  2856.       document.addEventListener('mouseup', (evt) => {
  2857.         if (!evt || !evt.isTrusted) return;
  2858.         if (currentMouseDown) {
  2859.           lastMouseUp = dateNow();
  2860.           currentMouseDown = false;
  2861.           lastUserInteraction = lastMouseUp;
  2862.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2863.         }
  2864.       }, passiveCapture);
  2865.  
  2866.  
  2867.       document.addEventListener('pointerup', (evt) => {
  2868.         if (!evt || !evt.isTrusted) return;
  2869.         if (currentMouseDown) {
  2870.           lastMouseUp = dateNow();
  2871.           currentMouseDown = false;
  2872.           lastUserInteraction = lastMouseUp;
  2873.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2874.         }
  2875.       }, passiveCapture);
  2876.  
  2877.       document.addEventListener('touchstart', (evt) => {
  2878.         if (!evt || !evt.isTrusted) return;
  2879.         lastTouchDown = dateNow();
  2880.         currentTouchDown = true;
  2881.         lastUserInteraction = lastTouchDown;
  2882.       }, passiveCapture);
  2883.  
  2884.       document.addEventListener('touchmove', (evt) => {
  2885.         if (!evt || !evt.isTrusted) return;
  2886.         lastTouchDown = dateNow();
  2887.         currentTouchDown = true;
  2888.         lastUserInteraction = lastTouchDown;
  2889.       }, passiveCapture);
  2890.  
  2891.       document.addEventListener('touchend', (evt) => {
  2892.         if (!evt || !evt.isTrusted) return;
  2893.         if (currentTouchDown) {
  2894.           lastTouchUp = dateNow();
  2895.           currentTouchDown = false;
  2896.           lastUserInteraction = lastTouchUp;
  2897.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2898.         }
  2899.       }, passiveCapture);
  2900.  
  2901.       document.addEventListener('touchcancel', (evt) => {
  2902.         if (!evt || !evt.isTrusted) return;
  2903.         if (currentTouchDown) {
  2904.           lastTouchUp = dateNow();
  2905.           currentTouchDown = false;
  2906.           lastUserInteraction = lastTouchUp;
  2907.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2908.         }
  2909.       }, passiveCapture);
  2910.  
  2911.  
  2912.     }
  2913.  
  2914.  
  2915.     const onRegistryReadyForDOMOperations = () => {
  2916.  
  2917.       let firstCheckedOnYtInit = false;
  2918.  
  2919.       const assertorURL = () => assertor(() => location.pathname.startsWith('/live_chat') && (location.search.indexOf('continuation=') > 0 || location.search.indexOf('v=') > 0));
  2920.  
  2921.       const mightFirstCheckOnYtInit = () => {
  2922.         if (firstCheckedOnYtInit) return;
  2923.         firstCheckedOnYtInit = true;
  2924.  
  2925.         if (!document.body || !document.head) return;
  2926.         if (!assertorURL()) return;
  2927.  
  2928.         addCssManaged();
  2929.  
  2930.         let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2931.         if (efsContainer && efsContainer.parentNode !== document.body) {
  2932.           document.body.appendChild(efsContainer);
  2933.         }
  2934.  
  2935.       };
  2936.  
  2937.       if (!assertorURL()) return;
  2938.       // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2939.  
  2940.       if (document.documentElement && document.head) {
  2941.         addCssManaged();
  2942.       }
  2943.       // console.log(document.body===null)
  2944.  
  2945.       customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2946.  
  2947.         const tag = "yt-live-chat-item-list-renderer"
  2948.         const dummy = document.createElement(tag);
  2949.  
  2950.         const cProto = getProto(dummy);
  2951.         if (!cProto || !cProto.attached) {
  2952.           console.warn(`proto.attached for ${tag} is unavailable.`);
  2953.           return;
  2954.         }
  2955.  
  2956.         mightFirstCheckOnYtInit();
  2957.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2958.         console.log("[Begin]");
  2959.  
  2960.         const mclp = cProto;
  2961.         try {
  2962.           assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2963.           assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2964.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2965.           assertor(() => typeof mclp.setAtBottom === 'function');
  2966.           assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2967.           assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2968.         } catch (e) { }
  2969.  
  2970.  
  2971.         try {
  2972.           assertor(() => typeof mclp.attached === 'function');
  2973.           assertor(() => typeof mclp.detached === 'function');
  2974.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2975.           assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2976.           assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2977.           assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2978.           assertor(() => typeof mclp.smoothScroll_ === 'function');
  2979.           assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2980.         } catch (e) { }
  2981.  
  2982.         mclp.__intermediate_delay__ = null;
  2983.  
  2984.         let mzk = 0;
  2985.         let myk = 0;
  2986.         let mlf = 0;
  2987.         let myw = 0;
  2988.         let mzt = 0;
  2989.         let zarr = null;
  2990.         let mlg = 0;
  2991.  
  2992.         if ((mclp.clearList || 0).length === 0) {
  2993.           assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2994.           mclp.clearList66 = mclp.clearList;
  2995.           mclp.clearList = function () {
  2996.             mzk++;
  2997.             myk++;
  2998.             mlf++;
  2999.             myw++;
  3000.             mzt++;
  3001.             mlg++;
  3002.             zarr = null;
  3003.             this.__intermediate_delay__ = null;
  3004.             this.clearList66();
  3005.           };
  3006.           console.log("clearList", "OK");
  3007.         } else {
  3008.           console.log("clearList", "NG");
  3009.         }
  3010.  
  3011.  
  3012.         let onListRendererAttachedDone = false;
  3013.  
  3014.         function setList(itemOffset, items) {
  3015.  
  3016.           const isFirstTime = onListRendererAttachedDone === false;
  3017.  
  3018.           if (isFirstTime) {
  3019.             onListRendererAttachedDone = true;
  3020.             Promise.resolve().then(watchUserCSS);
  3021.             addCssManaged();
  3022.             setupEvents();
  3023.           }
  3024.  
  3025.           setupStyle(itemOffset, items);
  3026.  
  3027.           setupMutObserver(items);
  3028.         }
  3029.  
  3030.         mclp.attached419 = async function () {
  3031.  
  3032.           if (!this.isAttached) return;
  3033.  
  3034.           let maxTrial = 16;
  3035.           while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  3036.             if (--maxTrial < 0 || !this.isAttached) return;
  3037.             await new Promise(requestAnimationFrame);
  3038.           }
  3039.  
  3040.           if (this.isAttached !== true) return;
  3041.  
  3042.           if (!this.$) {
  3043.             console.warn("!this.$");
  3044.             return;
  3045.           }
  3046.           if (!this.$) return;
  3047.           /** @type {HTMLElement | null} */
  3048.           const itemScroller = this.$['item-scroller'];
  3049.           /** @type {HTMLElement | null} */
  3050.           const itemOffset = this.$['item-offset'];
  3051.           /** @type {HTMLElement | null} */
  3052.           const items = this.$['items'];
  3053.  
  3054.           if (!itemScroller || !itemOffset || !items) {
  3055.             console.warn("items.parentNode !== itemOffset");
  3056.             return;
  3057.           }
  3058.  
  3059.           if (nodeParent(items) !== itemOffset) {
  3060.  
  3061.             console.warn("items.parentNode !== itemOffset");
  3062.             return;
  3063.           }
  3064.  
  3065.  
  3066.           if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  3067.  
  3068.             console.warn("id incorrect");
  3069.             return;
  3070.           }
  3071.  
  3072.           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')
  3073.  
  3074.           if (!isTargetItems) {
  3075.             console.warn("!isTargetItems");
  3076.             return;
  3077.           }
  3078.  
  3079.           setList(itemOffset, items);
  3080.  
  3081.         }
  3082.  
  3083.         mclp.attached331 = mclp.attached;
  3084.         mclp.attached = function () {
  3085.           this.attached419 && this.attached419();
  3086.           return this.attached331();
  3087.         }
  3088.  
  3089.         mclp.detached331 = mclp.detached;
  3090.  
  3091.         mclp.detached = function () {
  3092.           setupMutObserver();
  3093.           return this.detached331();
  3094.         }
  3095.  
  3096.         const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  3097.         for (const t29 of t29s) {
  3098.           if ((t29.inst || t29).isAttached === true) {
  3099.             t29.attached419();
  3100.           }
  3101.         }
  3102.  
  3103.         if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  3104.  
  3105.           assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  3106.           assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  3107.  
  3108.           /** @type {Map<number, any>} */
  3109.           const aMap = new Map();
  3110.           let count = 6150;
  3111.           mclp.async66 = mclp.async;
  3112.           mclp.async = function (e, f) {
  3113.             // ensure the previous operation is done
  3114.             // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  3115.             const hasF = arguments.length === 2;
  3116.             const stack = new Error().stack;
  3117.             const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  3118.             if (count > 1e9) count = 6159;
  3119.             const resId = ++count;
  3120.             aMap.set(resId, e);
  3121.             (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  3122.               const rp = aMap.get(resId);
  3123.               if (typeof rp !== 'function') {
  3124.                 return;
  3125.               }
  3126.               let cancelCall = false;
  3127.               if (isFlushAsync) {
  3128.                 if (rk < 0) {
  3129.                   cancelCall = true;
  3130.                 } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  3131.                   cancelCall = true;
  3132.                 }
  3133.               }
  3134.               if (cancelCall) {
  3135.                 aMap.delete(resId);
  3136.               } else {
  3137.                 const asyncEn = function () {
  3138.                   aMap.delete(resId);
  3139.                   return rp.apply(this, arguments);
  3140.                 };
  3141.                 aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3142.               }
  3143.             });
  3144.  
  3145.             return resId;
  3146.           }
  3147.  
  3148.           mclp.cancelAsync66 = mclp.cancelAsync;
  3149.           mclp.cancelAsync = function (resId) {
  3150.             if (resId <= 6150) {
  3151.               this.cancelAsync66(resId);
  3152.             } else if (aMap.has(resId)) {
  3153.               const rp = aMap.get(resId);
  3154.               aMap.delete(resId);
  3155.               if (typeof rp !== 'function') {
  3156.                 this.cancelAsync66(rp);
  3157.               }
  3158.             }
  3159.           }
  3160.  
  3161.           console.log("async", "OK");
  3162.         } else {
  3163.           console.log("async", "NG");
  3164.         }
  3165.  
  3166.  
  3167.         if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3168.  
  3169.           assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3170.           mclp.showNewItems66_ = mclp.showNewItems_;
  3171.  
  3172.           mclp.showNewItems77_ = async function () {
  3173.             if (myk > 1e9) myk = 9;
  3174.             let tid = ++myk;
  3175.  
  3176.             await new Promise(requestAnimationFrame);
  3177.  
  3178.             if (tid !== myk) {
  3179.               return;
  3180.             }
  3181.  
  3182.             const cnt = this;
  3183.  
  3184.             await Promise.resolve();
  3185.             cnt.showNewItems66_();
  3186.  
  3187.             await Promise.resolve();
  3188.  
  3189.           }
  3190.  
  3191.           mclp.showNewItems_ = function () {
  3192.  
  3193.             const cnt = this;
  3194.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3195.               cnt.showNewItems77_().then(() => {
  3196.                 resolve();
  3197.               });
  3198.             });
  3199.           }
  3200.  
  3201.           console.log("showNewItems_", "OK");
  3202.         } else {
  3203.           console.log("showNewItems_", "NG");
  3204.         }
  3205.  
  3206.  
  3207.         if ((mclp.flushActiveItems_ || 0).length === 0) {
  3208.  
  3209.           assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3210.  
  3211.           let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3212.  
  3213.           let contensWillChangeController = null;
  3214.  
  3215.           mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3216.  
  3217.           mclp.flushActiveItems78_ = async function (tid) {
  3218.             try {
  3219.               if (tid !== mlf) return;
  3220.               const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3221.               let logger = false;
  3222.               const cnt = this;
  3223.               let immd = cnt.__intermediate_delay__;
  3224.               await new Promise(requestAnimationFrame);
  3225.  
  3226.               if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3227.               if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3228.  
  3229.               mlf++;
  3230.               if (mlg > 1e9) mlg = 9;
  3231.               ++mlg;
  3232.  
  3233.               const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3234.               const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3235.               let changeMaxItemsToDisplay = false;
  3236.               const activeItemsLen = this.activeItems_.length;
  3237.               if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3238.                 logger = true;
  3239.  
  3240.                 groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3241.  
  3242.                 logger && console.log('[Begin]')
  3243.  
  3244.                 console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3245.                 if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3246.                   console.log('reduce maxitems');
  3247.                   if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3248.                     // as all the rendered chats are already "outdated"
  3249.                     // all old chats shall remove and reduced number of few chats will be rendered
  3250.                     // then restore to the original number
  3251.                     changeMaxItemsToDisplay = true;
  3252.                     this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3253.                     console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3254.                   }
  3255.                   this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3256.                   //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3257.  
  3258.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3259.                 } else {
  3260.                   this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3261.  
  3262.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3263.                 }
  3264.               }
  3265.               // it is found that it will render all stacked chats after switching back from background
  3266.               // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3267.               // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3268.  
  3269.  
  3270.               const items = (cnt.$ || 0).items;
  3271.  
  3272.               if (USE_WILL_CHANGE_CONTROLLER) {
  3273.                 if (contensWillChangeController && contensWillChangeController.element !== items) {
  3274.                   contensWillChangeController.release();
  3275.                   contensWillChangeController = null;
  3276.                 }
  3277.                 if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3278.               }
  3279.               const wcController = contensWillChangeController;
  3280.               cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3281.               wcController && wcController.beforeOper();
  3282.               await Promise.resolve();
  3283.               const acItems = cnt.activeItems_;
  3284.               const len1 = acItems.length;
  3285.               if (!len1) console.warn('cnt.activeItems_.length = 0');
  3286.               let waitFor = [];
  3287.  
  3288.  
  3289.               /** @type {Set<string>} */
  3290.               const imageLinks = new Set();
  3291.  
  3292.               if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3293.                 for (const item of acItems) {
  3294.                   fixLiveChatItem(item, imageLinks);
  3295.                 }
  3296.               }
  3297.               if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3298.                 if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3299.                 if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3300.  
  3301.                 // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3302.                 const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3303.                 // preload performs the high priority fetching.
  3304.                 // prefetch delays the chat display if the video resoruce is demanding.
  3305.  
  3306.                 if (rel) {
  3307.  
  3308.                   imageLinks.forEach(imageLink => {
  3309.                     let d = false;
  3310.                     const isEmoji = imageLink.includes('/emoji/');
  3311.                     const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3312.                     if (!pretechedSet.has(imageLink)) {
  3313.                       pretechedSet.add(imageLink);
  3314.                       d = true;
  3315.                     }
  3316.                     if (d) {
  3317.                       waitFor.push(linker(null, rel, imageLink, 'image'));
  3318.  
  3319.                     }
  3320.                   })
  3321.  
  3322.                 }
  3323.  
  3324.               }
  3325.  
  3326.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3327.               // console.log('ss1', Date.now())
  3328.               if (waitFor.length > 0) {
  3329.                 await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3330.               }
  3331.               waitFor.length = 0;
  3332.               waitFor = null;
  3333.               // console.log('ss2', Date.now())
  3334.               cnt.flushActiveItems66_();
  3335.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3336.               const len2 = cnt.activeItems_.length;
  3337.               const bAsync = len1 !== len2;
  3338.               await Promise.resolve();
  3339.               if (wcController) {
  3340.                 if (bAsync) {
  3341.                   cnt.async(() => {
  3342.                     wcController.afterOper();
  3343.                   });
  3344.                 } else {
  3345.                   wcController.afterOper();
  3346.                 }
  3347.               }
  3348.               if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3349.                 this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3350.  
  3351.                 logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3352.                 //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3353.               } else if (changeMaxItemsToDisplay) {
  3354.  
  3355.                 logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3356.                   maxItemsToDisplay: this.data.maxItemsToDisplay,
  3357.                   reducedMaxItemsToDisplay,
  3358.                   originalMaxItemsToDisplay: tmpMaxItemsCount
  3359.                 });
  3360.               }
  3361.               logger && console.log('[End]')
  3362.  
  3363.               logger && console.groupEnd();
  3364.  
  3365.               if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3366.  
  3367.  
  3368.                 const ff = () => {
  3369.  
  3370.                   if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3371.                   //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3372.                   if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3373.                     cnt.scrollToBottom_();
  3374.  
  3375.                     Promise.resolve().then(() => {
  3376.  
  3377.                       if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3378.                       if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3379.                     });
  3380.  
  3381.  
  3382.                   }
  3383.                 }
  3384.  
  3385.                 ff();
  3386.  
  3387.  
  3388.                 Promise.resolve().then(ff);
  3389.  
  3390.                 // requestAnimationFrame(ff);
  3391.               } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3392.  
  3393.                 const knt = cnt;
  3394.                 if (!scrollChatFn) {
  3395.                   const cnt = knt;
  3396.                   const f = () => {
  3397.                     const itemScroller = cnt.itemScroller;
  3398.                     if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3399.                     if (!cnt.atBottom) {
  3400.                       cnt.scrollToBottom_();
  3401.                     } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3402.                       itemScroller.scrollTop = itemScroller.scrollHeight;
  3403.                     }
  3404.                   };
  3405.                   scrollChatFn = () => Promise.resolve().then(f).then(f);
  3406.                 }
  3407.  
  3408.                 if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3409.               }
  3410.  
  3411.               return 1;
  3412.  
  3413.  
  3414.             } catch (e) {
  3415.               console.warn(e);
  3416.             }
  3417.           }
  3418.  
  3419.           mclp.flushActiveItems77_ = function () {
  3420.  
  3421.             return new Promise(resResolve => {
  3422.               try {
  3423.                 const cnt = this;
  3424.                 if (mlf > 1e9) mlf = 9;
  3425.                 let tid = ++mlf;
  3426.                 const hostElement = cnt.hostElement || cnt;
  3427.                 if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3428.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3429.  
  3430.                 // 4 times to maxItems to avoid frequent trimming.
  3431.                 // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3432.  
  3433.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3434.                 this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3435.                 if (cnt.canScrollToBottom_()) {
  3436.                   cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3437.                     .then(() => cnt.flushActiveItems78_(tid)) // async function
  3438.                     .then((asyncResult) => {
  3439.                       resResolve(asyncResult); // either undefined or 1
  3440.                       resResolve = null;
  3441.                     }).catch((e) => {
  3442.                       console.warn(e);
  3443.                       if (resResolve) resResolve();
  3444.                     });
  3445.                 } else {
  3446.                   resResolve(2);
  3447.                   resResolve = null;
  3448.                 }
  3449.               } catch (e) {
  3450.                 console.warn(e);
  3451.                 if (resResolve) resResolve();
  3452.               }
  3453.  
  3454.  
  3455.             });
  3456.  
  3457.           }
  3458.  
  3459.           mclp.flushActiveItems_ = function () {
  3460.             const cnt = this;
  3461.  
  3462.             if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3463.  
  3464.             if (cnt.activeItems_.length === 0) {
  3465.               cnt.__intermediate_delay__ = null;
  3466.               return;
  3467.             }
  3468.  
  3469.             const cntData = ((cnt || 0).data || 0);
  3470.             if (cntData.maxItemsToDisplay944 === undefined) {
  3471.               cntData.maxItemsToDisplay944 = null;
  3472.               if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3473.               cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3474.             }
  3475.  
  3476.             // ignore previous __intermediate_delay__ and create a new one
  3477.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3478.               cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3479.                 if (rt === 1) {
  3480.                   resolve(1); // success, scroll to bottom
  3481.                   if (hasMoreMessageState === 1) {
  3482.                     hasMoreMessageState = 0;
  3483.                     const showMore = (cnt.$ || 0)['show-more'];
  3484.                     if (showMore) {
  3485.                       showMore.classList.remove('has-new-messages-miuzp');
  3486.                     }
  3487.                   }
  3488.                 }
  3489.                 else if (rt === 2) {
  3490.                   resolve(2); // success, trim
  3491.                   if (hasMoreMessageState === 0) {
  3492.                     hasMoreMessageState = 1;
  3493.                     const showMore = cnt.$['show-more'];
  3494.                     if (showMore) {
  3495.                       showMore.classList.add('has-new-messages-miuzp');
  3496.                     }
  3497.                   }
  3498.                 }
  3499.                 else resolve(-1); // skip
  3500.               }).catch(e => {
  3501.                 console.warn(e);
  3502.               });
  3503.             });
  3504.  
  3505.           }
  3506.           console.log("flushActiveItems_", "OK");
  3507.         } else {
  3508.           console.log("flushActiveItems_", "NG");
  3509.         }
  3510.  
  3511.         mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3512.           try {
  3513.             if (mlg > 1e9) mlg = 9;
  3514.             const tid = ++mlg;
  3515.             const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3516.             const runCond = () => this.canScrollToBottom_();
  3517.             if (!keepTrialCond()) return;
  3518.             if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3519.             await new Promise(r => setTimeout(r, 80));
  3520.             if (!keepTrialCond()) return;
  3521.             if (runCond()) return this.flushActiveItems_() | 1;
  3522.             await new Promise(requestAnimationFrame);
  3523.             if (runCond()) return this.flushActiveItems_() | 1;
  3524.           } catch (e) {
  3525.             console.warn(e);
  3526.           }
  3527.         }
  3528.  
  3529.         if ((mclp.atBottomChanged_ || 0).length === 1) {
  3530.           // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3531.           assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3532.  
  3533.           const querySelector = HTMLElement.prototype.querySelector;
  3534.           const U = (element) => ({
  3535.             querySelector: (selector) => querySelector.call(element, selector)
  3536.           });
  3537.  
  3538.           let qid = 0;
  3539.           mclp.atBottomChanged_ = function (a) {
  3540.             let tid = ++qid;
  3541.             let b = this;
  3542.             a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3543.               if (tid !== qid) return;
  3544.               U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3545.             }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3546.               this.hideShowMoreAsync_ = null,
  3547.               U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3548.           }
  3549.  
  3550.           console.log("atBottomChanged_", "OK");
  3551.         } else {
  3552.           console.log("atBottomChanged_", "NG");
  3553.         }
  3554.  
  3555.         if ((mclp.onScrollItems_ || 0).length === 1) {
  3556.  
  3557.           assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3558.           mclp.onScrollItems66_ = mclp.onScrollItems_;
  3559.           mclp.onScrollItems77_ = async function (evt) {
  3560.             if (myw > 1e9) myw = 9;
  3561.             let tid = ++myw;
  3562.  
  3563.             await new Promise(requestAnimationFrame);
  3564.  
  3565.             if (tid !== myw) {
  3566.               return;
  3567.             }
  3568.  
  3569.             const cnt = this;
  3570.  
  3571.             await Promise.resolve();
  3572.             if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3573.               await Promise.resolve().then(() => {
  3574.                 this.ytRendererBehavior.onScroll(evt);
  3575.               }).then(() => {
  3576.                 if (this.canScrollToBottom_()) {
  3577.                   const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3578.                   if (hasUserJustInteracted) {
  3579.                     // only when there is an user action
  3580.                     this.setAtBottom();
  3581.                     return 1;
  3582.                   }
  3583.                 } else {
  3584.                   // no message inserting
  3585.                   this.setAtBottom();
  3586.                   return 1;
  3587.                 }
  3588.               }).then((r) => {
  3589.  
  3590.                 if (this.activeItems_.length) {
  3591.  
  3592.                   if (this.canScrollToBottom_()) {
  3593.                     this.flushActiveItems_();
  3594.                     return 1 && r;
  3595.                   } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3596.                     // delayed due to user action
  3597.                     this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3598.                     return 0;
  3599.                   }
  3600.                 }
  3601.               }).then((r) => {
  3602.                 if (r) {
  3603.                   // ensure setAtBottom is correctly set
  3604.                   this.setAtBottom();
  3605.                 }
  3606.               });
  3607.             } else {
  3608.               cnt.onScrollItems66_(evt);
  3609.             }
  3610.  
  3611.             await Promise.resolve();
  3612.  
  3613.           }
  3614.  
  3615.           mclp.onScrollItems_ = function (evt) {
  3616.  
  3617.             const cnt = this;
  3618.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3619.               cnt.onScrollItems77_(evt).then(() => {
  3620.                 resolve();
  3621.               });
  3622.             });
  3623.           }
  3624.           console.log("onScrollItems_", "OK");
  3625.         } else {
  3626.           console.log("onScrollItems_", "NG");
  3627.         }
  3628.  
  3629.         if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3630.  
  3631.           assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3632.           mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3633.  
  3634.           mclp.handleLiveChatActions77_ = async function (arr) {
  3635.             if (typeof (arr || 0).length !== 'number') {
  3636.               this.handleLiveChatActions66_(arr);
  3637.               return;
  3638.             }
  3639.             if (mzt > 1e9) mzt = 9;
  3640.             let tid = ++mzt;
  3641.  
  3642.             if (zarr === null) zarr = arr;
  3643.             else Array.prototype.push.apply(zarr, arr);
  3644.             arr = null;
  3645.  
  3646.             await new Promise(requestAnimationFrame);
  3647.  
  3648.             if (tid !== mzt || zarr === null) {
  3649.               return;
  3650.             }
  3651.  
  3652.             const carr = zarr;
  3653.             zarr = null;
  3654.  
  3655.             await Promise.resolve();
  3656.             this.handleLiveChatActions66_(carr);
  3657.             await Promise.resolve();
  3658.  
  3659.           }
  3660.  
  3661.           mclp.handleLiveChatActions_ = function (arr) {
  3662.  
  3663.             const cnt = this;
  3664.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3665.               cnt.handleLiveChatActions77_(arr).then(() => {
  3666.                 resolve();
  3667.               });
  3668.             });
  3669.           }
  3670.           console.log("handleLiveChatActions_", "OK");
  3671.         } else {
  3672.           console.log("handleLiveChatActions_", "NG");
  3673.         }
  3674.  
  3675.         mclp.hasUserJustInteracted11_ = () => {
  3676.           const t = dateNow();
  3677.           return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3678.         }
  3679.  
  3680.         if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3681.  
  3682.           assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3683.  
  3684.           mclp.canScrollToBottom_ = function () {
  3685.             return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3686.           }
  3687.  
  3688.           console.log("canScrollToBottom_", "OK");
  3689.         } else {
  3690.           console.log("canScrollToBottom_", "NG");
  3691.         }
  3692.  
  3693.         if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3694.  
  3695.           mclp.isSmoothScrollEnabled_ = function () {
  3696.             return false;
  3697.           }
  3698.  
  3699.           mclp.maybeResizeScrollContainer_ = function () {
  3700.             //
  3701.           }
  3702.  
  3703.           mclp.refreshOffsetContainerHeight_ = function () {
  3704.             //
  3705.           }
  3706.  
  3707.           mclp.smoothScroll_ = function () {
  3708.             //
  3709.           }
  3710.  
  3711.           mclp.resetSmoothScroll_ = function () {
  3712.             //
  3713.           }
  3714.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3715.         } else {
  3716.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3717.         }
  3718.  
  3719.         if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3720.  
  3721.           mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3722.           mclp.handleAddChatItemAction_ = function (a) {
  3723.             try {
  3724.               if (a && typeof a === 'object' && !('length' in a)) {
  3725.                 fixLiveChatItem(a.item, null);
  3726.                 console.assert(arguments[0] === a);
  3727.               }
  3728.             } catch (e) { console.warn(e) }
  3729.             return this.handleAddChatItemAction66_.apply(this, arguments);
  3730.           }
  3731.  
  3732.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3733.         } else {
  3734.  
  3735.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3736.         }
  3737.  
  3738.  
  3739.         if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3740.  
  3741.           mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3742.           mclp.handleReplaceChatItemAction_ = function (a) {
  3743.             try {
  3744.               if (a && typeof a === 'object' && !('length' in a)) {
  3745.                 fixLiveChatItem(a.replacementItem, null);
  3746.                 console.assert(arguments[0] === a);
  3747.               }
  3748.             } catch (e) { console.warn(e) }
  3749.             return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3750.           }
  3751.  
  3752.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3753.         } else {
  3754.  
  3755.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3756.         }
  3757.  
  3758.         console.log("[End]");
  3759.         console.groupEnd();
  3760.  
  3761.       }).catch(console.warn);
  3762.  
  3763.  
  3764.       const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3765.  
  3766.         let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3767.  
  3768.         if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3769.  
  3770.           // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3771.           let v = `${attrValue}`;
  3772.           // conside a ticker is 101px width
  3773.           // 1% = 1.01px
  3774.           // 0.2% = 0.202px
  3775.  
  3776.  
  3777.           const ratio1 = (yd.ratio * 100);
  3778.           if (ratio1 > -1) { // avoid NaN
  3779.  
  3780.             // countdownDurationMs
  3781.             // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3782.             // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3783.             // 150000 - 1%    <1% = 1.5s>
  3784.             // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3785.             // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3786.  
  3787.             // 99px * 5% = 4.95px
  3788.  
  3789.             // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3790.  
  3791.  
  3792.             // 1% Duration
  3793.  
  3794.             let ratio2 = ratio1;
  3795.  
  3796.             const ydd = yd.data;
  3797.             if (ydd) {
  3798.  
  3799.               const d1 = ydd.durationSec;
  3800.               const d2 = ydd.fullDurationSec;
  3801.  
  3802.               // @ step timing [min. 0.2%]
  3803.               let numOfSteps = 500;
  3804.               if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3805.                 if (d2 > 400) numOfSteps = 500; // 0.2%
  3806.                 else if (d2 > 200) numOfSteps = 200; // 0.5%
  3807.                 else if (d2 > 100) numOfSteps = 100; // 1%
  3808.                 else if (d2 > 50) numOfSteps = 50; // 2%
  3809.                 else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3810.                 else numOfSteps = 20;
  3811.               }
  3812.               if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3813.               if (numOfSteps < 5) numOfSteps = 5;
  3814.  
  3815.               const rd = numOfSteps / 100.0;
  3816.  
  3817.               ratio2 = Math.round(ratio2 * rd) / rd;
  3818.  
  3819.               // ratio2 = Math.round(ratio2 * 5) / 5;
  3820.               ratio2 = ratio2.toFixed(1);
  3821.               v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3822.  
  3823.               if (yd.__style_last__ === v) return;
  3824.               yd.__style_last__ = v;
  3825.               // do not consider any delay here.
  3826.               // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3827.  
  3828.             }
  3829.           }
  3830.  
  3831.           HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3832.  
  3833.  
  3834.         } else {
  3835.           HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3836.         }
  3837.  
  3838.       };
  3839.  
  3840.  
  3841.       const fpTicker = (renderer) => {
  3842.         const cnt = renderer.inst || renderer;
  3843.         assertor(() => typeof (cnt || 0).is === 'string');
  3844.         assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3845.         const container = (cnt.$ || 0).container;
  3846.         if (container) {
  3847.           assertor(() => (container || 0).nodeType === 1);
  3848.           assertor(() => typeof container.setAttribute === 'function');
  3849.           container.setAttribute = tickerContainerSetAttribute;
  3850.         } else {
  3851.           console.warn(`"container" does not exist in ${cnt.is}`);
  3852.         }
  3853.       };
  3854.  
  3855.  
  3856.       const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3857.         "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3858.  
  3859.  
  3860.       Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3861.  
  3862.         mightFirstCheckOnYtInit();
  3863.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3864.         console.log("[Begin]");
  3865.  
  3866.         // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3867.         let isMainVideoOngoing = null;
  3868.         let mainVideoLastProgress = null;
  3869.         // << end >>
  3870.  
  3871.         for (const tag of tags) {
  3872.           const dummy = document.createElement(tag);
  3873.  
  3874.           const cProto = getProto(dummy);
  3875.           if (!cProto || !cProto.attached) {
  3876.             console.warn(`proto.attached for ${tag} is unavailable.`);
  3877.             continue;
  3878.           }
  3879.  
  3880.           cProto.attached77 = cProto.attached;
  3881.  
  3882.           cProto.attached = function () {
  3883.             fpTicker(this.hostElement || this);
  3884.             return this.attached77();
  3885.           }
  3886.  
  3887.           for (const elm of document.getElementsByTagName(tag)) {
  3888.             if ((elm || elm.inst).isAttached === true) {
  3889.               fpTicker(elm);
  3890.             }
  3891.           }
  3892.  
  3893.  
  3894.           let rafHackState = 0;
  3895.  
  3896.           let isTimingFunctionHackable = false;
  3897.  
  3898.           let urt = 0;
  3899.  
  3900.           if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3901.  
  3902.             // console.log('startCountdown', typeof cProto.startCountdown)
  3903.             // console.log('updateTimeout', typeof cProto.updateTimeout)
  3904.             // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3905.  
  3906.             isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3907.  
  3908.           } else {
  3909.             console.log(`Skip Timing Function Modification for ${tag}`);
  3910.             continue;
  3911.           }
  3912.  
  3913.  
  3914.           if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3915.  
  3916.             // cancelable - this.rafId < isAnimationPausedChanged >
  3917.             rafHackState = 1;
  3918.  
  3919.             if (isTimingFunctionHackable) {
  3920.               rafHackState = 2;
  3921.  
  3922.             } else {
  3923.               rafHackState = 4;
  3924.             }
  3925.  
  3926.           }
  3927.  
  3928.           const isCSSPropertySupported = () => {
  3929.  
  3930.             if (typeof CSS !== 'object' || typeof (CSS || 0).registerProperty !== 'function') return;
  3931.             const documentElement = document.documentElement;
  3932.             if (!documentElement) {
  3933.               console.warn('document.documentElement is not found');
  3934.               return false;
  3935.             }
  3936.             if (`${window.getComputedStyle(documentElement).getPropertyValue('--ticker-rtime')}`.length === 0) {
  3937.               return false;
  3938.             }
  3939.             return true;
  3940.  
  3941.           };
  3942.  
  3943.           const doAnimator = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && isCSSPropertySupported();
  3944.  
  3945.           const doRAFHack = rafHackState === 2;
  3946.  
  3947.           cProto._throwOut = function () {
  3948.             this._r782 = 1;
  3949.             Promise.resolve().then(() => {
  3950.               if (typeof this.requestRemoval === 'function') {
  3951.                 const id = (this.data || 0).id;
  3952.                 if (!id) this.data = { id: 1 };
  3953.                 try {
  3954.                   this.requestRemoval();
  3955.                 } catch (e) { }
  3956.               }
  3957.               this.detached();
  3958.               this.data = null;
  3959.               this.countdownMs = 0;
  3960.               this.lastCountdownTimeMs = null;
  3961.               if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  3962.               if (this.__dataEnabled === true) this.__dataEnabled = false;
  3963.               if (this.__dataReady === true) this.__dataReady = false;
  3964.               const hm = this.hostElement || this;
  3965.               if (hm.parentNode) hm.remove();
  3966.               if (hm.firstChild) hm.textContent = '';
  3967.             }).catch(e => {
  3968.               console.warn(e);
  3969.             });
  3970.           };
  3971.  
  3972.           // cProto._checkTickerBackgroundChanged = doAnimator ? function () {
  3973.           //   if (runTickerClassName === 'run-ticker') {
  3974.           //     const container = (this.$ || 0).container || 0;
  3975.           //     if (!container) return;
  3976.           //     container.classList.add('run-ticker-test');
  3977.           //     const evaluated = `${window.getComputedStyle(container).background}`;
  3978.           //     container.classList.remove('run-ticker-test');
  3979.           //     if (evaluated.indexOf('0.') < 4) {
  3980.           //       // not fulfilling
  3981.           //       // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  3982.           //       runTickerClassName = 'run-ticker-forced';
  3983.           //       console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3984.           //         "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3985.           //         "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3986.           //       );
  3987.           //       console.warn(`%cWarning:\n\tYou might have added a userscript or extension that hacks ticker background too.\n\tYouTube Super Fast Chat will override it for you.`, 'color: #bada55');
  3988.           //       console.groupEnd();
  3989.           //     }
  3990.           //   }
  3991.           // } : null;
  3992.  
  3993.           cProto._makeAnimator = doAnimator ? function () {
  3994.             if (this._r782) return;
  3995.             // if (!this.isAttached) return;
  3996.             if (!this._runnerAE) {
  3997.               const aElement = (this.$ || 0).container;
  3998.               if (!aElement) return console.warn("this.$.container is undefined");
  3999.               const da = this.data;
  4000.               if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  4001.               const c1 = this.colorFromDecimal(da.startBackgroundColor);
  4002.               const c2 = this.colorFromDecimal(da.endBackgroundColor);
  4003.               if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  4004.  
  4005.               // if (!this.__tickerBackgroundInitialChecked__) {
  4006.               //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  4007.               //   console.log('__tickerBackgroundInitialChecked__')
  4008.               //   this._checkTickerBackgroundChanged();
  4009.               // }
  4010.  
  4011.               aElement.style.setProperty('--ticker-c1', c1);
  4012.               aElement.style.setProperty('--ticker-c2', c2);
  4013.               aElement.classList.add(runTickerClassName);
  4014.               const p = (this.countdownMs / this.countdownDurationMs) * 100;
  4015.               // this._aeStartV = this.countdownMs;
  4016.               // this._aeStartT = this.countdownDurationMs;
  4017.               if (!(p >= 0 && p <= 100)) {
  4018.                 console.warn('incorrect time ratio', p);
  4019.               } else {
  4020.                 /*
  4021.                 const u0 = p.toFixed(4) + '%';
  4022.                 this._runnerAE = animate.call(aElement,
  4023.                   [
  4024.                     { '--ticker-rtime': u0 },
  4025.                     { '--ticker-rtime': '0%' }
  4026.                   ]
  4027.                   ,
  4028.                   {
  4029.                     fill: "forwards",
  4030.                     duration: this.countdownMs,
  4031.                     easing: "linear"
  4032.                   }
  4033.                 );
  4034.                 */
  4035.  
  4036.                 let timingFn = 'linear';
  4037.  
  4038.                 const totalDuration = this.countdownDurationMs;
  4039.  
  4040.                 if (ATTEMPT_ANIMATED_TICKER_BACKGROUND === 'steps') {
  4041.  
  4042.                   // @ step timing [min. 0.2%]
  4043.                   let stepInterval = 0.2; // unit: %
  4044.                   if (totalDuration > 400000) stepInterval = 0.2;
  4045.                   else if (totalDuration > 200000) stepInterval = 0.5;
  4046.                   else if (totalDuration > 100000) stepInterval = 1;
  4047.                   else if (totalDuration > 50000) stepInterval = 2;
  4048.                   else if (totalDuration > 25000) stepInterval = 5;
  4049.                   else stepInterval = 5;
  4050.  
  4051.                   let numOfSteps = Math.round(100 / stepInterval);
  4052.  
  4053.                   if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  4054.                   if (numOfSteps < 5) numOfSteps = 5;
  4055.  
  4056.                   timingFn = `steps(${numOfSteps}, end)`;
  4057.  
  4058.                 }
  4059.  
  4060.  
  4061.                 const ae = animate.call(aElement,
  4062.                   [
  4063.                     { '--ticker-rtime': '100%' },
  4064.                     { '--ticker-rtime': '0%' }
  4065.                   ]
  4066.                   ,
  4067.                   {
  4068.                     fill: "forwards",
  4069.                     duration: totalDuration,
  4070.                     easing: timingFn
  4071.                   }
  4072.                 );
  4073.  
  4074.                 this._runnerAE = ae;
  4075.  
  4076.                 ae.onfinish = () => {
  4077.                   this.onfinish = null;
  4078.                   if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  4079.                     this._aeFinished();
  4080.                   }
  4081.                 }
  4082.  
  4083.                 let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  4084.  
  4085.                 if (bq >= 0 && bq <= totalDuration) {
  4086.  
  4087.                   if (bq > totalDuration - 1) {
  4088.                     ae.currentTime = bq;
  4089.                     // setTimeout(() => {
  4090.                     //   if (this._runnerAE === ae && ae.onfinish) ae.onfinish();
  4091.                     // }, 1);
  4092.                   } else {
  4093.                     ae.currentTime = bq;
  4094.                   }
  4095.                 } else {
  4096.                   console.warn('Error on setting _runnerAE.currentTime!');
  4097.                 }
  4098.  
  4099.  
  4100.                 aeConstructor = ae.constructor; // constructor is from iframe
  4101.                 return ae;
  4102.               }
  4103.             } else {
  4104.               if (!aeConstructor) return console.warn('aeConstructor is undefined');
  4105.               // assume just time update
  4106.               const ae = this._runnerAE;
  4107.               if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  4108.               if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  4109.               let p = (this.countdownMs / this.countdownDurationMs) * 100;
  4110.               if (!(p >= 0 && p <= 100)) {
  4111.                 console.warn('incorrect time ratio', p);
  4112.               } else {
  4113.                 // let u0 = p.toFixed(4) + '%'
  4114.                 /*
  4115.                 ae.effect.setKeyframes([
  4116.                   { '--ticker-rtime': u0 },
  4117.                   { '--ticker-rtime': '0%' }
  4118.                 ]);
  4119.                 ae.effect.updateTiming({ duration: this.countdownMs });
  4120.                 */
  4121.                 // ae.currentTime = 0;
  4122.  
  4123.  
  4124.  
  4125.                 let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  4126.                 if (bq >= 0 && bq <= this.countdownDurationMs) {
  4127.  
  4128.                   this._runnerAE.currentTime = bq
  4129.                 } else {
  4130.                   console.warn('Error on setting _runnerAE.currentTime!');
  4131.                 }
  4132.  
  4133.  
  4134.                 ae.play();
  4135.                 return ae;
  4136.               }
  4137.             }
  4138.           } : null;
  4139.  
  4140.           cProto._aeFinished = doAnimator ? function () {
  4141.  
  4142.             if (this._r782) return;
  4143.  
  4144.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4145.               this._throwOut();
  4146.               return;
  4147.             }
  4148.  
  4149.             if (doAnimator) {
  4150.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4151.  
  4152.               let lc = window.performance.now();
  4153.               this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4154.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4155.               this.lastCountdownTimeMs = lc;
  4156.               if (this.countdownMs > 10) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs); // just warning.
  4157.  
  4158.               this.countdownMs = 0;
  4159.               this.lastCountdownTimeMs = null;
  4160.  
  4161.               if (this.isAttached) {
  4162.                 let fastRemoved = false;
  4163.                 if (Date.now() - windowShownAt < 80 && typeof this.requestRemoval === 'function') {
  4164.                   // no animation if the video page is switched from background to foreground
  4165.                   // this.hostElement.style.display = 'none';
  4166.                   const id = (this.data || 0).id || 0;
  4167.                   if (!id) this.data = { id: 1 }
  4168.                   try {
  4169.                     this.requestRemoval();
  4170.                     fastRemoved = true;
  4171.                   } catch (e) {
  4172.  
  4173.                   }
  4174.                 }
  4175.  
  4176.                 if (!fastRemoved) {
  4177.                   "auto" === this.hostElement.style.width && this.setContainerWidth();
  4178.                   this.slideDown();
  4179.                 }
  4180.               }
  4181.  
  4182.  
  4183.             } else {
  4184.               console.warn('unexpected issue')
  4185.             }
  4186.           } : null;
  4187.  
  4188.  
  4189.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  4190.  
  4191.             if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  4192.               urt++;
  4193.               assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  4194.               cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  4195.               cProto.handlePauseReplay = function () {
  4196.                 if (this.isAttached) {
  4197.  
  4198.                   if (pairForPauseResumeM === 0) {
  4199.                     pairForPauseResume++;
  4200.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4201.                   }
  4202.                   // console.log('handlePauseReplay');
  4203.                   // console.log('handlePauseReplay', pairForPauseResume);
  4204.                   const r = this.handlePauseReplay66.apply(this, arguments);
  4205.                   isMainVideoOngoing = false;
  4206.                   return r;
  4207.                 }
  4208.               };
  4209.             } else {
  4210.               console.log('Error for setting cProto.handlePauseReplay', tag)
  4211.             }
  4212.  
  4213.             if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4214.               urt++;
  4215.               assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4216.               cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4217.               cProto.handleResumeReplay = function () {
  4218.                 if (this.isAttached) {
  4219.  
  4220.                   if (pairForPauseResumeM === 0) {
  4221.                     pairForPauseResume++;
  4222.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4223.                   }
  4224.                   // console.log('handleResumeReplay');
  4225.                   // console.log('handleResumeReplay', pairForPauseResume);
  4226.                   const r = this.handleResumeReplay66.apply(this, arguments);
  4227.                   isMainVideoOngoing = true;
  4228.                   return r;
  4229.  
  4230.                 }
  4231.               };
  4232.             } else {
  4233.               console.log('Error for setting cProto.handleResumeReplay', tag)
  4234.             }
  4235.  
  4236.             if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4237.               urt++;
  4238.               assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4239.               cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4240.               cProto.handleReplayProgress = function (a) {
  4241.                 if (this.isAttached) {
  4242.                   const p = mainVideoLastProgress;
  4243.                   mainVideoLastProgress = a;
  4244.                   if (isMainVideoOngoing === false) { // ignore isMainVideoOngoing === null ?
  4245.                     const d = a - p;
  4246.                     if (d > 0 && d < 0.28) isMainVideoOngoing = true; // timeupdate
  4247.                     // 0.28 is due to
  4248.                     //    - most browsers will fire the timeupdate event between 4 to 60 times per second
  4249.                     //    - i.e. timeupdate roughly every 15-250 milliseconds
  4250.                   }
  4251.                   let promiseResult = null;
  4252.                   if (this.isAnimationPaused) {
  4253.                     // unstable state for isMainVideoOngoing; delay required
  4254.                     // all the tickers' handleReplayProgress are executed in the same microtask
  4255.                     // execute after result returned
  4256.                     const lz1 = pairForPauseResume;
  4257.                     Promise.resolve().then(() => {
  4258.                       return promiseResult
  4259.                     }).then(() => {
  4260.  
  4261.  
  4262.                       if (isMainVideoOngoing === true && this.isAnimationPaused) {
  4263.                         const lz2 = pairForPauseResume;
  4264.                         // console.log( 10044000, lz1, lz2 , mainVideoLastProgress - a, isMainVideoOngoing  )
  4265.                         if (lz1 === lz2 && mainVideoLastProgress !== null && mainVideoLastProgress - a >= -1e-5) this.isAnimationPaused = false; // trigger isAnimationPausedChanged
  4266.                       }
  4267.  
  4268.                     });
  4269.                   }
  4270.  
  4271.                   const lq1 = pairForPauseResume;
  4272.                   promiseResult = Promise.resolve().then(() => {
  4273.                     const lq2 = pairForPauseResume;
  4274.  
  4275.                     if (lq1 === lq2) {
  4276.                       this.handleReplayProgress66(a);
  4277.                     }
  4278.  
  4279.  
  4280.                   })
  4281.  
  4282.                 }
  4283.               };
  4284.             } else {
  4285.               console.log('Error for setting cProto.handleReplayProgress', tag)
  4286.             }
  4287.  
  4288.           }
  4289.  
  4290.           const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4291.  
  4292.           const doTimerFnModification = (doRAFHack || doAnimator);
  4293.  
  4294.           let windowShownAt = 0;
  4295.           if (doTimerFnModification) {
  4296.  
  4297.             window.addEventListener('visibilitychange', () => {
  4298.               if (document.visibilityState === 'visible') windowShownAt = Date.now();
  4299.               else windowShownAt = 0;
  4300.             }, false);
  4301.  
  4302.           }
  4303.  
  4304.           cProto.startCountdown = doTimerFnModification ? function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4305.  
  4306.             // a.durationSec [s] => countdownMs [ms]
  4307.             // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4308.             // lastCountdownTimeMs => raf ongoing
  4309.             // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4310.  
  4311.             if (this._r782) return;
  4312.  
  4313.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4314.               this._throwOut();
  4315.               return;
  4316.             }
  4317.  
  4318.             if (doAnimator) {
  4319.               b = void 0 === b ? 0 : b;
  4320.               if (void 0 !== a) {
  4321.                 this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4322.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4323.                 if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4324.                   this.lastCountdownTimeMs = performance.now()
  4325.                   this.rafId = 1
  4326.                   if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4327.                   this.detlaSincePausedSecs = 0;
  4328.                   const ae = this._makeAnimator();
  4329.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4330.  
  4331.                   // console.log(539, isMainVideoOngoing)
  4332.                   if (this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4333.                     // << This is mainly for [PlayBack Replay] backwards >>
  4334.                     // fix the case when the main video is paused but due to seeking the tickers are added
  4335.                     // play first then pause immediately to allow the visual effect of initial state
  4336.                     // don't forget to set the "playerProgressSec"
  4337.                     // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4338.                     this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4339.                     this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4340.                     this.detlaSincePausedSecs = 0;
  4341.                     this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4342.                   }
  4343.                 }
  4344.               }
  4345.             } else {
  4346.               // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4347.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4348.               b = void 0 === b ? 0 : b;
  4349.               void 0 !== a && (this.countdownMs = 1E3 * a,
  4350.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4351.                 this.ratio = 1,
  4352.                 this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  4353.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4354.             }
  4355.  
  4356.           } : cProto.startCountdown;
  4357.  
  4358.           cProto.updateTimeout = doTimerFnModification ? function (a) {
  4359.  
  4360.             if (this._r782) return;
  4361.  
  4362.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4363.               this._throwOut();
  4364.               return;
  4365.             }
  4366.  
  4367.             if (doAnimator) {
  4368.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4369.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4370.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4371.               if (this.isAttached && this.countdownMs) {
  4372.                 this.lastCountdownTimeMs = a
  4373.                 const ae = this._makeAnimator(); // request raf
  4374.                 if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4375.               } else {
  4376.                 (this.lastCountdownTimeMs = null,
  4377.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4378.                     this.slideDown()));
  4379.               }
  4380.             } else {
  4381.               // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4382.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4383.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4384.               this.ratio = this.countdownMs / this.countdownDurationMs;
  4385.               this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4386.                 this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  4387.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4388.                     this.slideDown()))
  4389.             }
  4390.  
  4391.           } : cProto.updateTimeout;
  4392.  
  4393.           // let ez = 0;
  4394.           cProto.isAnimationPausedChanged = doTimerFnModification ? function (a, b) {
  4395.  
  4396.             if (this._r782) return;
  4397.  
  4398.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4399.               this._throwOut();
  4400.               return;
  4401.             }
  4402.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4403.             this._forceNoDetlaSincePausedSecs783 = 0;
  4404.  
  4405.             Promise.resolve().then(() => {
  4406.  
  4407.               if (doAnimator) {
  4408.  
  4409.                 const playState = (this._runnerAE || 0).playState;
  4410.                 if (a && playState === 'running') {
  4411.  
  4412.                 } else if (!a && playState !== 'running' && b) {
  4413.  
  4414.                 } else {
  4415.                   return;
  4416.                 }
  4417.               }
  4418.  
  4419.               // if (Math.abs(this.detlaSincePausedSecs) < 0.01) this.detlaSincePausedSecs = 0;
  4420.               if (doAnimator) {
  4421.                 const pu = () => { // running -> pause
  4422.                   this._runnerAE.pause()
  4423.                   let lc = window.performance.now();
  4424.                   this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4425.                   if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4426.                   this.lastCountdownTimeMs = lc;
  4427.                 };
  4428.                 const wa = () => { // pause -> running
  4429.                   if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4430.                   a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4431.                   this.detlaSincePausedSecs = 0;
  4432.                   this.updateTimeout(a);
  4433.                   this.lastCountdownTimeMs = window.performance.now();
  4434.                 };
  4435.                 a ? (this._runnerAE && pu()) : (!a && b && wa());
  4436.               } else {
  4437.                 // ez++;
  4438.                 // if(ez> 1e9) ez=9;
  4439.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4440.                 a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4441.                   this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4442.                     this.detlaSincePausedSecs = 0),
  4443.                   this.boundUpdateTimeout37_(a),
  4444.                   this.lastCountdownTimeMs = window.performance.now())
  4445.               }
  4446.  
  4447.             }).catch(e => {
  4448.               console.log(e);
  4449.             });
  4450.  
  4451.  
  4452.  
  4453.           } : cProto.isAnimationPausedChanged;
  4454.  
  4455.  
  4456.           if (doAnimator) {
  4457.  
  4458.             assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4459.  
  4460.             let dummyValueForStyleReturn = null;
  4461.  
  4462.             cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4463.             cProto.computeContainerStyle = function (a, b) {
  4464.  
  4465.               if (this._r782) return;
  4466.  
  4467.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4468.                 this._throwOut();
  4469.                 return;
  4470.               }
  4471.  
  4472.               const fullDurationSec = a ? a.fullDurationSec : 0;
  4473.               if (fullDurationSec > 0 && typeof b === 'number') {
  4474.  
  4475.                 // usually zero
  4476.  
  4477.                 // let currentDuationSrc = b * fullDurationSec; // a.durationSec
  4478.  
  4479.                 // console.log(231, fullDurationSec, b, currentDuationSrc, a.durationSec);
  4480.  
  4481.                 /*
  4482.                 if (a.mdsz && typeof a.mdst) return a.mdst;
  4483.                 a.mdsz = 1;
  4484.  
  4485.  
  4486.  
  4487.                 let c1 = this.colorFromDecimal(a.startBackgroundColor);
  4488.                 let c2 = this.colorFromDecimal(a.endBackgroundColor);
  4489.  
  4490.                 let ratio = currentDuationSrc / fullDurationSec;
  4491.  
  4492.                 let m = (ratio * 100).toFixed(1);
  4493.  
  4494.  
  4495.                 let s = `--background:linear-gradient(90deg, ${c1},${c1} ${m}%,${c2} ${m}%,${c2});`
  4496.                 let ro = {
  4497.                   "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4498.                   "implementsGoogStringTypedString": true
  4499.                 };
  4500.  
  4501.                 ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4502.  
  4503.                 a.mdst = s;
  4504.  
  4505.                 return ro;
  4506.                 */
  4507.               }
  4508.  
  4509.  
  4510.  
  4511.               // return this.computeContainerStyle66.apply(this, arguments);
  4512.  
  4513.               if (dummyValueForStyleReturn === null) {
  4514.  
  4515.                 let s = `--nx:82;`
  4516.                 let ro = {
  4517.                   "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4518.                   "implementsGoogStringTypedString": true
  4519.                 };
  4520.  
  4521.                 ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4522.  
  4523.  
  4524.                 dummyValueForStyleReturn = ro;
  4525.  
  4526.  
  4527.               }
  4528.  
  4529.  
  4530.               return dummyValueForStyleReturn;
  4531.  
  4532.  
  4533.             }
  4534.  
  4535.           }
  4536.  
  4537.           if (doTimerFnModification === true) hasTimerModified = true;
  4538.  
  4539.           if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  4540.             console.log('ATTEMPT_ANIMATED_TICKER_BACKGROUND', tag, doAnimator ? 'OK' : 'NG');
  4541.           }
  4542.  
  4543.           if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4544.             console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4545.           }
  4546.  
  4547.         }
  4548.         console.log("[End]");
  4549.         console.groupEnd();
  4550.  
  4551.  
  4552.       }).catch(console.warn);
  4553.  
  4554.       customElements.whenDefined('yt-live-chat-ticker-renderer').then(() => {
  4555.  
  4556.         mightFirstCheckOnYtInit();
  4557.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-renderer hacks");
  4558.         console.log("[Begin]");
  4559.         (() => {
  4560.  
  4561.           const tag = "yt-live-chat-ticker-renderer"
  4562.           const dummy = document.createElement(tag);
  4563.  
  4564.           const cProto = getProto(dummy);
  4565.           if (!cProto || !cProto.attached) {
  4566.             console.warn(`proto.attached for ${tag} is unavailable.`);
  4567.             return;
  4568.           }
  4569.  
  4570.           if (RAF_FIX_keepScrollClamped) {
  4571.  
  4572.             // to be improved
  4573.  
  4574.             if (typeof cProto.keepScrollClamped === 'function' && !cProto.keepScrollClamped72 && fnIntegrity(cProto.keepScrollClamped) === '0.17.10') {
  4575.  
  4576.               cProto.keepScrollClamped72 = cProto.keepScrollClamped;
  4577.               cProto.keepScrollClamped = function () {
  4578.                 this._bound_keepScrollClamped = this._bound_keepScrollClamped || this.keepScrollClamped.bind(this);
  4579.                 this.scrollClampRaf = requestAnimationFrame(this._bound_keepScrollClamped);
  4580.                 this.maybeClampScroll()
  4581.               }
  4582.  
  4583.               console.log('RAF_FIX: keepScrollClamped', tag, "OK")
  4584.             } else {
  4585.  
  4586.               assertor(() => fnIntegrity(cProto.keepScrollClamped, '0.17.10'));
  4587.               console.log('RAF_FIX: keepScrollClamped', tag, "NG")
  4588.             }
  4589.  
  4590.           }
  4591.  
  4592.  
  4593.           if (RAF_FIX_scrollIncrementally && typeof cProto.startScrolling === 'function' && typeof cProto.scrollIncrementally === 'function' && fnIntegrity(cProto.startScrolling) === '1.44.32' && fnIntegrity(cProto.scrollIncrementally) === '1.82.43') {
  4594.             // to be replaced by animator
  4595.  
  4596.             cProto.startScrolling = function (a) {
  4597.               this.scrollStopHandle && this.cancelAsync(this.scrollStopHandle);
  4598.               this.asyncHandle && cancelAnimationFrame(this.asyncHandle);
  4599.               this.lastFrameTimestamp = this.scrollStartTime = performance.now();
  4600.               this.scrollRatePixelsPerSecond = a;
  4601.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4602.               this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally)
  4603.             };
  4604.  
  4605.             cProto.scrollIncrementally = function (a) {
  4606.               var b = a - (this.lastFrameTimestamp || 0);
  4607.               this.$.items.scrollLeft += b / 1E3 * (this.scrollRatePixelsPerSecond || 0);
  4608.               this.maybeClampScroll();
  4609.               this.updateArrows();
  4610.               this.lastFrameTimestamp = a;
  4611.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4612.               0 < this.$.items.scrollLeft || this.scrollRatePixelsPerSecond && 0 < this.scrollRatePixelsPerSecond ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  4613.             };
  4614.  
  4615.             console.log('RAF_FIX: scrollIncrementally', tag, "OK")
  4616.           } else {
  4617.             assertor(() => fnIntegrity(cProto.startScrolling, '1.44.32'));
  4618.             assertor(() => fnIntegrity(cProto.scrollIncrementally, '1.82.43'));
  4619.             console.log('RAF_FIX: scrollIncrementally', tag, "NG")
  4620.           }
  4621.  
  4622.  
  4623.           if (CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED && typeof cProto.attached === 'function' && !cProto.attached37 && typeof cProto.detached === 'function' && !cProto.detached37) {
  4624.  
  4625.             cProto.attached37 = cProto.attached;
  4626.             cProto.detached37 = cProto.detached;
  4627.  
  4628.             let naohzId = 0;
  4629.             cProto.__naohzId__ = 0;
  4630.             cProto.attached = function () {
  4631.               Promise.resolve().then(() => {
  4632.  
  4633.                 const hostElement = this.hostElement || this;
  4634.                 if (!(hostElement instanceof HTMLElement)) return;
  4635.                 if (!HTMLElement.prototype.matches.call(hostElement, '.yt-live-chat-renderer')) return;
  4636.                 const ironPage = HTMLElement.prototype.closest.call(hostElement, 'iron-pages.yt-live-chat-renderer');
  4637.                 // or #chat-messages
  4638.                 if (!ironPage) return;
  4639.                 this.__naohzId__ = ++naohzId;
  4640.                 ironPage.setAttribute('naohz', `${+this.__naohzId__}`);
  4641.  
  4642.                 ironPage.removeEventListener('click', this.messageBoxClickHandlerForFade, {capture: false, passive: true});
  4643.                 ironPage.addEventListener('click', this.messageBoxClickHandlerForFade, {capture: false, passive: true});
  4644.  
  4645.               });
  4646.               return this.attached37.apply(this, arguments);
  4647.             };
  4648.             cProto.detached = function () {
  4649.               Promise.resolve().then(() => {
  4650.  
  4651.                 const ironPage = document.querySelector(`iron-pages[naohz="${+this.__naohzId__}"]`);
  4652.                 if (!ironPage) return;
  4653.  
  4654.                 ironPage.removeEventListener('click', this.messageBoxClickHandlerForFade, {capture: false, passive: true});
  4655.  
  4656.               });
  4657.               return this.detached37.apply(this, arguments);
  4658.             };
  4659.  
  4660.             const clickFade = (p)=>{
  4661.  
  4662.               let u = HTMLElement.prototype.querySelector.call(p, 'yt-live-chat-pinned-message-renderer:not([hidden]) #fade');
  4663.               if (u) u.click();
  4664.             };
  4665.             cProto.messageBoxClickHandlerForFade = async (evt) => {
  4666.  
  4667.               const target = (evt || 0).target || 0;
  4668.               evt = null;
  4669.               if (!target) return;
  4670.  
  4671.               for (let p = target; p instanceof HTMLElement; p = nodeParent(p)) {
  4672.                 const is = p.is;
  4673.                 if (typeof is === 'string' && is) {
  4674.  
  4675.                   if (is === 'iron-pages' || is === 'yt-live-chat-renderer' || is === 'yt-live-chat-app') {
  4676.                     Promise.resolve(p).then(clickFade);
  4677.                     return;
  4678.                   }
  4679.                   if (is.startsWith('yt-live-chat-ticker-')) return;
  4680.                   if (!is.endsWith('-renderer')) return;
  4681.  
  4682.                 } else {
  4683.                   if ((p.nodeName || '').includes('BUTTON')) return;
  4684.                 }
  4685.  
  4686.               }
  4687.             };
  4688.  
  4689.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - OK")
  4690.  
  4691.           } else {
  4692.             console.log("CLOSE_TICKER_PINNED_MESSAGE_WHEN_HEADER_CLICKED - NG")
  4693.           }
  4694.  
  4695.  
  4696.         })();
  4697.  
  4698.         console.log("[End]");
  4699.  
  4700.         console.groupEnd();
  4701.  
  4702.       }).catch(console.warn);
  4703.  
  4704.  
  4705.       if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4706.  
  4707.  
  4708.         customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4709.  
  4710.           mightFirstCheckOnYtInit();
  4711.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4712.           console.log("[Begin]");
  4713.           (() => {
  4714.  
  4715.             const tag = "yt-live-chat-message-input-renderer"
  4716.             const dummy = document.createElement(tag);
  4717.  
  4718.             const cProto = getProto(dummy);
  4719.             if (!cProto || !cProto.attached) {
  4720.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4721.               return;
  4722.             }
  4723.  
  4724.             let doHack = false;
  4725.             if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4726.  
  4727.               // not cancellable
  4728.  
  4729.  
  4730.               doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4731.  
  4732.             }
  4733.  
  4734.             if (doHack) {
  4735.  
  4736.               cProto.handleTimeout = function (a) {
  4737.                 console.log('cProto.handleTimeout', tag)
  4738.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4739.                 this.timeoutDurationMs = this.timeoutMs = a;
  4740.                 this.countdownRatio = 1;
  4741.                 0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4742.               };
  4743.               cProto.updateTimeout = function (a) {
  4744.                 console.log('cProto.updateTimeout', tag)
  4745.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4746.                 this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4747.                   this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4748.                 this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4749.                   rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4750.               };
  4751.  
  4752.               console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4753.             } else {
  4754.  
  4755.               console.log('typeof handleTimeout', typeof cProto.handleTimeout)
  4756.               console.log('typeof updateTimeout', typeof cProto.updateTimeout)
  4757.  
  4758.               console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4759.             }
  4760.  
  4761.           })();
  4762.  
  4763.           console.log("[End]");
  4764.  
  4765.           console.groupEnd();
  4766.  
  4767.  
  4768.         })
  4769.  
  4770.  
  4771.       }
  4772.  
  4773.       if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4774.  
  4775.  
  4776.         customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4777.  
  4778.           mightFirstCheckOnYtInit();
  4779.           groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4780.           console.log("[Begin]");
  4781.           (() => {
  4782.  
  4783.             const tag = "yt-emoji-picker-renderer"
  4784.             const dummy = document.createElement(tag);
  4785.  
  4786.             const cProto = getProto(dummy);
  4787.             if (!cProto || !cProto.attached) {
  4788.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4789.               return;
  4790.             }
  4791.  
  4792.             let doHack = false;
  4793.             if (typeof cProto.animateScroll_ === 'function') {
  4794.  
  4795.               // not cancellable
  4796.               console.log('animateScroll_', typeof cProto.animateScroll_)
  4797.  
  4798.               doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4799.  
  4800.             }
  4801.  
  4802.             if (doHack) {
  4803.  
  4804.               const querySelector = HTMLElement.prototype.querySelector;
  4805.               const U = (element) => ({
  4806.                 querySelector: (selector) => querySelector.call(element, selector)
  4807.               });
  4808.  
  4809.               cProto.animateScroll_ = function (a) {
  4810.                 // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4811.                 if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4812.                 this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4813.                 a -= this.lastAnimationTime_;
  4814.                 200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4815.                   rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4816.                     this.animationEnd_ = this.animationStart_ = null,
  4817.                     this.lastAnimationTime_ = 0);
  4818.                 this.updateButtons_()
  4819.               }
  4820.  
  4821.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  4822.             } else {
  4823.  
  4824.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  4825.             }
  4826.  
  4827.           })();
  4828.  
  4829.           console.log("[End]");
  4830.  
  4831.           console.groupEnd();
  4832.         });
  4833.       }
  4834.  
  4835.       if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  4836.  
  4837.  
  4838.         customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  4839.  
  4840.           mightFirstCheckOnYtInit();
  4841.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  4842.           console.log("[Begin]");
  4843.           (() => {
  4844.  
  4845.             const tag = "yt-live-chat-docked-message"
  4846.             const dummy = document.createElement(tag);
  4847.  
  4848.             const cProto = getProto(dummy);
  4849.             if (!cProto || !cProto.attached) {
  4850.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4851.               return;
  4852.             }
  4853.  
  4854.             let doHack = false;
  4855.             if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  4856.  
  4857.               // cancelable - this.intersectRAF <detached>
  4858.               // yt-live-chat-docked-message
  4859.               // boundCheckIntersections <-> checkIntersections
  4860.               // onDockableMessagesChanged
  4861.               //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  4862.  
  4863.               console.log('detached', typeof cProto.detached)
  4864.               console.log('checkIntersections', typeof cProto.checkIntersections)
  4865.               console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  4866.  
  4867.               doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  4868.  
  4869.             }
  4870.  
  4871.             if (doHack) {
  4872.  
  4873.               cProto.checkIntersections = function () {
  4874.                 // console.log('cProto.checkIntersections', tag)
  4875.                 if (this.dockableMessages.length) {
  4876.                   this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  4877.                   let a = this.dockableMessages[0]
  4878.                     , b = this.hostElement.getBoundingClientRect();
  4879.                   a = a.getBoundingClientRect();
  4880.                   let c = a.top - b.top
  4881.                     , d = 8 >= c;
  4882.                   c = 8 >= c - this.hostElement.clientHeight;
  4883.                   if (d) {
  4884.                     let e;
  4885.                     for (; d;) {
  4886.                       e = this.dockableMessages.shift();
  4887.                       d = this.dockableMessages[0];
  4888.                       if (!d)
  4889.                         break;
  4890.                       d = d.getBoundingClientRect();
  4891.                       c = d.top - b.top;
  4892.                       let f = 8 >= c;
  4893.                       if (8 >= c - a.height)
  4894.                         if (f)
  4895.                           a = d;
  4896.                         else
  4897.                           return;
  4898.                       d = f
  4899.                     }
  4900.                     this.dock(e)
  4901.                   } else
  4902.                     c && this.dockedItem && this.clear()
  4903.                 } else
  4904.                   this.intersectRAF = 0
  4905.               }
  4906.  
  4907.               cProto.onDockableMessagesChanged = function () {
  4908.                 // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  4909.                 this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  4910.               }
  4911.  
  4912.               cProto.detached = function () {
  4913.                 this.intersectRAF && rafHub.cancel(this.intersectRAF)
  4914.               }
  4915.  
  4916.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  4917.             } else {
  4918.  
  4919.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  4920.             }
  4921.  
  4922.           })();
  4923.  
  4924.           console.log("[End]");
  4925.  
  4926.           console.groupEnd();
  4927.  
  4928.         }).catch(console.warn);
  4929.  
  4930.       }
  4931.  
  4932.       if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  4933.  
  4934.  
  4935.         customElements.whenDefined("yt-img-shadow").then(() => {
  4936.  
  4937.           mightFirstCheckOnYtInit();
  4938.           groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  4939.           console.log("[Begin]");
  4940.           (() => {
  4941.  
  4942.             const tag = "yt-img-shadow"
  4943.             const dummy = document.createElement(tag);
  4944.  
  4945.             const cProto = getProto(dummy);
  4946.             if (!cProto || !cProto.attached) {
  4947.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4948.               return;
  4949.             }
  4950.  
  4951.             if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  4952.  
  4953.               cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  4954.               cProto.thumbnailChanged_ = function (a) {
  4955.  
  4956.                 if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  4957.                 if (!this.oldThumbnail_ && !this.thumbnail) return;
  4958.  
  4959.                 return this.thumbnailChanged66_.apply(this, arguments)
  4960.  
  4961.               }
  4962.               console.log("cProto.thumbnailChanged_ - OK");
  4963.  
  4964.             } else {
  4965.               console.log("cProto.thumbnailChanged_ - NG");
  4966.  
  4967.             }
  4968.             if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  4969.  
  4970.               cProto.setSrc66_ = cProto.setSrc_;
  4971.               cProto.setSrc_ = function (a) {
  4972.                 if ((((this || 0).$ || 0).img || 0).src === a) return;
  4973.                 return this.setSrc66_.apply(this, arguments)
  4974.               }
  4975.  
  4976.               console.log("cProto.setSrc_ - OK");
  4977.             } else {
  4978.  
  4979.               console.log("cProto.setSrc_ - NG");
  4980.             }
  4981.  
  4982.           })();
  4983.  
  4984.           console.log("[End]");
  4985.  
  4986.           console.groupEnd();
  4987.  
  4988.         }).catch(console.warn);
  4989.  
  4990.       }
  4991.  
  4992.       if (FIX_THUMBNAIL_DATACHANGED) {
  4993.  
  4994.  
  4995.  
  4996.         customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  4997.  
  4998.           mightFirstCheckOnYtInit();
  4999.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  5000.           console.log("[Begin]");
  5001.           (() => {
  5002.  
  5003.             const tag = "yt-live-chat-author-badge-renderer"
  5004.             const dummy = document.createElement(tag);
  5005.  
  5006.             const cProto = getProto(dummy);
  5007.             if (!cProto || !cProto.attached) {
  5008.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5009.               return;
  5010.             }
  5011.  
  5012.  
  5013.             if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  5014.  
  5015.  
  5016.  
  5017.               cProto.dataChanged86 = cProto.dataChanged;
  5018.               cProto.dataChanged = function (a) {
  5019.  
  5020.                 /*
  5021.  
  5022.                   for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  5023.                       b.removeChild(b.firstChild);
  5024.                   if (a)
  5025.                       if (a.icon) {
  5026.                           var c = document.createElement("yt-icon");
  5027.                           "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  5028.                           c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  5029.                           b.appendChild(c)
  5030.                       } else if (a.customThumbnail) {
  5031.                           c = document.createElement("img");
  5032.                           var d;
  5033.                           (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  5034.                           b.appendChild(c),
  5035.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  5036.                       }
  5037.  
  5038.                 */
  5039.  
  5040.                 const image = ((this || 0).$ || 0).image
  5041.                 if (image && a && image.firstElementChild) {
  5042.                   let exisiting = image.firstElementChild;
  5043.                   if (exisiting === image.lastElementChild) {
  5044.  
  5045.  
  5046.                     if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  5047.  
  5048.                       let c = exisiting;
  5049.                       if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  5050.                         if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  5051.                         if (c.defaultToFilled !== true) c.defaultToFilled = true;
  5052.                       } else {
  5053.                         let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  5054.                         if (c.icon !== p) c.icon = p;
  5055.                         if (c.defaultToFilled !== false) c.defaultToFilled = false;
  5056.                       }
  5057.                       return;
  5058.  
  5059.  
  5060.                     } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  5061.  
  5062.                       let c = exisiting;
  5063.                       if (a.customThumbnail.thumbnails.map(e => e.url).includes(c.src)) {
  5064.  
  5065.                         c.setAttribute("alt", this.hostElement.ariaLabel || "");
  5066.                         return;
  5067.                       }
  5068.                       /*
  5069.  
  5070.                       var d;
  5071.                       (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  5072.  
  5073.  
  5074.                         c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  5075.                         */
  5076.                     }
  5077.  
  5078.  
  5079.                   }
  5080.                 }
  5081.                 return this.dataChanged86.apply(this, arguments)
  5082.  
  5083.               }
  5084.               console.log("cProto.dataChanged - OK");
  5085.  
  5086.             } else {
  5087.               assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  5088.               console.log("cProto.dataChanged - NG");
  5089.  
  5090.             }
  5091.  
  5092.           })();
  5093.  
  5094.           console.log("[End]");
  5095.  
  5096.           console.groupEnd();
  5097.  
  5098.         }).catch(console.warn);
  5099.  
  5100.  
  5101.       }
  5102.  
  5103.  
  5104.       if (FIX_TOOLTIP_DISPLAY) {
  5105.  
  5106.  
  5107.         customElements.whenDefined("tp-yt-paper-tooltip").then(() => {
  5108.  
  5109.           mightFirstCheckOnYtInit();
  5110.           groupCollapsed("YouTube Super Fast Chat", " | tp-yt-paper-tooltip hacks");
  5111.           console.log("[Begin]");
  5112.           (() => {
  5113.  
  5114.             const tag = "tp-yt-paper-tooltip"
  5115.             const dummy = document.createElement(tag);
  5116.  
  5117.             const cProto = getProto(dummy);
  5118.             if (!cProto || !cProto.attached) {
  5119.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5120.               return;
  5121.             }
  5122.  
  5123.             if (typeof cProto.attached === 'function' && typeof cProto.detached === 'function' && cProto._readyClients && cProto._attachDom && cProto.ready && !cProto._readyClients43) {
  5124.  
  5125.               cProto._readyClients43 = cProto._readyClients;
  5126.               cProto._readyClients = function () {
  5127.                 let r = cProto._readyClients43.apply(this, arguments);
  5128.                 if (this.$ && this.$$ && this.$.tooltip) this.root = null; // fix this.root = null != (b = a.root) ? b : this.host
  5129.                 return r;
  5130.               }
  5131.  
  5132.               console.log("_readyClients - OK");
  5133.  
  5134.             } else {
  5135.               console.log("_readyClients - NG");
  5136.  
  5137.             }
  5138.  
  5139.  
  5140.           })();
  5141.  
  5142.           console.log("[End]");
  5143.  
  5144.           console.groupEnd();
  5145.  
  5146.         }).catch(console.warn);
  5147.  
  5148.  
  5149.  
  5150.       }
  5151.  
  5152.  
  5153.  
  5154.       if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK) {
  5155.  
  5156.  
  5157.         const hookDocumentMouseDownSetupFn = () => {
  5158.  
  5159.  
  5160.  
  5161.           let muzTimestamp = 0;
  5162.           let nszDropdown = null;
  5163.  
  5164.  
  5165.  
  5166.           const handlerObject = {
  5167.  
  5168.             // mdHandler282 : function (evt) {
  5169.             //   // console.log(evt, 1, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5170.             //   if (!evt || !evt.isTrusted) return;
  5171.             //   muzTimestamp = 0;
  5172.             //   nszDropdown = null;
  5173.  
  5174.             //   const hostElement = this.hostElement || this;
  5175.             //   if (!evt || !evt.isTrusted || !hostElement.hasAttribute('menu-visible')) return;
  5176.             //   if (!hostElement.contains(evt.target)) return;
  5177.             //   let targetDropDown = null;
  5178.             //   for(const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')){
  5179.             //     if(dropdown && dropdown.positionTarget && hostElement.contains( dropdown.positionTarget)){
  5180.             //       targetDropDown = dropdown;
  5181.             //     }
  5182.             //   }
  5183.             //   if ((nszDropdown = targetDropDown)) {
  5184.             //     muzTimestamp = Date.now();
  5185.             //     evt.stopImmediatePropagation();
  5186.             //     evt.stopPropagation();
  5187.             //   }
  5188.  
  5189.             // },
  5190.  
  5191.  
  5192.             muHandler282: function (evt) {
  5193.               // console.log(evt, 7, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5194.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5195.               const dropdown = nszDropdown;
  5196.               muzTimestamp = 0;
  5197.               nszDropdown = null;
  5198.  
  5199.               const kurMPC = kRef(currentMenuPivotWR) || 0;
  5200.               const hostElement = kurMPC.hostElement || kurMPC;
  5201.               if (!hostElement.hasAttribute('menu-visible')) return;
  5202.               if (dropdown && dropdown.positionTarget && hostElement.contains(dropdown.positionTarget)) {
  5203.                 muzTimestamp = Date.now();
  5204.                 evt.stopImmediatePropagation();
  5205.                 evt.stopPropagation();
  5206.                 Promise.resolve(dropdown).then((dropdown) => {
  5207.                   dropdown.cancel();
  5208.                 });
  5209.                 // document.body.click();
  5210.               }
  5211.  
  5212.             },
  5213.  
  5214.             mlHandler282: function (evt) {
  5215.               muzTimestamp = 0;
  5216.               nszDropdown = null;
  5217.             },
  5218.  
  5219.             ckHandler282: function (evt) {
  5220.               // console.log(evt, 3, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5221.  
  5222.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5223.               if (Date.now() - muzTimestamp < 40) {
  5224.                 muzTimestamp = Date.now();
  5225.                 evt.stopImmediatePropagation();
  5226.                 evt.stopPropagation();
  5227.               }
  5228.  
  5229.             },
  5230.  
  5231.             tapHandler282: function (evt) {
  5232.               // console.log(evt, 2, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5233.  
  5234.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5235.               if (Date.now() - muzTimestamp < 40) {
  5236.                 muzTimestamp = Date.now();
  5237.                 evt.stopImmediatePropagation();
  5238.                 evt.stopPropagation();
  5239.               }
  5240.  
  5241.             },
  5242.  
  5243.  
  5244.             handleEvent(evt) {
  5245.  
  5246.  
  5247.               if (evt) {
  5248.                 const kurMPC = kRef(currentMenuPivotWR) || 0;
  5249.                 const cnt = kurMPC.inst || kurMPC;
  5250.                 const hostElement = cnt.hostElement || cnt;
  5251.                 if (!cnt || cnt.isAttached !== true || hostElement.isConnected !== true) return;
  5252.                 switch (evt.type) {
  5253.                   // case 'mousedown':
  5254.                   // return this.mdHandler282.call(kurMPC, evt);
  5255.                   case 'mouseup':
  5256.                     return this.muHandler282(evt);
  5257.                   case 'mouseleave':
  5258.                     return this.mlHandler282(evt);
  5259.                   case 'tap':
  5260.                     return this.tapHandler282(evt);
  5261.                   case 'click':
  5262.                     return this.ckHandler282(evt);
  5263.                 }
  5264.               }
  5265.  
  5266.             }
  5267.  
  5268.  
  5269.  
  5270.           }
  5271.  
  5272.           document.addEventListener('mousedown', function (evt) {
  5273.  
  5274.             if (!evt || !evt.isTrusted || !evt.target) return;
  5275.             muzTimestamp = 0;
  5276.             nszDropdown = null;
  5277.  
  5278.             /** @type {HTMLElement | null} */
  5279.             const kurMP = kRef(currentMenuPivotWR);
  5280.             if (!kurMP) return;
  5281.             const kurMPC = kurMP.closest('[menu-visible]') || 0;
  5282.  
  5283.             if (!kurMPC.isClickableChatRow111 || !kurMPC.isClickableChatRow111() || !kurMPC.contains(evt.target)) return;
  5284.  
  5285.             let targetDropDown = null;
  5286.             for (const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')) {
  5287.               if (dropdown && dropdown.positionTarget === kurMP) {
  5288.                 targetDropDown = dropdown;
  5289.               }
  5290.             }
  5291.  
  5292.             if ((nszDropdown = targetDropDown)) {
  5293.               muzTimestamp = Date.now();
  5294.               evt.stopImmediatePropagation();
  5295.               evt.stopPropagation();
  5296.               currentMenuPivotWR = mWeakRef(kurMPC);
  5297.  
  5298.               const listenOpts = { capture: true, passive: false, once: true };
  5299.  
  5300.               // remove unexcecuted eventHandler
  5301.               document.removeEventListener('mouseup', handlerObject, listenOpts);
  5302.               document.removeEventListener('mouseleave', handlerObject, listenOpts);
  5303.               document.removeEventListener('tap', handlerObject, listenOpts);
  5304.               document.removeEventListener('click', handlerObject, listenOpts);
  5305.  
  5306.               // inject one time eventHandler to by pass events
  5307.               document.addEventListener('mouseup', handlerObject, listenOpts);
  5308.               document.addEventListener('mouseleave', handlerObject, listenOpts);
  5309.               document.addEventListener('tap', handlerObject, listenOpts);
  5310.               document.addEventListener('click', handlerObject, listenOpts);
  5311.  
  5312.             }
  5313.  
  5314.           }, true);
  5315.  
  5316.         }
  5317.  
  5318.  
  5319.         customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  5320.  
  5321.  
  5322.           mightFirstCheckOnYtInit();
  5323.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-text-message-renderer hacks");
  5324.           console.log("[Begin]");
  5325.           (() => {
  5326.  
  5327.             const tag = "yt-live-chat-text-message-renderer"
  5328.             const dummy = document.createElement(tag);
  5329.  
  5330.             const cProto = getProto(dummy);
  5331.             if (!cProto || !cProto.attached) {
  5332.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5333.               return;
  5334.             }
  5335.  
  5336.             /*
  5337.  
  5338.  
  5339.  
  5340.                 remarks:
  5341.  
  5342.                 const w=new Set();
  5343.                 setInterval(()=>{
  5344.                 for(const a of document.getElementsByTagName('*')) if(a.shouldSupportWholeItemClick) w.add(a.is||'');
  5345.                 console.log([...w.keys()]);
  5346.                 },800);
  5347.  
  5348.  
  5349.                 [
  5350.                 "yt-live-chat-ticker-sponsor-item-renderer",
  5351.                 "yt-live-chat-banner-header-renderer",
  5352.                 "yt-live-chat-text-message-renderer",
  5353.                 "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5354.                 "ytd-sponsorships-live-chat-header-renderer",
  5355.                 "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer"
  5356.                 ]
  5357.  
  5358.             */
  5359.  
  5360.             cProto.isClickableChatRow111 = function () {
  5361.               return (
  5362.                 this.data && typeof this.shouldSupportWholeItemClick === 'function' && typeof this.hasModerationOverlayVisible === 'function' &&
  5363.                 this.data.contextMenuEndpoint && this.wholeMessageClickable && this.shouldSupportWholeItemClick() && !this.hasModerationOverlayVisible()
  5364.               ); // follow .onItemTap(a)
  5365.             }
  5366.  
  5367.  
  5368.  
  5369.             const toHookDocumentMouseDown = typeof cProto.shouldSupportWholeItemClick === 'function' && typeof cProto.hasModerationOverlayVisible === 'function';
  5370.  
  5371.             if (toHookDocumentMouseDown) {
  5372.  
  5373.               hookDocumentMouseDownSetupFn();
  5374.  
  5375.  
  5376.               console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent OK");
  5377.  
  5378.  
  5379.  
  5380.             } else {
  5381.  
  5382.               console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent NG");
  5383.  
  5384.             }
  5385.  
  5386.  
  5387.  
  5388.  
  5389.           })();
  5390.  
  5391.           console.log("[End]");
  5392.  
  5393.           console.groupEnd();
  5394.  
  5395.         }).catch(console.warn);
  5396.  
  5397.  
  5398.       }
  5399.  
  5400.  
  5401.       if (PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN) {
  5402.  
  5403.         document.addEventListener('mousedown', function (evt) {
  5404.  
  5405.           const maxloopDOMTreeElements = 4;
  5406.           const maxloopYtCompontents = 4;
  5407.           let j1 = 0;
  5408.           let j2 = 0;
  5409.           let target = (evt || 0).target || 0;
  5410.           if (!target) return;
  5411.  
  5412.  
  5413.           while (target instanceof HTMLElement) {
  5414.             if (++j1 > maxloopDOMTreeElements) break;
  5415.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') break;
  5416.             target = nodeParent(target);
  5417.           }
  5418.           const components = [];
  5419.           while (target instanceof HTMLElement) {
  5420.             if (++j2 > maxloopYtCompontents) break;
  5421.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') {
  5422.               components.push(target);
  5423.             }
  5424.             if (typeof (target.inst || target).showContextMenu === 'function') break;
  5425.             target = target.parentComponent || (target.inst || 0).parentComponent || null;
  5426.           }
  5427.           if (!(target instanceof HTMLElement)) return;
  5428.           const targetCnt = target.inst || target;
  5429.           if (typeof targetCnt.handleGetContextMenuResponse_ !== 'function' || typeof targetCnt.handleGetContextMenuError !== 'function') {
  5430.             console.log('Error Found: handleGetContextMenuResponse_ OR handleGetContextMenuError is not defined on a component with showContextMenu')
  5431.             return;
  5432.           }
  5433.  
  5434.           const endpoint = (targetCnt.data || 0).contextMenuEndpoint
  5435.           if (!endpoint) return;
  5436.           if (targetCnt.opened || !targetCnt.isAttached) return;
  5437.  
  5438.           if (typeof targetCnt.__cacheResolvedEndpointData__ !== 'function') {
  5439.             console.log(`preRequest for showContextMenu in ${targetCnt.is} is not yet supported.`)
  5440.           }
  5441.  
  5442.           let doPreRequest = false;
  5443.           if (components.length >= 2 && components[0].id === 'menu-button' && (target.$ || 0)['menu-button'] === components[0]) {
  5444.             doPreRequest = true;
  5445.           } else if (components.length === 1 && components[0] === target) {
  5446.             doPreRequest = true;
  5447.           } else if (components.length >= 2 && components[0].id === 'author-photo' && (target.$ || 0)['author-photo'] === components[0]) {
  5448.             doPreRequest = true;
  5449.           }
  5450.           if (doPreRequest === false) {
  5451.             console.log('doPreRequest = fasle on showContextMenu', components);
  5452.             return;
  5453.           }
  5454.  
  5455.           if (targetCnt.__getCachedEndpointData__(endpoint)) return;
  5456.  
  5457.           if (!targetCnt.__showContextMenu_mutex_unlock_isEmpty__()) {
  5458.             console.log('preRequest on showContextMenu aborted due to stacked network request');
  5459.             return;
  5460.           }
  5461.  
  5462.  
  5463.           const onSuccess = (a) => {
  5464.             /*
  5465.  
  5466.               dQ() && (a = a.response);
  5467.               a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && this.showContextMenu_(a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5468.               a.actions && Eu(this.hostElement, "yt-live-chat-actions", [a.actions])
  5469.  
  5470.             */
  5471.  
  5472.             a = a.response || a;
  5473.  
  5474.             if (!a) {
  5475.               console.log('unexpected error in prerequest for showContextMenu.onSuccess');
  5476.               return;
  5477.             }
  5478.  
  5479.             let z = null;
  5480.             a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && (z = a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5481.  
  5482.             if (z) {
  5483.               a = z;
  5484.               targetCnt.__cacheResolvedEndpointData__(endpoint, a, true);
  5485.             }
  5486.  
  5487.           };
  5488.           const onFailure = (a) => {
  5489.  
  5490.             /*
  5491.  
  5492.               if (a instanceof Error || a instanceof Object || a instanceof String)
  5493.                   var b = a;
  5494.               hq(new xm("Error encountered calling GetLiveChatItemContextMenu",b))
  5495.  
  5496.             */
  5497.  
  5498.             targetCnt.__cacheResolvedEndpointData__(endpoint, null);
  5499.             // console.log('onFailure', a)
  5500.  
  5501.           };
  5502.  
  5503.           if (doPreRequest) {
  5504.  
  5505.             let propertyCounter = 0;
  5506.             let p1unlock = null;
  5507.             const p1 = new Promise(r => {
  5508.               p1unlock = r;
  5509.             });
  5510.             const p1Timeout = 800;
  5511.             const proxyKey = '__$$__proxy_to_this__$$__' + Date.now();
  5512.  
  5513.             try {
  5514.  
  5515.               const onSuccessHelperFn = function () {
  5516.                 p1unlock && p1unlock();
  5517.                 p1unlock = null;
  5518.                 if (propertyCounter !== 5) {
  5519.                   console.log('Error in prerequest for showContextMenu.onSuccessHelperFn')
  5520.                   return;
  5521.                 }
  5522.                 if (this[proxyKey] !== targetCnt) {
  5523.                   console.log('Error in prerequest for showContextMenu.this');
  5524.                   return;
  5525.                 }
  5526.                 onSuccess(...arguments);
  5527.               };
  5528.               const onFailureHelperFn = function () {
  5529.                 p1unlock && p1unlock();
  5530.                 p1unlock = null;
  5531.                 if (propertyCounter !== 5) {
  5532.                   console.log('Error in prerequest for showContextMenu.onFailureHelperFn')
  5533.                   return;
  5534.                 }
  5535.                 if (this[proxyKey] !== targetCnt) {
  5536.                   console.log('Error in prerequest for showContextMenu.this');
  5537.                   return;
  5538.                 }
  5539.                 onFailure(...arguments);
  5540.  
  5541.               }
  5542.               const fakeTargetCnt = new Proxy({
  5543.                 __showContextMenu_forceNativeRequest__: 1,
  5544.                 __showContextMenu_sync_mode_request__: 1,
  5545.                 get handleGetContextMenuResponse_() {
  5546.                   propertyCounter += 2;
  5547.                   return onSuccessHelperFn;
  5548.                 },
  5549.                 get handleGetContextMenuError() {
  5550.                   propertyCounter += 3;
  5551.                   return onFailureHelperFn;
  5552.                 }
  5553.               }, {
  5554.                 get(_, key, receiver) {
  5555.                   if (key in _) return _[key];
  5556.                   if (key === proxyKey) return targetCnt;
  5557.  
  5558.                   let giveNative = false;
  5559.                   if (key in targetCnt) {
  5560.                     if (key === 'data') giveNative = true;
  5561.                     else if (typeof targetCnt[key] === 'function') giveNative = true;
  5562.                   }
  5563.                   if (giveNative) return targetCnt[key];
  5564.                 }
  5565.               });
  5566.  
  5567.               const fakeEvent = (() => {
  5568.                 const { target, bubbles, cancelable, cancelBubble, srcElement, timeStamp, defaultPrevented, currentTarget, composed } = evt;
  5569.                 const nf = function () { }
  5570.                 const [stopPropagation, stopImmediatePropagation, preventDefault] = [nf, nf, nf];
  5571.  
  5572.                 return {
  5573.                   type: 'tap',
  5574.                   eventPhase: 0,
  5575.                   isTrusted: false,
  5576.                   __composed: true,
  5577.                   bubbles, cancelable, cancelBubble, timeStamp,
  5578.                   target, srcElement, defaultPrevented, currentTarget, composed,
  5579.                   stopPropagation, stopImmediatePropagation, preventDefault
  5580.                 };
  5581.               })(evt);
  5582.               targetCnt.showContextMenu.call(fakeTargetCnt, fakeEvent);
  5583.  
  5584.  
  5585.             } catch (e) {
  5586.               console.warn(e);
  5587.               propertyCounter = 7;
  5588.  
  5589.             }
  5590.             if (propertyCounter !== 5) {
  5591.               console.log('Error in prerequest for showContextMenu', propertyCounter);
  5592.               return;
  5593.             }
  5594.             targetCnt.__showContextMenu_assign_lock__(p1);
  5595.             setTimeout(() => {
  5596.               p1unlock && p1unlock();
  5597.               p1unlock = null;
  5598.             }, p1Timeout);
  5599.           }
  5600.  
  5601.  
  5602.  
  5603.  
  5604.  
  5605.  
  5606.         }, true);
  5607.  
  5608.  
  5609.       }
  5610.  
  5611.  
  5612.  
  5613.       /*
  5614.  
  5615.       const w=new Set(); for(const a of document.getElementsByTagName('*')) if(a.showContextMenu && a.showContextMenu_) w.add(a.is||''); console.log([...w.keys()])
  5616.  
  5617.       */
  5618.  
  5619.       let pTags = [];
  5620.       const sTags = [
  5621.         "yt-live-chat-ticker-sponsor-item-renderer",
  5622.         "yt-live-chat-banner-header-renderer",
  5623.         "yt-live-chat-text-message-renderer",
  5624.         "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5625.         "ytd-sponsorships-live-chat-header-renderer",
  5626.         "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer"
  5627.       ];
  5628.  
  5629.       for (const tag of sTags) {
  5630.         pTags.push(customElements.whenDefined(tag));
  5631.       }
  5632.  
  5633.  
  5634.       Promise.all(pTags).then(() => {
  5635.  
  5636.  
  5637.         mightFirstCheckOnYtInit();
  5638.         groupCollapsed("YouTube Super Fast Chat", " | fixShowContextMenu");
  5639.         console.log("[Begin]");
  5640.  
  5641.         for (const tag of sTags) {
  5642.  
  5643.  
  5644.  
  5645.           (() => {
  5646.  
  5647.             const dummy = document.createElement(tag);
  5648.  
  5649.             const cProto = getProto(dummy);
  5650.             if (!cProto || !cProto.attached) {
  5651.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5652.               return;
  5653.             }
  5654.  
  5655.  
  5656.  
  5657.  
  5658.             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) {
  5659.  
  5660.               cProto.showContextMenu37_ = cProto.showContextMenu_;
  5661.               cProto.showContextMenu37 = cProto.showContextMenu;
  5662.  
  5663.               function deepCopy(obj, skipKeys) {
  5664.                 skipKeys = skipKeys || [];
  5665.                 if (!obj || typeof obj !== 'object') return obj;
  5666.                 if (Array.isArray(obj)) {
  5667.                   return obj.map(item => deepCopy(item, skipKeys));
  5668.                 }
  5669.                 const copy = {};
  5670.                 for (let key in obj) {
  5671.                   if (!skipKeys.includes(key)) {
  5672.                     copy[key] = deepCopy(obj[key], skipKeys);
  5673.                   }
  5674.                 }
  5675.                 return copy;
  5676.               }
  5677.  
  5678.               /*
  5679.               const wm37 = new WeakMap();
  5680.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5681.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5682.                 if (a) {
  5683.                   if (doDeepCopy) a = deepCopy(a);
  5684.                   wm37.set(endpoint, a);
  5685.                 } else {
  5686.                   wm37.remove(endpoint);
  5687.                 }
  5688.               }
  5689.               cProto.__showContextMenuNetworkRequestMutex__ = null;
  5690.               cProto.__showContextMenuNetworkRequestMutexResolve__  = null;
  5691.               cProto.showContextMenu = function (a) {
  5692.                 if(this.__showContextMenu_forceNativeRequest__){
  5693.                   return this.showContextMenu37(a);
  5694.                 }
  5695.                 const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5696.                 if (!endpoint) {
  5697.                   return this.showContextMenu37(a);
  5698.                 }
  5699.                 this.__showContextMenuNetworkRequestMutex__ = (this.__showContextMenuNetworkRequestMutex__ || Promise.resolve())
  5700.                 .then(()=>new Promise(lockResolve=>{
  5701.  
  5702.                   if (endpoint !== (this.data || 0).contextMenuEndpoint || 0){
  5703.                     lockResolve();
  5704.                     return;
  5705.                   }
  5706.  
  5707.                   if (endpoint) {
  5708.                     let resolvedEndpoint = wm37.get(endpoint);
  5709.                     if (resolvedEndpoint) {
  5710.                       resolvedEndpoint = deepCopy(resolvedEndpoint);
  5711.                       // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5712.                       Promise.resolve(resolvedEndpoint).then(() => {
  5713.                         this.showContextMenu37_(resolvedEndpoint);
  5714.                       });
  5715.                       lockResolve();
  5716.                       return;
  5717.                       //this.showContextMenu37_(JSON.parse(JSON.stringify(a)));
  5718.                       //return;
  5719.                     }
  5720.  
  5721.                     this.__showContextMenuNetworkRequestMutexResolve__ = new Promise(resolve=>{
  5722.                       this.__showContextMenuNetworkRequestMutexResolve__ = resolve;
  5723.  
  5724.                     }).then((a)=>{
  5725.  
  5726.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5727.                   if (endpoint) {
  5728.                     const f = this.__cacheResolvedEndpointData__
  5729.                     if (typeof f === 'function') f(endpoint, a, true);
  5730.                   }
  5731.                    this.showContextMenu37_(a);
  5732.                    lockResolve();
  5733.  
  5734.                     }).catch(console.warn)
  5735.  
  5736.                   }else{
  5737.  
  5738.                     this.__showContextMenuNetworkRequestMutexResolve__ = null;
  5739.                     this.showContextMenu37(a);
  5740.                     lockResolve();
  5741.                   }
  5742.  
  5743.  
  5744.  
  5745.  
  5746.                 })).catch(console.warn);
  5747.               }
  5748.  
  5749.               cProto.showContextMenu_ = function (a) {
  5750.  
  5751.                 let resolve = this.__showContextMenuNetworkRequestMutexResolve__;
  5752.                 this.__showContextMenuNetworkRequestMutexResolve__= null;
  5753.  
  5754.                 if (resolve) {
  5755.                   resolve(a);
  5756.                 } else {
  5757.                   return this.showContextMenu37_(a);
  5758.                 }
  5759.  
  5760.               }
  5761.               */
  5762.  
  5763.  
  5764.               const wm37 = new WeakMap();
  5765.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5766.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5767.                 if (a) {
  5768.                   if (doDeepCopy) a = deepCopy(a);
  5769.                   wm37.set(endpoint, a);
  5770.                 } else {
  5771.                   wm37.remove(endpoint);
  5772.                 }
  5773.               }
  5774.               cProto.__getCachedEndpointData__ = function (endpoint) {
  5775.                 endpoint = endpoint || (this.data || 0).contextMenuEndpoint || 0;
  5776.                 if (endpoint) return wm37.get(endpoint);
  5777.                 return null;
  5778.               }
  5779.               cProto.__showCachedContextMenu__ = function (resolvedEndpoint) { // non-null
  5780.  
  5781.                 resolvedEndpoint = deepCopy(resolvedEndpoint);
  5782.                 // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5783.                 Promise.resolve(resolvedEndpoint).then(() => {
  5784.                   this.__showContextMenu_skip_cacheResolvedEndpointData__ = 1;
  5785.                   this.showContextMenu_(resolvedEndpoint);
  5786.                   this.__showContextMenu_skip_cacheResolvedEndpointData__ = 0;
  5787.                 });
  5788.  
  5789.  
  5790.  
  5791.               }
  5792.               cProto.showContextMenu = function (a) {
  5793.                 if (!this.__showContextMenu_forceNativeRequest__) {
  5794.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5795.                   if (endpoint) {
  5796.                     const resolvedEndpoint = this.__getCachedEndpointData__(endpoint);
  5797.                     if (resolvedEndpoint) {
  5798.                       this.__showCachedContextMenu__(resolvedEndpoint);
  5799.                       return;
  5800.                     }
  5801.                   }
  5802.                 }
  5803.                 return this.showContextMenu37(a);
  5804.               }
  5805.  
  5806.               cProto.showContextMenu_ = function (a) {
  5807.                 if (!this.__showContextMenu_skip_cacheResolvedEndpointData__) {
  5808.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5809.                   if (endpoint) {
  5810.                     const f = this.__cacheResolvedEndpointData__;
  5811.                     if (typeof f === 'function') f(endpoint, a, true);
  5812.                   }
  5813.                 }
  5814.                 return this.showContextMenu37_(a);
  5815.               }
  5816.  
  5817.  
  5818.  
  5819.  
  5820.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - OK", tag);
  5821.  
  5822.  
  5823.  
  5824.             } else {
  5825.  
  5826.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN -  NG", tag);
  5827.  
  5828.             }
  5829.  
  5830.  
  5831.  
  5832.             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) {
  5833.  
  5834.  
  5835.               cProto.showContextMenu48 = cProto.showContextMenu;
  5836.  
  5837.  
  5838.               cProto.showContextMenu = function (a) {
  5839.  
  5840.                 const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5841.                 if (endpoint && typeof this.is === 'string' && this.menuVisible === false && this.menuOpen === false) {
  5842.  
  5843.                   const parentComponent = this.parentComponent;
  5844.                   if (parentComponent && parentComponent.is === 'yt-live-chat-item-list-renderer' && parentComponent.contextMenuOpen === false && parentComponent.allowScroll === true) {
  5845.                     parentComponent.allowScroll = false;
  5846.                   }
  5847.                 }
  5848.  
  5849.                 return this.showContextMenu48.apply(this, arguments);
  5850.  
  5851.               }
  5852.  
  5853.  
  5854.  
  5855.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU - OK", tag);
  5856.  
  5857.  
  5858.  
  5859.             } else {
  5860.  
  5861.               console.log("ADVANCED_NOT_ALLOW_SCROLL_FOR_SHOW_CONTEXT_MENU -  NG", tag);
  5862.  
  5863.             }
  5864.  
  5865.  
  5866.  
  5867.  
  5868.  
  5869.             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) {
  5870.  
  5871.               cProto.showContextMenu47_ = cProto.showContextMenu_;
  5872.               cProto.showContextMenu47 = cProto.showContextMenu;
  5873.  
  5874.               const mutex = new Mutex();
  5875.               let __showContextMenu_mutex_unlock__ = null;
  5876.               cProto.__showContextMenu_mutex_unlock_isEmpty__ = () => {
  5877.                 return __showContextMenu_mutex_unlock__ === null;
  5878.               }
  5879.               cProto.__showContextMenu_assign_lock__ = function (p) {
  5880.  
  5881.  
  5882.                 mutex.lockWith(unlock => {
  5883.                   p.then(unlock);
  5884.                 });
  5885.  
  5886.               }
  5887.               let lastShowMenuTarget = null;
  5888.               cProto.showContextMenu = function (a) {
  5889.                 lastShowMenuTarget = this;
  5890.  
  5891.                 if (this.__showContextMenu_sync_mode_request__) {
  5892.  
  5893.                   return this.showContextMenu47(a);
  5894.                 } else {
  5895.  
  5896.  
  5897.                   mutex.lockWith(unlock => {
  5898.                     if (lastShowMenuTarget !== this) {
  5899.                       unlock();
  5900.                       return;
  5901.                     }
  5902.  
  5903.                     setTimeout(unlock, 800); // in case network failure
  5904.                     __showContextMenu_mutex_unlock__ = unlock;
  5905.                     try {
  5906.                       this.showContextMenu47(a);
  5907.                     } catch (e) {
  5908.                       console.warn(e);
  5909.                       unlock(); // in case function script error
  5910.                     }
  5911.  
  5912.                   });
  5913.  
  5914.                 }
  5915.  
  5916.  
  5917.               }
  5918.  
  5919.  
  5920.               cProto.showContextMenu_ = function (a) {
  5921.  
  5922.                 if (__showContextMenu_mutex_unlock__ && this === lastShowMenuTarget) {
  5923.                   __showContextMenu_mutex_unlock__();
  5924.                   __showContextMenu_mutex_unlock__ = null;
  5925.                 }
  5926.                 return this.showContextMenu47_(a);
  5927.  
  5928.               }
  5929.  
  5930.               /*
  5931.               const wm37 = new WeakMap();
  5932.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5933.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5934.                 if (a) {
  5935.                   if (doDeepCopy) a = deepCopy(a);
  5936.                   wm37.set(endpoint, a);
  5937.                 } else {
  5938.                   wm37.remove(endpoint);
  5939.                 }
  5940.               }
  5941.               cProto.__showContextMenuNetworkRequestMutex__ = null;
  5942.               cProto.__showContextMenuNetworkRequestMutexResolve__  = null;
  5943.               cProto.showContextMenu = function (a) {
  5944.                 if(this.__showContextMenu_forceNativeRequest__){
  5945.                   return this.showContextMenu37(a);
  5946.                 }
  5947.                 const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5948.                 if (!endpoint) {
  5949.                   return this.showContextMenu37(a);
  5950.                 }
  5951.                 this.__showContextMenuNetworkRequestMutex__ = (this.__showContextMenuNetworkRequestMutex__ || Promise.resolve())
  5952.                 .then(()=>new Promise(lockResolve=>{
  5953.  
  5954.                   if (endpoint !== (this.data || 0).contextMenuEndpoint || 0){
  5955.                     lockResolve();
  5956.                     return;
  5957.                   }
  5958.  
  5959.                   if (endpoint) {
  5960.                     let resolvedEndpoint = wm37.get(endpoint);
  5961.                     if (resolvedEndpoint) {
  5962.                       resolvedEndpoint = deepCopy(resolvedEndpoint);
  5963.                       // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5964.                       Promise.resolve(resolvedEndpoint).then(() => {
  5965.                         this.showContextMenu37_(resolvedEndpoint);
  5966.                       });
  5967.                       lockResolve();
  5968.                       return;
  5969.                       //this.showContextMenu37_(JSON.parse(JSON.stringify(a)));
  5970.                       //return;
  5971.                     }
  5972.  
  5973.                     this.__showContextMenuNetworkRequestMutexResolve__ = new Promise(resolve=>{
  5974.                       this.__showContextMenuNetworkRequestMutexResolve__ = resolve;
  5975.  
  5976.                     }).then((a)=>{
  5977.  
  5978.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5979.                   if (endpoint) {
  5980.                     const f = this.__cacheResolvedEndpointData__
  5981.                     if (typeof f === 'function') f(endpoint, a, true);
  5982.                   }
  5983.                    this.showContextMenu37_(a);
  5984.                    lockResolve();
  5985.  
  5986.                     }).catch(console.warn)
  5987.  
  5988.                   }else{
  5989.  
  5990.                     this.__showContextMenuNetworkRequestMutexResolve__ = null;
  5991.                     this.showContextMenu37(a);
  5992.                     lockResolve();
  5993.                   }
  5994.  
  5995.  
  5996.  
  5997.  
  5998.                 })).catch(console.warn);
  5999.               }
  6000.  
  6001.               cProto.showContextMenu_ = function (a) {
  6002.  
  6003.                 let resolve = this.__showContextMenuNetworkRequestMutexResolve__;
  6004.                 this.__showContextMenuNetworkRequestMutexResolve__= null;
  6005.  
  6006.                 if (resolve) {
  6007.                   resolve(a);
  6008.                 } else {
  6009.                   return this.showContextMenu37_(a);
  6010.                 }
  6011.  
  6012.               }
  6013.               */
  6014.  
  6015.  
  6016.  
  6017.  
  6018.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - OK", tag);
  6019.  
  6020.  
  6021.  
  6022.             } else {
  6023.  
  6024.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU -  NG", tag);
  6025.  
  6026.             }
  6027.  
  6028.  
  6029.  
  6030.  
  6031.           })();
  6032.  
  6033.         }
  6034.  
  6035.  
  6036.  
  6037.         console.log("[End]");
  6038.  
  6039.         console.groupEnd();
  6040.  
  6041.       }).catch(console.warn);
  6042.  
  6043.  
  6044.  
  6045.       customElements.whenDefined('tp-yt-iron-dropdown').then(() => {
  6046.  
  6047.         mightFirstCheckOnYtInit();
  6048.         groupCollapsed("YouTube Super Fast Chat", " | tp-yt-iron-dropdown hacks");
  6049.         console.log("[Begin]");
  6050.         (() => {
  6051.  
  6052.           const tag = "tp-yt-iron-dropdown";
  6053.           const dummy = document.createElement(tag);
  6054.  
  6055.           const cProto = getProto(dummy);
  6056.           if (!cProto || !cProto.attached) {
  6057.             console.warn(`proto.attached for ${tag} is unavailable.`);
  6058.             return;
  6059.           }
  6060.  
  6061.  
  6062.           if (USE_VANILLA_DEREF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf34 && fnIntegrity(cProto.__deraf) === '2.42.24') {
  6063.             cProto.__deraf_hn__ = function (sId, fn) {
  6064.               const rhKey = `_rafHandler_${sId}`;
  6065.               const m = this[rhKey] || (this[rhKey] = new WeakMap());
  6066.               if (m.has(fn)) return m.get(fn);
  6067.               const resFn = () => {
  6068.                 this.__rafs[sId] = null;
  6069.                 fn.call(this)
  6070.               };
  6071.               m.set(fn, resFn);
  6072.               m.set(resFn, resFn);
  6073.               return resFn;
  6074.             };
  6075.             cProto.__deraf34 = cProto.__deraf;
  6076.             cProto.__deraf = function (a, b) { // sId, fn
  6077.               let c = this.__rafs;
  6078.               null !== c[a] && cancelAnimationFrame(c[a]);
  6079.               c[a] = requestAnimationFrame(this.__deraf_hn__(a, b));
  6080.             };
  6081.             console.log("USE_VANILLA_DEREF - OK");
  6082.           } else {
  6083.             console.log("USE_VANILLA_DEREF - NG");
  6084.           }
  6085.  
  6086.           if (FIX_DROPDOWN_DERAF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf66) {
  6087.             cProto.__deraf66 = cProto.__deraf;
  6088.             cProto.__deraf = function (sId, fn) {
  6089.               if (this.__byPassRAF__) {
  6090.                 Promise.resolve().then(() => {
  6091.                   fn.call(this);
  6092.                 });
  6093.               }
  6094.               let r = this.__deraf66.apply(this, arguments);
  6095.               return r;
  6096.             }
  6097.             console.log("FIX_DROPDOWN_DERAF - OK");
  6098.           } else {
  6099.             console.log("FIX_DROPDOWN_DERAF - NG");
  6100.           }
  6101.  
  6102.  
  6103.           if (BOOST_MENU_OPENCHANGED_RENDERING && typeof cProto.__openedChanged === 'function' && !cProto.__mtChanged__ && fnIntegrity(cProto.__openedChanged) === '0.46.20') {
  6104.  
  6105.             let lastClose = null;
  6106.             let lastOpen = null;
  6107.             let cid = 0;
  6108.  
  6109.             cProto.__mtChanged__ = function (b) {
  6110.  
  6111.               Promise.resolve().then(() => {
  6112.                 this._applyFocus();
  6113.               }).then(() => {
  6114.                 b ? this._renderOpened() : this._renderClosed();
  6115.               }).catch(console.warn);
  6116.  
  6117.             };
  6118.  
  6119.             const __moChanged__ = () => {
  6120.               if (!cid) return;
  6121.               // console.log(553, !!lastOpen, !!lastClose);
  6122.               cid = 0;
  6123.               if (lastOpen && !lastClose && lastOpen.isAttached) {
  6124.                 lastOpen.__mtChanged__(1)
  6125.               } else if (lastClose && !lastOpen && lastClose.isAttached) {
  6126.                 lastClose.__mtChanged__(0);
  6127.               }
  6128.               lastOpen = null;
  6129.               lastClose = null;
  6130.             };
  6131.  
  6132.  
  6133.             if (typeof cProto._openedChanged === 'function' && !cProto._openedChanged66) {
  6134.               cProto._openedChanged66 = cProto._openedChanged;
  6135.               cProto._openedChanged = function () {
  6136.                 // this.__byPassRAF__ = !lastOpen ? true : false; // or just true?
  6137.                 this.__byPassRAF__ = true;
  6138.                 let r = this._openedChanged66.apply(this, arguments);
  6139.                 this.__byPassRAF__ = false;
  6140.                 return r;
  6141.               }
  6142.             }
  6143.  
  6144.             const pSetGet = (key, pdThis, pdBase) => {
  6145.               // note: this is not really a standard way for the getOwnPropertyDescriptors; but it is sufficient to make the job done
  6146.               return {
  6147.                 get: (pdThis[key] || 0).get || (pdBase[key] || 0).get,
  6148.                 set: (pdThis[key] || 0).set || (pdBase[key] || 0).set
  6149.               };
  6150.             };
  6151.  
  6152.             cProto.__modifiedMenuPropsFn__ = function () {
  6153.               const pdThis = Object.getOwnPropertyDescriptors(this.constructor.prototype)
  6154.               const pdBase = Object.getOwnPropertyDescriptors(this)
  6155.  
  6156.               const pdAutoFitOnAttach = pSetGet('autoFitOnAttach', pdThis, pdBase);
  6157.               const pdExpandSizingTargetForScrollbars = pSetGet('expandSizingTargetForScrollbars', pdThis, pdBase);
  6158.               const pdAllowOutsideScroll = pSetGet('allowOutsideScroll', pdThis, pdBase);
  6159.  
  6160.               if (pdAutoFitOnAttach.get || pdAutoFitOnAttach.set) {
  6161.                 console.warn('there is setter/getter for autoFitOnAttach');
  6162.                 return;
  6163.               }
  6164.               if (pdExpandSizingTargetForScrollbars.get || pdExpandSizingTargetForScrollbars.set) {
  6165.                 console.warn('there is setter/getter for expandSizingTargetForScrollbars');
  6166.                 return;
  6167.               }
  6168.               if (!pdAllowOutsideScroll.get || !pdAllowOutsideScroll.set) {
  6169.                 console.warn('there is NO setter-getter for allowOutsideScroll');
  6170.                 return;
  6171.               }
  6172.  
  6173.               let { autoFitOnAttach, expandSizingTargetForScrollbars, allowOutsideScroll } = this;
  6174.  
  6175.               this.__AllowOutsideScrollPD__ = pdAllowOutsideScroll;
  6176.  
  6177.               const fitEnable = CHAT_MENU_REFIT_ALONG_SCROLLING === 2;
  6178.  
  6179.               Object.defineProperties(this, {
  6180.                 autoFitOnAttach: {
  6181.                   get() {
  6182.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6183.                     return autoFitOnAttach;
  6184.                   },
  6185.                   set(nv) {
  6186.                     autoFitOnAttach = nv;
  6187.                     return true;
  6188.                   },
  6189.                   enumerable: true,
  6190.                   configurable: true
  6191.                 }, expandSizingTargetForScrollbars: {
  6192.                   get() {
  6193.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6194.                     return expandSizingTargetForScrollbars;
  6195.                   },
  6196.                   set(nv) {
  6197.                     expandSizingTargetForScrollbars = nv;
  6198.                     return true;
  6199.                   },
  6200.                   enumerable: true,
  6201.                   configurable: true
  6202.                 }, allowOutsideScroll: {
  6203.                   get() {
  6204.                     if (this._modifiedMenuPropOn062__) return true;
  6205.                     return allowOutsideScroll;
  6206.                   },
  6207.                   set(nv) {
  6208.                     allowOutsideScroll = nv;
  6209.                     this.__AllowOutsideScrollPD__.set.call(this, nv);
  6210.                     return true;
  6211.                   },
  6212.                   enumerable: true,
  6213.                   configurable: true
  6214.                 }
  6215.               })
  6216.             };
  6217.  
  6218.             /*
  6219.                // ***** position() to be changed. *****
  6220.               tp-yt-iron-dropdown[class], tp-yt-iron-dropdown[class] #contentWrapper, tp-yt-iron-dropdown[class] ytd-menu-popup-renderer[class] {
  6221.  
  6222.                   overflow: visible !important;
  6223.                   min-width: max-content !important;
  6224.                   max-width: max-content !important;
  6225.                   max-height: max-content !important;
  6226.                   min-height: max-content !important;
  6227.                   white-space: nowrap;
  6228.               }
  6229.  
  6230.             */
  6231.             if (FIX_MENU_POSITION_N_SIZING_ON_SHOWN && typeof cProto.position === 'function' && !cProto.position34 && typeof cProto.refit === 'function') {
  6232.  
  6233.               let m34 = 0;
  6234.               cProto.__refitByPosition__ = function () {
  6235.                 m34++;
  6236.                 if (m34 <= 0) m34 = 0;
  6237.                 if (m34 !== 1) return;
  6238.                 const hostElement = this.hostElement || this;
  6239.                 if (document.visibilityState === 'visible') {
  6240.                   const sizingTarget = this.sizingTarget;
  6241.                   if (!sizingTarget) {
  6242.                     m34 = 0;
  6243.                     return;
  6244.                   }
  6245.  
  6246.                   let useVisibilityCollapse = true;
  6247.                   if (HTMLElement.prototype.querySelector.call(sizingTarget, 'yt-icon:empty')) {
  6248.                     useVisibilityCollapse = false;
  6249.                   }
  6250.  
  6251.                   if (useVisibilityCollapse) {
  6252.                     hostElement.style.visibility = 'collapse';
  6253.                     sizingTarget.style.visibility = 'collapse';
  6254.                   } else {
  6255.                     hostElement.setAttribute('rNgzQ', '');
  6256.                     sizingTarget.setAttribute('rNgzQ', '');
  6257.                   }
  6258.  
  6259.                   const gn = () => {
  6260.  
  6261.                     if (useVisibilityCollapse) {
  6262.                       hostElement.style.visibility = '';
  6263.                       sizingTarget.style.visibility = '';
  6264.                     } else {
  6265.                       hostElement.removeAttribute('rNgzQ');
  6266.                       sizingTarget.removeAttribute('rNgzQ');
  6267.                     }
  6268.                   }
  6269.  
  6270.                   const an = async () => {
  6271.                     while (m34 >= 1) {
  6272.                       await renderReadyPn(sizingTarget);
  6273.                       if (this.opened && this.isAttached && sizingTarget.isConnected === true && sizingTarget === this.sizingTarget) {
  6274.                         if (sizingTarget.matches('ytd-menu-popup-renderer[slot="dropdown-content"].yt-live-chat-app')) this.refit();
  6275.                       }
  6276.                       m34--;
  6277.                     }
  6278.                     m34 = 0;
  6279.                     Promise.resolve().then(gn);
  6280.                   }
  6281.                   setTimeout(an, 4); // wait those resizing function calls
  6282.  
  6283.  
  6284.                 } else {
  6285.                   m34 = 0;
  6286.                 }
  6287.               }
  6288.               cProto.position34 = cProto.position
  6289.               cProto.position = function () {
  6290.                 if (this._positionInitialize_) {
  6291.                   this._positionInitialize_ = 0;
  6292.                   this.__refitByPosition__();
  6293.                 }
  6294.                 let r = cProto.position34.apply(this, arguments);
  6295.                 return r;
  6296.               }
  6297.               console.log("FIX_MENU_POSITION_ON_SHOWN - OK");
  6298.  
  6299.             } else {
  6300.  
  6301.               console.log("FIX_MENU_POSITION_ON_SHOWN - NG");
  6302.  
  6303.             }
  6304.  
  6305.  
  6306.  
  6307.             cProto.__openedChanged = function () {
  6308.               this._positionInitialize_ = 1;
  6309.               // this.removeAttribute('horizontal-align')
  6310.               // this.removeAttribute('vertical-align')
  6311.               if (typeof this.__menuTypeCheck__ !== 'boolean') {
  6312.                 this.__menuTypeCheck__ = true;
  6313.                 if (CHAT_MENU_SCROLL_UNLOCKING) {
  6314.                   this._modifiedMenuPropOn062__ = false;
  6315.                   // console.log(513, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6316.                   // this.autoFitOnAttach = true;
  6317.                   // this.expandSizingTargetForScrollbars = true;
  6318.                   // this.allowOutsideScroll = true;
  6319.                   // console.log(519,Object.getOwnPropertyDescriptors(this.constructor.prototype))
  6320.                   this.__modifiedMenuPropsFn__();
  6321.                   // this.constrain= function(){}
  6322.                   // this.position= function(){}
  6323.  
  6324.                   // this.autoFitOnAttach = true;
  6325.                   // this.expandSizingTargetForScrollbars = true;
  6326.                   // this.allowOutsideScroll = true;
  6327.                 }
  6328.               }
  6329.               if (CHAT_MENU_SCROLL_UNLOCKING && this.opened) {
  6330.                 let newValue = null;
  6331.                 const positionTarget = this.positionTarget;
  6332.                 if (positionTarget && positionTarget.classList.contains('yt-live-chat-text-message-renderer')) {
  6333.                   if (this._modifiedMenuPropOn062__ === false) {
  6334.                     newValue = true;
  6335.                   }
  6336.                 } else if (this._modifiedMenuPropOn062__ === true) {
  6337.                   newValue = false;
  6338.                 }
  6339.                 if (newValue !== null) {
  6340.                   const beforeAllowOutsideScroll = this.allowOutsideScroll;
  6341.                   this._modifiedMenuPropOn062__ = newValue;
  6342.                   const afterAllowOutsideScroll = this.allowOutsideScroll;
  6343.                   if (beforeAllowOutsideScroll !== afterAllowOutsideScroll) this.__AllowOutsideScrollPD__.set.call(this, afterAllowOutsideScroll);
  6344.                 }
  6345.               }
  6346.  
  6347.               if (this.opened) {
  6348.  
  6349.                 Promise.resolve().then(() => {
  6350.  
  6351.                   this._prepareRenderOpened();
  6352.                 }).then(() => {
  6353.                   this._manager.addOverlay(this);
  6354.                   if (this._manager._overlays.length === 1) {
  6355.                     lastOpen = this;
  6356.                     lastClose = null;
  6357.                   } else {
  6358.                     return 1;
  6359.                   }
  6360.                   // if (cid) {
  6361.                   //   clearTimeout(cid);
  6362.                   //   cid = -1;
  6363.                   //   this.__moChanged__();
  6364.                   //   cid = 0;
  6365.                   // } else {
  6366.                   //   cid = -1;
  6367.                   //   this.__moChanged__();
  6368.                   //   cid = 0;
  6369.                   // }
  6370.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6371.                   // console.log(580, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6372.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6373.                   cid = cid || requestAnimationFrame(__moChanged__);
  6374.                 }).then((r) => {
  6375.  
  6376.                   if (r) this.__mtChanged__(1);
  6377.                 }).catch(console.warn);
  6378.  
  6379.               } else {
  6380.                 Promise.resolve().then(() => {
  6381.                   this._manager.removeOverlay(this);
  6382.                   if (this._manager._overlays.length === 0) {
  6383.                     lastClose = this;
  6384.                     lastOpen = null;
  6385.                   } else {
  6386.                     return 1;
  6387.                   }
  6388.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6389.                   // console.log(581, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6390.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6391.                   cid = cid || requestAnimationFrame(__moChanged__);
  6392.                 }).then((r) => {
  6393.                   if (r) this.__mtChanged__(0);
  6394.                 }).catch(console.warn);
  6395.  
  6396.               }
  6397.  
  6398.             }
  6399.             console.log("BOOST_MENU_OPENCHANGED_RENDERING - OK");
  6400.  
  6401.           } else {
  6402.  
  6403.             assertor(() => fnIntegrity(cProto.__openedChanged, '0.46.20'));
  6404.             console.log("FIX_MENU_REOPEN_RENDER_PERFORMANC_1 - NG");
  6405.  
  6406.           }
  6407.  
  6408.  
  6409.           if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK && typeof cProto.__openedChanged === 'function' && !cProto.__openedChanged82) {
  6410.  
  6411.             cProto.__openedChanged82 = cProto.__openedChanged;
  6412.  
  6413.  
  6414.             cProto.__openedChanged = function () {
  6415.  
  6416.               // currentMenuPivotWR = null;
  6417.               // console.log(1480, '__openedChanged.A', this.positionTarget)
  6418.  
  6419.  
  6420.  
  6421.               // if (this.opened && this.positionTarget) {
  6422.  
  6423.               //   const positionTarget = this.positionTarget;
  6424.               //   console.log(1480, '__openedChanged.B', positionTarget)
  6425.               //   currentMenuPivotWR = mWeakRef(positionTarget);
  6426.  
  6427.               // }
  6428.  
  6429.               const positionTarget = this.positionTarget;
  6430.               currentMenuPivotWR = positionTarget ? mWeakRef(positionTarget) : null;
  6431.               return this.__openedChanged82.apply(this, arguments);
  6432.             }
  6433.           }
  6434.  
  6435.  
  6436.           // if(FIX_MENU_CAPTURE_SCROLL && typeof cProto.__onCaptureScroll === 'function' && !cProto.__onCaptureScroll66){
  6437.  
  6438.           //   cProto.__onCaptureScroll66 = cProto.__onCaptureScroll;
  6439.  
  6440.           //   cProto.__onCaptureScroll = function(a){
  6441.  
  6442.           //     const q = true;
  6443.           //     if(this.scrollAction === 'lock'  && q && this.opened){
  6444.  
  6445.           //       // console.log(9107, this.scrollAction, this.__isAnimating, this.opened, a); // lock; __isAnimating = false
  6446.           //       async function af() {
  6447.           //         this.__isAnimating && this._finishRenderOpened();
  6448.           //         if (!this.opened) return;
  6449.           //         this.__restoreScrollPosition();
  6450.           //         await new Promise(r => requestAnimationFrame(r));
  6451.           //         if (!this.opened) return;
  6452.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6453.           //         if (!this.opened) return;
  6454.           //         this.__restoreScrollPosition();
  6455.           //         await new Promise(r => requestAnimationFrame(r));
  6456.           //         if (!this.opened) return;
  6457.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6458.           //         if (!this.opened) return;
  6459.           //         this.opened && !this.__isAnimating && this.refit();
  6460.           //       }
  6461.           //       Promise.resolve().then(af);
  6462.  
  6463.           //        return cProto.__onCaptureScroll66.apply(this, arguments);
  6464.           //     }else{
  6465.  
  6466.           //       // console.log(9102, this.scrollAction, this.__isAnimating, this.opened, a); // lock
  6467.  
  6468.           //       return cProto.__onCaptureScroll66.apply(this, arguments);
  6469.           //     }
  6470.           //   }
  6471.           //   console.log("FIX_MENU_CAPTURE_SCROLL - OK");
  6472.           // }else{
  6473.           //   console.log("FIX_MENU_CAPTURE_SCROLL - NG");
  6474.  
  6475.           // }
  6476.  
  6477.  
  6478.         })();
  6479.  
  6480.         console.log("[End]");
  6481.  
  6482.         console.groupEnd();
  6483.  
  6484.       }).catch(console.warn);
  6485.  
  6486.  
  6487.       if (LIVE_CHAT_FLUSH_ON_FOREGROUND_ONLY) {
  6488.  
  6489.  
  6490.         customElements.whenDefined("yt-live-chat-renderer").then(() => {
  6491.  
  6492.           mightFirstCheckOnYtInit();
  6493.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  6494.           console.log("[Begin]");
  6495.           (() => {
  6496.  
  6497.             const tag = "yt-live-chat-renderer"
  6498.             const dummy = document.createElement(tag);
  6499.  
  6500.             const cProto = getProto(dummy);
  6501.             if (!cProto || !cProto.attached) {
  6502.               console.warn(`proto.attached for ${tag} is unavailable.`);
  6503.               return;
  6504.             }
  6505.  
  6506.  
  6507.             if (typeof cProto._flushProperties === 'function' && !cProto._flushProperties22 && cProto._flushProperties.length === 0) {
  6508.  
  6509.               cProto.flushPendingCount = 0;
  6510.               cProto._flushProperties22 = cProto._flushProperties;
  6511.  
  6512.               cProto._flushProperties = function () {
  6513.                 if (foregroundPromiseForLiveChatFlush) return;
  6514.                 this.flushPendingCount++;
  6515.                 const tid = this.flushPendingCount;
  6516.                 getForegroundPromiseForLiveChatFlush().then(() => {
  6517.                   if (tid !== this.flushPendingCount) return;
  6518.                   // console.log('_flushProperties22', Date.now())
  6519.                   this._flushProperties22();
  6520.                 });
  6521.               };
  6522.  
  6523.  
  6524.               console.log("cProto._flushProperties - OK");
  6525.  
  6526.             } else {
  6527.               console.log("cProto._flushProperties - NG");
  6528.  
  6529.             }
  6530.  
  6531.           })();
  6532.  
  6533.           console.log("[End]");
  6534.  
  6535.           console.groupEnd();
  6536.  
  6537.         }).catch(console.warn);
  6538.  
  6539.  
  6540.       }
  6541.  
  6542.  
  6543.  
  6544.  
  6545.  
  6546.  
  6547.       /*
  6548.  
  6549.  
  6550.  
  6551.  
  6552.  
  6553.           var FU = function() {
  6554.               var a = this;
  6555.               this.nextHandle_ = 1;
  6556.               this.clients_ = {};
  6557.               this.JSC$10323_callbacks_ = {};
  6558.               this.unsubscribeAsyncHandles_ = {};
  6559.               this.subscribe = vl(function(b, c, d) {
  6560.                   var e = Geb(b);
  6561.                   if (e in a.clients_)
  6562.                       e in a.unsubscribeAsyncHandles_ && Jq.cancel(a.unsubscribeAsyncHandles_[e]);
  6563.                   else {
  6564.                       a: {
  6565.                           var h = Geb(b), l;
  6566.                           for (l in a.unsubscribeAsyncHandles_) {
  6567.                               var m = a.clients_[l];
  6568.                               if (m instanceof KO) {
  6569.                                   delete a.clients_[l];
  6570.                                   delete a.JSC$10323_callbacks_[l];
  6571.                                   Jq.cancel(a.unsubscribeAsyncHandles_[l]);
  6572.                                   delete a.unsubscribeAsyncHandles_[l];
  6573.                                   i6a(m);
  6574.                                   m.objectId_ = new FQa(h);
  6575.                                   m.register();
  6576.                                   d = m;
  6577.                                   break a
  6578.                               }
  6579.                           }
  6580.                           d.objectSource = b.invalidationId.objectSource;
  6581.                           d.objectId = h;
  6582.                           if (b = b.webAuthConfigurationData)
  6583.                               b.multiUserSessionIndex && (d.sessionIndex = parseInt(b.multiUserSessionIndex, 10)),
  6584.                               b.pageId && (d.pageId = b.pageId);
  6585.                           d = new KO(d,a.handleInvalidationData_.bind(a));
  6586.                           d.register()
  6587.                       }
  6588.                       a.clients_[e] = d;
  6589.                       a.JSC$10323_callbacks_[e] = {}
  6590.                   }
  6591.                   d = a.nextHandle_++;
  6592.                   a.JSC$10323_callbacks_[e][d] = c;
  6593.                   return d
  6594.               })
  6595.           };
  6596.           FU.prototype.unsubscribe = function(a, b) {
  6597.               var c = Geb(a);
  6598.               if (c in this.JSC$10323_callbacks_ && (delete this.JSC$10323_callbacks_[c][b],
  6599.               !this.JSC$10323_callbacks_[c].length)) {
  6600.                   var d = this.clients_[c];
  6601.                   b = Jq.run(function() {
  6602.                       ei(d);
  6603.                       delete this.clients_[c];
  6604.                       delete this.unsubscribeAsyncHandles_[c]
  6605.                   }
  6606.                   .bind(this));
  6607.                   this.unsubscribeAsyncHandles_[c] = b
  6608.               }
  6609.           }
  6610.           ;
  6611.  
  6612.  
  6613.       */
  6614.  
  6615.  
  6616.  
  6617.  
  6618.       const onManagerFound = (dummyManager) => {
  6619.         if (!dummyManager || typeof dummyManager !== 'object') return;
  6620.  
  6621.         const mgrProto = dummyManager.constructor.prototype;
  6622.  
  6623.         let keyCallbackStore = '';
  6624.         for (const [key, v] of Object.entries(dummyManager)) {
  6625.           if (key.includes('_callbacks_')) keyCallbackStore = key;
  6626.         }
  6627.  
  6628.         if (!keyCallbackStore || typeof mgrProto.unsubscribe !== 'function' || mgrProto.unsubscribe.length !== 2) return;
  6629.  
  6630.         if (mgrProto.unsubscribe16) return;
  6631.  
  6632.         mgrProto.unsubscribe16 = mgrProto.unsubscribe;
  6633.  
  6634.         groupCollapsed("YouTube Super Fast Chat", " | *live-chat-manager* hacks");
  6635.         console.log("[Begin]");
  6636.  
  6637.  
  6638.         // const isEmptyObject = (a) => Object.keys(a).length === 0;
  6639.         const isEmptyObject = (obj) => {
  6640.           for (let key in obj) {
  6641.             if (obj.hasOwnProperty(key)) return false;
  6642.           }
  6643.           return true;
  6644.         }
  6645.  
  6646.         const idMapper = new Map();
  6647.  
  6648.         const convertId = function (objectId) {
  6649.           if (!objectId || typeof objectId !== 'string') return null;
  6650.  
  6651.           let result = idMapper.get(objectId)
  6652.           if (result) return result;
  6653.           result = atob(objectId.replace(/-/g, "+").replace(/_/g, "/"));
  6654.           idMapper.set(objectId, result)
  6655.           return result;
  6656.         }
  6657.  
  6658.  
  6659.         const rafHandleHolder = [];
  6660.  
  6661.         let pzw = 0;
  6662.         let lza = 0;
  6663.         const genRAF = () => {
  6664.  
  6665.           pzw = requestAnimationFrame(() => {
  6666.             pzw = 0;
  6667.             if (rafHandleHolder.length === 1) {
  6668.               const f = rafHandleHolder[0];
  6669.               rafHandleHolder.length = 0;
  6670.               f();
  6671.             } else if (rafHandleHolder.length > 1) {
  6672.               let arr = rafHandleHolder.slice(0)
  6673.               rafHandleHolder.length = 0;
  6674.               for (const fn of arr) fn();
  6675.             }
  6676.           });
  6677.         };
  6678.  
  6679.  
  6680.         if (CHANGE_MANAGER_UNSUBSCRIBE) {
  6681.  
  6682.           const checkIntegrityForSubscribe = (mgr) => {
  6683.             if (mgr
  6684.               && typeof mgr.unsubscribe16 === 'function' && mgr.unsubscribe16.length === 2
  6685.               && typeof mgr.subscribe18 === 'function' && (mgr.subscribe18.length === 0 || mgr.subscribe18.length === 3)) {
  6686.  
  6687.               const ns = new Set(Object.keys(mgr));
  6688.               const ms = new Set(Object.keys(mgr.constructor.prototype));
  6689.  
  6690.               if (ns.size >= 6 && ms.size >= 4) {
  6691.                 // including 'subscribe18'
  6692.                 // 'unsubscribe16', 'subscribe19'
  6693.  
  6694.                 let r = 0;
  6695.                 for (const k of ['nextHandle_', 'clients_', keyCallbackStore, 'unsubscribeAsyncHandles_', 'subscribe', 'subscribe18']) {
  6696.                   r += ns.has(k) ? 1 : 0;
  6697.                 }
  6698.                 for (const k of ['unsubscribe', 'handleInvalidationData_', 'unsubscribe16', 'subscribe19']) {
  6699.                   r += ms.has(k) ? 1 : 0;
  6700.                 }
  6701.                 if (r === 10) {
  6702.                   const isObject = (c) => (c || 0).constructor === Object;
  6703.  
  6704.                   if (isObject(mgr['clients_']) && isObject(mgr[keyCallbackStore]) && isObject(mgr['unsubscribeAsyncHandles_'])) {
  6705.  
  6706.                     return true;
  6707.                   }
  6708.  
  6709.  
  6710.                 }
  6711.  
  6712.               }
  6713.  
  6714.  
  6715.             }
  6716.             return false;
  6717.           }
  6718.  
  6719.           mgrProto.subscribe19 = function (o, f, opts) {
  6720.  
  6721.             const ct_clients_ = this.clients_ || 0;
  6722.             const ct_handles_ = this.unsubscribeAsyncHandles_ || 0;
  6723.  
  6724.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.subscribe18.apply(this, arguments);
  6725.  
  6726.             let objectId = ((o || 0).invalidationId || 0).objectId;
  6727.             if (!objectId) return this.subscribe18.apply(this, arguments);
  6728.             objectId = convertId(objectId);
  6729.  
  6730.             // console.log('subscribe', objectId, ct_clients_[objectId], arguments);
  6731.  
  6732.             if (ct_clients_[objectId]) {
  6733.               if (ct_handles_[objectId] < 0) delete ct_handles_[objectId];
  6734.             }
  6735.  
  6736.             return this.subscribe18.apply(this, arguments);
  6737.           }
  6738.  
  6739.           mgrProto.unsubscribe = function (o, d) {
  6740.             if (!this.subscribe18 && typeof this.subscribe === 'function') {
  6741.               this.subscribe18 = this.subscribe;
  6742.               this.subscribe = this.subscribe19;
  6743.               this.__doCustomSubscribe__ = checkIntegrityForSubscribe(this);
  6744.             }
  6745.             const ct_clients_ = this.clients_;
  6746.             const ct_handles_ = this.unsubscribeAsyncHandles_;
  6747.             if (this.__doCustomSubscribe__ !== true || !ct_clients_ || !ct_handles_) return this.unsubscribe16.apply(this, arguments);
  6748.  
  6749.             let objectId = ((o || 0).invalidationId || 0).objectId;
  6750.             if (!objectId) return this.unsubscribe16.apply(this, arguments);
  6751.  
  6752.             objectId = convertId(objectId);
  6753.  
  6754.  
  6755.             // console.log('unsubscribe', objectId, ct_clients_[objectId], arguments);
  6756.  
  6757.             const callbacks = this[keyCallbackStore] || 0;
  6758.             const callbackObj = callbacks[objectId] || 0;
  6759.  
  6760.  
  6761.             if (callbackObj && (delete callbackObj[d], isEmptyObject(callbackObj))) {
  6762.               const w = ct_clients_[objectId];
  6763.               --lza;
  6764.               if (lza < -1e9) lza = -1;
  6765.               const qta = lza;
  6766.               rafHandleHolder.push(() => {
  6767.                 if (qta === ct_handles_[objectId]) {
  6768.                   try {
  6769.                     w && "function" === typeof w.dispose && w.dispose();
  6770.                     delete ct_clients_[objectId];
  6771.                     delete ct_handles_[objectId];
  6772.                   } catch (e) {
  6773.                     console.warn(e);
  6774.                   }
  6775.                 }
  6776.               });
  6777.               ct_handles_[objectId] = qta;
  6778.               if (pzw === 0) genRAF();
  6779.             }
  6780.           }
  6781.  
  6782.  
  6783.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - OK")
  6784.  
  6785.         } else {
  6786.  
  6787.           console.log("CHANGE_MANAGER_UNSUBSCRIBE - NG")
  6788.         }
  6789.  
  6790.         console.log("[End]");
  6791.  
  6792.         console.groupEnd();
  6793.  
  6794.       }
  6795.  
  6796.  
  6797.  
  6798.       /*
  6799.  
  6800.  
  6801.               a.prototype.async = function(e, h) {
  6802.                   return 0 < h ? Iq.run(e.bind(this), h) : ~Kq.run(e.bind(this))
  6803.               }
  6804.               ;
  6805.               a.prototype.cancelAsync = function(e) {
  6806.                   0 > e ? Kq.cancel(~e) : Iq.cancel(e)
  6807.               }
  6808.  
  6809.       */
  6810.  
  6811.  
  6812.  
  6813.       customElements.whenDefined("yt-invalidation-continuation").then(() => {
  6814.  
  6815.         let __dummyManager__ = null;
  6816.  
  6817.         mightFirstCheckOnYtInit();
  6818.         groupCollapsed("YouTube Super Fast Chat", " | yt-invalidation-continuation hacks");
  6819.         console.log("[Begin]");
  6820.         (() => {
  6821.  
  6822.           const tag = "yt-invalidation-continuation"
  6823.           const dummy = document.createElement(tag);
  6824.  
  6825.           const cProto = getProto(dummy);
  6826.           if (!cProto || !cProto.attached) {
  6827.             console.warn(`proto.attached for ${tag} is unavailable.`);
  6828.             return;
  6829.           }
  6830.  
  6831.           const dummyManager = (dummy.inst || dummy).manager_ || 0;
  6832.           __dummyManager__ = dummyManager;
  6833.  
  6834.           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) {
  6835.  
  6836.  
  6837.             const rafHub = new RAFHub();
  6838.  
  6839.             rafHub.keepRAF = true;
  6840.             cProto.async71 = cProto.async;
  6841.             cProto.cancelAsync71 = cProto.cancelAsync;
  6842.  
  6843.             // mostly for subscription timeoutMs 10000ms
  6844.             let mcw = 1; // 1, 3, 5, ...
  6845.             let arr = new Map();
  6846.  
  6847.             let __asyncInited__ = 0;
  6848.             let __timeoutStartId__ = null;
  6849.             const __asyncInit__ = () => {
  6850.  
  6851.               if (__asyncInited__) return;
  6852.               __asyncInited__ = 1;
  6853.  
  6854.               __timeoutStartId__ = setTimeout(() => { });
  6855.               mcw = __timeoutStartId__ * 2 + 1;
  6856.  
  6857.               setInterval(() => {
  6858.  
  6859.                 if (!arr.length) return;
  6860.  
  6861.                 const p = Date.now();
  6862.                 let deleteKeys = [];
  6863.                 arr.forEach((entry, key) => {
  6864.  
  6865.  
  6866.                   if (entry.cid === -1) {
  6867.                     entry.cid = -2;
  6868.                   } else if (entry.cid === -2) {
  6869.  
  6870.                     let offset = p - entry.add
  6871.                     if (offset < 0) offset = 0;
  6872.                     let delay2 = entry.delay - offset;
  6873.                     if (delay2 < 0) delay2 = 0;
  6874.                     entry.cid = setTimeout(entry.q(), delay2);
  6875.                     entry.q = null;
  6876.  
  6877.                   } else if (entry.add + entry.delay < p) {
  6878.                     deleteKeys.push(key);
  6879.  
  6880.                   }
  6881.  
  6882.                 })
  6883.  
  6884.                 for (const key of deleteKeys) arr.delete(key);
  6885.  
  6886.               }, 2000)
  6887.  
  6888.             }
  6889.  
  6890.  
  6891.  
  6892.  
  6893.             cProto.async = function (e, h) {
  6894.  
  6895.               if (!(0 < h)) return this.async71(e, h); // unknown timing Fn
  6896.  
  6897.               if (h < 8000) return this.async71(e, h) * 2; // native setTimeout
  6898.  
  6899.               if (typeof h !== 'number') return this.async71(e, h); // exceptional case
  6900.  
  6901.  
  6902.               if (!this.__asyncInited__) {
  6903.                 this.__asyncInited__ = 1;
  6904.                 __asyncInit__();
  6905.               }
  6906.               mcw += 2; // 2K+3, 2K+4, ...
  6907.               if (mcw > 1e9) mcw = mcw % 1e4;
  6908.               const cid = mcw;
  6909.               const q = () => {
  6910.                 return () => {
  6911.                   console.log('async h > 8000');
  6912.                   e.call(this);
  6913.                 }
  6914.               }
  6915.               // setTimeout(q, delay)
  6916.               arr.set(cid, {
  6917.                 cid: -1, // -1 -> -2 -> cid
  6918.                 add: Date.now(),
  6919.                 q,
  6920.                 delay: h
  6921.               });
  6922.               // console.log('cid-async', cid)
  6923.               return cid;
  6924.  
  6925.             }
  6926.  
  6927.  
  6928.             cProto.cancelAsync = function (e) {
  6929.  
  6930.               if (typeof e !== 'number') return this.cancelAsync71(e); // exceptional case
  6931.  
  6932.               // console.log('cid-unasync', e)
  6933.  
  6934.               if (0 > e) return this.cancelAsync71(e); // unknown timing fn
  6935.  
  6936.               if (e > __timeoutStartId__ * 2) { // __timeoutStartId__ is recorded and min is 2K+1
  6937.  
  6938.                 if ((e % 2) === 0) return this.cancelAsync71(e / 2); // 2(K+1), 2(K+2), ...
  6939.  
  6940.                 if (!arr.has(e)) return; // duplciated cancel
  6941.  
  6942.                 const entry = arr.get(e);
  6943.                 if (entry.cid < 0) {
  6944.                   entry.cid = 0;
  6945.                   arr.delete(e);
  6946.                 } else {
  6947.                   clearTimeout(entry.cid); // cid >= 1
  6948.                   entry.cid = 0;
  6949.                   arr.delete(e);
  6950.                 }
  6951.  
  6952.               } else {
  6953.  
  6954.                 return this.cancelAsync71(e);
  6955.  
  6956.               }
  6957.  
  6958.             }
  6959.  
  6960.             console.log("CHANGE_DATA_FLUSH_ASYNC - OK");
  6961.  
  6962.           } else {
  6963.             console.log("CHANGE_DATA_FLUSH_ASYNC - NG");
  6964.  
  6965.           }
  6966.  
  6967.         })();
  6968.  
  6969.         console.log("[End]");
  6970.  
  6971.         console.groupEnd();
  6972.  
  6973.  
  6974.  
  6975.         onManagerFound(__dummyManager__);
  6976.  
  6977.       }).catch(console.warn);
  6978.  
  6979.  
  6980.  
  6981.  
  6982.       if (DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION) {
  6983.  
  6984.  
  6985.  
  6986.         customElements.whenDefined("yt-live-interactivity-component-background").then(() => {
  6987.  
  6988.  
  6989.           mightFirstCheckOnYtInit();
  6990.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-interactivity-component-background hacks");
  6991.           console.log("[Begin]");
  6992.           (() => {
  6993.  
  6994.             const tag = "yt-live-interactivity-component-background"
  6995.             const dummy = document.createElement(tag);
  6996.  
  6997.             const cProto = getProto(dummy);
  6998.             if (!cProto || !cProto.attached) {
  6999.               console.warn(`proto.attached for ${tag} is unavailable.`);
  7000.               return;
  7001.             }
  7002.  
  7003.  
  7004.             if (DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION && typeof cProto.maybeLoadAnimationBackground === 'function' && !cProto.maybeLoadAnimationBackground77 && cProto.maybeLoadAnimationBackground.length === 0) {
  7005.  
  7006.               cProto.maybeLoadAnimationBackground77 = cProto.maybeLoadAnimationBackground;
  7007.               cProto.maybeLoadAnimationBackground = function () {
  7008.                 if (this.useAnimationBackground === true) this.useAnimationBackground = false;
  7009.               }
  7010.  
  7011.               console.log("DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION - OK");
  7012.  
  7013.             } else {
  7014.               console.log("DISABLE_INTERACTIVITY_BACKGROUND_ANIMATION - NG");
  7015.  
  7016.             }
  7017.  
  7018.           })();
  7019.  
  7020.           console.log("[End]");
  7021.  
  7022.           console.groupEnd();
  7023.  
  7024.  
  7025.         }).catch(console.warn);
  7026.  
  7027.       }
  7028.  
  7029.  
  7030.     }
  7031.  
  7032.  
  7033.  
  7034.  
  7035.     promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  7036.  
  7037.     const fixJsonParse = () => {
  7038.  
  7039.  
  7040.  
  7041.       if (jsonParseFix && typeof JSON.parse === 'function' && !JSON.parse68) {
  7042.  
  7043.         let { _parse, _JSON } = jsonParseFix;
  7044.  
  7045.  
  7046.         let error = 0;
  7047.         try {
  7048.           _parse.apply(JSON, ["{}"])
  7049.           _JSON = JSON;
  7050.         } catch (e) {
  7051.           error = 1;
  7052.         }
  7053.         if (error === 1) {
  7054.  
  7055.           try {
  7056.             _parse.apply(_JSON, ["{}"])
  7057.           } catch (e) {
  7058.             error = 2;
  7059.           }
  7060.           if (error === 2) {
  7061.             return;
  7062.           }
  7063.         }
  7064.  
  7065.  
  7066.         JSON.parse68 = JSON.parse;
  7067.  
  7068.         JSON.parse = function parse(a, b) {
  7069.           const stack = (new Error()).stack;
  7070.           if (stack.includes('.readyStateChangeHandler_')) return _parse.apply(_JSON, arguments);
  7071.           return this.parse68(...arguments);
  7072.         };
  7073.  
  7074.         JSON.parse.toString = function () {
  7075.           return JSON.parse68.toString();
  7076.         };
  7077.  
  7078.         jsonParseFix = null;
  7079.  
  7080.       }
  7081.  
  7082.     }
  7083.  
  7084.     if (DE_JSONPRUNE_FOR_readyStateChangeHandler_) {
  7085.       promiseForCustomYtElementsReady.then(fixJsonParse);
  7086.       fixJsonParse();
  7087.     }
  7088.  
  7089.   });
  7090.  
  7091.  
  7092.  
  7093. })({ IntersectionObserver });