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YouTube 超快聊天

YouTube直播聊天的终极性能提升

当前为 2023-08-19 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.23.2
  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.   const DO_PARTICIPANT_LIST_HACKS = true;                     // TRUE for the majority
  74.   const SHOW_PARTICIPANT_CHANGES_IN_CONSOLE = false;          // Just too annoying to show them all in popular chat
  75.   const CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = true;  // Only consider changes in renderable content (not concerned with the last chat message of the participants)
  76.   const PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED = true;
  77.  
  78.   // show more button
  79.   const ENABLE_SHOW_MORE_BLINKER = true;                      // BLINK WHEN NEW MESSAGES COME
  80.  
  81.   // faster stampDomArray_ for participants list creation
  82.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL = 1;            // 0 - OFF; 1 - ON; 2 - ON(PARTICIPANTS_LIST ONLY)
  83.   const USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET = false;
  84.  
  85.   // reuse yt components
  86.   const ENABLE_FLAGS_REUSE_COMPONENTS = true;
  87.  
  88.   // images <Group#I01>
  89.   const AUTHOR_PHOTO_SINGLE_THUMBNAIL = 1;  // 0 - disable; 1- smallest; 2- largest
  90.   const EMOJI_IMAGE_SINGLE_THUMBNAIL = 1;   // 0 - disable; 1- smallest; 2- largest
  91.   const LEAST_IMAGE_SIZE = 48;              // minium size = 48px
  92.  
  93.   const ENABLE_BASE_PREFETCHING = true;               // (SUB-)DOMAIN | dns-prefetch & preconnect
  94.   const ENABLE_PRELOAD_THUMBNAIL = true;              // subresource (prefetch) [LINK for Images]
  95.   const PREFETCH_LIMITED_SIZE_EMOJI = 512;            // DO NOT CHANGE THIS
  96.   const PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO = 68;      // DO NOT CHANGE THIS
  97.  
  98.   const FIX_SETSRC_AND_THUMBNAILCHANGE_ = true;       // Function Replacement for yt-img-shadow....
  99.   const FIX_THUMBNAIL_DATACHANGED = true;             // Function Replacement for yt-live-chat-author-badge-renderer..dataChanged
  100.   const REMOVE_PRELOADAVATARFORADDACTION = true;      // Function Replacement for yt-live-chat-renderer..preloadAvatarForAddAction
  101.  
  102.   const FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION = true;     // important [depends on <Group#I01>]
  103.   const FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT = true;  // [depends on <Group#I01>]
  104.  
  105.   const ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF = 'steps'   // false OR '', 'linear', 'steps'
  106.   // << if ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF >>
  107.   // BROWSER SUPPORT: Chrome 75+, Edge 79+, Safari 13.1+, Firefox 63+, Opera 62+
  108.   const TICKER_MAX_STEPS_LIMIT = 500;                       //  NOT LESS THAN 5 STEPS!!
  109.   // [limiting 500 max steps] is recommended for "confortable visual change"
  110.   //      min. step increment 0.2% => max steps: 500 =>  800ms per each update
  111.   //      min. step increment 0.5% => max steps: 200 => 1000ms per each update
  112.   //      min. step increment 1.0% => max steps: 100 => 1000ms per each update
  113.   //      min. step increment 2.5% => max steps:  40 => 1000ms per each update
  114.   //      min. step increment 5.0% => max steps:  20 => 1250ms per each update
  115.   const ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX = true;    // for video playback's ticker issue. [ Playback Replay - Pause at Middle - Backwards Seeking ]
  116.   // << end >>
  117.  
  118.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  119.   /*
  120.  
  121.     ### Time Approach
  122.  
  123.     // all below values can make the time interval > 250ms
  124.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  125.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  126.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  127.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  128.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  129.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  130.     
  131.     ### Pixel Check
  132.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  133.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  134.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  135.  
  136.     ### Example - totalDuration = 280000
  137.     totalDuration 280000
  138.     stepInterval 0.5
  139.     numOfSteps = Math.round(100 / stepInterval) = 200
  140.     time interval = 280000 / 200 = 1400ms <acceptable>
  141.  
  142.     ### Example - totalDuration = 18000
  143.     totalDuration 18000
  144.     stepInterval 5
  145.     numOfSteps = Math.round(100 / stepInterval) = 20
  146.     time interval = 18000 / 20 = 900ms <acceptable>
  147.  
  148.     ### Example - totalDuration = 5000
  149.     totalDuration 5000
  150.     stepInterval 5
  151.     numOfSteps = Math.round(100 / stepInterval) = 20
  152.     time interval = 5000 / 20 = 250ms <threshold value>
  153.  
  154.     ### Example - totalDuration = 3600
  155.     totalDuration 3600
  156.     stepInterval 5
  157.     numOfSteps = Math.round(100 / stepInterval) = 20
  158.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  159.  
  160.   */
  161.  
  162.   // =======================================================================================================
  163.  
  164.   // AUTOMAICALLY DETERMINED
  165.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  166.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  167.   let runTickerClassName = 'run-ticker';
  168.  
  169.   // image sizing code
  170.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  171.  
  172.  
  173. //   function KC(a, b, c, d) {
  174. //     d = void 0 === d ? "width" : d;
  175. //     if (!a || !a.length)
  176. //         return null;
  177. //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  178. //         var e = window.devicePixelRatio;
  179. //         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"));
  180. //         HC = e
  181. //     } else
  182. //         HC || (HC = window.devicePixelRatio);
  183. //     e = HC;
  184. //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  185. //     if (z("kevlar_tuner_min_thumbnail_quality"))
  186. //         return a[0].url || null;
  187. //     e = a.length;
  188. //     if (z("kevlar_tuner_max_thumbnail_quality"))
  189. //         return a[e - 1].url || null;
  190. //     if (c)
  191. //         for (var h = 0; h < e; h++)
  192. //             if (0 <= a[h].url.indexOf(c))
  193. //                 return a[h].url || null;
  194. //     for (c = 0; c < e; c++)
  195. //         if (a[c][d] >= b)
  196. //             return a[c].url || null;
  197. //     for (b = e - 1; 0 < b; b--)
  198. //         if (a[b][d])
  199. //             return a[b].url || null;
  200. //     return a[0].url || null
  201. // }
  202.  
  203.   const { IntersectionObserver } = __CONTEXT__;
  204.  
  205.   /** @type {globalThis.PromiseConstructor} */
  206.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  207.  
  208.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.")
  209.  
  210.   // necessity of cssText3_smooth_transform_position to be checked.
  211.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  212.  
  213.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  214.         position: static !important;
  215.     }
  216.  
  217.   `: '';
  218.  
  219.   // fallback if dummy style fn fails
  220.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  221.  
  222.     /* optional */
  223.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  224.         height: auto !important;
  225.         min-height: unset !important;
  226.     }
  227.  
  228.     #items.style-scope.yt-live-chat-item-list-renderer {
  229.         transform: translateY(0px) !important;
  230.     }
  231.  
  232.     /* optional */
  233.  
  234.   `: '';
  235.  
  236.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  237.  
  238.     /* ------------------------------------------------------------------------------------------------------------- */
  239.  
  240.     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 {
  241.         contain: layout style;
  242.     }
  243.  
  244.     #items.style-scope.yt-live-chat-item-list-renderer {
  245.         contain: layout paint style;
  246.     }
  247.  
  248.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  249.         contain: style;
  250.     }
  251.  
  252.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  253.         contain: size style;
  254.     }
  255.  
  256.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  257.         contain: size layout paint style;
  258.     }
  259.  
  260.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  261.         contain: layout paint style;
  262.     }
  263.  
  264.     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 {
  265.         contain: layout style;
  266.     }
  267.  
  268.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  269.         contain: layout paint style;
  270.     }
  271.  
  272.     /* ------------------------------------------------------------------------------------------------------------- */
  273.  
  274.   ` : '';
  275.  
  276.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  277.  
  278.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  279.         top: 4px;
  280.         transition-property: top;
  281.         bottom: unset;
  282.     }
  283.  
  284.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  285.         top: -42px;
  286.     }
  287.  
  288.   `: '';
  289.  
  290.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  291.  
  292.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  293.         contain: layout style;
  294.     }
  295.  
  296.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  297.         overflow: visible;
  298.     }
  299.  
  300.   `: '';
  301.  
  302.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  303.  
  304.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  305.         --yt-live-chat-action-panel-top-border: none;
  306.     }
  307.  
  308.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  309.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  310.     }
  311.  
  312.     html #panel-pages.yt-live-chat-renderer {
  313.         border-top: 0;
  314.         border-bottom: 0;
  315.     }
  316.  
  317.   `: '';
  318.  
  319.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  320.  
  321.     img,
  322.     yt-img-shadow[height][width],
  323.     yt-img-shadow {
  324.         content-visibility: visible !important;
  325.     }
  326.  
  327.   `  : '';
  328.  
  329.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  330.  
  331.     /* remove YouTube constant will-change */
  332.     /* constant value will slow down the performance; default auto */
  333.  
  334.     /* www-player.css */
  335.     html .ytp-contextmenu,
  336.     html .ytp-settings-menu {
  337.         will-change: unset;
  338.     }
  339.  
  340.     /* frequently matched elements */
  341.     html .fill.yt-interaction,
  342.     html .stroke.yt-interaction,
  343.     html .yt-spec-touch-feedback-shape__fill,
  344.     html .yt-spec-touch-feedback-shape__stroke {
  345.         will-change: unset;
  346.     }
  347.  
  348.     /* live_chat_polymer.js */
  349.     /*
  350.     html .toggle-button.tp-yt-paper-toggle-button,
  351.     html #primaryProgress.tp-yt-paper-progress,
  352.     html #secondaryProgress.tp-yt-paper-progress,
  353.     html #onRadio.tp-yt-paper-radio-button,
  354.     html .fill.yt-interaction,
  355.     html .stroke.yt-interaction,
  356.     html .yt-spec-touch-feedback-shape__fill,
  357.     html .yt-spec-touch-feedback-shape__stroke {
  358.         will-change: unset;
  359.     }
  360.     */
  361.  
  362.     /* desktop_polymer_enable_wil_icons.js */
  363.     /* html .fill.yt-interaction,
  364.     html .stroke.yt-interaction, */
  365.     html tp-yt-app-header::before,
  366.     html tp-yt-iron-list,
  367.     html #items.tp-yt-iron-list > *,
  368.     html #onRadio.tp-yt-paper-radio-button,
  369.     html .toggle-button.tp-yt-paper-toggle-button,
  370.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  371.     html #items.ytd-post-multi-image-renderer,
  372.     html #items.ytd-horizontal-card-list-renderer,
  373.     html #items.yt-horizontal-list-renderer,
  374.     html #left-arrow.yt-horizontal-list-renderer,
  375.     html #right-arrow.yt-horizontal-list-renderer,
  376.     html #items.ytd-video-description-infocards-section-renderer,
  377.     html #items.ytd-video-description-music-section-renderer,
  378.     html #chips.ytd-feed-filter-chip-bar-renderer,
  379.     html #chips.yt-chip-cloud-renderer,
  380.     html #items.ytd-merch-shelf-renderer,
  381.     html #items.ytd-product-details-image-carousel-renderer,
  382.     html ytd-video-preview,
  383.     html #player-container.ytd-video-preview,
  384.     html #primaryProgress.tp-yt-paper-progress,
  385.     html #secondaryProgress.tp-yt-paper-progress,
  386.     html ytd-miniplayer[enabled] /* ,
  387.     html .yt-spec-touch-feedback-shape__fill,
  388.     html .yt-spec-touch-feedback-shape__stroke */ {
  389.         will-change: unset;
  390.     }
  391.  
  392.     /* other */
  393.     .ytp-videowall-still-info-content[class],
  394.     .ytp-suggestion-image[class] {
  395.         will-change: unset !important;
  396.     }
  397.  
  398.   ` : '';
  399.  
  400.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  401.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  402.  
  403.     elzm-fonts {
  404.         visibility: collapse;
  405.         position: fixed;
  406.         top: -10px;
  407.         left: -10px;
  408.         font-size: 10pt;
  409.         line-height: 100%;
  410.         width: 100px;
  411.         height: 100px;
  412.         transform: scale(0.1);
  413.         transform: scale(0.01);
  414.         transform: scale(0.001);
  415.         transform-origin: 0 0;
  416.         contain: strict;
  417.         display: block;
  418.  
  419.         user-select: none !important;
  420.         pointer-events: none !important;
  421.     }
  422.  
  423.     elzm-fonts[id]#elzm-fonts-yk75g {
  424.         user-select: none !important;
  425.         pointer-events: none !important;
  426.     }
  427.  
  428.     elzm-font {
  429.         visibility: collapse;
  430.         position: absolute;
  431.         line-height: 100%;
  432.         width: 100px;
  433.         height: 100px;
  434.         contain: strict;
  435.         display: block;
  436.  
  437.         user-select: none !important;
  438.         pointer-events: none !important;
  439.     }
  440.  
  441.     elzm-font::before {
  442.         visibility: collapse;
  443.         position: absolute;
  444.         line-height: 100%;
  445.         width: 100px;
  446.         height: 100px;
  447.         contain: strict;
  448.         display: block;
  449.  
  450.         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';
  451.  
  452.         user-select: none !important;
  453.         pointer-events: none !important;
  454.     }
  455.  
  456.   `: '';
  457.  
  458.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  459.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  460.         -webkit-backdrop-filter: none;
  461.         backdrop-filter: none;
  462.     }
  463.   `: '';
  464.  
  465.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  466.  
  467.     @keyframes blinker-miuzp {
  468.         0%, 60%, 100% {
  469.             opacity: 1;
  470.         }
  471.         30% {
  472.             opacity: 0.6;
  473.         }
  474.     }
  475.  
  476.     yt-icon-button#show-more.has-new-messages-miuzp {
  477.         animation: blinker-miuzp 1.74s linear infinite;
  478.     }
  479.  
  480.   `: '';
  481.  
  482.  
  483.   const addCss = () => `
  484.  
  485.   @property --ticker-rtime {
  486.     syntax: "<percentage>";
  487.     inherits: false;
  488.     initial-value: 0%;
  489.   }
  490.  
  491.   /*
  492.   .run-ticker {
  493.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  494.   }
  495.  
  496.   .run-ticker-test {
  497.     background: #00000001;
  498.   }
  499.  
  500.   .run-ticker-forced,
  501.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  502.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  503.   {
  504.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  505.   }
  506.   */
  507.  
  508.   .run-ticker {
  509.     --ticker-bg:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  510.   }
  511.  
  512.   .run-ticker,
  513.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  514.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  515.   {
  516.     background: var(--ticker-bg) !important;
  517.   }
  518.  
  519.  
  520.   ${cssText8_fonts_pre_render}
  521.  
  522.   ${cssText9_no_backdrop_filter_when_menu_shown}
  523.  
  524.   @supports (contain: layout paint style) {
  525.  
  526.     ${cssText5}
  527.  
  528.   }
  529.  
  530.   @supports (color: var(--general)) {
  531.  
  532.     html {
  533.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  534.     }
  535.  
  536.     ${cssText3_smooth_transform_position}
  537.  
  538.     ${cssText7c_will_change_unset}
  539.  
  540.     ${cssText7b_content_visibility_unset}
  541.  
  542.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  543.         overflow-y: scroll;
  544.         padding-right: 0;
  545.     }
  546.  
  547.     ${cssText4_smooth_transform_forced_props}
  548.  
  549.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  550.         pointer-events: none !important;
  551.     }
  552.  
  553.     #continuations, #continuations * {
  554.         contain: strict;
  555.         position: fixed;
  556.         top: 2px;
  557.         height: 1px;
  558.         width: 2px;
  559.         height: 1px;
  560.         visibility: collapse;
  561.     }
  562.  
  563.     ${cssText6b_show_more_button}
  564.  
  565.     ${cssText6d_input_panel_border}
  566.  
  567.     ${cssText6c_input_panel_overflow}
  568.  
  569.   }
  570.  
  571.  
  572.   @supports (overflow-anchor: auto) {
  573.  
  574.     .no-anchor * {
  575.         overflow-anchor: none;
  576.     }
  577.     .no-anchor > item-anchor {
  578.         overflow-anchor: auto;
  579.     }
  580.  
  581.     item-anchor {
  582.  
  583.         height:1px;
  584.         width: 100%;
  585.         transform: scaleY(0.00001);
  586.         transform-origin:0 0;
  587.         contain: strict;
  588.         opacity:0;
  589.         display:flex;
  590.         position:relative;
  591.         flex-shrink:0;
  592.         flex-grow:0;
  593.         margin-bottom:0;
  594.         overflow:hidden;
  595.         box-sizing:border-box;
  596.         visibility: visible;
  597.         content-visibility: visible;
  598.         contain-intrinsic-size: auto 1px;
  599.         pointer-events:none !important;
  600.  
  601.     }
  602.  
  603.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  604.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  605.     }
  606.  
  607.     html item-anchor {
  608.  
  609.         height: 1px;
  610.         width: 1px;
  611.         top: auto;
  612.         left: auto;
  613.         right: auto;
  614.         bottom: auto;
  615.         transform: translateY(-1px);
  616.         position: absolute;
  617.         z-index: -1;
  618.  
  619.     }
  620.  
  621.   }
  622.  
  623.   @supports (color: var(--pre-rendering)) {
  624.  
  625.     @keyframes dontRenderAnimation {
  626.         0% {
  627.             background-position-x: 3px;
  628.         }
  629.         100% {
  630.             background-position-x: 4px;
  631.         }
  632.     }
  633.  
  634.     .dont-render {
  635.         /* visibility: collapse !important; */
  636.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  637.  
  638.         transform: scale(0.01) !important;
  639.         transform: scale(0.00001) !important;
  640.         transform: scale(0.0000001) !important;
  641.         transform-origin: 0 0 !important;
  642.         z-index: -1 !important;
  643.         contain: strict !important;
  644.         box-sizing: border-box !important;
  645.  
  646.         height: 1px !important;
  647.         height: 0.1px !important;
  648.         height: 0.01px !important;
  649.         height: 0.0001px !important;
  650.         height: 0.000001px !important;
  651.  
  652.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  653.  
  654.     }
  655.  
  656.     #sk35z {
  657.       display: block !important;
  658.  
  659.       visibility: collapse !important;
  660.  
  661.       transform: scale(0.01) !important;
  662.       transform: scale(0.00001) !important;
  663.       transform: scale(0.0000001) !important;
  664.       transform-origin: 0 0 !important;
  665.       z-index: -1 !important;
  666.       contain: strict !important;
  667.       box-sizing: border-box !important;
  668.  
  669.       height: 1px !important;
  670.       height: 0.1px !important;
  671.       height: 0.01px !important;
  672.       height: 0.0001px !important;
  673.       height: 0.000001px !important;
  674.  
  675.       position: absolute !important;
  676.       top: -1000px !important;
  677.       left: -1000px !important;
  678.  
  679.     }
  680.  
  681.   }
  682.  
  683.   ${cssText10_show_more_blinker}
  684.  
  685.   `;
  686.  
  687.  
  688.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  689.  
  690.   // Create a unique key for the script and check if it is already running
  691.   const hkey_script = 'mchbwnoasqph';
  692.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  693.   win[hkey_script] = true;
  694.  
  695.   if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  696.  
  697.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  698.     if (te4 < 3) {
  699.       setTimeout(() => { });
  700.       setTimeout(() => { });
  701.     }
  702.  
  703.   }
  704.  
  705.  
  706.   function dr(s) {
  707.     // reserved for future use
  708.     return s;
  709.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  710.   }
  711.  
  712.   const getProto = (element) => {
  713.     if (element) {
  714.       const cnt = element.inst || element;
  715.       return cnt.constructor.prototype || null;
  716.     }
  717.     return null;
  718.   }
  719.  
  720.   const assertor = (f) => f() || console.assert(false, f + "");
  721.  
  722.   const fnIntegrity = (f, d) => {
  723.     if (!f || typeof f !== 'function') {
  724.       console.warn('f is not a function', f);
  725.       return;
  726.     }
  727.     let p = f + "", s = 0, j = -1, w = 0;
  728.     for (let i = 0, l = p.length; i < l; i++) {
  729.       const t = p[i];
  730.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  731.         if (j < i - 1) w++;
  732.         j = i;
  733.       } else {
  734.         s++;
  735.       }
  736.     }
  737.     let itz = `${f.length}.${s}.${w}`;
  738.     if (!d) {
  739.       return itz;
  740.     } else {
  741.       return itz === d;
  742.     }
  743.   }
  744.  
  745.  
  746.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  747.  
  748.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  749.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  750.   if (!isContainSupport) {
  751.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  752.   } else {
  753.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  754.   }
  755.  
  756.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  757.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  758.   if (!isOverflowAnchorSupport) {
  759.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  760.   } else {
  761.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  762.   }
  763.  
  764.   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.
  765.  
  766.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  767.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  768.  
  769.  
  770.   const fxOperator = (proto, propertyName) => {
  771.     let propertyDescriptorGetter = null;
  772.     try {
  773.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  774.     } catch (e) { }
  775.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  776.       try {
  777.  
  778.         return propertyDescriptorGetter.call(dr(e));
  779.       } catch (e) { }
  780.       return e[propertyName];
  781.     } : (e) => e[propertyName];
  782.   };
  783.  
  784.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  785.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  786.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  787.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  788.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  789.  
  790.   const groupCollapsed = (text1, text2) => {
  791.  
  792.     console.groupCollapsed(`%c${text1}%c${text2}`,
  793.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  794.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  795.     );
  796.   }
  797.  
  798.  
  799.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  800.   const onRegistryReady = (callback) => {
  801.     if (typeof customElements === 'undefined') {
  802.       if (!('__CE_registry' in document)) {
  803.         // https://github.com/webcomponents/polyfills/
  804.         Object.defineProperty(document, '__CE_registry', {
  805.           get() {
  806.             // return undefined
  807.           },
  808.           set(nv) {
  809.             if (typeof nv == 'object') {
  810.               delete this.__CE_registry;
  811.               this.__CE_registry = nv;
  812.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  813.             }
  814.             return true;
  815.           },
  816.           enumerable: false,
  817.           configurable: true
  818.         })
  819.       }
  820.       let eventHandler = (evt) => {
  821.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  822.         const f = callback;
  823.         callback = null;
  824.         eventHandler = null;
  825.         f();
  826.       };
  827.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  828.     } else {
  829.       callback();
  830.     }
  831.   };
  832.  
  833.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  834.  
  835.   /* globals WeakRef:false */
  836.  
  837.   /** @type {(o: Object | null) => WeakRef | null} */
  838.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  839.  
  840.   /** @type {(wr: Object | null) => Object | null} */
  841.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  842.  
  843.   const { addCssManaged } = (() => {
  844.  
  845.     const addFontPreRendering = () => {
  846.  
  847.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  848.  
  849.       let efsContainer = document.createElement('elzm-fonts');
  850.       efsContainer.id = 'elzm-fonts-yk75g'
  851.  
  852.       const arr = [];
  853.       let p = document.createElement('elzm-font');
  854.       arr.push(p);
  855.  
  856.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  857.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  858.  
  859.           p = document.createElement('elzm-font');
  860.           p.style.fontWeight = size;
  861.           arr.push(p);
  862.         }
  863.       }
  864.  
  865.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  866.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  867.  
  868.           p = document.createElement('elzm-font');
  869.           p.style.fontFamily = 'Roboto';
  870.           p.style.fontWeight = size;
  871.           arr.push(p);
  872.         }
  873.       }
  874.  
  875.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  876.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  877.  
  878.           p = document.createElement('elzm-font');
  879.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  880.           p.style.fontWeight = size;
  881.           arr.push(p);
  882.         }
  883.       }
  884.  
  885.  
  886.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  887.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  888.  
  889.           p = document.createElement('elzm-font');
  890.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  891.           p.style.fontWeight = size;
  892.           arr.push(p);
  893.         }
  894.       }
  895.  
  896.  
  897.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  898.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  899.  
  900.           p = document.createElement('elzm-font');
  901.           p.style.fontFamily = 'sans-serif';
  902.           p.style.fontWeight = size;
  903.           arr.push(p);
  904.         }
  905.       }
  906.  
  907.       console.log('number of elzm-font elements', arr.length);
  908.  
  909.       HTMLElement.prototype.append.apply(efsContainer, arr);
  910.  
  911.       (document.body || document.documentElement).appendChild(efsContainer);
  912.  
  913.  
  914.       console.log('elzm-font elements have been added to the page for rendering.');
  915.  
  916.       console.groupEnd();
  917.  
  918.     }
  919.  
  920.     let isCssAdded = false;
  921.  
  922.     function addCssElement() {
  923.       let s = document.createElement('style');
  924.       s.id = 'ewRvC';
  925.       return s;
  926.     }
  927.  
  928.     const addCssManaged = () => {
  929.       if (!isCssAdded && document.documentElement && document.head) {
  930.         isCssAdded = true;
  931.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  932.         if (ENABLE_FONT_PRE_RENDERING) {
  933.           Promise.resolve().then(addFontPreRendering)
  934.         }
  935.       }
  936.     }
  937.  
  938.     return { addCssManaged };
  939.   })();
  940.  
  941.  
  942.   const { setupStyle } = (() => {
  943.  
  944.     const sp7 = Symbol();
  945.  
  946.     const proxyHelperFn = (dummy) => ({
  947.  
  948.       get(target, prop) {
  949.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  950.       },
  951.       set(target, prop, value) {
  952.         if (!(prop in dummy)) {
  953.           target[prop] = value;
  954.         }
  955.         return true;
  956.       },
  957.       has(target, prop) {
  958.         return (prop in target);
  959.       },
  960.       deleteProperty(target, prop) {
  961.         return true;
  962.       },
  963.       ownKeys(target) {
  964.         return Object.keys(target);
  965.       },
  966.       defineProperty(target, key, descriptor) {
  967.         return Object.defineProperty(target, key, descriptor);
  968.       },
  969.       getOwnPropertyDescriptor(target, key) {
  970.         return Object.getOwnPropertyDescriptor(target, key);
  971.       },
  972.  
  973.     });
  974.  
  975.     const setupStyle = (m1, m2) => {
  976.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  977.  
  978.       const dummy1v = {
  979.         transform: '',
  980.         height: '',
  981.         minHeight: '',
  982.         paddingBottom: '',
  983.         paddingTop: ''
  984.       };
  985.  
  986.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  987.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  988.         dummy1v[k] = dummyStyleFn(k);
  989.       }
  990.  
  991.       const dummy1p = proxyHelperFn(dummy1v);
  992.       const sp1v = new Proxy(m1.style, dummy1p);
  993.       const sp2v = new Proxy(m2.style, dummy1p);
  994.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  995.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  996.       m1.removeAttribute("style");
  997.       m2.removeAttribute("style");
  998.  
  999.     }
  1000.  
  1001.     return { setupStyle };
  1002.  
  1003.   })();
  1004.  
  1005.  
  1006.  
  1007.     /*
  1008.   function innerTextFixFn() {
  1009.  
  1010.     if (elemInnerText.status) return;
  1011.     elemInnerText.status = 1;
  1012.  
  1013.  
  1014.     const pd = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText');
  1015.     if (!pd) return;
  1016.     if (pd.configurable !== true) return;
  1017.     const getterFn = pd.get;
  1018.     if (typeof getterFn !== 'function') return;
  1019.     const getterGn = function () {
  1020.       const resultText = getterFn.apply(this, arguments);
  1021.       if (!resultText&& elemInnerText.status === 1) {
  1022.         const html = this.innerHTML;
  1023.         console.log(1234, html)
  1024.         if (html) {
  1025.           elemInnerText.status = 2;
  1026.           console.log(new Error().stack)
  1027.  
  1028.         }
  1029.       }
  1030.       return resultText;
  1031.     }
  1032.     let np = Object.assign({}, pd, { get: getterGn });
  1033.     console.log(124, np)
  1034.     Object.defineProperty(HTMLElement.prototype, 'innerText', np);
  1035.     console.log(125, Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText').get)
  1036.  
  1037.   }    */
  1038.  
  1039.  
  1040.   function setThumbnails(config) {
  1041.  
  1042.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1043.  
  1044.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1045.  
  1046.  
  1047.       if (thumbnails && thumbnails.length > 0) {
  1048.         if (flag0 > 0 && thumbnails.length > 1) {
  1049.           let pSize = 0;
  1050.           let newThumbnails = [];
  1051.           for (const thumbnail of thumbnails) {
  1052.             if (!thumbnail || !thumbnail.url) continue;
  1053.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1054.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1055.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1056.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1057.               newThumbnails.push(thumbnail);
  1058.               if (imageLinks) imageLinks.add(thumbnail.url);
  1059.             }
  1060.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1061.               pSize = thumbnail.width;
  1062.             }
  1063.           }
  1064.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1065.             baseObject.thumbnails = newThumbnails;
  1066.           } else {
  1067.             newThumbnails.length = 0;
  1068.           }
  1069.           newThumbnails = null;
  1070.         } else {
  1071.           for (const thumbnail of thumbnails) {
  1072.             if (thumbnail && thumbnail.url) {
  1073.               if (imageLinks) imageLinks.add(thumbnail.url);
  1074.             }
  1075.           }
  1076.         }
  1077.       }
  1078.  
  1079.     }
  1080.   }
  1081.  
  1082.   function fixLiveChatItem(item, imageLinks) {
  1083.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1084.     if (liveChatTextMessageRenderer) {
  1085.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1086.       if (messageRuns && messageRuns.length > 0) {
  1087.         for (const run of messageRuns) {
  1088.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1089.           setThumbnails({
  1090.             baseObject: emojiImage,
  1091.             thumbnails: emojiImage.thumbnails,
  1092.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1093.             imageLinks
  1094.           });
  1095.         }
  1096.       }
  1097.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1098.       setThumbnails({
  1099.         baseObject: authorPhoto,
  1100.         thumbnails: authorPhoto.thumbnails,
  1101.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1102.         imageLinks
  1103.       });
  1104.     }
  1105.   }
  1106.  
  1107.  
  1108.   const cleanContext = async (win) => {
  1109.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1110.     try {
  1111.       let mx = 16; // MAX TRIAL
  1112.       const frameId = 'vanillajs-iframe-v1';
  1113.       /** @type {HTMLIFrameElement | null} */
  1114.       let frame = document.getElementById(frameId);
  1115.       let removeIframeFn = null;
  1116.       if (!frame) {
  1117.         frame = document.createElement('iframe');
  1118.         frame.id = 'vanillajs-iframe-v1';
  1119.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1120.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1121.         n.appendChild(frame);
  1122.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1123.         const root = document.documentElement;
  1124.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1125.         removeIframeFn = (setTimeout) => {
  1126.           const removeIframeOnDocumentReady = (e) => {
  1127.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1128.             win = null;
  1129.             setTimeout(() => {
  1130.               n.remove();
  1131.               n = null;
  1132.             }, 200);
  1133.           }
  1134.           if (document.readyState !== 'loading') {
  1135.             removeIframeOnDocumentReady();
  1136.           } else {
  1137.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1138.           }
  1139.         }
  1140.       }
  1141.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1142.       const fc = frame.contentWindow;
  1143.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1144.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  1145.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  1146.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1147.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1148.       res.animate = HTMLElement.prototype.animate;
  1149.       return res;
  1150.     } catch (e) {
  1151.       console.warn(e);
  1152.       return null;
  1153.     }
  1154.   };
  1155.  
  1156.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1157.  
  1158.     const flags = () => {
  1159.       try {
  1160.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1161.       } catch (e) { }
  1162.       return null;
  1163.     };
  1164.  
  1165.     const flagsForced = () => {
  1166.       try {
  1167.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1168.       } catch (e) { }
  1169.       return null;
  1170.     };
  1171.  
  1172.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1173.  
  1174.       if (!EXPERIMENT_FLAGS) return;
  1175.  
  1176.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1177.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1178.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1179.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1180.         }
  1181.       }
  1182.  
  1183.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1184.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1185.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1186.       }
  1187.  
  1188.     };
  1189.  
  1190.     const uf = (EXPERIMENT_FLAGS) => {
  1191.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1192.       if (EXPERIMENT_FLAGS) {
  1193.         flagsFn(EXPERIMENT_FLAGS);
  1194.         flagsFn(flagsForced());
  1195.       }
  1196.     }
  1197.  
  1198.     uf();
  1199.  
  1200.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1201.  
  1202.       uf();
  1203.       let cidFlags = 0;
  1204.       let kd = 0;
  1205.       new Promise(flagResolve => {
  1206.  
  1207.         const flagTimer = () => {
  1208.           const EXPERIMENT_FLAGS = flags();
  1209.           if (!EXPERIMENT_FLAGS) return;
  1210.           uf(EXPERIMENT_FLAGS);
  1211.           if (kd > 0) return;
  1212.           kd = 1;
  1213.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1214.           const moDeferred = new Promise(resolve => {
  1215.             let mo = new MutationObserver(() => {
  1216.               if (mo) {
  1217.                 mo.disconnect();
  1218.                 mo.takeRecords();
  1219.                 mo = null;
  1220.                 resolve();
  1221.               }
  1222.             });
  1223.             mo.observe(document, { subtree: true, childList: true });
  1224.           });
  1225.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1226.         };
  1227.  
  1228.         uf();
  1229.         cidFlags = setInterval(flagTimer, 1);
  1230.       }).then(() => {
  1231.         if (cidFlags > 0) clearInterval(cidFlags);
  1232.         cidFlags = 0;
  1233.         uf();
  1234.       });
  1235.  
  1236.     }
  1237.  
  1238.     return flagsFnOnInterval;
  1239.  
  1240.   })() : null;
  1241.  
  1242.   let kptPF = null;
  1243.   const emojiPrefetched = new Set();
  1244.   const authorPhotoPrefetched = new Set();
  1245.  
  1246.   function linker(link, rel, href, _as){
  1247.     return new Promise(resolve=>{
  1248.       if (!link) link = document.createElement('link');
  1249.       link.rel = rel;
  1250.       if (_as) link.setAttribute('as', _as);
  1251.       link.onload = function () {
  1252.         resolve({
  1253.           link: this,
  1254.           success: true
  1255.         })
  1256.         this.remove();
  1257.       };
  1258.       link.onerror = function () {
  1259.         resolve({
  1260.           link: this,
  1261.           success: false
  1262.         });
  1263.         this.remove();
  1264.       };
  1265.       link.href = href;
  1266.       document.head.appendChild(link);
  1267.       link= null;
  1268.     });
  1269.   }
  1270.  
  1271.   cleanContext(win).then(__CONTEXT__ => {
  1272.     if (!__CONTEXT__) return null;
  1273.  
  1274.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate } = __CONTEXT__;
  1275.  
  1276.     let aeConstructor = null;
  1277.  
  1278.     // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  1279.     let pairForPauseResume = 0; // each increasion = number of ticker
  1280.     let pairForPauseResumeM = 0;
  1281.     // << end >>
  1282.  
  1283.     if(flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1284.  
  1285.     function basePrefetching() {
  1286.  
  1287.       new Promise(resolve => {
  1288.  
  1289.         if (document.readyState !== 'loading') {
  1290.           resolve();
  1291.         } else {
  1292.           win.addEventListener("DOMContentLoaded", resolve, false);
  1293.         }
  1294.  
  1295.       }).then(() => {
  1296.         const hostL1 = [
  1297.           'https://www.youtube.com', 'https://googlevideo.com',
  1298.           'https://googleapis.com', 'https://accounts.youtube.com',
  1299.           'https://www.gstatic.com', 'https://ggpht.com',
  1300.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1301.         ];
  1302.  
  1303.         const hostL2 = [
  1304.           'https://youtube.com',
  1305.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1306.         ];
  1307.  
  1308.         let link = null;
  1309.  
  1310.         function kn() {
  1311.  
  1312.           link = document.createElement('link');
  1313.           if (link.relList && link.relList.supports) {
  1314.             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)
  1315.           } else {
  1316.             kptPF = 0;
  1317.           }
  1318.  
  1319.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1320.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1321.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1322.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1323.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1324.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1325.           console.groupEnd();
  1326.  
  1327.         }
  1328.  
  1329.         for (const h of hostL1) {
  1330.  
  1331.           if (kptPF === null) kn();
  1332.           if (ENABLE_BASE_PREFETCHING) {
  1333.             // if (kptPF & 1) {
  1334.             //   linker(link, 'dns-prefetch', h);
  1335.             //   link = null;
  1336.             // }
  1337.             if (kptPF & 2) {
  1338.               linker(link, 'preconnect', h);
  1339.               link = null;
  1340.             }
  1341.           }
  1342.         }
  1343.  
  1344.         for (const h of hostL2) {
  1345.           if (kptPF === null) kn();
  1346.           if (ENABLE_BASE_PREFETCHING) {
  1347.             if (kptPF & 1) {
  1348.               linker(link, 'dns-prefetch', h);
  1349.               link = null;
  1350.             }
  1351.           }
  1352.         }
  1353.  
  1354.       })
  1355.  
  1356.  
  1357.     }
  1358.  
  1359.     basePrefetching();
  1360.  
  1361.     (() => {
  1362.       // data manipulation
  1363.  
  1364.       if (!DO_PARTICIPANT_LIST_HACKS) return;
  1365.  
  1366.       class Mutex {
  1367.  
  1368.         constructor() {
  1369.           this.p = Promise.resolve()
  1370.         }
  1371.  
  1372.         /**
  1373.          *  @param {(lockResolve: () => void)} f
  1374.          */
  1375.         lockWith(f) {
  1376.           this.p = this.p.then(() => new Promise(f).catch(console.warn))
  1377.         }
  1378.  
  1379.       }
  1380.  
  1381.  
  1382.       /**
  1383.  
  1384.        h.onParticipantsChanged = function() {
  1385.           this.notifyPath("participantsManager.participants")
  1386.       }
  1387.  
  1388.  
  1389.       at h.onParticipantsChanged (live_chat_polymer.js:8334:41)
  1390.       at e.<anonymous> (live_chat_polymer.js:1637:69)
  1391.       at e.Bb [as __shady_dispatchEvent] (webcomponents-sd.js:46:110)
  1392.       at k.dispatchEvent (webcomponents-sd.js:122:237)
  1393.       at mu (live_chat_polymer.js:1677:71)
  1394.       at Object.wga [as fn] (live_chat_polymer.js:1678:99)
  1395.       at a._propertiesChanged (live_chat_polymer.js:1726:426)
  1396.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1397.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1398.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1399.  
  1400.       */
  1401.  
  1402.  
  1403.       const beforeParticipantsMap = new WeakMap();
  1404.  
  1405.       const { notifyPath7081 } = (() => {
  1406.  
  1407.         const mutexParticipants = new Mutex();
  1408.  
  1409.         let uvid = 0;
  1410.         let r95dm = 0;
  1411.         let c95dm = -1;
  1412.  
  1413.         const foundMap = (base, content) => {
  1414.           /*
  1415.             let lastSearch = 0;
  1416.             let founds = base.map(baseEntry => {
  1417.               let search = content.indexOf(baseEntry, lastSearch);
  1418.               if (search < 0) return false;
  1419.               lastSearch = search + 1;
  1420.               return true;
  1421.             });
  1422.             return founds;
  1423.           */
  1424.           const contentSet = new Set(content);
  1425.           return base.map(baseEntry => contentSet.has(baseEntry));
  1426.  
  1427.         }
  1428.  
  1429.  
  1430.  
  1431.         const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1432.  
  1433.           const handler1 = {
  1434.             get(target, prop, receiver) {
  1435.               if (prop === 'object') {
  1436.                 return participants; // avoid memory leakage
  1437.               }
  1438.               if (prop === 'type') {
  1439.                 return 'splice';
  1440.               }
  1441.               return target[prop];
  1442.             }
  1443.           };
  1444.           const releaser = () => {
  1445.             participants = null;
  1446.           }
  1447.  
  1448.           let foundsForAfter = foundMap(idsAfter, idsBefore);
  1449.           let foundsForBefore = foundMap(idsBefore, idsAfter);
  1450.  
  1451.           let indexSplices = [];
  1452.           let contentUpdates = [];
  1453.           for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1454.             if (beforeParticipants[i] === participants[j]) {
  1455.               i++; j++;
  1456.             } else if (idsBefore[i] === idsAfter[j]) {
  1457.               // content changed
  1458.               contentUpdates.push({ indexI: i, indexJ: j })
  1459.               i++; j++;
  1460.             } else {
  1461.               let addedCount = 0;
  1462.               for (let q = j; q < foundsForAfter.length; q++) {
  1463.                 if (foundsForAfter[q] === false) addedCount++;
  1464.                 else break;
  1465.               }
  1466.               let removedCount = 0;
  1467.               for (let q = i; q < foundsForBefore.length; q++) {
  1468.                 if (foundsForBefore[q] === false) removedCount++;
  1469.                 else break;
  1470.               }
  1471.               if (!addedCount && !removedCount) {
  1472.                 throw 'ERROR(0xFF32): spliceIndicesFunc';
  1473.               }
  1474.               indexSplices.push(new Proxy({
  1475.                 index: j,
  1476.                 addedCount: addedCount,
  1477.                 removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1478.               }, handler1));
  1479.               i += removedCount;
  1480.               j += addedCount;
  1481.             }
  1482.           }
  1483.           foundsForBefore = null;
  1484.           foundsForAfter = null;
  1485.           idsBefore = null;
  1486.           idsAfter = null;
  1487.           beforeParticipants = null;
  1488.           return { indexSplices, contentUpdates, releaser };
  1489.  
  1490.         }
  1491.  
  1492.         /*
  1493.  
  1494.         customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1495.  
  1496.         VM63631:1 Error
  1497.         at customElements.get.notifyPath (<anonymous>:1:122)
  1498.         at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1499.         at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1500.         at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1501.         at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1502.         at ju (live_chat_polymer.js:1674:217)
  1503.         at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1504.         at b._flushProperties (live_chat_polymer.js:1597:200)
  1505.         at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1506.         at a.notifyPath (live_chat_polymer.js:1741:182)
  1507.  
  1508.         */
  1509.  
  1510.         function convertToIds(participants) {
  1511.           return participants.map(participant => {
  1512.             if (!participant || typeof participant !== 'object') {
  1513.               console.warn('Error(0xFA41): convertToIds', participant);
  1514.               return participant; // just in case
  1515.             }
  1516.             let keys = Object.keys(participant);
  1517.             // liveChatTextMessageRenderer
  1518.             // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1519.             // liveChatPaidMessageRenderer
  1520.             /*
  1521.  
  1522.               'yt-live-chat-participant-renderer' utilizes the following:
  1523.               authorName.simpleText: string
  1524.               authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1525.               authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1526.               authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1527.               authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1528.  
  1529.             */
  1530.             if (keys.length !== 1) {
  1531.               console.warn('Error(0xFA42): convertToIds', participant);
  1532.               return participant; // just in case
  1533.             }
  1534.             let key = keys[0];
  1535.             let renderer = (participant[key] || 0);
  1536.             let authorName = (renderer.authorName || 0);
  1537.             let text = `${authorName.simpleText || authorName.text}`
  1538.             let res = participant; // fallback if it is not a vaild entry
  1539.             if (typeof text !== 'string') {
  1540.               console.warn('Error(0xFA53): convertToIds', participant);
  1541.             } else {
  1542.               text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1543.               if (text.length > 1) res = text;
  1544.             }
  1545.             return res;
  1546.             // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1547.             // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1548.           });
  1549.         }
  1550.  
  1551.         const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1552.           // just update when content is changed.
  1553.           if (p1.authorName !== p2.authorName) return true;
  1554.           if (p1.authorPhoto !== p2.authorPhoto) return true;
  1555.           if (p1.authorBadges !== p2.authorBadges) return true;
  1556.           return false;
  1557.         } : (p1, p2) => {
  1558.           // keep integrity all the time.
  1559.           return p1 !== p2; // always true
  1560.         }
  1561.  
  1562.         function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1563.  
  1564.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1565.             if (path !== "participantsManager.participants") {
  1566.               return this.__notifyPath5036__.apply(this, arguments);
  1567.             }
  1568.             if (c95dm === r95dm) return;
  1569.           } else {
  1570.             const stack = new Error().stack;
  1571.             if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1572.               return this.__notifyPath5036__.apply(this, arguments);
  1573.             }
  1574.           }
  1575.  
  1576.           if (uvid > 1e8) uvid = uvid % 100;
  1577.           let tid = ++uvid;
  1578.  
  1579.           const cnt = this; // "yt-live-chat-participant-list-renderer"
  1580.           mutexParticipants.lockWith(lockResolve => {
  1581.  
  1582.             const participants00 = cnt.participantsManager.participants;
  1583.  
  1584.             if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1585.               lockResolve();
  1586.               return;
  1587.             }
  1588.  
  1589.             let doUpdate = false;
  1590.  
  1591.             if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1592.  
  1593.               if (!participants00.r94dm) {
  1594.                 participants00.r94dm = 1;
  1595.                 if (++r95dm > 1e9) r95dm = 9;
  1596.                 participants00.push = function () {
  1597.                   if (++r95dm > 1e9) r95dm = 9;
  1598.                   return Array.prototype.push.apply(this, arguments);
  1599.                 }
  1600.                 participants00.pop = function () {
  1601.                   if (++r95dm > 1e9) r95dm = 9;
  1602.                   return Array.prototype.pop.apply(this, arguments);
  1603.                 }
  1604.                 participants00.shift = function () {
  1605.                   if (++r95dm > 1e9) r95dm = 9;
  1606.                   return Array.prototype.shift.apply(this, arguments);
  1607.                 }
  1608.                 participants00.unshift = function () {
  1609.                   if (++r95dm > 1e9) r95dm = 9;
  1610.                   return Array.prototype.unshift.apply(this, arguments);
  1611.                 }
  1612.                 participants00.splice = function () {
  1613.                   if (++r95dm > 1e9) r95dm = 9;
  1614.                   return Array.prototype.splice.apply(this, arguments);
  1615.                 }
  1616.                 participants00.sort = function () {
  1617.                   if (++r95dm > 1e9) r95dm = 9;
  1618.                   return Array.prototype.sort.apply(this, arguments);
  1619.                 }
  1620.                 participants00.reverse = function () {
  1621.                   if (++r95dm > 1e9) r95dm = 9;
  1622.                   return Array.prototype.reverse.apply(this, arguments);
  1623.                 }
  1624.               }
  1625.  
  1626.               if (c95dm !== r95dm) {
  1627.                 c95dm = r95dm;
  1628.                 doUpdate = true;
  1629.               }
  1630.  
  1631.             } else {
  1632.               doUpdate = true;
  1633.             }
  1634.  
  1635.             if (!doUpdate) {
  1636.               lockResolve();
  1637.               return;
  1638.             }
  1639.  
  1640.             const participants = participants00.slice(0);
  1641.             const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1642.             beforeParticipantsMap.set(cnt, participants);
  1643.  
  1644.             const resPromise = (async () => {
  1645.  
  1646.               if (beforeParticipants.length === 0) {
  1647.                 // not error
  1648.                 return 0;
  1649.               }
  1650.  
  1651.               let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1652.  
  1653.               // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1654.               if (beforeParticipants.length !== countOfElements) {
  1655.                 // there is somewrong for the cache. - sometimes happen
  1656.                 return 0;
  1657.               }
  1658.  
  1659.               const idsBefore = convertToIds(beforeParticipants);
  1660.               const idsAfter = convertToIds(participants);
  1661.  
  1662.               let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1663.  
  1664.               let res = 1; // default 1 for no update
  1665.  
  1666.               if (indexSplices.length >= 1) {
  1667.  
  1668.  
  1669.                 // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1670.                 // let p1 = indexSplices[0].removed;
  1671.                 // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1672.  
  1673.                 /* folllow
  1674.                     a.notifyPath(c + ".splices", d);
  1675.                     a.notifyPath(c + ".length", b.length);
  1676.                 */
  1677.                 // stampDomArraySplices_
  1678.  
  1679.  
  1680.                 await new Promise(resolve => {
  1681.                   cnt.resolveForDOMRendering781 = resolve;
  1682.  
  1683.                   cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1684.                     indexSplices
  1685.                   });
  1686.                   indexSplices = null;
  1687.                   releaser();
  1688.                   releaser = null;
  1689.                   cnt.__notifyPath5036__("participantsManager.participants.length",
  1690.                     participants.length
  1691.                   );
  1692.  
  1693.                 });
  1694.  
  1695.                 await Promise.resolve(0); // play safe for the change of 'length'
  1696.                 countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1697.  
  1698.                 let wrongSize = participants.length !== countOfElements
  1699.                 if (wrongSize) {
  1700.                   console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1701.                   return 0;
  1702.                 }
  1703.  
  1704.                 res = 2 | 4;
  1705.  
  1706.               } else {
  1707.  
  1708.                 indexSplices = null;
  1709.                 releaser();
  1710.                 releaser = null;
  1711.  
  1712.                 if (participants.length !== countOfElements) {
  1713.                   // other unhandled cases
  1714.                   return 0;
  1715.                 }
  1716.  
  1717.               }
  1718.  
  1719.               // participants.length === countOfElements before contentUpdates
  1720.               if (contentUpdates.length >= 1) {
  1721.                 for (const contentUpdate of contentUpdates) {
  1722.                   let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1723.                   if (isChanged) {
  1724.                     cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1725.                     res |= 4 | 8;
  1726.                   }
  1727.                 }
  1728.               }
  1729.               contentUpdates = null;
  1730.  
  1731.               return res;
  1732.  
  1733.  
  1734.             })();
  1735.  
  1736.  
  1737.             resPromise.then(resValue => {
  1738.  
  1739.               const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1740.               isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1741.               if (resValue === 0) {
  1742.                 new Promise(resolve => {
  1743.                   cnt.resolveForDOMRendering781 = resolve;
  1744.                   isLogRequired && console.log("Full Refresh begins");
  1745.                   cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1746.                 }).then(() => {
  1747.                   isLogRequired && console.log("Full Refresh ends");
  1748.                   console.groupEnd();
  1749.                 }).then(lockResolve);
  1750.                 return;
  1751.               }
  1752.  
  1753.               const delayLockResolve = (resValue & 4) === 4;
  1754.  
  1755.               if (delayLockResolve) {
  1756.                 isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1757.                 isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1758.                 isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1759.                 isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1760.                 isLogRequired && console.groupEnd();
  1761.                 // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1762.                 // mutex lock with requestAnimationFrame can also disable participants update in background
  1763.                 requestAnimationFrame(lockResolve);
  1764.               } else {
  1765.                 lockResolve();
  1766.               }
  1767.  
  1768.             });
  1769.  
  1770.           });
  1771.  
  1772.         }
  1773.  
  1774.         return { notifyPath7081 };
  1775.  
  1776.       })();
  1777.  
  1778.  
  1779.       const onRegistryReadyForDataManipulation = () => {
  1780.  
  1781.         function dummy5035(a, b, c) { }
  1782.         function dummy411(a, b, c) { }
  1783.  
  1784.  
  1785.         if (REMOVE_PRELOADAVATARFORADDACTION) {
  1786.  
  1787.           customElements.whenDefined("yt-live-chat-renderer").then(() => {
  1788.  
  1789.             const tag = "yt-live-chat-renderer";
  1790.             const cProto = getProto(document.createElement(tag));
  1791.  
  1792.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  1793.  
  1794.             if (typeof cProto.preloadAvatarForAddAction === 'function' && !cProto.preloadAvatarForAddAction66 && cProto.preloadAvatarForAddAction.length === 1) {
  1795.  
  1796.               cProto.preloadAvatarForAddAction66 = cProto.preloadAvatarForAddAction;
  1797.               cProto.preloadAvatarForAddAction = function () {
  1798.                 //  ===== skip  =====
  1799.  
  1800.                 // if (a.item) {
  1801.                 //   a = a.item;
  1802.                 //   var b = Object.keys(a)[0];
  1803.                 //   a = a[b];
  1804.                 //   b = KC(this.get("authorPhoto.thumbnails", a), 24);
  1805.                 //   "string" === typeof b && (this.preloadImage(b),
  1806.                 //     a.authorPhoto.webThumbnailDetailsExtensionData = {
  1807.                 //       isPreloaded: !0
  1808.                 //     })
  1809.                 // }
  1810.  
  1811.                 //  ===== skip  =====
  1812.               }
  1813.               console.log("cProto.preloadAvatarForAddAction - OK");
  1814.             } else {
  1815.               console.log("cProto.preloadAvatarForAddAction - NG");
  1816.  
  1817.             }
  1818.             console.groupEnd();
  1819.  
  1820.             // cProto.preloadImage = function (){
  1821.             //   // although we do in flushItem; just avoid being used by other usages ...
  1822.             // }
  1823.  
  1824.           });
  1825.  
  1826.         }
  1827.  
  1828.  
  1829.         customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1830.  
  1831.           if (!DO_PARTICIPANT_LIST_HACKS) return;
  1832.  
  1833.           const tag = "yt-live-chat-participant-list-renderer";
  1834.           const cProto = getProto(document.createElement(tag));
  1835.           if (!cProto || typeof cProto.attached !== 'function') {
  1836.             // for _registered, proto.attached shall exist when the element is defined.
  1837.             // for controller extraction, attached shall exist when instance creates.
  1838.             console.warn(`proto.attached for ${tag} is unavailable.`);
  1839.             return;
  1840.           }
  1841.  
  1842.  
  1843.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1844.  
  1845.           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'];
  1846.           const fgs = {};
  1847.           for (const key of fgsArr) fgs[key] = undefined;
  1848.  
  1849.           try {
  1850.             const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1851.             for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1852.           } catch (e) { }
  1853.           console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1854.  
  1855.           const canDoReplacement = (() => {
  1856.             if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1857.               console.warn('YouTube Live Chat Tamer is running.');
  1858.               return;
  1859.             }
  1860.  
  1861.             if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  1862.               console.warn('YouTube Live Chat Tamer is running.');
  1863.               return;
  1864.             }
  1865.  
  1866.             cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  1867.             cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  1868.  
  1869.             if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  1870.               console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  1871.               return;
  1872.             }
  1873.  
  1874.             if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  1875.               console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  1876.               return;
  1877.             }
  1878.  
  1879.             if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  1880.               console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  1881.               return;
  1882.             }
  1883.             return true;
  1884.           })();
  1885.  
  1886.           console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  1887.  
  1888.           assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  1889.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1890.             let fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  1891.             let s = fiRSCB.split('.');
  1892.             if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  1893.               console.log("flushRenderStamperComponentBindings_ - OK", fiRSCB);
  1894.             } else {
  1895.               console.log("flushRenderStamperComponentBindings_ - failed", fiRSCB);
  1896.             }
  1897.           } else {
  1898.             console.log("flushRenderStamperComponentBindings_ - not found");
  1899.           }
  1900.           // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  1901.  
  1902.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1903.             cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  1904.             cProto.flushRenderStamperComponentBindings_ = function () {
  1905.               // console.log('flushRenderStamperComponentBindings_')
  1906.               this.flushRenderStamperComponentBindings66_();
  1907.               if (this.resolveForDOMRendering781) {
  1908.                 this.resolveForDOMRendering781();
  1909.                 this.resolveForDOMRendering781 = null;
  1910.               }
  1911.             };
  1912.           }
  1913.  
  1914.           cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  1915.             const container = ((this || 0).$ || 0).participants;
  1916.             if (!container) return 0;
  1917.             return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  1918.           }
  1919.  
  1920.           const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  1921.  
  1922.           cProto.__attached412__ = cProto.attached;
  1923.           const fpPList = function (hostElement) {
  1924.             const cnt = hostElement.inst || hostElement;
  1925.             if (beforeParticipantsMap.has(cnt)) return;
  1926.             hostElement.classList.add('n9fJ3');
  1927.  
  1928.             assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  1929.             if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  1930.               console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  1931.               return;
  1932.             }
  1933.  
  1934.             groupCollapsed("Participant List attached", "");
  1935.             // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  1936.             //   console.log(123, 'appendChild');
  1937.             //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  1938.             // }
  1939.  
  1940.             // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  1941.             //   console.log(123, 'insertBefore');
  1942.             //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  1943.             // }
  1944.  
  1945.             cnt.__notifyPath5036__ = cnt.notifyPath
  1946.             const participants = ((cnt.participantsManager || 0).participants || 0);
  1947.             assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  1948.             console.log(`initial number of participants: ${participants.length}`);
  1949.             const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  1950.             beforeParticipantsMap.set(cnt, newParticipants);
  1951.             cnt.notifyPath = notifyPath7081;
  1952.             console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  1953.             console.groupEnd();
  1954.           }
  1955.           cProto.attached = function () {
  1956.             fpPList(this.hostElement || this);
  1957.             this.__attached412__.apply(this, arguments);
  1958.           };
  1959.  
  1960.  
  1961.           if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  1962.  
  1963.             /** @type {boolean | (()=>boolean)} */
  1964.             let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  1965.             if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  1966.  
  1967.               let lastMessageDate = 0;
  1968.               cProto.stampDomArray66_ = cProto.stampDomArray_;
  1969.  
  1970.               cProto.stampDomArray_ = function (...args) {
  1971.                 if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  1972.                   if (typeof toUseMaintainStableList === 'function') {
  1973.                     toUseMaintainStableList = toUseMaintainStableList();
  1974.                   }
  1975.                   args[5] = toUseMaintainStableList;
  1976.                   let currentDate = Date.now();
  1977.                   if (currentDate - lastMessageDate > 80) {
  1978.                     lastMessageDate = currentDate;
  1979.                     console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  1980.                   }
  1981.                 }
  1982.                 return this.stampDomArray66_.apply(this, args);
  1983.               }
  1984.  
  1985.               cProto.stampDomArray_.nIegT = 1;
  1986.  
  1987.             }
  1988.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  1989.           } else {
  1990.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  1991.           }
  1992.  
  1993.           console.groupEnd();
  1994.  
  1995.           if (onPageElements.length >= 1) {
  1996.             for (const s of onPageElements) {
  1997.               if ((s.inst || s).isAttached === true) {
  1998.                 fpPList(s);
  1999.               }
  2000.             }
  2001.           }
  2002.  
  2003.         });
  2004.  
  2005.       };
  2006.  
  2007.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2008.  
  2009.  
  2010.     })();
  2011.  
  2012.     IntersectionObserver && (() => {
  2013.  
  2014.       // dom manipulation
  2015.  
  2016.       class RAFHub {
  2017.         constructor() {
  2018.           /** @type {number} */
  2019.           this.startAt = 8170;
  2020.           /** @type {number} */
  2021.           this.counter = 0;
  2022.           /** @type {number} */
  2023.           this.rid = 0;
  2024.           /** @type {Map<number, FrameRequestCallback>} */
  2025.           this.funcs = new Map();
  2026.           const funcs = this.funcs;
  2027.           /** @type {FrameRequestCallback} */
  2028.           this.bCallback = this.mCallback.bind(this);
  2029.           this.pClear = () => funcs.clear();
  2030.         }
  2031.         /** @param {DOMHighResTimeStamp} highResTime */
  2032.         mCallback(highResTime) {
  2033.           this.rid = 0;
  2034.           Promise.resolve().then(this.pClear);
  2035.           this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  2036.         }
  2037.         /** @param {FrameRequestCallback} f */
  2038.         request(f) {
  2039.           if (this.counter > 1e9) this.counter = 9;
  2040.           let cid = this.startAt + (++this.counter);
  2041.           this.funcs.set(cid, f);
  2042.           if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  2043.           return cid;
  2044.         }
  2045.         /** @param {number} cid */
  2046.         cancel(cid) {
  2047.           cid = +cid;
  2048.           if (cid > 0) {
  2049.             if (cid <= this.startAt) {
  2050.               return cancelAnimationFrame(cid);
  2051.             }
  2052.             if (this.rid > 0) {
  2053.               this.funcs.delete(cid);
  2054.               if (this.funcs.size === 0) {
  2055.                 cancelAnimationFrame(this.rid);
  2056.                 this.rid = 0;
  2057.               }
  2058.             }
  2059.           }
  2060.         }
  2061.       }
  2062.  
  2063.  
  2064.       const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2065.  
  2066.  
  2067.       let dt0 = Date.now() - 2000;
  2068.       const dateNow = () => Date.now() - dt0;
  2069.       // let lastScroll = 0;
  2070.       // let lastLShow = 0;
  2071.       let lastWheel = 0;
  2072.       let lastMouseDown = 0;
  2073.       let lastMouseUp = 0;
  2074.       let currentMouseDown = false;
  2075.       let lastTouchDown = 0;
  2076.       let lastTouchUp = 0;
  2077.       let currentTouchDown = false;
  2078.       let lastUserInteraction = 0;
  2079.  
  2080.       let scrollChatFn = null;
  2081.  
  2082.       let skipDontRender = true; // true first; false by flushActiveItems_
  2083.       let allowDontRender = null;
  2084.  
  2085.       ENABLE_DELAYED_CHAT_OCCURRENCE && (() => {
  2086.  
  2087.         document.addEventListener('animationstart', (evt) => {
  2088.  
  2089.           if (evt.animationName === 'dontRenderAnimation') {
  2090.             evt.target.classList.remove('dont-render');
  2091.             if (scrollChatFn) scrollChatFn();
  2092.           }
  2093.  
  2094.         }, true);
  2095.  
  2096.         const f = (elm) => {
  2097.           if (elm && elm.nodeType === 1) {
  2098.             if (!skipDontRender && allowDontRender === true) {
  2099.               // innerTextFixFn();
  2100.               elm.classList.add('dont-render');
  2101.             }
  2102.           }
  2103.         }
  2104.  
  2105.         Node.prototype.__appendChild931__ = function (a) {
  2106.           a = dr(a);
  2107.           if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2108.             if (a && a.nodeType === 1) f(a);
  2109.             else if (a instanceof DocumentFragment) {
  2110.               for (let n = a.firstChild; n; n = n.nextSibling) {
  2111.                 f(n);
  2112.               }
  2113.             }
  2114.           }
  2115.         }
  2116.  
  2117.         Node.prototype.__appendChild932__ = function () {
  2118.           this.__appendChild931__.apply(this, arguments);
  2119.           return Node.prototype.appendChild.apply(this, arguments);
  2120.         }
  2121.  
  2122.  
  2123.       })();
  2124.  
  2125.  
  2126.       const watchUserCSS = () => {
  2127.  
  2128.         // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2129.  
  2130.         const getElemFromWR = (nr) => {
  2131.           const n = kRef(nr);
  2132.           if (n && n.isConnected) return n;
  2133.           return null;
  2134.         }
  2135.  
  2136.         const clearContentVisibilitySizing = () => {
  2137.           Promise.resolve().then(() => {
  2138.  
  2139.             let btnShowMoreWR = mWeakRef(document.querySelector('#show-more[disabled]'));
  2140.  
  2141.             let lastVisibleItemWR = null;
  2142.             for (const elm of document.querySelectorAll('[wSr93]')) {
  2143.               if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2144.               elm.setAttribute('wSr93', '');
  2145.               // custom CSS property --wsr94 not working when attribute wSr93 removed
  2146.             }
  2147.             requestAnimationFrame(() => {
  2148.               const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2149.               if (btnShowMore) btnShowMore.click();
  2150.               else {
  2151.                 // would not work if switch it frequently
  2152.                 const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2153.                 if (lastVisibleItem) {
  2154.  
  2155.                   Promise.resolve()
  2156.                     .then(() => lastVisibleItem.scrollIntoView())
  2157.                     .then(() => lastVisibleItem.scrollIntoView(false))
  2158.                     .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2159.                     .catch(e => { }) // break the chain when method not callable
  2160.  
  2161.                 }
  2162.               }
  2163.             });
  2164.  
  2165.           });
  2166.  
  2167.         }
  2168.  
  2169.         const mutObserver = new MutationObserver((mutations) => {
  2170.           for (const mutation of mutations) {
  2171.             if ((mutation.addedNodes || 0).length >= 1) {
  2172.               for (const addedNode of mutation.addedNodes) {
  2173.                 if (addedNode.nodeName === 'STYLE') {
  2174.                   clearContentVisibilitySizing();
  2175.                   return;
  2176.                 }
  2177.               }
  2178.             }
  2179.             if ((mutation.removedNodes || 0).length >= 1) {
  2180.               for (const removedNode of mutation.removedNodes) {
  2181.                 if (removedNode.nodeName === 'STYLE') {
  2182.                   clearContentVisibilitySizing();
  2183.                   return;
  2184.                 }
  2185.               }
  2186.             }
  2187.           }
  2188.         });
  2189.  
  2190.         mutObserver.observe(document.documentElement, {
  2191.           childList: true,
  2192.           subtree: false
  2193.         });
  2194.         mutObserver.observe(document.head, {
  2195.           childList: true,
  2196.           subtree: false
  2197.         });
  2198.         mutObserver.observe(document.body, {
  2199.           childList: true,
  2200.           subtree: false
  2201.         });
  2202.  
  2203.       }
  2204.  
  2205.  
  2206.       class WillChangeController {
  2207.         constructor(itemScroller, willChangeValue) {
  2208.           this.element = itemScroller;
  2209.           this.counter = 0;
  2210.           this.active = false;
  2211.           this.willChangeValue = willChangeValue;
  2212.         }
  2213.  
  2214.         beforeOper() {
  2215.           if (!this.active) {
  2216.             this.active = true;
  2217.             this.element.style.willChange = this.willChangeValue;
  2218.           }
  2219.           this.counter++;
  2220.         }
  2221.  
  2222.         afterOper() {
  2223.           const c = this.counter;
  2224.           requestAnimationFrame(() => {
  2225.             if (c === this.counter) {
  2226.               this.active = false;
  2227.               this.element.style.willChange = '';
  2228.             }
  2229.           });
  2230.         }
  2231.  
  2232.         release() {
  2233.           const element = this.element;
  2234.           this.element = null;
  2235.           this.counter = 1e16;
  2236.           this.active = false;
  2237.           try {
  2238.             element.style.willChange = '';
  2239.           } catch (e) { }
  2240.         }
  2241.  
  2242.       }
  2243.  
  2244.  
  2245.       const { lcRendererElm, visObserver } = (() => {
  2246.  
  2247.  
  2248.  
  2249.         let lcRendererWR = null;
  2250.  
  2251.         const lcRendererElm = () => {
  2252.           let lcRenderer = kRef(lcRendererWR);
  2253.           if (!lcRenderer || !lcRenderer.isConnected) {
  2254.             lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2255.             lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2256.           }
  2257.           return lcRenderer;
  2258.         };
  2259.  
  2260.  
  2261.         let hasFirstShowMore = false;
  2262.  
  2263.         const visObserverFn = (entry) => {
  2264.  
  2265.           const target = entry.target;
  2266.           if (!target) return;
  2267.           // if(target.classList.contains('dont-render')) return;
  2268.           let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2269.           // const h = entry.boundingClientRect.height;
  2270.           /*
  2271.           if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2272.               // e.g. under fullscreen. the element created but not rendered.
  2273.               target.setAttribute('wSr93', '');
  2274.               return;
  2275.           }
  2276.           */
  2277.           if (isVisible) {
  2278.             // target.style.setProperty('--wsr94', h + 'px');
  2279.             target.setAttribute('wSr93', 'visible');
  2280.             if (nNextElem(target) === null) {
  2281.  
  2282.               // firstVisibleItemDetected = true;
  2283.               /*
  2284.                 if (dateNow() - lastScroll < 80) {
  2285.                     lastLShow = 0;
  2286.                     lastScroll = 0;
  2287.                     Promise.resolve().then(clickShowMore);
  2288.                 } else {
  2289.                     lastLShow = dateNow();
  2290.                 }
  2291.                 */
  2292.               // lastLShow = dateNow();
  2293.             } else if (!hasFirstShowMore) { // should more than one item being visible
  2294.               // implement inside visObserver to ensure there is sufficient delay
  2295.               hasFirstShowMore = true;
  2296.               requestAnimationFrame(() => {
  2297.                 // foreground page
  2298.                 // page visibly ready -> load the latest comments at initial loading
  2299.                 const lcRenderer = lcRendererElm();
  2300.                 if (lcRenderer) {
  2301.                   (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2302.                 }
  2303.               });
  2304.             }
  2305.           }
  2306.           else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2307.  
  2308.             // target.style.setProperty('--wsr94', h + 'px');
  2309.             target.setAttribute('wSr93', 'hidden');
  2310.           } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2311.  
  2312.         }
  2313.  
  2314.  
  2315.  
  2316.         const visObserver = new IntersectionObserver((entries) => {
  2317.  
  2318.           for (const entry of entries) {
  2319.  
  2320.             Promise.resolve(entry).then(visObserverFn);
  2321.  
  2322.           }
  2323.  
  2324.         }, {
  2325.           // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2326.           rootMargin: "0px",
  2327.           threshold: [0.05, 0.95],
  2328.         });
  2329.  
  2330.  
  2331.         return { lcRendererElm, visObserver }
  2332.  
  2333.  
  2334.       })();
  2335.  
  2336.       let sk35zResolveFn = null;
  2337.  
  2338.       let firstList = true;
  2339.  
  2340.       const { setupMutObserver } = (() => {
  2341.  
  2342.         const mutFn = (items) => {
  2343.           for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2344.             if (node.hasAttribute('wSr93')) break;
  2345.             node.setAttribute('wSr93', '');
  2346.             visObserver.observe(node);
  2347.           }
  2348.         }
  2349.  
  2350.         const mutObserver = new MutationObserver((mutations) => {
  2351.           const items = (mutations[0] || 0).target;
  2352.           if (!items) return;
  2353.           if (sk35zResolveFn) {
  2354.             sk35zResolveFn();
  2355.             sk35zResolveFn = null;
  2356.           }
  2357.           mutFn(items);
  2358.         });
  2359.  
  2360.         const setupMutObserver = (m2) => {
  2361.           scrollChatFn = null;
  2362.           mutObserver.disconnect();
  2363.           mutObserver.takeRecords();
  2364.           if (m2) {
  2365.             if (typeof m2.__appendChild932__ === 'function') {
  2366.               if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2367.               if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2368.             }
  2369.             mutObserver.observe(m2, {
  2370.               childList: true,
  2371.               subtree: false
  2372.             });
  2373.             mutFn(m2);
  2374.  
  2375.             let isFirstList = firstList;
  2376.             firstList = false;
  2377.  
  2378.             if (ENABLE_OVERFLOW_ANCHOR) {
  2379.  
  2380.               let items = m2;
  2381.               let addedAnchor = false;
  2382.               if (items) {
  2383.                 if (items.nextElementSibling === null) {
  2384.                   items.classList.add('no-anchor');
  2385.                   addedAnchor = true;
  2386.                   items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2387.                 }
  2388.               }
  2389.  
  2390.  
  2391.  
  2392.               if (addedAnchor) {
  2393.                 nodeParent(m2).classList.add('no-anchor'); // required
  2394.               }
  2395.  
  2396.             }
  2397.  
  2398.             // let div = document.createElement('div');
  2399.             // div.id = 'qwcc';
  2400.             // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2401.             // bufferRegion =div;
  2402.  
  2403.             // buffObserver.takeRecords();
  2404.             // buffObserver.disconnect();
  2405.             // buffObserver.observe(div,  {
  2406.             //     childList: true,
  2407.             //     subtree: false
  2408.             // })
  2409.  
  2410.             if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2411.  
  2412.               promiseForCustomYtElementsReady.then(() => {
  2413.  
  2414.                 customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2415.  
  2416.                   setTimeout(() => {
  2417.  
  2418.                     /** @type {HTMLTemplateElement} */
  2419.                     let skz = document.createElement('yt-live-chat-text-message-renderer');
  2420.  
  2421.                     let cz1 = null;
  2422.  
  2423.                     if (skz && 'data' in skz && 'attached' in skz) {
  2424.  
  2425.                       const deferredZy1 = new Promise(resolve => {
  2426.  
  2427.                         skz.attached = function () {
  2428.                           cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2429.                           resolve(skz.textContent);
  2430.                         }
  2431.                         skz.detached = function () {
  2432.  
  2433.                         }
  2434.  
  2435.                       });
  2436.                       skz.id = 'sk35z';
  2437.                       skz.data = {
  2438.                         "message": {
  2439.                           "runs": [
  2440.                             {
  2441.                               "text": "em2o"
  2442.                             },
  2443.                             {
  2444.                               "emoji": {
  2445.                                 "emojiId": "cm35z",
  2446.                                 "shortcuts": [
  2447.                                   ":_s:",
  2448.                                   ":s:"
  2449.                                 ],
  2450.                                 "searchTerms": [
  2451.                                   "_s",
  2452.                                   "s"
  2453.                                 ],
  2454.                                 "image": {
  2455.                                   "thumbnails": [
  2456.                                     {
  2457.                                       "url": "data:image/webp;base64,UklGRjAB",
  2458.                                       "width": 48,
  2459.                                       "height": 48
  2460.                                     }
  2461.                                   ],
  2462.                                   "accessibility": {
  2463.                                     "accessibilityData": {
  2464.                                       "label": "s"
  2465.                                     }
  2466.                                   }
  2467.                                 },
  2468.                                 "isCustomEmoji": true
  2469.                               }
  2470.                             },
  2471.                             {
  2472.                               "text": "ji"
  2473.                             }
  2474.                           ]
  2475.                         },
  2476.                         "authorName": {
  2477.                           "simpleText": "N"
  2478.                         },
  2479.                         "authorPhoto": {
  2480.                           "thumbnails": [
  2481.                             {
  2482.                               "url": "data:image/webp;base64,UklGRjAB",
  2483.                               "width": 64,
  2484.                               "height": 64
  2485.                             }
  2486.                           ]
  2487.                         },
  2488.                         "contextMenuEndpoint": {
  2489.                           "commandMetadata": {
  2490.                             "webCommandMetadata": {
  2491.                               "ignoreNavigation": true
  2492.                             }
  2493.                           },
  2494.                           "liveChatItemContextMenuEndpoint": {
  2495.                             "params": "123=="
  2496.                           }
  2497.                         },
  2498.                         "id": "sk35z",
  2499.                         "timestampUsec": "1232302352350000",
  2500.                         "authorBadges": [
  2501.                           {
  2502.                             "liveChatAuthorBadgeRenderer": {
  2503.                               "customThumbnail": {
  2504.                                 "thumbnails": [
  2505.                                   {
  2506.                                     "url": "data:image/webp;base64,UklGRjAB",
  2507.                                     "width": 16,
  2508.                                     "height": 16
  2509.                                   },
  2510.                                   {
  2511.                                     "url": "data:image/webp;base64,UklGRjAB",
  2512.                                     "width": 32,
  2513.                                     "height": 32
  2514.                                   }
  2515.                                 ]
  2516.                               },
  2517.                               "tooltip": "T",
  2518.                               "accessibility": {
  2519.                                 "accessibilityData": {
  2520.                                   "label": "E"
  2521.                                 }
  2522.                               }
  2523.                             }
  2524.                           }
  2525.                         ],
  2526.                         "authorExternalChannelId": "A",
  2527.                         "contextMenuAccessibility": {
  2528.                           "accessibilityData": {
  2529.                             "label": "E"
  2530.                           }
  2531.                         },
  2532.                         "timestampText": {
  2533.                           "simpleText": "0:43"
  2534.                         }
  2535.                       };
  2536.  
  2537.  
  2538.                       sk35zResolveFn = null;
  2539.                       const deferredMutation = new Promise(resolve => {
  2540.                         sk35zResolveFn = resolve;
  2541.                         HTMLElement.prototype.appendChild.call(m2, skz);
  2542.                       });
  2543.  
  2544.                       Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2545.                         const [zy1, _] = res;
  2546.                         function fn() {
  2547.                           const zy2 = skz.textContent;
  2548.                           const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2549.                           if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2550.                             allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2551.                           }
  2552.                           if (allowDontRender === false) {
  2553.  
  2554.                             console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2555.                               "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2556.                               "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2557.                             );
  2558.  
  2559.                             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');
  2560.  
  2561.                             console.groupEnd();
  2562.                           } else if (allowDontRender === true) {
  2563.                             return true;
  2564.                           }
  2565.                         }
  2566.                         await new Promise(r => setTimeout(r, 1));
  2567.                         if (fn()) {
  2568.                           await new Promise(r => requestAnimationFrame(r));
  2569.                           if (fn()) {
  2570.                             skz.remove();
  2571.                             skz.textContent = '';
  2572.                             console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #11ad44; color: #102624; padding: 2px 4px');
  2573.                           }
  2574.                         }
  2575.                       });
  2576.  
  2577.                     }
  2578.  
  2579.                   }, 1);
  2580.  
  2581.                 })
  2582.  
  2583.               })
  2584.  
  2585.             }
  2586.  
  2587.  
  2588.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2589.  
  2590.               (() => {
  2591.  
  2592.                 const tag = 'yt-iframed-player-events-relay'
  2593.                 const dummy = document.createElement(tag);
  2594.  
  2595.                 const cProto = getProto(dummy);
  2596.                 if (!cProto || !cProto.handlePostMessage_) {
  2597.                   console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2598.                   return;
  2599.                 }
  2600.  
  2601.                 if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2602.  
  2603.                   cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2604.  
  2605.                   cProto.handlePostMessage_ = function (a) {
  2606.  
  2607.                     const da = (a || 0).data || 0;
  2608.                     if (typeof da === 'object') {
  2609.  
  2610.                       // console.log('handlePostMessage_', da)
  2611.                       const qc = da['yt-player-state-change'];
  2612.                       if (qc === 3) { // pause
  2613.                         pairForPauseResume++;
  2614.                         pairForPauseResumeM++;
  2615.                       } else if (qc === 1) { // pause
  2616.                         pairForPauseResume++;
  2617.                         pairForPauseResumeM++;
  2618.                       } else if (qc === 2) {
  2619.                         pairForPauseResume++;
  2620.                         pairForPauseResumeM++;
  2621.                       }
  2622.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  2623.                       if (pairForPauseResumeM > 1e9) pairForPauseResumeM = pairForPauseResumeM % 1e4;
  2624.                       return this.handlePostMessage66_(a);
  2625.  
  2626.                     }
  2627.  
  2628.  
  2629.                   }
  2630.  
  2631.                 }
  2632.  
  2633.  
  2634.               })();
  2635.  
  2636.             }
  2637.  
  2638.  
  2639.           }
  2640.         }
  2641.  
  2642.         return { setupMutObserver };
  2643.  
  2644.  
  2645.  
  2646.       })();
  2647.  
  2648.       const setupEvents = () => {
  2649.  
  2650.  
  2651.         let scrollCount = 0;
  2652.  
  2653.         const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2654.  
  2655.  
  2656.         const delayFlushActiveItemsAfterUserActionK_ = () => {
  2657.  
  2658.           const lcRenderer = lcRendererElm();
  2659.           if (lcRenderer) {
  2660.             const cnt = (lcRenderer.inst || lcRenderer);
  2661.             if (!cnt.hasUserJustInteracted11_) return;
  2662.             if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2663.               cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2664.             }
  2665.           }
  2666.  
  2667.         }
  2668.  
  2669.         document.addEventListener('scroll', (evt) => {
  2670.           if (!evt || !evt.isTrusted) return;
  2671.           // lastScroll = dateNow();
  2672.           if (++scrollCount > 1e9) scrollCount = 9;
  2673.         }, passiveCapture); // support contain => support passive
  2674.  
  2675.         let lastScrollCount = -1;
  2676.         document.addEventListener('wheel', (evt) => {
  2677.           if (!evt || !evt.isTrusted) return;
  2678.           if (lastScrollCount === scrollCount) return;
  2679.           lastScrollCount = scrollCount;
  2680.           lastWheel = dateNow();
  2681.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2682.         }, passiveCapture); // support contain => support passive
  2683.  
  2684.         document.addEventListener('mousedown', (evt) => {
  2685.           if (!evt || !evt.isTrusted) return;
  2686.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2687.           lastMouseDown = dateNow();
  2688.           currentMouseDown = true;
  2689.           lastUserInteraction = lastMouseDown;
  2690.         }, passiveCapture);
  2691.  
  2692.         document.addEventListener('pointerdown', (evt) => {
  2693.           if (!evt || !evt.isTrusted) return;
  2694.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2695.           lastMouseDown = dateNow();
  2696.           currentMouseDown = true;
  2697.           lastUserInteraction = lastMouseDown;
  2698.         }, passiveCapture);
  2699.  
  2700.         document.addEventListener('click', (evt) => {
  2701.           if (!evt || !evt.isTrusted) return;
  2702.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2703.           lastMouseDown = lastMouseUp = dateNow();
  2704.           currentMouseDown = false;
  2705.           lastUserInteraction = lastMouseDown;
  2706.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2707.         }, passiveCapture);
  2708.  
  2709.         document.addEventListener('tap', (evt) => {
  2710.           if (!evt || !evt.isTrusted) return;
  2711.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2712.           lastMouseDown = lastMouseUp = dateNow();
  2713.           currentMouseDown = false;
  2714.           lastUserInteraction = lastMouseDown;
  2715.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2716.         }, passiveCapture);
  2717.  
  2718.  
  2719.         document.addEventListener('mouseup', (evt) => {
  2720.           if (!evt || !evt.isTrusted) return;
  2721.           if (currentMouseDown) {
  2722.             lastMouseUp = dateNow();
  2723.             currentMouseDown = false;
  2724.             lastUserInteraction = lastMouseUp;
  2725.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2726.           }
  2727.         }, passiveCapture);
  2728.  
  2729.  
  2730.         document.addEventListener('pointerup', (evt) => {
  2731.           if (!evt || !evt.isTrusted) return;
  2732.           if (currentMouseDown) {
  2733.             lastMouseUp = dateNow();
  2734.             currentMouseDown = false;
  2735.             lastUserInteraction = lastMouseUp;
  2736.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2737.           }
  2738.         }, passiveCapture);
  2739.  
  2740.         document.addEventListener('touchstart', (evt) => {
  2741.           if (!evt || !evt.isTrusted) return;
  2742.           lastTouchDown = dateNow();
  2743.           currentTouchDown = true;
  2744.           lastUserInteraction = lastTouchDown;
  2745.         }, passiveCapture);
  2746.  
  2747.         document.addEventListener('touchmove', (evt) => {
  2748.           if (!evt || !evt.isTrusted) return;
  2749.           lastTouchDown = dateNow();
  2750.           currentTouchDown = true;
  2751.           lastUserInteraction = lastTouchDown;
  2752.         }, passiveCapture);
  2753.  
  2754.         document.addEventListener('touchend', (evt) => {
  2755.           if (!evt || !evt.isTrusted) return;
  2756.           if (currentTouchDown) {
  2757.             lastTouchUp = dateNow();
  2758.             currentTouchDown = false;
  2759.             lastUserInteraction = lastTouchUp;
  2760.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2761.           }
  2762.         }, passiveCapture);
  2763.  
  2764.         document.addEventListener('touchcancel', (evt) => {
  2765.           if (!evt || !evt.isTrusted) return;
  2766.           if (currentTouchDown) {
  2767.             lastTouchUp = dateNow();
  2768.             currentTouchDown = false;
  2769.             lastUserInteraction = lastTouchUp;
  2770.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2771.           }
  2772.         }, passiveCapture);
  2773.  
  2774.  
  2775.       }
  2776.  
  2777.  
  2778.       const onRegistryReadyForDOMOperations = () => {
  2779.         let firstCheckedOnYtInit = false;
  2780.  
  2781.         const mightFirstCheckOnYtInit = () => {
  2782.           if (firstCheckedOnYtInit) return;
  2783.           firstCheckedOnYtInit = true;
  2784.  
  2785.           if (!document.body || !document.head) return;
  2786.  
  2787.           if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2788.  
  2789.           addCssManaged();
  2790.  
  2791.           let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2792.           if (efsContainer && efsContainer.parentNode !== document.body) {
  2793.             document.body.appendChild(efsContainer);
  2794.           }
  2795.  
  2796.  
  2797.         }
  2798.  
  2799.         if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2800.         // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2801.  
  2802.         if (document.documentElement && document.head) {
  2803.  
  2804.           addCssManaged();
  2805.  
  2806.         }
  2807.         // console.log(document.body===null)
  2808.  
  2809.         customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2810.  
  2811.  
  2812.           const tag = "yt-live-chat-item-list-renderer"
  2813.           const dummy = document.createElement(tag);
  2814.  
  2815.  
  2816.           const cProto = getProto(dummy);
  2817.           if (!cProto || !cProto.attached) {
  2818.             console.warn(`proto.attached for ${tag} is unavailable.`);
  2819.             return;
  2820.           }
  2821.  
  2822.  
  2823.           mightFirstCheckOnYtInit();
  2824.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2825.           console.log("[Begin]");
  2826.  
  2827.           const mclp = cProto;
  2828.           try {
  2829.             assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2830.             assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2831.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2832.             assertor(() => typeof mclp.setAtBottom === 'function');
  2833.             assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2834.             assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2835.           } catch (e) { }
  2836.  
  2837.  
  2838.           try {
  2839.             assertor(() => typeof mclp.attached === 'function');
  2840.             assertor(() => typeof mclp.detached === 'function');
  2841.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2842.             assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2843.             assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2844.             assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2845.             assertor(() => typeof mclp.smoothScroll_ === 'function');
  2846.             assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2847.           } catch (e) { }
  2848.  
  2849.           mclp.__intermediate_delay__ = null;
  2850.  
  2851.           let mzk = 0;
  2852.           let myk = 0;
  2853.           let mlf = 0;
  2854.           let myw = 0;
  2855.           let mzt = 0;
  2856.           let zarr = null;
  2857.           let mlg = 0;
  2858.  
  2859.           if ((mclp.clearList || 0).length === 0) {
  2860.             assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2861.             mclp.clearList66 = mclp.clearList;
  2862.             mclp.clearList = function () {
  2863.               mzk++;
  2864.               myk++;
  2865.               mlf++;
  2866.               myw++;
  2867.               mzt++;
  2868.               mlg++;
  2869.               zarr = null;
  2870.               this.__intermediate_delay__ = null;
  2871.               this.clearList66();
  2872.             };
  2873.             console.log("clearList", "OK");
  2874.           } else {
  2875.             console.log("clearList", "NG");
  2876.           }
  2877.  
  2878.  
  2879.           let onListRendererAttachedDone = false;
  2880.  
  2881.           function setList(itemOffset, items) {
  2882.  
  2883.             const isFirstTime = onListRendererAttachedDone === false;
  2884.  
  2885.             if (isFirstTime) {
  2886.               onListRendererAttachedDone = true;
  2887.               Promise.resolve().then(watchUserCSS);
  2888.               addCssManaged();
  2889.               setupEvents();
  2890.             }
  2891.  
  2892.             setupStyle(itemOffset, items);
  2893.  
  2894.             setupMutObserver(items);
  2895.           }
  2896.  
  2897.           mclp.attached419 = async function () {
  2898.  
  2899.             if (!this.isAttached) return;
  2900.  
  2901.             let maxTrial = 16;
  2902.             while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  2903.               if (--maxTrial < 0 || !this.isAttached) return;
  2904.               await new Promise(requestAnimationFrame);
  2905.             }
  2906.  
  2907.             if (this.isAttached !== true) return;
  2908.  
  2909.             if (!this.$) {
  2910.               console.warn("!this.$");
  2911.               return;
  2912.             }
  2913.             if (!this.$) return;
  2914.             /** @type {HTMLElement | null} */
  2915.             const itemScroller = this.$['item-scroller'];
  2916.             /** @type {HTMLElement | null} */
  2917.             const itemOffset = this.$['item-offset'];
  2918.             /** @type {HTMLElement | null} */
  2919.             const items = this.$['items'];
  2920.  
  2921.             if (!itemScroller || !itemOffset || !items) {
  2922.               console.warn("items.parentNode !== itemOffset");
  2923.               return;
  2924.             }
  2925.  
  2926.             if (nodeParent(items) !== itemOffset) {
  2927.  
  2928.               console.warn("items.parentNode !== itemOffset");
  2929.               return;
  2930.             }
  2931.  
  2932.  
  2933.             if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  2934.  
  2935.               console.warn("id incorrect");
  2936.               return;
  2937.             }
  2938.  
  2939.             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')
  2940.  
  2941.             if (!isTargetItems) {
  2942.               console.warn("!isTargetItems");
  2943.               return;
  2944.             }
  2945.  
  2946.             setList(itemOffset, items);
  2947.  
  2948.           }
  2949.  
  2950.           mclp.attached331 = mclp.attached;
  2951.           mclp.attached = function () {
  2952.             this.attached419 && this.attached419();
  2953.             return this.attached331();
  2954.           }
  2955.  
  2956.           mclp.detached331 = mclp.detached;
  2957.  
  2958.           mclp.detached = function () {
  2959.             setupMutObserver();
  2960.             return this.detached331();
  2961.           }
  2962.  
  2963.           const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  2964.           for (const t29 of t29s) {
  2965.             if ((t29.inst || t29).isAttached === true) {
  2966.               t29.attached419();
  2967.             }
  2968.           }
  2969.  
  2970.           if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  2971.  
  2972.             assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  2973.             assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  2974.  
  2975.             /** @type {Map<number, any>} */
  2976.             const aMap = new Map();
  2977.             let count = 6150;
  2978.             mclp.async66 = mclp.async;
  2979.             mclp.async = function (e, f) {
  2980.               // ensure the previous operation is done
  2981.               // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  2982.               const hasF = arguments.length === 2;
  2983.               const stack = new Error().stack;
  2984.               const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  2985.               if (count > 1e9) count = 6159;
  2986.               const resId = ++count;
  2987.               aMap.set(resId, e);
  2988.               (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  2989.                 const rp = aMap.get(resId);
  2990.                 if (typeof rp !== 'function') {
  2991.                   return;
  2992.                 }
  2993.                 let cancelCall = false;
  2994.                 if (isFlushAsync) {
  2995.                   if (rk < 0) {
  2996.                     cancelCall = true;
  2997.                   } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  2998.                     cancelCall = true;
  2999.                   }
  3000.                 }
  3001.                 if (cancelCall) {
  3002.                   aMap.delete(resId);
  3003.                 } else {
  3004.                   const asyncEn = function () {
  3005.                     aMap.delete(resId);
  3006.                     return rp.apply(this, arguments);
  3007.                   };
  3008.                   aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3009.                 }
  3010.               });
  3011.  
  3012.               return resId;
  3013.             }
  3014.  
  3015.             mclp.cancelAsync66 = mclp.cancelAsync;
  3016.             mclp.cancelAsync = function (resId) {
  3017.               if (resId <= 6150) {
  3018.                 this.cancelAsync66(resId);
  3019.               } else if (aMap.has(resId)) {
  3020.                 const rp = aMap.get(resId);
  3021.                 aMap.delete(resId);
  3022.                 if (typeof rp !== 'function') {
  3023.                   this.cancelAsync66(rp);
  3024.                 }
  3025.               }
  3026.             }
  3027.  
  3028.             console.log("async", "OK");
  3029.           } else {
  3030.             console.log("async", "NG");
  3031.           }
  3032.  
  3033.  
  3034.           if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3035.  
  3036.             assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3037.             mclp.showNewItems66_ = mclp.showNewItems_;
  3038.  
  3039.             mclp.showNewItems77_ = async function () {
  3040.               if (myk > 1e9) myk = 9;
  3041.               let tid = ++myk;
  3042.  
  3043.               await new Promise(requestAnimationFrame);
  3044.  
  3045.               if (tid !== myk) {
  3046.                 return;
  3047.               }
  3048.  
  3049.               const cnt = this;
  3050.  
  3051.               await Promise.resolve();
  3052.               cnt.showNewItems66_();
  3053.  
  3054.               await Promise.resolve();
  3055.  
  3056.             }
  3057.  
  3058.             mclp.showNewItems_ = function () {
  3059.  
  3060.               const cnt = this;
  3061.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3062.                 cnt.showNewItems77_().then(() => {
  3063.                   resolve();
  3064.                 });
  3065.               });
  3066.             }
  3067.  
  3068.             console.log("showNewItems_", "OK");
  3069.           } else {
  3070.             console.log("showNewItems_", "NG");
  3071.           }
  3072.  
  3073.  
  3074.           if ((mclp.flushActiveItems_ || 0).length === 0) {
  3075.  
  3076.             assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3077.  
  3078.             let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3079.  
  3080.             let contensWillChangeController = null;
  3081.  
  3082.             mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3083.  
  3084.             mclp.flushActiveItems78_ = async function (tid) {
  3085.               try {
  3086.                 if (tid !== mlf) return;
  3087.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3088.                 let logger = false;
  3089.                 const cnt = this;
  3090.                 let immd = cnt.__intermediate_delay__;
  3091.                 await new Promise(requestAnimationFrame);
  3092.  
  3093.                 if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3094.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3095.  
  3096.                 mlf++;
  3097.                 if (mlg > 1e9) mlg = 9;
  3098.                 ++mlg;
  3099.  
  3100.                 const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3101.                 const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3102.                 let changeMaxItemsToDisplay = false;
  3103.                 const activeItemsLen = this.activeItems_.length;
  3104.                 if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3105.                   logger = true;
  3106.  
  3107.                   groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3108.  
  3109.                   logger && console.log('[Begin]')
  3110.  
  3111.                   console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3112.                   if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3113.                     console.log('reduce maxitems');
  3114.                     if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3115.                       // as all the rendered chats are already "outdated"
  3116.                       // all old chats shall remove and reduced number of few chats will be rendered
  3117.                       // then restore to the original number
  3118.                       changeMaxItemsToDisplay = true;
  3119.                       this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3120.                       console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3121.                     }
  3122.                     this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3123.                     //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3124.  
  3125.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3126.                   } else {
  3127.                     this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3128.  
  3129.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3130.                   }
  3131.                 }
  3132.                 // it is found that it will render all stacked chats after switching back from background
  3133.                 // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3134.                 // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3135.  
  3136.  
  3137.                 const items = (cnt.$ || 0).items;
  3138.  
  3139.                 if (USE_WILL_CHANGE_CONTROLLER) {
  3140.                   if (contensWillChangeController && contensWillChangeController.element !== items) {
  3141.                     contensWillChangeController.release();
  3142.                     contensWillChangeController = null;
  3143.                   }
  3144.                   if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3145.                 }
  3146.                 const wcController = contensWillChangeController;
  3147.                 cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3148.                 wcController && wcController.beforeOper();
  3149.                 await Promise.resolve();
  3150.                 const acItems = cnt.activeItems_;
  3151.                 const len1 = acItems.length;
  3152.                 if(!len1) console.warn('cnt.activeItems_.length = 0');
  3153.                 let waitFor = [];
  3154.  
  3155.  
  3156.                 /** @type {Set<string>} */
  3157.                 const imageLinks = new Set();
  3158.  
  3159.                 if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3160.                   for (const item of acItems) {
  3161.                     fixLiveChatItem(item, imageLinks);
  3162.                   }
  3163.                 }
  3164.                 if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3165.                   if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3166.                   if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3167.  
  3168.                   // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3169.                   const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3170.                   // preload performs the high priority fetching.
  3171.                   // prefetch delays the chat display if the video resoruce is demanding.
  3172.  
  3173.                   if (rel) {
  3174.  
  3175.                     imageLinks.forEach(imageLink => {
  3176.                       let d = false;
  3177.                       const isEmoji = imageLink.includes('/emoji/');
  3178.                       const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3179.                       if (!pretechedSet.has(imageLink)) {
  3180.                         pretechedSet.add(imageLink);
  3181.                         d = true;
  3182.                       }
  3183.                       if (d) {
  3184.                         waitFor.push(linker(null, rel, imageLink, 'image'));
  3185.  
  3186.                       }
  3187.                     })
  3188.  
  3189.                   }
  3190.  
  3191.                 }
  3192.  
  3193.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3194.                 // console.log('ss1', Date.now())
  3195.                 if (waitFor.length > 0) {
  3196.                   await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3197.                 }
  3198.                 waitFor.length = 0;
  3199.                 waitFor = null;
  3200.                 // console.log('ss2', Date.now())
  3201.                 cnt.flushActiveItems66_();
  3202.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3203.                 const len2 = cnt.activeItems_.length;
  3204.                 const bAsync = len1 !== len2;
  3205.                 await Promise.resolve();
  3206.                 if (wcController) {
  3207.                   if (bAsync) {
  3208.                     cnt.async(() => {
  3209.                       wcController.afterOper();
  3210.                     });
  3211.                   } else {
  3212.                     wcController.afterOper();
  3213.                   }
  3214.                 }
  3215.                 if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3216.                   this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3217.  
  3218.                   logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3219.                   //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3220.                 } else if (changeMaxItemsToDisplay) {
  3221.  
  3222.                   logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3223.                     maxItemsToDisplay: this.data.maxItemsToDisplay,
  3224.                     reducedMaxItemsToDisplay,
  3225.                     originalMaxItemsToDisplay: tmpMaxItemsCount
  3226.                   });
  3227.                 }
  3228.                 logger && console.log('[End]')
  3229.  
  3230.                 logger && console.groupEnd();
  3231.  
  3232.                 if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3233.  
  3234.  
  3235.                   const ff = () => {
  3236.  
  3237.                     if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3238.                     //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3239.                     if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3240.                       cnt.scrollToBottom_();
  3241.  
  3242.                       Promise.resolve().then(() => {
  3243.  
  3244.                         if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3245.                         if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3246.                       });
  3247.  
  3248.  
  3249.                     }
  3250.                   }
  3251.  
  3252.                   ff();
  3253.  
  3254.  
  3255.                   Promise.resolve().then(ff);
  3256.  
  3257.                   // requestAnimationFrame(ff);
  3258.                 } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3259.  
  3260.                   const knt = cnt;
  3261.                   if (!scrollChatFn) {
  3262.                     const cnt = knt;
  3263.                     const f = () => {
  3264.                       const itemScroller = cnt.itemScroller;
  3265.                       if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3266.                       if (!cnt.atBottom) {
  3267.                         cnt.scrollToBottom_();
  3268.                       } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3269.                         itemScroller.scrollTop = itemScroller.scrollHeight;
  3270.                       }
  3271.                     };
  3272.                     scrollChatFn = () => Promise.resolve().then(f).then(f);
  3273.                   }
  3274.  
  3275.                   if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3276.                 }
  3277.  
  3278.                 return 1;
  3279.  
  3280.  
  3281.               } catch (e) {
  3282.                 console.warn(e);
  3283.               }
  3284.             }
  3285.  
  3286.             mclp.flushActiveItems77_ = function () {
  3287.  
  3288.               return new Promise(resResolve => {
  3289.                 try {
  3290.                   const cnt = this;
  3291.                   if (mlf > 1e9) mlf = 9;
  3292.                   let tid = ++mlf;
  3293.                   const hostElement = cnt.hostElement || cnt;
  3294.                   if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3295.                   if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3296.  
  3297.                   // 4 times to maxItems to avoid frequent trimming.
  3298.                   // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3299.  
  3300.                   const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3301.                   this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3302.                   if (cnt.canScrollToBottom_()) {
  3303.                     cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3304.                       .then(() => cnt.flushActiveItems78_(tid)) // async function
  3305.                       .then((asyncResult) => {
  3306.                         resResolve(asyncResult); // either undefined or 1
  3307.                         resResolve = null;
  3308.                       }).catch((e) => {
  3309.                         console.warn(e);
  3310.                         if (resResolve) resResolve();
  3311.                       });
  3312.                   } else {
  3313.                     resResolve(2);
  3314.                     resResolve = null;
  3315.                   }
  3316.                 } catch (e) {
  3317.                   console.warn(e);
  3318.                   if (resResolve) resResolve();
  3319.                 }
  3320.  
  3321.  
  3322.               });
  3323.  
  3324.             }
  3325.  
  3326.             mclp.flushActiveItems_ = function () {
  3327.               const cnt = this;
  3328.  
  3329.               if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3330.  
  3331.               if (cnt.activeItems_.length === 0) {
  3332.                 cnt.__intermediate_delay__ = null;
  3333.                 return;
  3334.               }
  3335.  
  3336.               const cntData = ((cnt || 0).data || 0);
  3337.               if (cntData.maxItemsToDisplay944 === undefined) {
  3338.                 cntData.maxItemsToDisplay944 = null;
  3339.                 if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3340.                 cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3341.               }
  3342.  
  3343.               // ignore previous __intermediate_delay__ and create a new one
  3344.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3345.                 cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3346.                   if (rt === 1) {
  3347.                     resolve(1); // success, scroll to bottom
  3348.                     if (hasMoreMessageState === 1) {
  3349.                       hasMoreMessageState = 0;
  3350.                       const showMore = (cnt.$ || 0)['show-more'];
  3351.                       if (showMore) {
  3352.                         showMore.classList.remove('has-new-messages-miuzp');
  3353.                       }
  3354.                     }
  3355.                   }
  3356.                   else if (rt === 2) {
  3357.                     resolve(2); // success, trim
  3358.                     if (hasMoreMessageState === 0) {
  3359.                       hasMoreMessageState = 1;
  3360.                       const showMore = cnt.$['show-more'];
  3361.                       if (showMore) {
  3362.                         showMore.classList.add('has-new-messages-miuzp');
  3363.                       }
  3364.                     }
  3365.                   }
  3366.                   else resolve(-1); // skip
  3367.                 }).catch(e => {
  3368.                   console.warn(e);
  3369.                 });
  3370.               });
  3371.  
  3372.             }
  3373.             console.log("flushActiveItems_", "OK");
  3374.           } else {
  3375.             console.log("flushActiveItems_", "NG");
  3376.           }
  3377.  
  3378.           mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3379.             try {
  3380.               if (mlg > 1e9) mlg = 9;
  3381.               const tid = ++mlg;
  3382.               const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3383.               const runCond = () => this.canScrollToBottom_();
  3384.               if (!keepTrialCond()) return;
  3385.               if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3386.               await new Promise(r => setTimeout(r, 80));
  3387.               if (!keepTrialCond()) return;
  3388.               if (runCond()) return this.flushActiveItems_() | 1;
  3389.               await new Promise(requestAnimationFrame);
  3390.               if (runCond()) return this.flushActiveItems_() | 1;
  3391.             } catch (e) {
  3392.               console.warn(e);
  3393.             }
  3394.           }
  3395.  
  3396.           if ((mclp.atBottomChanged_ || 0).length === 1) {
  3397.             // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3398.             assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3399.  
  3400.             const querySelector = HTMLElement.prototype.querySelector;
  3401.             const U = (element) => ({
  3402.               querySelector: (selector) => querySelector.call(element, selector)
  3403.             });
  3404.  
  3405.             let qid = 0;
  3406.             mclp.atBottomChanged_ = function (a) {
  3407.               let tid = ++qid;
  3408.               let b = this;
  3409.               a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3410.                 if (tid !== qid) return;
  3411.                 U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3412.               }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3413.                 this.hideShowMoreAsync_ = null,
  3414.                 U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3415.             }
  3416.  
  3417.             console.log("atBottomChanged_", "OK");
  3418.           } else {
  3419.             console.log("atBottomChanged_", "NG");
  3420.           }
  3421.  
  3422.           if ((mclp.onScrollItems_ || 0).length === 1) {
  3423.  
  3424.             assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3425.             mclp.onScrollItems66_ = mclp.onScrollItems_;
  3426.             mclp.onScrollItems77_ = async function (evt) {
  3427.               if (myw > 1e9) myw = 9;
  3428.               let tid = ++myw;
  3429.  
  3430.               await new Promise(requestAnimationFrame);
  3431.  
  3432.               if (tid !== myw) {
  3433.                 return;
  3434.               }
  3435.  
  3436.               const cnt = this;
  3437.  
  3438.               await Promise.resolve();
  3439.               if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3440.                 await Promise.resolve().then(() => {
  3441.                   this.ytRendererBehavior.onScroll(evt);
  3442.                 }).then(() => {
  3443.                   if (this.canScrollToBottom_()) {
  3444.                     const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3445.                     if (hasUserJustInteracted) {
  3446.                       // only when there is an user action
  3447.                       this.setAtBottom();
  3448.                       return 1;
  3449.                     }
  3450.                   } else {
  3451.                     // no message inserting
  3452.                     this.setAtBottom();
  3453.                     return 1;
  3454.                   }
  3455.                 }).then((r) => {
  3456.  
  3457.                   if (this.activeItems_.length) {
  3458.  
  3459.                     if (this.canScrollToBottom_()) {
  3460.                       this.flushActiveItems_();
  3461.                       return 1 && r;
  3462.                     } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3463.                       // delayed due to user action
  3464.                       this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3465.                       return 0;
  3466.                     }
  3467.                   }
  3468.                 }).then((r) => {
  3469.                   if (r) {
  3470.                     // ensure setAtBottom is correctly set
  3471.                     this.setAtBottom();
  3472.                   }
  3473.                 });
  3474.               } else {
  3475.                 cnt.onScrollItems66_(evt);
  3476.               }
  3477.  
  3478.               await Promise.resolve();
  3479.  
  3480.             }
  3481.  
  3482.             mclp.onScrollItems_ = function (evt) {
  3483.  
  3484.               const cnt = this;
  3485.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3486.                 cnt.onScrollItems77_(evt).then(() => {
  3487.                   resolve();
  3488.                 });
  3489.               });
  3490.             }
  3491.             console.log("onScrollItems_", "OK");
  3492.           } else {
  3493.             console.log("onScrollItems_", "NG");
  3494.           }
  3495.  
  3496.           if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3497.  
  3498.             assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3499.             mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3500.  
  3501.             mclp.handleLiveChatActions77_ = async function (arr) {
  3502.               if (typeof (arr || 0).length !== 'number') {
  3503.                 this.handleLiveChatActions66_(arr);
  3504.                 return;
  3505.               }
  3506.               if (mzt > 1e9) mzt = 9;
  3507.               let tid = ++mzt;
  3508.  
  3509.               if (zarr === null) zarr = arr;
  3510.               else Array.prototype.push.apply(zarr, arr);
  3511.               arr = null;
  3512.  
  3513.               await new Promise(requestAnimationFrame);
  3514.  
  3515.               if (tid !== mzt || zarr === null) {
  3516.                 return;
  3517.               }
  3518.  
  3519.               const carr = zarr;
  3520.               zarr = null;
  3521.  
  3522.               await Promise.resolve();
  3523.               this.handleLiveChatActions66_(carr);
  3524.               await Promise.resolve();
  3525.  
  3526.             }
  3527.  
  3528.             mclp.handleLiveChatActions_ = function (arr) {
  3529.  
  3530.               const cnt = this;
  3531.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3532.                 cnt.handleLiveChatActions77_(arr).then(() => {
  3533.                   resolve();
  3534.                 });
  3535.               });
  3536.             }
  3537.             console.log("handleLiveChatActions_", "OK");
  3538.           } else {
  3539.             console.log("handleLiveChatActions_", "NG");
  3540.           }
  3541.  
  3542.           mclp.hasUserJustInteracted11_ = () => {
  3543.             const t = dateNow();
  3544.             return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3545.           }
  3546.  
  3547.           if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3548.  
  3549.             assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3550.  
  3551.             mclp.canScrollToBottom_ = function () {
  3552.               return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3553.             }
  3554.  
  3555.             console.log("canScrollToBottom_", "OK");
  3556.           } else {
  3557.             console.log("canScrollToBottom_", "NG");
  3558.           }
  3559.  
  3560.           if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3561.  
  3562.             mclp.isSmoothScrollEnabled_ = function () {
  3563.               return false;
  3564.             }
  3565.  
  3566.             mclp.maybeResizeScrollContainer_ = function () {
  3567.               //
  3568.             }
  3569.  
  3570.             mclp.refreshOffsetContainerHeight_ = function () {
  3571.               //
  3572.             }
  3573.  
  3574.             mclp.smoothScroll_ = function () {
  3575.               //
  3576.             }
  3577.  
  3578.             mclp.resetSmoothScroll_ = function () {
  3579.               //
  3580.             }
  3581.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3582.           } else {
  3583.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3584.           }
  3585.  
  3586.           if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3587.  
  3588.             mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3589.             mclp.handleAddChatItemAction_ = function (a) {
  3590.               try {
  3591.                 if (a && typeof a === 'object' && !('length' in a)) {
  3592.                   fixLiveChatItem(a.item, null);
  3593.                   console.assert(arguments[0] === a);
  3594.                 }
  3595.               } catch (e) { console.warn(e) }
  3596.               return this.handleAddChatItemAction66_.apply(this, arguments);
  3597.             }
  3598.  
  3599.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3600.           } else {
  3601.  
  3602.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3603.           }
  3604.  
  3605.  
  3606.           if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3607.  
  3608.             mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3609.             mclp.handleReplaceChatItemAction_ = function (a) {
  3610.               try {
  3611.                 if (a && typeof a === 'object' && !('length' in a)) {
  3612.                   fixLiveChatItem(a.replacementItem, null);
  3613.                   console.assert(arguments[0] === a);
  3614.                 }
  3615.               } catch (e) { console.warn(e) }
  3616.               return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3617.             }
  3618.  
  3619.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3620.           } else {
  3621.  
  3622.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3623.           }
  3624.  
  3625.           console.log("[End]");
  3626.           console.groupEnd();
  3627.  
  3628.         });
  3629.  
  3630.  
  3631.         const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3632.  
  3633.           let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3634.  
  3635.           if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3636.  
  3637.             // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3638.             let v = `${attrValue}`;
  3639.             // conside a ticker is 101px width
  3640.             // 1% = 1.01px
  3641.             // 0.2% = 0.202px
  3642.  
  3643.  
  3644.             const ratio1 = (yd.ratio * 100);
  3645.             if (ratio1 > -1) { // avoid NaN
  3646.  
  3647.               // countdownDurationMs
  3648.               // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3649.               // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3650.               // 150000 - 1%    <1% = 1.5s>
  3651.               // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3652.               // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3653.  
  3654.               // 99px * 5% = 4.95px
  3655.  
  3656.               // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3657.  
  3658.  
  3659.               // 1% Duration
  3660.  
  3661.               let ratio2 = ratio1;
  3662.  
  3663.               const ydd = yd.data;
  3664.               if (ydd) {
  3665.  
  3666.                 const d1 = ydd.durationSec;
  3667.                 const d2 = ydd.fullDurationSec;
  3668.  
  3669.                 // @ step timing [min. 0.2%]
  3670.                 let numOfSteps = 500;
  3671.                 if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3672.                   if (d2 > 400) numOfSteps = 500; // 0.2%
  3673.                   else if (d2 > 200) numOfSteps = 200; // 0.5%
  3674.                   else if (d2 > 100) numOfSteps = 100; // 1%
  3675.                   else if (d2 > 50) numOfSteps = 50; // 2%
  3676.                   else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3677.                   else numOfSteps = 20;
  3678.                 }
  3679.                 if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3680.                 if (numOfSteps < 5) numOfSteps = 5;
  3681.  
  3682.                 const rd = numOfSteps / 100.0;
  3683.  
  3684.                 ratio2 = Math.round(ratio2 * rd) / rd;
  3685.  
  3686.                 // ratio2 = Math.round(ratio2 * 5) / 5;
  3687.                 ratio2 = ratio2.toFixed(1);
  3688.                 v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3689.  
  3690.                 if (yd.__style_last__ === v) return;
  3691.                 yd.__style_last__ = v;
  3692.                 // do not consider any delay here.
  3693.                 // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3694.  
  3695.               }
  3696.             }
  3697.  
  3698.             HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3699.  
  3700.  
  3701.           } else {
  3702.             HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3703.           }
  3704.  
  3705.         };
  3706.  
  3707.  
  3708.         const fpTicker = (renderer) => {
  3709.           const cnt = renderer.inst || renderer;
  3710.           assertor(() => typeof (cnt || 0).is === 'string');
  3711.           assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3712.           const container = (cnt.$ || 0).container;
  3713.           if (container) {
  3714.             assertor(() => (container || 0).nodeType === 1);
  3715.             assertor(() => typeof container.setAttribute === 'function');
  3716.             container.setAttribute = tickerContainerSetAttribute;
  3717.           } else {
  3718.             console.warn(`"container" does not exist in ${cnt.is}`);
  3719.           }
  3720.         };
  3721.  
  3722.  
  3723.         const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3724.           "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3725.  
  3726.  
  3727.         Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3728.  
  3729.           mightFirstCheckOnYtInit();
  3730.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3731.           console.log("[Begin]");
  3732.  
  3733.           // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3734.           let isMainVideoOngoing = null;
  3735.           let mainVideoLastProgress = null;
  3736.           // << end >>
  3737.  
  3738.           for (const tag of tags) {
  3739.             const dummy = document.createElement(tag);
  3740.  
  3741.             const cProto = getProto(dummy);
  3742.             if (!cProto || !cProto.attached) {
  3743.               console.warn(`proto.attached for ${tag} is unavailable.`);
  3744.               continue;
  3745.             }
  3746.  
  3747.             cProto.attached77 = cProto.attached;
  3748.  
  3749.             cProto.attached = function () {
  3750.               fpTicker(this.hostElement || this);
  3751.               return this.attached77();
  3752.             }
  3753.  
  3754.             for (const elm of document.getElementsByTagName(tag)) {
  3755.               if ((elm || elm.inst).isAttached === true) {
  3756.                 fpTicker(elm);
  3757.               }
  3758.             }
  3759.  
  3760.  
  3761.             let rafHackState = 0;
  3762.  
  3763.             let isTimingFunctionHackable = false;
  3764.  
  3765.             let urt = 0;
  3766.  
  3767.             if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3768.  
  3769.               // console.log('startCountdown', typeof cProto.startCountdown)
  3770.               // console.log('updateTimeout', typeof cProto.updateTimeout)
  3771.               // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3772.  
  3773.               isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3774.  
  3775.             } else {
  3776.               console.log(`Skip Timing Function Modification for ${tag}`);
  3777.               continue;
  3778.             }
  3779.  
  3780.  
  3781.             if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3782.  
  3783.               // cancelable - this.rafId < isAnimationPausedChanged >
  3784.               rafHackState = 1;
  3785.  
  3786.               if (isTimingFunctionHackable) {
  3787.                 rafHackState = 2;
  3788.  
  3789.               } else {
  3790.                 rafHackState = 4;
  3791.               }
  3792.  
  3793.             }
  3794.  
  3795.             const doAnimator = ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && typeof CSS === 'object' && typeof CSS.registerProperty === 'function';
  3796.  
  3797.             const doRAFHack = rafHackState === 2;
  3798.  
  3799.             cProto._throwOut = function () {
  3800.               this._r782 = 1;
  3801.               Promise.resolve().then(() => {
  3802.                 this.detached();
  3803.                 this.data = null;
  3804.                 if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  3805.                 if (this.__dataEnabled === true) this.__dataEnabled = false;
  3806.                 if (this.__dataReady === true) this.__dataReady = false;
  3807.                 const hm = this.hostElement || this;
  3808.                 if (hm.parentNode) hm.remove();
  3809.                 if (hm.firstChild) hm.textContent = '';
  3810.               }).catch(e => {
  3811.                 console.warn(e);
  3812.               });
  3813.             };
  3814.  
  3815.             // cProto._checkTickerBackgroundChanged = doAnimator ? function () {
  3816.             //   if (runTickerClassName === 'run-ticker') {
  3817.             //     const container = (this.$ || 0).container || 0;
  3818.             //     if (!container) return;
  3819.             //     container.classList.add('run-ticker-test');
  3820.             //     const evaluated = `${window.getComputedStyle(container).background}`;
  3821.             //     container.classList.remove('run-ticker-test');
  3822.             //     if (evaluated.indexOf('0.') < 4) {
  3823.             //       // not fulfilling
  3824.             //       // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box 
  3825.             //       runTickerClassName = 'run-ticker-forced';
  3826.             //       console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3827.             //         "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3828.             //         "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3829.             //       );
  3830.             //       console.warn(`%cWarning:\n\tYou might have added a userscript or extension that hacks ticker background too.\n\tYouTube Super Fast Chat will override it for you.`, 'color: #bada55');
  3831.             //       console.groupEnd();
  3832.             //     }
  3833.             //   }
  3834.             // } : null;
  3835.  
  3836.             cProto._makeAnimator = doAnimator ? function () {
  3837.               if (this._r782) return;
  3838.               // if (!this.isAttached) return;
  3839.               if (!this._runnerAE) {
  3840.                 const aElement = (this.$ || 0).container;
  3841.                 if (!aElement) return console.warn("this.$.container is undefined");
  3842.                 const da = this.data;
  3843.                 if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  3844.                 const c1 = this.colorFromDecimal(da.startBackgroundColor);
  3845.                 const c2 = this.colorFromDecimal(da.endBackgroundColor);
  3846.                 if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  3847.  
  3848.                 // if (!this.__tickerBackgroundInitialChecked__) {
  3849.                 //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  3850.                 //   console.log('__tickerBackgroundInitialChecked__')
  3851.                 //   this._checkTickerBackgroundChanged();
  3852.                 // }
  3853.  
  3854.                 aElement.style.setProperty('--ticker-c1', c1);
  3855.                 aElement.style.setProperty('--ticker-c2', c2);
  3856.                 aElement.classList.add(runTickerClassName);
  3857.                 const p = (this.countdownMs / this.countdownDurationMs) * 100;
  3858.                 // this._aeStartV = this.countdownMs;
  3859.                 // this._aeStartT = this.countdownDurationMs;
  3860.                 if (!(p >= 0 && p <= 100)) {
  3861.                   console.warn('incorrect time ratio', p);
  3862.                 } else {
  3863.                   /*
  3864.                   const u0 = p.toFixed(4) + '%';
  3865.                   this._runnerAE = animate.call(aElement,
  3866.                     [
  3867.                       { '--ticker-rtime': u0 },
  3868.                       { '--ticker-rtime': '0%' }
  3869.                     ]
  3870.                     ,
  3871.                     {
  3872.                       fill: "forwards",
  3873.                       duration: this.countdownMs,
  3874.                       easing: "linear"
  3875.                     }
  3876.                   );
  3877.                   */
  3878.  
  3879.                   let timingFn = 'linear';
  3880.  
  3881.                   const totalDuration = this.countdownDurationMs;
  3882.  
  3883.                   if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF === 'steps') {
  3884.  
  3885.                     // @ step timing [min. 0.2%]
  3886.                     let stepInterval = 0.2; // unit: %
  3887.                     if (totalDuration > 400000) stepInterval = 0.2;
  3888.                     else if (totalDuration > 200000) stepInterval = 0.5;
  3889.                     else if (totalDuration > 100000) stepInterval = 1;
  3890.                     else if (totalDuration > 50000) stepInterval = 2;
  3891.                     else if (totalDuration > 25000) stepInterval = 5;
  3892.                     else stepInterval = 5;
  3893.  
  3894.                     let numOfSteps = Math.round(100 / stepInterval);
  3895.  
  3896.                     if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3897.                     if (numOfSteps < 5) numOfSteps = 5;
  3898.  
  3899.                     timingFn = `steps(${numOfSteps}, end)`;
  3900.  
  3901.                   }
  3902.  
  3903.  
  3904.  
  3905.                   this._runnerAE = animate.call(aElement,
  3906.                     [
  3907.                       { '--ticker-rtime': '100%' },
  3908.                       { '--ticker-rtime': '0%' }
  3909.                     ]
  3910.                     ,
  3911.                     {
  3912.                       fill: "forwards",
  3913.                       duration: totalDuration,
  3914.                       easing: timingFn
  3915.                     }
  3916.                   );
  3917.  
  3918.                   this._runnerAE.onfinish = () => {
  3919.                     if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  3920.                       this._aeFinished();
  3921.                     }
  3922.                   }
  3923.  
  3924.                   let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  3925.                   if (bq >= 0 && bq <= totalDuration) {
  3926.  
  3927.                     this._runnerAE.currentTime = bq
  3928.                   } else {
  3929.                     console.warn('Error on setting _runnerAE.currentTime!');
  3930.                   }
  3931.  
  3932.  
  3933.                   aeConstructor = this._runnerAE.constructor; // constructor is from iframe
  3934.                   return this._runnerAE;
  3935.                 }
  3936.               } else {
  3937.                 if (!aeConstructor) return console.warn('aeConstructor is undefined');
  3938.                 // assume just time update
  3939.                 const ae = this._runnerAE;
  3940.                 if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  3941.                 if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  3942.                 let p = (this.countdownMs / this.countdownDurationMs) * 100;
  3943.                 if (!(p >= 0 && p <= 100)) {
  3944.                   console.warn('incorrect time ratio', p);
  3945.                 } else {
  3946.                   // let u0 = p.toFixed(4) + '%'
  3947.                   /*
  3948.                   ae.effect.setKeyframes([
  3949.                     { '--ticker-rtime': u0 },
  3950.                     { '--ticker-rtime': '0%' }
  3951.                   ]);
  3952.                   ae.effect.updateTiming({ duration: this.countdownMs });
  3953.                   */
  3954.                   // ae.currentTime = 0;
  3955.  
  3956.  
  3957.  
  3958.                   let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  3959.                   if (bq >= 0 && bq <= this.countdownDurationMs) {
  3960.  
  3961.                     this._runnerAE.currentTime = bq
  3962.                   } else {
  3963.                     console.warn('Error on setting _runnerAE.currentTime!');
  3964.                   }
  3965.  
  3966.  
  3967.                   ae.play();
  3968.                   return ae;
  3969.                 }
  3970.               }
  3971.             } : null;
  3972.  
  3973.             cProto._aeFinished = doAnimator ? function () {
  3974.  
  3975.               if (this._r782) return;
  3976.  
  3977.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  3978.                 this._throwOut();
  3979.                 return;
  3980.               }
  3981.  
  3982.               if (doAnimator) {
  3983.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  3984.  
  3985.                 let lc = window.performance.now();
  3986.                 this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  3987.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  3988.                 this.lastCountdownTimeMs = lc;
  3989.                 if (this.countdownMs > 10) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs); // just warning.
  3990.  
  3991.                 this.countdownMs = 0;
  3992.                 (this.lastCountdownTimeMs = null,
  3993.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  3994.                     this.slideDown()));
  3995.  
  3996.  
  3997.               } else {
  3998.                 console.warn('unexpected issue')
  3999.               }
  4000.             } : null;
  4001.  
  4002.  
  4003.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  4004.  
  4005.               if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  4006.                 urt++;
  4007.                 assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  4008.                 cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  4009.                 cProto.handlePauseReplay = function () {
  4010.                   if (this.isAttached) {
  4011.  
  4012.                     if (pairForPauseResumeM === 0) {
  4013.                       pairForPauseResume++;
  4014.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4015.                     }
  4016.                     // console.log('handlePauseReplay');
  4017.                     // console.log('handlePauseReplay', pairForPauseResume);
  4018.                     const r = this.handlePauseReplay66.apply(this, arguments);
  4019.                     isMainVideoOngoing = false;
  4020.                     return r;
  4021.                   }
  4022.                 };
  4023.               } else {
  4024.                 console.log('Error for setting cProto.handlePauseReplay', tag)
  4025.               }
  4026.  
  4027.               if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4028.                 urt++;
  4029.                 assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4030.                 cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4031.                 cProto.handleResumeReplay = function () {
  4032.                   if (this.isAttached) {
  4033.  
  4034.                     if (pairForPauseResumeM === 0) {
  4035.                       pairForPauseResume++;
  4036.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4037.                     }
  4038.                     // console.log('handleResumeReplay');
  4039.                     // console.log('handleResumeReplay', pairForPauseResume);
  4040.                     const r = this.handleResumeReplay66.apply(this, arguments);
  4041.                     isMainVideoOngoing = true;
  4042.                     return r;
  4043.  
  4044.                   }
  4045.                 };
  4046.               } else {
  4047.                 console.log('Error for setting cProto.handleResumeReplay', tag)
  4048.               }
  4049.  
  4050.               if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4051.                 urt++;
  4052.                 assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4053.                 cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4054.                 cProto.handleReplayProgress = function (a) {
  4055.                   if (this.isAttached) {
  4056.                     const p = mainVideoLastProgress;
  4057.                     mainVideoLastProgress = a;
  4058.                     if (isMainVideoOngoing === false) { // ignore isMainVideoOngoing === null ?
  4059.                       const d = a - p;
  4060.                       if (d > 0 && d < 0.28) isMainVideoOngoing = true; // timeupdate
  4061.                       // 0.28 is due to
  4062.                       //    - most browsers will fire the timeupdate event between 4 to 60 times per second
  4063.                       //    - i.e. timeupdate roughly every 15-250 milliseconds
  4064.                     }
  4065.                     let promiseResult = null;
  4066.                     if (this.isAnimationPaused) {
  4067.                       // unstable state for isMainVideoOngoing; delay required
  4068.                       // all the tickers' handleReplayProgress are executed in the same microtask
  4069.                       // execute after result returned
  4070.                       const lz1 = pairForPauseResume;
  4071.                       Promise.resolve().then(() => {
  4072.                         return promiseResult
  4073.                       }).then(() => {
  4074.  
  4075.  
  4076.                         if (isMainVideoOngoing === true && this.isAnimationPaused) {
  4077.                           const lz2 = pairForPauseResume;
  4078.                           // console.log( 10044000, lz1, lz2 , mainVideoLastProgress - a, isMainVideoOngoing  )
  4079.                           if (lz1 === lz2 && mainVideoLastProgress !== null && mainVideoLastProgress - a >= -1e-5) this.isAnimationPaused = false; // trigger isAnimationPausedChanged
  4080.                         }
  4081.  
  4082.                       });
  4083.                     }
  4084.  
  4085.                     const lq1 = pairForPauseResume;
  4086.                     promiseResult = Promise.resolve().then(() => {
  4087.                       const lq2 = pairForPauseResume;
  4088.  
  4089.                       if (lq1 === lq2) {
  4090.                         this.handleReplayProgress66(a);
  4091.                       }
  4092.  
  4093.  
  4094.                     })
  4095.  
  4096.                   }
  4097.                 };
  4098.               } else {
  4099.                 console.log('Error for setting cProto.handleReplayProgress', tag)
  4100.               }
  4101.  
  4102.             }
  4103.  
  4104.             const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4105.  
  4106.             cProto.startCountdown = (doRAFHack || doAnimator) ? function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4107.  
  4108.               // a.durationSec [s] => countdownMs [ms]
  4109.               // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4110.               // lastCountdownTimeMs => raf ongoing
  4111.               // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4112.  
  4113.               if (this._r782) return;
  4114.  
  4115.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4116.                 this._throwOut();
  4117.                 return;
  4118.               }
  4119.  
  4120.               if (doAnimator) {
  4121.                 b = void 0 === b ? 0 : b;
  4122.                 if (void 0 !== a) {
  4123.                   this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4124.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4125.                   if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4126.                     this.lastCountdownTimeMs = performance.now()
  4127.                     this.rafId = 1
  4128.                     if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4129.                     this.detlaSincePausedSecs = 0;
  4130.                     const ae = this._makeAnimator();
  4131.                     if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4132.  
  4133.                     // console.log(539, isMainVideoOngoing)
  4134.                     if (this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4135.                       // << This is mainly for [PlayBack Replay] backwards >>
  4136.                       // fix the case when the main video is paused but due to seeking the tickers are added
  4137.                       // play first then pause immediately to allow the visual effect of initial state
  4138.                       // don't forget to set the "playerProgressSec"
  4139.                       // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4140.                       this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4141.                       this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4142.                       this.detlaSincePausedSecs = 0;
  4143.                       this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4144.                     }
  4145.                   }
  4146.                 }
  4147.               } else {
  4148.                 // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4149.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4150.                 b = void 0 === b ? 0 : b;
  4151.                 void 0 !== a && (this.countdownMs = 1E3 * a,
  4152.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4153.                   this.ratio = 1,
  4154.                   this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  4155.                     this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4156.               }
  4157.  
  4158.             } : cProto.startCountdown;
  4159.  
  4160.             cProto.updateTimeout = (doRAFHack || doAnimator) ? function (a) {
  4161.  
  4162.               if (this._r782) return;
  4163.  
  4164.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4165.                 this._throwOut();
  4166.                 return;
  4167.               }
  4168.  
  4169.               if (doAnimator) {
  4170.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4171.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4172.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4173.                 if (this.isAttached && this.countdownMs) {
  4174.                   this.lastCountdownTimeMs = a
  4175.                   const ae = this._makeAnimator(); // request raf
  4176.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4177.                 } else {
  4178.                   (this.lastCountdownTimeMs = null,
  4179.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4180.                       this.slideDown()));
  4181.                 }
  4182.               } else {
  4183.                 // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4184.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4185.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4186.                 this.ratio = this.countdownMs / this.countdownDurationMs;
  4187.                 this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4188.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  4189.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4190.                       this.slideDown()))
  4191.               }
  4192.  
  4193.             } : cProto.updateTimeout;
  4194.  
  4195.             // let ez = 0;
  4196.             cProto.isAnimationPausedChanged = (doRAFHack || doAnimator) ? function (a, b) {
  4197.  
  4198.               if (this._r782) return;
  4199.  
  4200.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4201.                 this._throwOut();
  4202.                 return;
  4203.               }
  4204.               let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4205.               this._forceNoDetlaSincePausedSecs783 = 0;
  4206.  
  4207.               Promise.resolve().then(() => {
  4208.  
  4209.                 if (doAnimator) {
  4210.  
  4211.                   const playState = (this._runnerAE || 0).playState;
  4212.                   if (a && playState === 'running') {
  4213.  
  4214.                   } else if (!a && playState !== 'running' && b) {
  4215.  
  4216.                   } else {
  4217.                     return;
  4218.                   }
  4219.                 }
  4220.  
  4221.                 // if (Math.abs(this.detlaSincePausedSecs) < 0.01) this.detlaSincePausedSecs = 0;
  4222.                 if (doAnimator) {
  4223.                   const pu = () => { // running -> pause
  4224.                     this._runnerAE.pause()
  4225.                     let lc = window.performance.now();
  4226.                     this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4227.                     if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4228.                     this.lastCountdownTimeMs = lc;
  4229.                   };
  4230.                   const wa = () => { // pause -> running
  4231.                     if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4232.                     a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4233.                     this.detlaSincePausedSecs = 0;
  4234.                     this.updateTimeout(a);
  4235.                     this.lastCountdownTimeMs = window.performance.now();
  4236.                   };
  4237.                   a ? (this._runnerAE && pu()) : (!a && b && wa());
  4238.                 } else {
  4239.                   // ez++;
  4240.                   // if(ez> 1e9) ez=9;
  4241.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4242.                   a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4243.                     this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4244.                       this.detlaSincePausedSecs = 0),
  4245.                     this.boundUpdateTimeout37_(a),
  4246.                     this.lastCountdownTimeMs = window.performance.now())
  4247.                 }
  4248.  
  4249.               }).catch(e => {
  4250.                 console.log(e);
  4251.               });
  4252.  
  4253.  
  4254.  
  4255.             } : cProto.isAnimationPausedChanged;
  4256.  
  4257.  
  4258.             if (doAnimator) {
  4259.  
  4260.               assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4261.  
  4262.               let dummyValueForStyleReturn = null;
  4263.  
  4264.               cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4265.               cProto.computeContainerStyle = function (a, b) {
  4266.  
  4267.                 if (this._r782) return;
  4268.  
  4269.                 if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4270.                   this._throwOut();
  4271.                   return;
  4272.                 }
  4273.  
  4274.                 const fullDurationSec = a ? a.fullDurationSec : 0;
  4275.                 if (fullDurationSec > 0 && typeof b === 'number') {
  4276.  
  4277.                   // usually zero
  4278.  
  4279.                   // let currentDuationSrc = b * fullDurationSec; // a.durationSec
  4280.  
  4281.                   // console.log(231, fullDurationSec, b, currentDuationSrc, a.durationSec);
  4282.  
  4283.                   /*
  4284.                   if (a.mdsz && typeof a.mdst) return a.mdst;
  4285.                   a.mdsz = 1;
  4286.  
  4287.  
  4288.  
  4289.                   let c1 = this.colorFromDecimal(a.startBackgroundColor);
  4290.                   let c2 = this.colorFromDecimal(a.endBackgroundColor);
  4291.  
  4292.                   let ratio = currentDuationSrc / fullDurationSec;
  4293.  
  4294.                   let m = (ratio * 100).toFixed(1);
  4295.  
  4296.  
  4297.                   let s = `--background:linear-gradient(90deg, ${c1},${c1} ${m}%,${c2} ${m}%,${c2});`
  4298.                   let ro = {
  4299.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4300.                     "implementsGoogStringTypedString": true
  4301.                   };
  4302.  
  4303.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4304.  
  4305.                   a.mdst = s;
  4306.  
  4307.                   return ro;
  4308.                   */
  4309.                 }
  4310.  
  4311.  
  4312.  
  4313.                 // return this.computeContainerStyle66.apply(this, arguments);
  4314.  
  4315.                 if (dummyValueForStyleReturn === null) {
  4316.  
  4317.                   let s = `--nx:82;`
  4318.                   let ro = {
  4319.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4320.                     "implementsGoogStringTypedString": true
  4321.                   };
  4322.  
  4323.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4324.  
  4325.  
  4326.                   dummyValueForStyleReturn = ro;
  4327.  
  4328.  
  4329.                 }
  4330.  
  4331.  
  4332.                 return dummyValueForStyleReturn;
  4333.  
  4334.  
  4335.               }
  4336.  
  4337.             }
  4338.  
  4339.             if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  4340.               console.log('ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF', tag, doAnimator ? 'OK' : 'NG');
  4341.             }
  4342.  
  4343.             if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4344.               console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4345.             }
  4346.  
  4347.           }
  4348.           console.log("[End]");
  4349.           console.groupEnd();
  4350.  
  4351.  
  4352.         });
  4353.  
  4354.  
  4355.         if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4356.  
  4357.  
  4358.           customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4359.  
  4360.             mightFirstCheckOnYtInit();
  4361.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4362.             console.log("[Begin]");
  4363.             (() => {
  4364.  
  4365.               const tag = "yt-live-chat-message-input-renderer"
  4366.               const dummy = document.createElement(tag);
  4367.  
  4368.               const cProto = getProto(dummy);
  4369.               if (!cProto || !cProto.attached) {
  4370.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4371.                 return;
  4372.               }
  4373.  
  4374.               let doHack = false;
  4375.               if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4376.  
  4377.                 // not cancellable
  4378.                 console.log('handleTimeout', typeof cProto.handleTimeout)
  4379.                 console.log('updateTimeout', typeof cProto.updateTimeout)
  4380.  
  4381.                 doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4382.  
  4383.               }
  4384.  
  4385.               if (doHack) {
  4386.  
  4387.                 cProto.handleTimeout = function (a) {
  4388.                   console.log('cProto.handleTimeout', tag)
  4389.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4390.                   this.timeoutDurationMs = this.timeoutMs = a;
  4391.                   this.countdownRatio = 1;
  4392.                   0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4393.                 };
  4394.                 cProto.updateTimeout = function (a) {
  4395.                   console.log('cProto.updateTimeout', tag)
  4396.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4397.                   this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4398.                     this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4399.                   this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4400.                     rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4401.                 };
  4402.  
  4403.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4404.               } else {
  4405.  
  4406.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4407.               }
  4408.  
  4409.             })();
  4410.  
  4411.             console.log("[End]");
  4412.  
  4413.             console.groupEnd();
  4414.  
  4415.  
  4416.           })
  4417.  
  4418.  
  4419.         }
  4420.  
  4421.         if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4422.  
  4423.  
  4424.           customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4425.  
  4426.             mightFirstCheckOnYtInit();
  4427.             groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4428.             console.log("[Begin]");
  4429.             (() => {
  4430.  
  4431.               const tag = "yt-emoji-picker-renderer"
  4432.               const dummy = document.createElement(tag);
  4433.  
  4434.               const cProto = getProto(dummy);
  4435.               if (!cProto || !cProto.attached) {
  4436.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4437.                 return;
  4438.               }
  4439.  
  4440.               let doHack = false;
  4441.               if (typeof cProto.animateScroll_ === 'function') {
  4442.  
  4443.                 // not cancellable
  4444.                 console.log('animateScroll_', typeof cProto.animateScroll_)
  4445.  
  4446.                 doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4447.  
  4448.               }
  4449.  
  4450.               if (doHack) {
  4451.  
  4452.                 const querySelector = HTMLElement.prototype.querySelector;
  4453.                 const U = (element) => ({
  4454.                   querySelector: (selector) => querySelector.call(element, selector)
  4455.                 });
  4456.  
  4457.                 cProto.animateScroll_ = function (a) {
  4458.                   // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4459.                   if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4460.                   this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4461.                   a -= this.lastAnimationTime_;
  4462.                   200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4463.                     rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4464.                       this.animationEnd_ = this.animationStart_ = null,
  4465.                       this.lastAnimationTime_ = 0);
  4466.                   this.updateButtons_()
  4467.                 }
  4468.  
  4469.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  4470.               } else {
  4471.  
  4472.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  4473.               }
  4474.  
  4475.             })();
  4476.  
  4477.             console.log("[End]");
  4478.  
  4479.             console.groupEnd();
  4480.           });
  4481.         }
  4482.  
  4483.         if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  4484.  
  4485.  
  4486.           customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  4487.  
  4488.             mightFirstCheckOnYtInit();
  4489.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  4490.             console.log("[Begin]");
  4491.             (() => {
  4492.  
  4493.               const tag = "yt-live-chat-docked-message"
  4494.               const dummy = document.createElement(tag);
  4495.  
  4496.               const cProto = getProto(dummy);
  4497.               if (!cProto || !cProto.attached) {
  4498.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4499.                 return;
  4500.               }
  4501.  
  4502.               let doHack = false;
  4503.               if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  4504.  
  4505.                 // cancelable - this.intersectRAF <detached>
  4506.                 // yt-live-chat-docked-message
  4507.                 // boundCheckIntersections <-> checkIntersections
  4508.                 // onDockableMessagesChanged
  4509.                 //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  4510.  
  4511.                 console.log('detached', typeof cProto.detached)
  4512.                 console.log('checkIntersections', typeof cProto.checkIntersections)
  4513.                 console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  4514.  
  4515.                 doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  4516.  
  4517.               }
  4518.  
  4519.               if (doHack) {
  4520.  
  4521.                 cProto.checkIntersections = function () {
  4522.                   // console.log('cProto.checkIntersections', tag)
  4523.                   if (this.dockableMessages.length) {
  4524.                     this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  4525.                     let a = this.dockableMessages[0]
  4526.                       , b = this.hostElement.getBoundingClientRect();
  4527.                     a = a.getBoundingClientRect();
  4528.                     let c = a.top - b.top
  4529.                       , d = 8 >= c;
  4530.                     c = 8 >= c - this.hostElement.clientHeight;
  4531.                     if (d) {
  4532.                       let e;
  4533.                       for (; d;) {
  4534.                         e = this.dockableMessages.shift();
  4535.                         d = this.dockableMessages[0];
  4536.                         if (!d)
  4537.                           break;
  4538.                         d = d.getBoundingClientRect();
  4539.                         c = d.top - b.top;
  4540.                         let f = 8 >= c;
  4541.                         if (8 >= c - a.height)
  4542.                           if (f)
  4543.                             a = d;
  4544.                           else
  4545.                             return;
  4546.                         d = f
  4547.                       }
  4548.                       this.dock(e)
  4549.                     } else
  4550.                       c && this.dockedItem && this.clear()
  4551.                   } else
  4552.                     this.intersectRAF = 0
  4553.                 }
  4554.  
  4555.                 cProto.onDockableMessagesChanged = function () {
  4556.                   // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  4557.                   this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  4558.                 }
  4559.  
  4560.                 cProto.detached = function () {
  4561.                   this.intersectRAF && rafHub.cancel(this.intersectRAF)
  4562.                 }
  4563.  
  4564.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  4565.               } else {
  4566.  
  4567.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  4568.               }
  4569.  
  4570.             })();
  4571.  
  4572.             console.log("[End]");
  4573.  
  4574.             console.groupEnd();
  4575.  
  4576.           });
  4577.  
  4578.         }
  4579.  
  4580.         if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  4581.  
  4582.  
  4583.           customElements.whenDefined("yt-img-shadow").then(() => {
  4584.  
  4585.             mightFirstCheckOnYtInit();
  4586.             groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  4587.             console.log("[Begin]");
  4588.             (() => {
  4589.  
  4590.               const tag = "yt-img-shadow"
  4591.               const dummy = document.createElement(tag);
  4592.  
  4593.               const cProto = getProto(dummy);
  4594.               if (!cProto || !cProto.attached) {
  4595.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4596.                 return;
  4597.               }
  4598.  
  4599.               if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  4600.  
  4601.                 cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  4602.                 cProto.thumbnailChanged_ = function (a) {
  4603.  
  4604.                   if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  4605.                   if (!this.oldThumbnail_ && !this.thumbnail) return;
  4606.  
  4607.                   return this.thumbnailChanged66_.apply(this, arguments)
  4608.  
  4609.                 }
  4610.                 console.log("cProto.thumbnailChanged_ - OK");
  4611.  
  4612.               } else {
  4613.                 console.log("cProto.thumbnailChanged_ - NG");
  4614.  
  4615.               }
  4616.               if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  4617.  
  4618.                 cProto.setSrc66_ = cProto.setSrc_;
  4619.                 cProto.setSrc_ = function (a) {
  4620.                   if ((((this || 0).$ || 0).img || 0).src === a) return;
  4621.                   return this.setSrc66_.apply(this, arguments)
  4622.                 }
  4623.  
  4624.                 console.log("cProto.setSrc_ - OK");
  4625.               } else {
  4626.  
  4627.                 console.log("cProto.setSrc_ - NG");
  4628.               }
  4629.  
  4630.             })();
  4631.  
  4632.             console.log("[End]");
  4633.  
  4634.             console.groupEnd();
  4635.  
  4636.           });
  4637.  
  4638.         }
  4639.  
  4640.         if(FIX_THUMBNAIL_DATACHANGED){
  4641.  
  4642.  
  4643.  
  4644.           customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  4645.  
  4646.             mightFirstCheckOnYtInit();
  4647.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  4648.             console.log("[Begin]");
  4649.             (() => {
  4650.  
  4651.               const tag = "yt-live-chat-author-badge-renderer"
  4652.               const dummy = document.createElement(tag);
  4653.  
  4654.               const cProto = getProto(dummy);
  4655.               if (!cProto || !cProto.attached) {
  4656.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4657.                 return;
  4658.               }
  4659.  
  4660.  
  4661.               if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  4662.  
  4663.  
  4664.  
  4665.                 cProto.dataChanged86 = cProto.dataChanged;
  4666.                 cProto.dataChanged = function(a){
  4667.  
  4668. /*
  4669.  
  4670.         for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  4671.             b.removeChild(b.firstChild);
  4672.         if (a)
  4673.             if (a.icon) {
  4674.                 var c = document.createElement("yt-icon");
  4675.                 "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  4676.                 c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  4677.                 b.appendChild(c)
  4678.             } else if (a.customThumbnail) {
  4679.                 c = document.createElement("img");
  4680.                 var d;
  4681.                 (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4682.                 b.appendChild(c),
  4683.                 c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  4684.             }
  4685.  
  4686.             */
  4687.  
  4688.                   const image = ((this||0).$||0).image
  4689.                   if (image && a && image.firstElementChild) {
  4690.                     let exisiting = image.firstElementChild;
  4691.                     if (exisiting === image.lastElementChild) {
  4692.  
  4693.  
  4694.                       if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  4695.  
  4696.                         let c = exisiting;
  4697.                         if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  4698.                           if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  4699.                           if (c.defaultToFilled !== true) c.defaultToFilled = true;
  4700.                         } else {
  4701.                           let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  4702.                           if (c.icon !== p) c.icon = p;
  4703.                           if (c.defaultToFilled !== false) c.defaultToFilled = false;
  4704.                         }
  4705.                         return;
  4706.  
  4707.  
  4708.                       } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  4709.  
  4710.                         let c = exisiting;
  4711.                         if(a.customThumbnail.thumbnails.map(e=>e.url).includes(c.src)){
  4712.  
  4713.                           c.setAttribute("alt", this.hostElement.ariaLabel || "");
  4714.                           return;
  4715.                         }
  4716.                         /*
  4717.  
  4718.                         var d;
  4719.                         (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4720.  
  4721.  
  4722.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  4723.                           */
  4724.                       }
  4725.  
  4726.  
  4727.                     }
  4728.                   }
  4729.                   return this.dataChanged86.apply(this,arguments)
  4730.  
  4731.                 }
  4732.                 console.log("cProto.dataChanged - OK");
  4733.  
  4734.               }else{
  4735.                 assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  4736.                 console.log("cProto.dataChanged - NG");
  4737.  
  4738.               }
  4739.  
  4740.             })();
  4741.  
  4742.             console.log("[End]");
  4743.  
  4744.             console.groupEnd();
  4745.  
  4746.           });
  4747.  
  4748.  
  4749.         }
  4750.  
  4751.  
  4752.       }
  4753.  
  4754.       promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  4755.  
  4756.  
  4757.     })();
  4758.  
  4759.  
  4760.   });
  4761.  
  4762. })({ IntersectionObserver });