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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             0.23.1
  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.   .run-ticker {
  492.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  493.   }
  494.  
  495.   .run-ticker-test {
  496.     background: #00000001;
  497.   }
  498.  
  499.   .run-ticker-forced,
  500.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  501.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  502.   {
  503.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  504.   }
  505.  
  506.  
  507.   ${cssText8_fonts_pre_render}
  508.  
  509.   ${cssText9_no_backdrop_filter_when_menu_shown}
  510.  
  511.   @supports (contain: layout paint style) {
  512.  
  513.     ${cssText5}
  514.  
  515.   }
  516.  
  517.   @supports (color: var(--general)) {
  518.  
  519.     html {
  520.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  521.     }
  522.  
  523.     ${cssText3_smooth_transform_position}
  524.  
  525.     ${cssText7c_will_change_unset}
  526.  
  527.     ${cssText7b_content_visibility_unset}
  528.  
  529.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  530.         overflow-y: scroll;
  531.         padding-right: 0;
  532.     }
  533.  
  534.     ${cssText4_smooth_transform_forced_props}
  535.  
  536.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  537.         pointer-events: none !important;
  538.     }
  539.  
  540.     #continuations, #continuations * {
  541.         contain: strict;
  542.         position: fixed;
  543.         top: 2px;
  544.         height: 1px;
  545.         width: 2px;
  546.         height: 1px;
  547.         visibility: collapse;
  548.     }
  549.  
  550.     ${cssText6b_show_more_button}
  551.  
  552.     ${cssText6d_input_panel_border}
  553.  
  554.     ${cssText6c_input_panel_overflow}
  555.  
  556.   }
  557.  
  558.  
  559.   @supports (overflow-anchor: auto) {
  560.  
  561.     .no-anchor * {
  562.         overflow-anchor: none;
  563.     }
  564.     .no-anchor > item-anchor {
  565.         overflow-anchor: auto;
  566.     }
  567.  
  568.     item-anchor {
  569.  
  570.         height:1px;
  571.         width: 100%;
  572.         transform: scaleY(0.00001);
  573.         transform-origin:0 0;
  574.         contain: strict;
  575.         opacity:0;
  576.         display:flex;
  577.         position:relative;
  578.         flex-shrink:0;
  579.         flex-grow:0;
  580.         margin-bottom:0;
  581.         overflow:hidden;
  582.         box-sizing:border-box;
  583.         visibility: visible;
  584.         content-visibility: visible;
  585.         contain-intrinsic-size: auto 1px;
  586.         pointer-events:none !important;
  587.  
  588.     }
  589.  
  590.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  591.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  592.     }
  593.  
  594.     html item-anchor {
  595.  
  596.         height: 1px;
  597.         width: 1px;
  598.         top: auto;
  599.         left: auto;
  600.         right: auto;
  601.         bottom: auto;
  602.         transform: translateY(-1px);
  603.         position: absolute;
  604.         z-index: -1;
  605.  
  606.     }
  607.  
  608.   }
  609.  
  610.   @supports (color: var(--pre-rendering)) {
  611.  
  612.     @keyframes dontRenderAnimation {
  613.         0% {
  614.             background-position-x: 3px;
  615.         }
  616.         100% {
  617.             background-position-x: 4px;
  618.         }
  619.     }
  620.  
  621.     .dont-render {
  622.         /* visibility: collapse !important; */
  623.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  624.  
  625.         transform: scale(0.01) !important;
  626.         transform: scale(0.00001) !important;
  627.         transform: scale(0.0000001) !important;
  628.         transform-origin: 0 0 !important;
  629.         z-index: -1 !important;
  630.         contain: strict !important;
  631.         box-sizing: border-box !important;
  632.  
  633.         height: 1px !important;
  634.         height: 0.1px !important;
  635.         height: 0.01px !important;
  636.         height: 0.0001px !important;
  637.         height: 0.000001px !important;
  638.  
  639.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  640.  
  641.     }
  642.  
  643.     #sk35z {
  644.       display: block !important;
  645.  
  646.       visibility: collapse !important;
  647.  
  648.       transform: scale(0.01) !important;
  649.       transform: scale(0.00001) !important;
  650.       transform: scale(0.0000001) !important;
  651.       transform-origin: 0 0 !important;
  652.       z-index: -1 !important;
  653.       contain: strict !important;
  654.       box-sizing: border-box !important;
  655.  
  656.       height: 1px !important;
  657.       height: 0.1px !important;
  658.       height: 0.01px !important;
  659.       height: 0.0001px !important;
  660.       height: 0.000001px !important;
  661.  
  662.       position: absolute !important;
  663.       top: -1000px !important;
  664.       left: -1000px !important;
  665.  
  666.     }
  667.  
  668.   }
  669.  
  670.   ${cssText10_show_more_blinker}
  671.  
  672.   `;
  673.  
  674.  
  675.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  676.  
  677.   // Create a unique key for the script and check if it is already running
  678.   const hkey_script = 'mchbwnoasqph';
  679.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  680.   win[hkey_script] = true;
  681.  
  682.   if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  683.  
  684.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  685.     if (te4 < 3) {
  686.       setTimeout(() => { });
  687.       setTimeout(() => { });
  688.     }
  689.  
  690.   }
  691.  
  692.  
  693.   function dr(s) {
  694.     // reserved for future use
  695.     return s;
  696.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  697.   }
  698.  
  699.   const getProto = (element) => {
  700.     if (element) {
  701.       const cnt = element.inst || element;
  702.       return cnt.constructor.prototype || null;
  703.     }
  704.     return null;
  705.   }
  706.  
  707.   const assertor = (f) => f() || console.assert(false, f + "");
  708.  
  709.   const fnIntegrity = (f, d) => {
  710.     if (!f || typeof f !== 'function') {
  711.       console.warn('f is not a function', f);
  712.       return;
  713.     }
  714.     let p = f + "", s = 0, j = -1, w = 0;
  715.     for (let i = 0, l = p.length; i < l; i++) {
  716.       const t = p[i];
  717.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  718.         if (j < i - 1) w++;
  719.         j = i;
  720.       } else {
  721.         s++;
  722.       }
  723.     }
  724.     let itz = `${f.length}.${s}.${w}`;
  725.     if (!d) {
  726.       return itz;
  727.     } else {
  728.       return itz === d;
  729.     }
  730.   }
  731.  
  732.  
  733.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  734.  
  735.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  736.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  737.   if (!isContainSupport) {
  738.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  739.   } else {
  740.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  741.   }
  742.  
  743.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  744.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  745.   if (!isOverflowAnchorSupport) {
  746.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  747.   } else {
  748.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  749.   }
  750.  
  751.   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.
  752.  
  753.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  754.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  755.  
  756.  
  757.   const fxOperator = (proto, propertyName) => {
  758.     let propertyDescriptorGetter = null;
  759.     try {
  760.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  761.     } catch (e) { }
  762.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  763.       try {
  764.  
  765.         return propertyDescriptorGetter.call(dr(e));
  766.       } catch (e) { }
  767.       return e[propertyName];
  768.     } : (e) => e[propertyName];
  769.   };
  770.  
  771.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  772.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  773.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  774.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  775.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  776.  
  777.   const groupCollapsed = (text1, text2) => {
  778.  
  779.     console.groupCollapsed(`%c${text1}%c${text2}`,
  780.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  781.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  782.     );
  783.   }
  784.  
  785.  
  786.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  787.   const onRegistryReady = (callback) => {
  788.     if (typeof customElements === 'undefined') {
  789.       if (!('__CE_registry' in document)) {
  790.         // https://github.com/webcomponents/polyfills/
  791.         Object.defineProperty(document, '__CE_registry', {
  792.           get() {
  793.             // return undefined
  794.           },
  795.           set(nv) {
  796.             if (typeof nv == 'object') {
  797.               delete this.__CE_registry;
  798.               this.__CE_registry = nv;
  799.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  800.             }
  801.             return true;
  802.           },
  803.           enumerable: false,
  804.           configurable: true
  805.         })
  806.       }
  807.       let eventHandler = (evt) => {
  808.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  809.         const f = callback;
  810.         callback = null;
  811.         eventHandler = null;
  812.         f();
  813.       };
  814.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  815.     } else {
  816.       callback();
  817.     }
  818.   };
  819.  
  820.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  821.  
  822.   /* globals WeakRef:false */
  823.  
  824.   /** @type {(o: Object | null) => WeakRef | null} */
  825.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  826.  
  827.   /** @type {(wr: Object | null) => Object | null} */
  828.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  829.  
  830.   const { addCssManaged } = (() => {
  831.  
  832.     const addFontPreRendering = () => {
  833.  
  834.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  835.  
  836.       let efsContainer = document.createElement('elzm-fonts');
  837.       efsContainer.id = 'elzm-fonts-yk75g'
  838.  
  839.       const arr = [];
  840.       let p = document.createElement('elzm-font');
  841.       arr.push(p);
  842.  
  843.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  844.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  845.  
  846.           p = document.createElement('elzm-font');
  847.           p.style.fontWeight = size;
  848.           arr.push(p);
  849.         }
  850.       }
  851.  
  852.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  853.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  854.  
  855.           p = document.createElement('elzm-font');
  856.           p.style.fontFamily = 'Roboto';
  857.           p.style.fontWeight = size;
  858.           arr.push(p);
  859.         }
  860.       }
  861.  
  862.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  863.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  864.  
  865.           p = document.createElement('elzm-font');
  866.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  867.           p.style.fontWeight = size;
  868.           arr.push(p);
  869.         }
  870.       }
  871.  
  872.  
  873.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  874.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  875.  
  876.           p = document.createElement('elzm-font');
  877.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  878.           p.style.fontWeight = size;
  879.           arr.push(p);
  880.         }
  881.       }
  882.  
  883.  
  884.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  885.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  886.  
  887.           p = document.createElement('elzm-font');
  888.           p.style.fontFamily = 'sans-serif';
  889.           p.style.fontWeight = size;
  890.           arr.push(p);
  891.         }
  892.       }
  893.  
  894.       console.log('number of elzm-font elements', arr.length);
  895.  
  896.       HTMLElement.prototype.append.apply(efsContainer, arr);
  897.  
  898.       (document.body || document.documentElement).appendChild(efsContainer);
  899.  
  900.  
  901.       console.log('elzm-font elements have been added to the page for rendering.');
  902.  
  903.       console.groupEnd();
  904.  
  905.     }
  906.  
  907.     let isCssAdded = false;
  908.  
  909.     function addCssElement() {
  910.       let s = document.createElement('style');
  911.       s.id = 'ewRvC';
  912.       return s;
  913.     }
  914.  
  915.     const addCssManaged = () => {
  916.       if (!isCssAdded && document.documentElement && document.head) {
  917.         isCssAdded = true;
  918.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  919.         if (ENABLE_FONT_PRE_RENDERING) {
  920.           Promise.resolve().then(addFontPreRendering)
  921.         }
  922.       }
  923.     }
  924.  
  925.     return { addCssManaged };
  926.   })();
  927.  
  928.  
  929.   const { setupStyle } = (() => {
  930.  
  931.     const sp7 = Symbol();
  932.  
  933.     const proxyHelperFn = (dummy) => ({
  934.  
  935.       get(target, prop) {
  936.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  937.       },
  938.       set(target, prop, value) {
  939.         if (!(prop in dummy)) {
  940.           target[prop] = value;
  941.         }
  942.         return true;
  943.       },
  944.       has(target, prop) {
  945.         return (prop in target);
  946.       },
  947.       deleteProperty(target, prop) {
  948.         return true;
  949.       },
  950.       ownKeys(target) {
  951.         return Object.keys(target);
  952.       },
  953.       defineProperty(target, key, descriptor) {
  954.         return Object.defineProperty(target, key, descriptor);
  955.       },
  956.       getOwnPropertyDescriptor(target, key) {
  957.         return Object.getOwnPropertyDescriptor(target, key);
  958.       },
  959.  
  960.     });
  961.  
  962.     const setupStyle = (m1, m2) => {
  963.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  964.  
  965.       const dummy1v = {
  966.         transform: '',
  967.         height: '',
  968.         minHeight: '',
  969.         paddingBottom: '',
  970.         paddingTop: ''
  971.       };
  972.  
  973.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  974.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  975.         dummy1v[k] = dummyStyleFn(k);
  976.       }
  977.  
  978.       const dummy1p = proxyHelperFn(dummy1v);
  979.       const sp1v = new Proxy(m1.style, dummy1p);
  980.       const sp2v = new Proxy(m2.style, dummy1p);
  981.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  982.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  983.       m1.removeAttribute("style");
  984.       m2.removeAttribute("style");
  985.  
  986.     }
  987.  
  988.     return { setupStyle };
  989.  
  990.   })();
  991.  
  992.  
  993.  
  994.     /*
  995.   function innerTextFixFn() {
  996.  
  997.     if (elemInnerText.status) return;
  998.     elemInnerText.status = 1;
  999.  
  1000.  
  1001.     const pd = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText');
  1002.     if (!pd) return;
  1003.     if (pd.configurable !== true) return;
  1004.     const getterFn = pd.get;
  1005.     if (typeof getterFn !== 'function') return;
  1006.     const getterGn = function () {
  1007.       const resultText = getterFn.apply(this, arguments);
  1008.       if (!resultText&& elemInnerText.status === 1) {
  1009.         const html = this.innerHTML;
  1010.         console.log(1234, html)
  1011.         if (html) {
  1012.           elemInnerText.status = 2;
  1013.           console.log(new Error().stack)
  1014.  
  1015.         }
  1016.       }
  1017.       return resultText;
  1018.     }
  1019.     let np = Object.assign({}, pd, { get: getterGn });
  1020.     console.log(124, np)
  1021.     Object.defineProperty(HTMLElement.prototype, 'innerText', np);
  1022.     console.log(125, Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText').get)
  1023.  
  1024.   }    */
  1025.  
  1026.  
  1027.   function setThumbnails(config) {
  1028.  
  1029.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1030.  
  1031.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1032.  
  1033.  
  1034.       if (thumbnails && thumbnails.length > 0) {
  1035.         if (flag0 > 0 && thumbnails.length > 1) {
  1036.           let pSize = 0;
  1037.           let newThumbnails = [];
  1038.           for (const thumbnail of thumbnails) {
  1039.             if (!thumbnail || !thumbnail.url) continue;
  1040.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1041.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1042.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1043.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1044.               newThumbnails.push(thumbnail);
  1045.               if (imageLinks) imageLinks.add(thumbnail.url);
  1046.             }
  1047.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1048.               pSize = thumbnail.width;
  1049.             }
  1050.           }
  1051.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1052.             baseObject.thumbnails = newThumbnails;
  1053.           } else {
  1054.             newThumbnails.length = 0;
  1055.           }
  1056.           newThumbnails = null;
  1057.         } else {
  1058.           for (const thumbnail of thumbnails) {
  1059.             if (thumbnail && thumbnail.url) {
  1060.               if (imageLinks) imageLinks.add(thumbnail.url);
  1061.             }
  1062.           }
  1063.         }
  1064.       }
  1065.  
  1066.     }
  1067.   }
  1068.  
  1069.   function fixLiveChatItem(item, imageLinks) {
  1070.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1071.     if (liveChatTextMessageRenderer) {
  1072.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1073.       if (messageRuns && messageRuns.length > 0) {
  1074.         for (const run of messageRuns) {
  1075.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1076.           setThumbnails({
  1077.             baseObject: emojiImage,
  1078.             thumbnails: emojiImage.thumbnails,
  1079.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1080.             imageLinks
  1081.           });
  1082.         }
  1083.       }
  1084.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1085.       setThumbnails({
  1086.         baseObject: authorPhoto,
  1087.         thumbnails: authorPhoto.thumbnails,
  1088.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1089.         imageLinks
  1090.       });
  1091.     }
  1092.   }
  1093.  
  1094.  
  1095.   const cleanContext = async (win) => {
  1096.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1097.     try {
  1098.       let mx = 16; // MAX TRIAL
  1099.       const frameId = 'vanillajs-iframe-v1';
  1100.       /** @type {HTMLIFrameElement | null} */
  1101.       let frame = document.getElementById(frameId);
  1102.       let removeIframeFn = null;
  1103.       if (!frame) {
  1104.         frame = document.createElement('iframe');
  1105.         frame.id = 'vanillajs-iframe-v1';
  1106.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1107.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1108.         n.appendChild(frame);
  1109.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1110.         const root = document.documentElement;
  1111.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1112.         removeIframeFn = (setTimeout) => {
  1113.           const removeIframeOnDocumentReady = (e) => {
  1114.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1115.             win = null;
  1116.             setTimeout(() => {
  1117.               n.remove();
  1118.               n = null;
  1119.             }, 200);
  1120.           }
  1121.           if (document.readyState !== 'loading') {
  1122.             removeIframeOnDocumentReady();
  1123.           } else {
  1124.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1125.           }
  1126.         }
  1127.       }
  1128.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1129.       const fc = frame.contentWindow;
  1130.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1131.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  1132.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  1133.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1134.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1135.       res.animate = HTMLElement.prototype.animate;
  1136.       return res;
  1137.     } catch (e) {
  1138.       console.warn(e);
  1139.       return null;
  1140.     }
  1141.   };
  1142.  
  1143.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1144.  
  1145.     const flags = () => {
  1146.       try {
  1147.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1148.       } catch (e) { }
  1149.       return null;
  1150.     };
  1151.  
  1152.     const flagsForced = () => {
  1153.       try {
  1154.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1155.       } catch (e) { }
  1156.       return null;
  1157.     };
  1158.  
  1159.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1160.  
  1161.       if (!EXPERIMENT_FLAGS) return;
  1162.  
  1163.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1164.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1165.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1166.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1167.         }
  1168.       }
  1169.  
  1170.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1171.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1172.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1173.       }
  1174.  
  1175.     };
  1176.  
  1177.     const uf = (EXPERIMENT_FLAGS) => {
  1178.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1179.       if (EXPERIMENT_FLAGS) {
  1180.         flagsFn(EXPERIMENT_FLAGS);
  1181.         flagsFn(flagsForced());
  1182.       }
  1183.     }
  1184.  
  1185.     uf();
  1186.  
  1187.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1188.  
  1189.       uf();
  1190.       let cidFlags = 0;
  1191.       let kd = 0;
  1192.       new Promise(flagResolve => {
  1193.  
  1194.         const flagTimer = () => {
  1195.           const EXPERIMENT_FLAGS = flags();
  1196.           if (!EXPERIMENT_FLAGS) return;
  1197.           uf(EXPERIMENT_FLAGS);
  1198.           if (kd > 0) return;
  1199.           kd = 1;
  1200.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1201.           const moDeferred = new Promise(resolve => {
  1202.             let mo = new MutationObserver(() => {
  1203.               if (mo) {
  1204.                 mo.disconnect();
  1205.                 mo.takeRecords();
  1206.                 mo = null;
  1207.                 resolve();
  1208.               }
  1209.             });
  1210.             mo.observe(document, { subtree: true, childList: true });
  1211.           });
  1212.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1213.         };
  1214.  
  1215.         uf();
  1216.         cidFlags = setInterval(flagTimer, 1);
  1217.       }).then(() => {
  1218.         if (cidFlags > 0) clearInterval(cidFlags);
  1219.         cidFlags = 0;
  1220.         uf();
  1221.       });
  1222.  
  1223.     }
  1224.  
  1225.     return flagsFnOnInterval;
  1226.  
  1227.   })() : null;
  1228.  
  1229.   let kptPF = null;
  1230.   const emojiPrefetched = new Set();
  1231.   const authorPhotoPrefetched = new Set();
  1232.  
  1233.   function linker(link, rel, href, _as){
  1234.     return new Promise(resolve=>{
  1235.       if (!link) link = document.createElement('link');
  1236.       link.rel = rel;
  1237.       if (_as) link.setAttribute('as', _as);
  1238.       link.onload = function () {
  1239.         resolve({
  1240.           link: this,
  1241.           success: true
  1242.         })
  1243.         this.remove();
  1244.       };
  1245.       link.onerror = function () {
  1246.         resolve({
  1247.           link: this,
  1248.           success: false
  1249.         });
  1250.         this.remove();
  1251.       };
  1252.       link.href = href;
  1253.       document.head.appendChild(link);
  1254.       link= null;
  1255.     });
  1256.   }
  1257.  
  1258.   cleanContext(win).then(__CONTEXT__ => {
  1259.     if (!__CONTEXT__) return null;
  1260.  
  1261.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate } = __CONTEXT__;
  1262.  
  1263.     let aeConstructor = null;
  1264.  
  1265.     // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  1266.     let pairForPauseResume = 0; // each increasion = number of ticker
  1267.     let pairForPauseResumeM = 0;
  1268.     // << end >>
  1269.  
  1270.     if(flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1271.  
  1272.     function basePrefetching() {
  1273.  
  1274.       new Promise(resolve => {
  1275.  
  1276.         if (document.readyState !== 'loading') {
  1277.           resolve();
  1278.         } else {
  1279.           win.addEventListener("DOMContentLoaded", resolve, false);
  1280.         }
  1281.  
  1282.       }).then(() => {
  1283.         const hostL1 = [
  1284.           'https://www.youtube.com', 'https://googlevideo.com',
  1285.           'https://googleapis.com', 'https://accounts.youtube.com',
  1286.           'https://www.gstatic.com', 'https://ggpht.com',
  1287.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1288.         ];
  1289.  
  1290.         const hostL2 = [
  1291.           'https://youtube.com',
  1292.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1293.         ];
  1294.  
  1295.         let link = null;
  1296.  
  1297.         function kn() {
  1298.  
  1299.           link = document.createElement('link');
  1300.           if (link.relList && link.relList.supports) {
  1301.             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)
  1302.           } else {
  1303.             kptPF = 0;
  1304.           }
  1305.  
  1306.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1307.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1308.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1309.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1310.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1311.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1312.           console.groupEnd();
  1313.  
  1314.         }
  1315.  
  1316.         for (const h of hostL1) {
  1317.  
  1318.           if (kptPF === null) kn();
  1319.           if (ENABLE_BASE_PREFETCHING) {
  1320.             // if (kptPF & 1) {
  1321.             //   linker(link, 'dns-prefetch', h);
  1322.             //   link = null;
  1323.             // }
  1324.             if (kptPF & 2) {
  1325.               linker(link, 'preconnect', h);
  1326.               link = null;
  1327.             }
  1328.           }
  1329.         }
  1330.  
  1331.         for (const h of hostL2) {
  1332.           if (kptPF === null) kn();
  1333.           if (ENABLE_BASE_PREFETCHING) {
  1334.             if (kptPF & 1) {
  1335.               linker(link, 'dns-prefetch', h);
  1336.               link = null;
  1337.             }
  1338.           }
  1339.         }
  1340.  
  1341.       })
  1342.  
  1343.  
  1344.     }
  1345.  
  1346.     basePrefetching();
  1347.  
  1348.     (() => {
  1349.       // data manipulation
  1350.  
  1351.       if (!DO_PARTICIPANT_LIST_HACKS) return;
  1352.  
  1353.       class Mutex {
  1354.  
  1355.         constructor() {
  1356.           this.p = Promise.resolve()
  1357.         }
  1358.  
  1359.         /**
  1360.          *  @param {(lockResolve: () => void)} f
  1361.          */
  1362.         lockWith(f) {
  1363.           this.p = this.p.then(() => new Promise(f).catch(console.warn))
  1364.         }
  1365.  
  1366.       }
  1367.  
  1368.  
  1369.       /**
  1370.  
  1371.        h.onParticipantsChanged = function() {
  1372.           this.notifyPath("participantsManager.participants")
  1373.       }
  1374.  
  1375.  
  1376.       at h.onParticipantsChanged (live_chat_polymer.js:8334:41)
  1377.       at e.<anonymous> (live_chat_polymer.js:1637:69)
  1378.       at e.Bb [as __shady_dispatchEvent] (webcomponents-sd.js:46:110)
  1379.       at k.dispatchEvent (webcomponents-sd.js:122:237)
  1380.       at mu (live_chat_polymer.js:1677:71)
  1381.       at Object.wga [as fn] (live_chat_polymer.js:1678:99)
  1382.       at a._propertiesChanged (live_chat_polymer.js:1726:426)
  1383.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1384.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1385.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1386.  
  1387.       */
  1388.  
  1389.  
  1390.       const beforeParticipantsMap = new WeakMap();
  1391.  
  1392.       const { notifyPath7081 } = (() => {
  1393.  
  1394.         const mutexParticipants = new Mutex();
  1395.  
  1396.         let uvid = 0;
  1397.         let r95dm = 0;
  1398.         let c95dm = -1;
  1399.  
  1400.         const foundMap = (base, content) => {
  1401.           /*
  1402.             let lastSearch = 0;
  1403.             let founds = base.map(baseEntry => {
  1404.               let search = content.indexOf(baseEntry, lastSearch);
  1405.               if (search < 0) return false;
  1406.               lastSearch = search + 1;
  1407.               return true;
  1408.             });
  1409.             return founds;
  1410.           */
  1411.           const contentSet = new Set(content);
  1412.           return base.map(baseEntry => contentSet.has(baseEntry));
  1413.  
  1414.         }
  1415.  
  1416.  
  1417.  
  1418.         const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1419.  
  1420.           const handler1 = {
  1421.             get(target, prop, receiver) {
  1422.               if (prop === 'object') {
  1423.                 return participants; // avoid memory leakage
  1424.               }
  1425.               if (prop === 'type') {
  1426.                 return 'splice';
  1427.               }
  1428.               return target[prop];
  1429.             }
  1430.           };
  1431.           const releaser = () => {
  1432.             participants = null;
  1433.           }
  1434.  
  1435.           let foundsForAfter = foundMap(idsAfter, idsBefore);
  1436.           let foundsForBefore = foundMap(idsBefore, idsAfter);
  1437.  
  1438.           let indexSplices = [];
  1439.           let contentUpdates = [];
  1440.           for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1441.             if (beforeParticipants[i] === participants[j]) {
  1442.               i++; j++;
  1443.             } else if (idsBefore[i] === idsAfter[j]) {
  1444.               // content changed
  1445.               contentUpdates.push({ indexI: i, indexJ: j })
  1446.               i++; j++;
  1447.             } else {
  1448.               let addedCount = 0;
  1449.               for (let q = j; q < foundsForAfter.length; q++) {
  1450.                 if (foundsForAfter[q] === false) addedCount++;
  1451.                 else break;
  1452.               }
  1453.               let removedCount = 0;
  1454.               for (let q = i; q < foundsForBefore.length; q++) {
  1455.                 if (foundsForBefore[q] === false) removedCount++;
  1456.                 else break;
  1457.               }
  1458.               if (!addedCount && !removedCount) {
  1459.                 throw 'ERROR(0xFF32): spliceIndicesFunc';
  1460.               }
  1461.               indexSplices.push(new Proxy({
  1462.                 index: j,
  1463.                 addedCount: addedCount,
  1464.                 removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1465.               }, handler1));
  1466.               i += removedCount;
  1467.               j += addedCount;
  1468.             }
  1469.           }
  1470.           foundsForBefore = null;
  1471.           foundsForAfter = null;
  1472.           idsBefore = null;
  1473.           idsAfter = null;
  1474.           beforeParticipants = null;
  1475.           return { indexSplices, contentUpdates, releaser };
  1476.  
  1477.         }
  1478.  
  1479.         /*
  1480.  
  1481.         customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1482.  
  1483.         VM63631:1 Error
  1484.         at customElements.get.notifyPath (<anonymous>:1:122)
  1485.         at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1486.         at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1487.         at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1488.         at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1489.         at ju (live_chat_polymer.js:1674:217)
  1490.         at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1491.         at b._flushProperties (live_chat_polymer.js:1597:200)
  1492.         at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1493.         at a.notifyPath (live_chat_polymer.js:1741:182)
  1494.  
  1495.         */
  1496.  
  1497.         function convertToIds(participants) {
  1498.           return participants.map(participant => {
  1499.             if (!participant || typeof participant !== 'object') {
  1500.               console.warn('Error(0xFA41): convertToIds', participant);
  1501.               return participant; // just in case
  1502.             }
  1503.             let keys = Object.keys(participant);
  1504.             // liveChatTextMessageRenderer
  1505.             // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1506.             // liveChatPaidMessageRenderer
  1507.             /*
  1508.  
  1509.               'yt-live-chat-participant-renderer' utilizes the following:
  1510.               authorName.simpleText: string
  1511.               authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1512.               authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1513.               authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1514.               authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1515.  
  1516.             */
  1517.             if (keys.length !== 1) {
  1518.               console.warn('Error(0xFA42): convertToIds', participant);
  1519.               return participant; // just in case
  1520.             }
  1521.             let key = keys[0];
  1522.             let renderer = (participant[key] || 0);
  1523.             let authorName = (renderer.authorName || 0);
  1524.             let text = `${authorName.simpleText || authorName.text}`
  1525.             let res = participant; // fallback if it is not a vaild entry
  1526.             if (typeof text !== 'string') {
  1527.               console.warn('Error(0xFA53): convertToIds', participant);
  1528.             } else {
  1529.               text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1530.               if (text.length > 1) res = text;
  1531.             }
  1532.             return res;
  1533.             // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1534.             // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1535.           });
  1536.         }
  1537.  
  1538.         const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1539.           // just update when content is changed.
  1540.           if (p1.authorName !== p2.authorName) return true;
  1541.           if (p1.authorPhoto !== p2.authorPhoto) return true;
  1542.           if (p1.authorBadges !== p2.authorBadges) return true;
  1543.           return false;
  1544.         } : (p1, p2) => {
  1545.           // keep integrity all the time.
  1546.           return p1 !== p2; // always true
  1547.         }
  1548.  
  1549.         function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1550.  
  1551.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1552.             if (path !== "participantsManager.participants") {
  1553.               return this.__notifyPath5036__.apply(this, arguments);
  1554.             }
  1555.             if (c95dm === r95dm) return;
  1556.           } else {
  1557.             const stack = new Error().stack;
  1558.             if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1559.               return this.__notifyPath5036__.apply(this, arguments);
  1560.             }
  1561.           }
  1562.  
  1563.           if (uvid > 1e8) uvid = uvid % 100;
  1564.           let tid = ++uvid;
  1565.  
  1566.           const cnt = this; // "yt-live-chat-participant-list-renderer"
  1567.           mutexParticipants.lockWith(lockResolve => {
  1568.  
  1569.             const participants00 = cnt.participantsManager.participants;
  1570.  
  1571.             if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1572.               lockResolve();
  1573.               return;
  1574.             }
  1575.  
  1576.             let doUpdate = false;
  1577.  
  1578.             if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1579.  
  1580.               if (!participants00.r94dm) {
  1581.                 participants00.r94dm = 1;
  1582.                 if (++r95dm > 1e9) r95dm = 9;
  1583.                 participants00.push = function () {
  1584.                   if (++r95dm > 1e9) r95dm = 9;
  1585.                   return Array.prototype.push.apply(this, arguments);
  1586.                 }
  1587.                 participants00.pop = function () {
  1588.                   if (++r95dm > 1e9) r95dm = 9;
  1589.                   return Array.prototype.pop.apply(this, arguments);
  1590.                 }
  1591.                 participants00.shift = function () {
  1592.                   if (++r95dm > 1e9) r95dm = 9;
  1593.                   return Array.prototype.shift.apply(this, arguments);
  1594.                 }
  1595.                 participants00.unshift = function () {
  1596.                   if (++r95dm > 1e9) r95dm = 9;
  1597.                   return Array.prototype.unshift.apply(this, arguments);
  1598.                 }
  1599.                 participants00.splice = function () {
  1600.                   if (++r95dm > 1e9) r95dm = 9;
  1601.                   return Array.prototype.splice.apply(this, arguments);
  1602.                 }
  1603.                 participants00.sort = function () {
  1604.                   if (++r95dm > 1e9) r95dm = 9;
  1605.                   return Array.prototype.sort.apply(this, arguments);
  1606.                 }
  1607.                 participants00.reverse = function () {
  1608.                   if (++r95dm > 1e9) r95dm = 9;
  1609.                   return Array.prototype.reverse.apply(this, arguments);
  1610.                 }
  1611.               }
  1612.  
  1613.               if (c95dm !== r95dm) {
  1614.                 c95dm = r95dm;
  1615.                 doUpdate = true;
  1616.               }
  1617.  
  1618.             } else {
  1619.               doUpdate = true;
  1620.             }
  1621.  
  1622.             if (!doUpdate) {
  1623.               lockResolve();
  1624.               return;
  1625.             }
  1626.  
  1627.             const participants = participants00.slice(0);
  1628.             const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1629.             beforeParticipantsMap.set(cnt, participants);
  1630.  
  1631.             const resPromise = (async () => {
  1632.  
  1633.               if (beforeParticipants.length === 0) {
  1634.                 // not error
  1635.                 return 0;
  1636.               }
  1637.  
  1638.               let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1639.  
  1640.               // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1641.               if (beforeParticipants.length !== countOfElements) {
  1642.                 // there is somewrong for the cache. - sometimes happen
  1643.                 return 0;
  1644.               }
  1645.  
  1646.               const idsBefore = convertToIds(beforeParticipants);
  1647.               const idsAfter = convertToIds(participants);
  1648.  
  1649.               let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1650.  
  1651.               let res = 1; // default 1 for no update
  1652.  
  1653.               if (indexSplices.length >= 1) {
  1654.  
  1655.  
  1656.                 // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1657.                 // let p1 = indexSplices[0].removed;
  1658.                 // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1659.  
  1660.                 /* folllow
  1661.                     a.notifyPath(c + ".splices", d);
  1662.                     a.notifyPath(c + ".length", b.length);
  1663.                 */
  1664.                 // stampDomArraySplices_
  1665.  
  1666.  
  1667.                 await new Promise(resolve => {
  1668.                   cnt.resolveForDOMRendering781 = resolve;
  1669.  
  1670.                   cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1671.                     indexSplices
  1672.                   });
  1673.                   indexSplices = null;
  1674.                   releaser();
  1675.                   releaser = null;
  1676.                   cnt.__notifyPath5036__("participantsManager.participants.length",
  1677.                     participants.length
  1678.                   );
  1679.  
  1680.                 });
  1681.  
  1682.                 await Promise.resolve(0); // play safe for the change of 'length'
  1683.                 countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1684.  
  1685.                 let wrongSize = participants.length !== countOfElements
  1686.                 if (wrongSize) {
  1687.                   console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1688.                   return 0;
  1689.                 }
  1690.  
  1691.                 res = 2 | 4;
  1692.  
  1693.               } else {
  1694.  
  1695.                 indexSplices = null;
  1696.                 releaser();
  1697.                 releaser = null;
  1698.  
  1699.                 if (participants.length !== countOfElements) {
  1700.                   // other unhandled cases
  1701.                   return 0;
  1702.                 }
  1703.  
  1704.               }
  1705.  
  1706.               // participants.length === countOfElements before contentUpdates
  1707.               if (contentUpdates.length >= 1) {
  1708.                 for (const contentUpdate of contentUpdates) {
  1709.                   let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1710.                   if (isChanged) {
  1711.                     cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1712.                     res |= 4 | 8;
  1713.                   }
  1714.                 }
  1715.               }
  1716.               contentUpdates = null;
  1717.  
  1718.               return res;
  1719.  
  1720.  
  1721.             })();
  1722.  
  1723.  
  1724.             resPromise.then(resValue => {
  1725.  
  1726.               const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1727.               isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1728.               if (resValue === 0) {
  1729.                 new Promise(resolve => {
  1730.                   cnt.resolveForDOMRendering781 = resolve;
  1731.                   isLogRequired && console.log("Full Refresh begins");
  1732.                   cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1733.                 }).then(() => {
  1734.                   isLogRequired && console.log("Full Refresh ends");
  1735.                   console.groupEnd();
  1736.                 }).then(lockResolve);
  1737.                 return;
  1738.               }
  1739.  
  1740.               const delayLockResolve = (resValue & 4) === 4;
  1741.  
  1742.               if (delayLockResolve) {
  1743.                 isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1744.                 isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1745.                 isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1746.                 isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1747.                 isLogRequired && console.groupEnd();
  1748.                 // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1749.                 // mutex lock with requestAnimationFrame can also disable participants update in background
  1750.                 requestAnimationFrame(lockResolve);
  1751.               } else {
  1752.                 lockResolve();
  1753.               }
  1754.  
  1755.             });
  1756.  
  1757.           });
  1758.  
  1759.         }
  1760.  
  1761.         return { notifyPath7081 };
  1762.  
  1763.       })();
  1764.  
  1765.  
  1766.       const onRegistryReadyForDataManipulation = () => {
  1767.  
  1768.         function dummy5035(a, b, c) { }
  1769.         function dummy411(a, b, c) { }
  1770.  
  1771.  
  1772.         if (REMOVE_PRELOADAVATARFORADDACTION) {
  1773.  
  1774.           customElements.whenDefined("yt-live-chat-renderer").then(() => {
  1775.  
  1776.             const tag = "yt-live-chat-renderer";
  1777.             const cProto = getProto(document.createElement(tag));
  1778.  
  1779.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  1780.  
  1781.             if (typeof cProto.preloadAvatarForAddAction === 'function' && !cProto.preloadAvatarForAddAction66 && cProto.preloadAvatarForAddAction.length === 1) {
  1782.  
  1783.               cProto.preloadAvatarForAddAction66 = cProto.preloadAvatarForAddAction;
  1784.               cProto.preloadAvatarForAddAction = function () {
  1785.                 //  ===== skip  =====
  1786.  
  1787.                 // if (a.item) {
  1788.                 //   a = a.item;
  1789.                 //   var b = Object.keys(a)[0];
  1790.                 //   a = a[b];
  1791.                 //   b = KC(this.get("authorPhoto.thumbnails", a), 24);
  1792.                 //   "string" === typeof b && (this.preloadImage(b),
  1793.                 //     a.authorPhoto.webThumbnailDetailsExtensionData = {
  1794.                 //       isPreloaded: !0
  1795.                 //     })
  1796.                 // }
  1797.  
  1798.                 //  ===== skip  =====
  1799.               }
  1800.               console.log("cProto.preloadAvatarForAddAction - OK");
  1801.             } else {
  1802.               console.log("cProto.preloadAvatarForAddAction - NG");
  1803.  
  1804.             }
  1805.             console.groupEnd();
  1806.  
  1807.             // cProto.preloadImage = function (){
  1808.             //   // although we do in flushItem; just avoid being used by other usages ...
  1809.             // }
  1810.  
  1811.           });
  1812.  
  1813.         }
  1814.  
  1815.  
  1816.         customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1817.  
  1818.           if (!DO_PARTICIPANT_LIST_HACKS) return;
  1819.  
  1820.           const tag = "yt-live-chat-participant-list-renderer";
  1821.           const cProto = getProto(document.createElement(tag));
  1822.           if (!cProto || typeof cProto.attached !== 'function') {
  1823.             // for _registered, proto.attached shall exist when the element is defined.
  1824.             // for controller extraction, attached shall exist when instance creates.
  1825.             console.warn(`proto.attached for ${tag} is unavailable.`);
  1826.             return;
  1827.           }
  1828.  
  1829.  
  1830.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1831.  
  1832.           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'];
  1833.           const fgs = {};
  1834.           for (const key of fgsArr) fgs[key] = undefined;
  1835.  
  1836.           try {
  1837.             const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1838.             for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1839.           } catch (e) { }
  1840.           console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1841.  
  1842.           const canDoReplacement = (() => {
  1843.             if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1844.               console.warn('YouTube Live Chat Tamer is running.');
  1845.               return;
  1846.             }
  1847.  
  1848.             if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  1849.               console.warn('YouTube Live Chat Tamer is running.');
  1850.               return;
  1851.             }
  1852.  
  1853.             cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  1854.             cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  1855.  
  1856.             if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  1857.               console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  1858.               return;
  1859.             }
  1860.  
  1861.             if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  1862.               console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  1863.               return;
  1864.             }
  1865.  
  1866.             if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  1867.               console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  1868.               return;
  1869.             }
  1870.             return true;
  1871.           })();
  1872.  
  1873.           console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  1874.  
  1875.           assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  1876.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1877.             let fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  1878.             let s = fiRSCB.split('.');
  1879.             if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  1880.               console.log("flushRenderStamperComponentBindings_ - OK", fiRSCB);
  1881.             } else {
  1882.               console.log("flushRenderStamperComponentBindings_ - failed", fiRSCB);
  1883.             }
  1884.           } else {
  1885.             console.log("flushRenderStamperComponentBindings_ - not found");
  1886.           }
  1887.           // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  1888.  
  1889.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1890.             cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  1891.             cProto.flushRenderStamperComponentBindings_ = function () {
  1892.               // console.log('flushRenderStamperComponentBindings_')
  1893.               this.flushRenderStamperComponentBindings66_();
  1894.               if (this.resolveForDOMRendering781) {
  1895.                 this.resolveForDOMRendering781();
  1896.                 this.resolveForDOMRendering781 = null;
  1897.               }
  1898.             };
  1899.           }
  1900.  
  1901.           cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  1902.             const container = ((this || 0).$ || 0).participants;
  1903.             if (!container) return 0;
  1904.             return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  1905.           }
  1906.  
  1907.           const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  1908.  
  1909.           cProto.__attached412__ = cProto.attached;
  1910.           const fpPList = function (hostElement) {
  1911.             const cnt = hostElement.inst || hostElement;
  1912.             if (beforeParticipantsMap.has(cnt)) return;
  1913.             hostElement.classList.add('n9fJ3');
  1914.  
  1915.             assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  1916.             if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  1917.               console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  1918.               return;
  1919.             }
  1920.  
  1921.             groupCollapsed("Participant List attached", "");
  1922.             // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  1923.             //   console.log(123, 'appendChild');
  1924.             //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  1925.             // }
  1926.  
  1927.             // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  1928.             //   console.log(123, 'insertBefore');
  1929.             //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  1930.             // }
  1931.  
  1932.             cnt.__notifyPath5036__ = cnt.notifyPath
  1933.             const participants = ((cnt.participantsManager || 0).participants || 0);
  1934.             assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  1935.             console.log(`initial number of participants: ${participants.length}`);
  1936.             const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  1937.             beforeParticipantsMap.set(cnt, newParticipants);
  1938.             cnt.notifyPath = notifyPath7081;
  1939.             console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  1940.             console.groupEnd();
  1941.           }
  1942.           cProto.attached = function () {
  1943.             fpPList(this.hostElement || this);
  1944.             this.__attached412__.apply(this, arguments);
  1945.           };
  1946.  
  1947.  
  1948.           if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  1949.  
  1950.             /** @type {boolean | (()=>boolean)} */
  1951.             let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  1952.             if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  1953.  
  1954.               let lastMessageDate = 0;
  1955.               cProto.stampDomArray66_ = cProto.stampDomArray_;
  1956.  
  1957.               cProto.stampDomArray_ = function (...args) {
  1958.                 if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  1959.                   if (typeof toUseMaintainStableList === 'function') {
  1960.                     toUseMaintainStableList = toUseMaintainStableList();
  1961.                   }
  1962.                   args[5] = toUseMaintainStableList;
  1963.                   let currentDate = Date.now();
  1964.                   if (currentDate - lastMessageDate > 80) {
  1965.                     lastMessageDate = currentDate;
  1966.                     console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  1967.                   }
  1968.                 }
  1969.                 return this.stampDomArray66_.apply(this, args);
  1970.               }
  1971.  
  1972.               cProto.stampDomArray_.nIegT = 1;
  1973.  
  1974.             }
  1975.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  1976.           } else {
  1977.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  1978.           }
  1979.  
  1980.           console.groupEnd();
  1981.  
  1982.           if (onPageElements.length >= 1) {
  1983.             for (const s of onPageElements) {
  1984.               if ((s.inst || s).isAttached === true) {
  1985.                 fpPList(s);
  1986.               }
  1987.             }
  1988.           }
  1989.  
  1990.         });
  1991.  
  1992.       };
  1993.  
  1994.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  1995.  
  1996.  
  1997.     })();
  1998.  
  1999.     IntersectionObserver && (() => {
  2000.  
  2001.       // dom manipulation
  2002.  
  2003.       class RAFHub {
  2004.         constructor() {
  2005.           /** @type {number} */
  2006.           this.startAt = 8170;
  2007.           /** @type {number} */
  2008.           this.counter = 0;
  2009.           /** @type {number} */
  2010.           this.rid = 0;
  2011.           /** @type {Map<number, FrameRequestCallback>} */
  2012.           this.funcs = new Map();
  2013.           const funcs = this.funcs;
  2014.           /** @type {FrameRequestCallback} */
  2015.           this.bCallback = this.mCallback.bind(this);
  2016.           this.pClear = () => funcs.clear();
  2017.         }
  2018.         /** @param {DOMHighResTimeStamp} highResTime */
  2019.         mCallback(highResTime) {
  2020.           this.rid = 0;
  2021.           Promise.resolve().then(this.pClear);
  2022.           this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  2023.         }
  2024.         /** @param {FrameRequestCallback} f */
  2025.         request(f) {
  2026.           if (this.counter > 1e9) this.counter = 9;
  2027.           let cid = this.startAt + (++this.counter);
  2028.           this.funcs.set(cid, f);
  2029.           if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  2030.           return cid;
  2031.         }
  2032.         /** @param {number} cid */
  2033.         cancel(cid) {
  2034.           cid = +cid;
  2035.           if (cid > 0) {
  2036.             if (cid <= this.startAt) {
  2037.               return cancelAnimationFrame(cid);
  2038.             }
  2039.             if (this.rid > 0) {
  2040.               this.funcs.delete(cid);
  2041.               if (this.funcs.size === 0) {
  2042.                 cancelAnimationFrame(this.rid);
  2043.                 this.rid = 0;
  2044.               }
  2045.             }
  2046.           }
  2047.         }
  2048.       }
  2049.  
  2050.  
  2051.       const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2052.  
  2053.  
  2054.       let dt0 = Date.now() - 2000;
  2055.       const dateNow = () => Date.now() - dt0;
  2056.       // let lastScroll = 0;
  2057.       // let lastLShow = 0;
  2058.       let lastWheel = 0;
  2059.       let lastMouseDown = 0;
  2060.       let lastMouseUp = 0;
  2061.       let currentMouseDown = false;
  2062.       let lastTouchDown = 0;
  2063.       let lastTouchUp = 0;
  2064.       let currentTouchDown = false;
  2065.       let lastUserInteraction = 0;
  2066.  
  2067.       let scrollChatFn = null;
  2068.  
  2069.       let skipDontRender = true; // true first; false by flushActiveItems_
  2070.       let allowDontRender = null;
  2071.  
  2072.       ENABLE_DELAYED_CHAT_OCCURRENCE && (() => {
  2073.  
  2074.         document.addEventListener('animationstart', (evt) => {
  2075.  
  2076.           if (evt.animationName === 'dontRenderAnimation') {
  2077.             evt.target.classList.remove('dont-render');
  2078.             if (scrollChatFn) scrollChatFn();
  2079.           }
  2080.  
  2081.         }, true);
  2082.  
  2083.         const f = (elm) => {
  2084.           if (elm && elm.nodeType === 1) {
  2085.             if (!skipDontRender && allowDontRender === true) {
  2086.               // innerTextFixFn();
  2087.               elm.classList.add('dont-render');
  2088.             }
  2089.           }
  2090.         }
  2091.  
  2092.         Node.prototype.__appendChild931__ = function (a) {
  2093.           a = dr(a);
  2094.           if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2095.             if (a && a.nodeType === 1) f(a);
  2096.             else if (a instanceof DocumentFragment) {
  2097.               for (let n = a.firstChild; n; n = n.nextSibling) {
  2098.                 f(n);
  2099.               }
  2100.             }
  2101.           }
  2102.         }
  2103.  
  2104.         Node.prototype.__appendChild932__ = function () {
  2105.           this.__appendChild931__.apply(this, arguments);
  2106.           return Node.prototype.appendChild.apply(this, arguments);
  2107.         }
  2108.  
  2109.  
  2110.       })();
  2111.  
  2112.  
  2113.       const watchUserCSS = () => {
  2114.  
  2115.         // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2116.  
  2117.         const getElemFromWR = (nr) => {
  2118.           const n = kRef(nr);
  2119.           if (n && n.isConnected) return n;
  2120.           return null;
  2121.         }
  2122.  
  2123.         const clearContentVisibilitySizing = () => {
  2124.           Promise.resolve().then(() => {
  2125.  
  2126.             let btnShowMoreWR = mWeakRef(document.querySelector('#show-more[disabled]'));
  2127.  
  2128.             let lastVisibleItemWR = null;
  2129.             for (const elm of document.querySelectorAll('[wSr93]')) {
  2130.               if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2131.               elm.setAttribute('wSr93', '');
  2132.               // custom CSS property --wsr94 not working when attribute wSr93 removed
  2133.             }
  2134.             requestAnimationFrame(() => {
  2135.               const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2136.               if (btnShowMore) btnShowMore.click();
  2137.               else {
  2138.                 // would not work if switch it frequently
  2139.                 const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2140.                 if (lastVisibleItem) {
  2141.  
  2142.                   Promise.resolve()
  2143.                     .then(() => lastVisibleItem.scrollIntoView())
  2144.                     .then(() => lastVisibleItem.scrollIntoView(false))
  2145.                     .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2146.                     .catch(e => { }) // break the chain when method not callable
  2147.  
  2148.                 }
  2149.               }
  2150.             });
  2151.  
  2152.           });
  2153.  
  2154.         }
  2155.  
  2156.         const mutObserver = new MutationObserver((mutations) => {
  2157.           for (const mutation of mutations) {
  2158.             if ((mutation.addedNodes || 0).length >= 1) {
  2159.               for (const addedNode of mutation.addedNodes) {
  2160.                 if (addedNode.nodeName === 'STYLE') {
  2161.                   clearContentVisibilitySizing();
  2162.                   return;
  2163.                 }
  2164.               }
  2165.             }
  2166.             if ((mutation.removedNodes || 0).length >= 1) {
  2167.               for (const removedNode of mutation.removedNodes) {
  2168.                 if (removedNode.nodeName === 'STYLE') {
  2169.                   clearContentVisibilitySizing();
  2170.                   return;
  2171.                 }
  2172.               }
  2173.             }
  2174.           }
  2175.         });
  2176.  
  2177.         mutObserver.observe(document.documentElement, {
  2178.           childList: true,
  2179.           subtree: false
  2180.         });
  2181.         mutObserver.observe(document.head, {
  2182.           childList: true,
  2183.           subtree: false
  2184.         });
  2185.         mutObserver.observe(document.body, {
  2186.           childList: true,
  2187.           subtree: false
  2188.         });
  2189.  
  2190.       }
  2191.  
  2192.  
  2193.       class WillChangeController {
  2194.         constructor(itemScroller, willChangeValue) {
  2195.           this.element = itemScroller;
  2196.           this.counter = 0;
  2197.           this.active = false;
  2198.           this.willChangeValue = willChangeValue;
  2199.         }
  2200.  
  2201.         beforeOper() {
  2202.           if (!this.active) {
  2203.             this.active = true;
  2204.             this.element.style.willChange = this.willChangeValue;
  2205.           }
  2206.           this.counter++;
  2207.         }
  2208.  
  2209.         afterOper() {
  2210.           const c = this.counter;
  2211.           requestAnimationFrame(() => {
  2212.             if (c === this.counter) {
  2213.               this.active = false;
  2214.               this.element.style.willChange = '';
  2215.             }
  2216.           });
  2217.         }
  2218.  
  2219.         release() {
  2220.           const element = this.element;
  2221.           this.element = null;
  2222.           this.counter = 1e16;
  2223.           this.active = false;
  2224.           try {
  2225.             element.style.willChange = '';
  2226.           } catch (e) { }
  2227.         }
  2228.  
  2229.       }
  2230.  
  2231.  
  2232.       const { lcRendererElm, visObserver } = (() => {
  2233.  
  2234.  
  2235.  
  2236.         let lcRendererWR = null;
  2237.  
  2238.         const lcRendererElm = () => {
  2239.           let lcRenderer = kRef(lcRendererWR);
  2240.           if (!lcRenderer || !lcRenderer.isConnected) {
  2241.             lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2242.             lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2243.           }
  2244.           return lcRenderer;
  2245.         };
  2246.  
  2247.  
  2248.         let hasFirstShowMore = false;
  2249.  
  2250.         const visObserverFn = (entry) => {
  2251.  
  2252.           const target = entry.target;
  2253.           if (!target) return;
  2254.           // if(target.classList.contains('dont-render')) return;
  2255.           let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2256.           // const h = entry.boundingClientRect.height;
  2257.           /*
  2258.           if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2259.               // e.g. under fullscreen. the element created but not rendered.
  2260.               target.setAttribute('wSr93', '');
  2261.               return;
  2262.           }
  2263.           */
  2264.           if (isVisible) {
  2265.             // target.style.setProperty('--wsr94', h + 'px');
  2266.             target.setAttribute('wSr93', 'visible');
  2267.             if (nNextElem(target) === null) {
  2268.  
  2269.               // firstVisibleItemDetected = true;
  2270.               /*
  2271.                 if (dateNow() - lastScroll < 80) {
  2272.                     lastLShow = 0;
  2273.                     lastScroll = 0;
  2274.                     Promise.resolve().then(clickShowMore);
  2275.                 } else {
  2276.                     lastLShow = dateNow();
  2277.                 }
  2278.                 */
  2279.               // lastLShow = dateNow();
  2280.             } else if (!hasFirstShowMore) { // should more than one item being visible
  2281.               // implement inside visObserver to ensure there is sufficient delay
  2282.               hasFirstShowMore = true;
  2283.               requestAnimationFrame(() => {
  2284.                 // foreground page
  2285.                 // page visibly ready -> load the latest comments at initial loading
  2286.                 const lcRenderer = lcRendererElm();
  2287.                 if (lcRenderer) {
  2288.                   (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2289.                 }
  2290.               });
  2291.             }
  2292.           }
  2293.           else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2294.  
  2295.             // target.style.setProperty('--wsr94', h + 'px');
  2296.             target.setAttribute('wSr93', 'hidden');
  2297.           } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2298.  
  2299.         }
  2300.  
  2301.  
  2302.  
  2303.         const visObserver = new IntersectionObserver((entries) => {
  2304.  
  2305.           for (const entry of entries) {
  2306.  
  2307.             Promise.resolve(entry).then(visObserverFn);
  2308.  
  2309.           }
  2310.  
  2311.         }, {
  2312.           // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2313.           rootMargin: "0px",
  2314.           threshold: [0.05, 0.95],
  2315.         });
  2316.  
  2317.  
  2318.         return { lcRendererElm, visObserver }
  2319.  
  2320.  
  2321.       })();
  2322.  
  2323.       let sk35zResolveFn = null;
  2324.  
  2325.       let firstList = true;
  2326.  
  2327.       const { setupMutObserver } = (() => {
  2328.  
  2329.         const mutFn = (items) => {
  2330.           for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2331.             if (node.hasAttribute('wSr93')) break;
  2332.             node.setAttribute('wSr93', '');
  2333.             visObserver.observe(node);
  2334.           }
  2335.         }
  2336.  
  2337.         const mutObserver = new MutationObserver((mutations) => {
  2338.           const items = (mutations[0] || 0).target;
  2339.           if (!items) return;
  2340.           if (sk35zResolveFn) {
  2341.             sk35zResolveFn();
  2342.             sk35zResolveFn = null;
  2343.           }
  2344.           mutFn(items);
  2345.         });
  2346.  
  2347.         const setupMutObserver = (m2) => {
  2348.           scrollChatFn = null;
  2349.           mutObserver.disconnect();
  2350.           mutObserver.takeRecords();
  2351.           if (m2) {
  2352.             if (typeof m2.__appendChild932__ === 'function') {
  2353.               if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2354.               if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2355.             }
  2356.             mutObserver.observe(m2, {
  2357.               childList: true,
  2358.               subtree: false
  2359.             });
  2360.             mutFn(m2);
  2361.  
  2362.             let isFirstList = firstList;
  2363.             firstList = false;
  2364.  
  2365.             if (ENABLE_OVERFLOW_ANCHOR) {
  2366.  
  2367.               let items = m2;
  2368.               let addedAnchor = false;
  2369.               if (items) {
  2370.                 if (items.nextElementSibling === null) {
  2371.                   items.classList.add('no-anchor');
  2372.                   addedAnchor = true;
  2373.                   items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2374.                 }
  2375.               }
  2376.  
  2377.  
  2378.  
  2379.               if (addedAnchor) {
  2380.                 nodeParent(m2).classList.add('no-anchor'); // required
  2381.               }
  2382.  
  2383.             }
  2384.  
  2385.             // let div = document.createElement('div');
  2386.             // div.id = 'qwcc';
  2387.             // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2388.             // bufferRegion =div;
  2389.  
  2390.             // buffObserver.takeRecords();
  2391.             // buffObserver.disconnect();
  2392.             // buffObserver.observe(div,  {
  2393.             //     childList: true,
  2394.             //     subtree: false
  2395.             // })
  2396.  
  2397.             if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2398.  
  2399.               promiseForCustomYtElementsReady.then(() => {
  2400.  
  2401.                 customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2402.  
  2403.                   setTimeout(() => {
  2404.  
  2405.                     /** @type {HTMLTemplateElement} */
  2406.                     let skz = document.createElement('yt-live-chat-text-message-renderer');
  2407.  
  2408.                     let cz1 = null;
  2409.  
  2410.                     if (skz && 'data' in skz && 'attached' in skz) {
  2411.  
  2412.                       const deferredZy1 = new Promise(resolve => {
  2413.  
  2414.                         skz.attached = function () {
  2415.                           cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2416.                           resolve(skz.textContent);
  2417.                         }
  2418.                         skz.detached = function () {
  2419.  
  2420.                         }
  2421.  
  2422.                       });
  2423.                       skz.id = 'sk35z';
  2424.                       skz.data = {
  2425.                         "message": {
  2426.                           "runs": [
  2427.                             {
  2428.                               "text": "em2o"
  2429.                             },
  2430.                             {
  2431.                               "emoji": {
  2432.                                 "emojiId": "cm35z",
  2433.                                 "shortcuts": [
  2434.                                   ":_s:",
  2435.                                   ":s:"
  2436.                                 ],
  2437.                                 "searchTerms": [
  2438.                                   "_s",
  2439.                                   "s"
  2440.                                 ],
  2441.                                 "image": {
  2442.                                   "thumbnails": [
  2443.                                     {
  2444.                                       "url": "data:image/webp;base64,UklGRjAB",
  2445.                                       "width": 48,
  2446.                                       "height": 48
  2447.                                     }
  2448.                                   ],
  2449.                                   "accessibility": {
  2450.                                     "accessibilityData": {
  2451.                                       "label": "s"
  2452.                                     }
  2453.                                   }
  2454.                                 },
  2455.                                 "isCustomEmoji": true
  2456.                               }
  2457.                             },
  2458.                             {
  2459.                               "text": "ji"
  2460.                             }
  2461.                           ]
  2462.                         },
  2463.                         "authorName": {
  2464.                           "simpleText": "N"
  2465.                         },
  2466.                         "authorPhoto": {
  2467.                           "thumbnails": [
  2468.                             {
  2469.                               "url": "data:image/webp;base64,UklGRjAB",
  2470.                               "width": 64,
  2471.                               "height": 64
  2472.                             }
  2473.                           ]
  2474.                         },
  2475.                         "contextMenuEndpoint": {
  2476.                           "commandMetadata": {
  2477.                             "webCommandMetadata": {
  2478.                               "ignoreNavigation": true
  2479.                             }
  2480.                           },
  2481.                           "liveChatItemContextMenuEndpoint": {
  2482.                             "params": "123=="
  2483.                           }
  2484.                         },
  2485.                         "id": "sk35z",
  2486.                         "timestampUsec": "1232302352350000",
  2487.                         "authorBadges": [
  2488.                           {
  2489.                             "liveChatAuthorBadgeRenderer": {
  2490.                               "customThumbnail": {
  2491.                                 "thumbnails": [
  2492.                                   {
  2493.                                     "url": "data:image/webp;base64,UklGRjAB",
  2494.                                     "width": 16,
  2495.                                     "height": 16
  2496.                                   },
  2497.                                   {
  2498.                                     "url": "data:image/webp;base64,UklGRjAB",
  2499.                                     "width": 32,
  2500.                                     "height": 32
  2501.                                   }
  2502.                                 ]
  2503.                               },
  2504.                               "tooltip": "T",
  2505.                               "accessibility": {
  2506.                                 "accessibilityData": {
  2507.                                   "label": "E"
  2508.                                 }
  2509.                               }
  2510.                             }
  2511.                           }
  2512.                         ],
  2513.                         "authorExternalChannelId": "A",
  2514.                         "contextMenuAccessibility": {
  2515.                           "accessibilityData": {
  2516.                             "label": "E"
  2517.                           }
  2518.                         },
  2519.                         "timestampText": {
  2520.                           "simpleText": "0:43"
  2521.                         }
  2522.                       };
  2523.  
  2524.  
  2525.                       sk35zResolveFn = null;
  2526.                       const deferredMutation = new Promise(resolve => {
  2527.                         sk35zResolveFn = resolve;
  2528.                         HTMLElement.prototype.appendChild.call(m2, skz);
  2529.                       });
  2530.  
  2531.                       Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2532.                         const [zy1, _] = res;
  2533.                         function fn() {
  2534.                           const zy2 = skz.textContent;
  2535.                           const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2536.                           if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2537.                             allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2538.                           }
  2539.                           if (allowDontRender === false) {
  2540.  
  2541.                             console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2542.                               "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2543.                               "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2544.                             );
  2545.  
  2546.                             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');
  2547.  
  2548.                             console.groupEnd();
  2549.                           } else if (allowDontRender === true) {
  2550.                             return true;
  2551.                           }
  2552.                         }
  2553.                         await new Promise(r => setTimeout(r, 1));
  2554.                         if (fn()) {
  2555.                           await new Promise(r => requestAnimationFrame(r));
  2556.                           if (fn()) {
  2557.                             skz.remove();
  2558.                             skz.textContent = '';
  2559.                             console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #11ad44; color: #102624; padding: 2px 4px');
  2560.                           }
  2561.                         }
  2562.                       });
  2563.  
  2564.                     }
  2565.  
  2566.                   }, 1);
  2567.  
  2568.                 })
  2569.  
  2570.               })
  2571.  
  2572.             }
  2573.  
  2574.  
  2575.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2576.  
  2577.               (() => {
  2578.  
  2579.                 const tag = 'yt-iframed-player-events-relay'
  2580.                 const dummy = document.createElement(tag);
  2581.  
  2582.                 const cProto = getProto(dummy);
  2583.                 if (!cProto || !cProto.handlePostMessage_) {
  2584.                   console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2585.                   return;
  2586.                 }
  2587.  
  2588.                 if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2589.  
  2590.                   cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2591.  
  2592.                   cProto.handlePostMessage_ = function (a) {
  2593.  
  2594.                     const da = (a || 0).data || 0;
  2595.                     if (typeof da === 'object') {
  2596.  
  2597.                       // console.log('handlePostMessage_', da)
  2598.                       const qc = da['yt-player-state-change'];
  2599.                       if (qc === 3) { // pause
  2600.                         pairForPauseResume++;
  2601.                         pairForPauseResumeM++;
  2602.                       } else if (qc === 1) { // pause
  2603.                         pairForPauseResume++;
  2604.                         pairForPauseResumeM++;
  2605.                       } else if (qc === 2) {
  2606.                         pairForPauseResume++;
  2607.                         pairForPauseResumeM++;
  2608.                       }
  2609.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  2610.                       if (pairForPauseResumeM > 1e9) pairForPauseResumeM = pairForPauseResumeM % 1e4;
  2611.                       return this.handlePostMessage66_(a);
  2612.  
  2613.                     }
  2614.  
  2615.  
  2616.                   }
  2617.  
  2618.                 }
  2619.  
  2620.  
  2621.               })();
  2622.  
  2623.             }
  2624.  
  2625.  
  2626.           }
  2627.         }
  2628.  
  2629.         return { setupMutObserver };
  2630.  
  2631.  
  2632.  
  2633.       })();
  2634.  
  2635.       const setupEvents = () => {
  2636.  
  2637.  
  2638.         let scrollCount = 0;
  2639.  
  2640.         const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2641.  
  2642.  
  2643.         const delayFlushActiveItemsAfterUserActionK_ = () => {
  2644.  
  2645.           const lcRenderer = lcRendererElm();
  2646.           if (lcRenderer) {
  2647.             const cnt = (lcRenderer.inst || lcRenderer);
  2648.             if (!cnt.hasUserJustInteracted11_) return;
  2649.             if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2650.               cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2651.             }
  2652.           }
  2653.  
  2654.         }
  2655.  
  2656.         document.addEventListener('scroll', (evt) => {
  2657.           if (!evt || !evt.isTrusted) return;
  2658.           // lastScroll = dateNow();
  2659.           if (++scrollCount > 1e9) scrollCount = 9;
  2660.         }, passiveCapture); // support contain => support passive
  2661.  
  2662.         let lastScrollCount = -1;
  2663.         document.addEventListener('wheel', (evt) => {
  2664.           if (!evt || !evt.isTrusted) return;
  2665.           if (lastScrollCount === scrollCount) return;
  2666.           lastScrollCount = scrollCount;
  2667.           lastWheel = dateNow();
  2668.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2669.         }, passiveCapture); // support contain => support passive
  2670.  
  2671.         document.addEventListener('mousedown', (evt) => {
  2672.           if (!evt || !evt.isTrusted) return;
  2673.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2674.           lastMouseDown = dateNow();
  2675.           currentMouseDown = true;
  2676.           lastUserInteraction = lastMouseDown;
  2677.         }, passiveCapture);
  2678.  
  2679.         document.addEventListener('pointerdown', (evt) => {
  2680.           if (!evt || !evt.isTrusted) return;
  2681.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2682.           lastMouseDown = dateNow();
  2683.           currentMouseDown = true;
  2684.           lastUserInteraction = lastMouseDown;
  2685.         }, passiveCapture);
  2686.  
  2687.         document.addEventListener('click', (evt) => {
  2688.           if (!evt || !evt.isTrusted) return;
  2689.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2690.           lastMouseDown = lastMouseUp = dateNow();
  2691.           currentMouseDown = false;
  2692.           lastUserInteraction = lastMouseDown;
  2693.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2694.         }, passiveCapture);
  2695.  
  2696.         document.addEventListener('tap', (evt) => {
  2697.           if (!evt || !evt.isTrusted) return;
  2698.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2699.           lastMouseDown = lastMouseUp = dateNow();
  2700.           currentMouseDown = false;
  2701.           lastUserInteraction = lastMouseDown;
  2702.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2703.         }, passiveCapture);
  2704.  
  2705.  
  2706.         document.addEventListener('mouseup', (evt) => {
  2707.           if (!evt || !evt.isTrusted) return;
  2708.           if (currentMouseDown) {
  2709.             lastMouseUp = dateNow();
  2710.             currentMouseDown = false;
  2711.             lastUserInteraction = lastMouseUp;
  2712.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2713.           }
  2714.         }, passiveCapture);
  2715.  
  2716.  
  2717.         document.addEventListener('pointerup', (evt) => {
  2718.           if (!evt || !evt.isTrusted) return;
  2719.           if (currentMouseDown) {
  2720.             lastMouseUp = dateNow();
  2721.             currentMouseDown = false;
  2722.             lastUserInteraction = lastMouseUp;
  2723.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2724.           }
  2725.         }, passiveCapture);
  2726.  
  2727.         document.addEventListener('touchstart', (evt) => {
  2728.           if (!evt || !evt.isTrusted) return;
  2729.           lastTouchDown = dateNow();
  2730.           currentTouchDown = true;
  2731.           lastUserInteraction = lastTouchDown;
  2732.         }, passiveCapture);
  2733.  
  2734.         document.addEventListener('touchmove', (evt) => {
  2735.           if (!evt || !evt.isTrusted) return;
  2736.           lastTouchDown = dateNow();
  2737.           currentTouchDown = true;
  2738.           lastUserInteraction = lastTouchDown;
  2739.         }, passiveCapture);
  2740.  
  2741.         document.addEventListener('touchend', (evt) => {
  2742.           if (!evt || !evt.isTrusted) return;
  2743.           if (currentTouchDown) {
  2744.             lastTouchUp = dateNow();
  2745.             currentTouchDown = false;
  2746.             lastUserInteraction = lastTouchUp;
  2747.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2748.           }
  2749.         }, passiveCapture);
  2750.  
  2751.         document.addEventListener('touchcancel', (evt) => {
  2752.           if (!evt || !evt.isTrusted) return;
  2753.           if (currentTouchDown) {
  2754.             lastTouchUp = dateNow();
  2755.             currentTouchDown = false;
  2756.             lastUserInteraction = lastTouchUp;
  2757.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2758.           }
  2759.         }, passiveCapture);
  2760.  
  2761.  
  2762.       }
  2763.  
  2764.  
  2765.       const onRegistryReadyForDOMOperations = () => {
  2766.         let firstCheckedOnYtInit = false;
  2767.  
  2768.         const mightFirstCheckOnYtInit = () => {
  2769.           if (firstCheckedOnYtInit) return;
  2770.           firstCheckedOnYtInit = true;
  2771.  
  2772.           if (!document.body || !document.head) return;
  2773.  
  2774.           if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2775.  
  2776.           addCssManaged();
  2777.  
  2778.           let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2779.           if (efsContainer && efsContainer.parentNode !== document.body) {
  2780.             document.body.appendChild(efsContainer);
  2781.           }
  2782.  
  2783.  
  2784.         }
  2785.  
  2786.         if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2787.         // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2788.  
  2789.         if (document.documentElement && document.head) {
  2790.  
  2791.           addCssManaged();
  2792.  
  2793.         }
  2794.         // console.log(document.body===null)
  2795.  
  2796.         customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2797.  
  2798.  
  2799.           const tag = "yt-live-chat-item-list-renderer"
  2800.           const dummy = document.createElement(tag);
  2801.  
  2802.  
  2803.           const cProto = getProto(dummy);
  2804.           if (!cProto || !cProto.attached) {
  2805.             console.warn(`proto.attached for ${tag} is unavailable.`);
  2806.             return;
  2807.           }
  2808.  
  2809.  
  2810.           mightFirstCheckOnYtInit();
  2811.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2812.           console.log("[Begin]");
  2813.  
  2814.           const mclp = cProto;
  2815.           try {
  2816.             assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2817.             assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2818.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2819.             assertor(() => typeof mclp.setAtBottom === 'function');
  2820.             assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2821.             assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2822.           } catch (e) { }
  2823.  
  2824.  
  2825.           try {
  2826.             assertor(() => typeof mclp.attached === 'function');
  2827.             assertor(() => typeof mclp.detached === 'function');
  2828.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2829.             assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2830.             assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2831.             assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2832.             assertor(() => typeof mclp.smoothScroll_ === 'function');
  2833.             assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2834.           } catch (e) { }
  2835.  
  2836.           mclp.__intermediate_delay__ = null;
  2837.  
  2838.           let mzk = 0;
  2839.           let myk = 0;
  2840.           let mlf = 0;
  2841.           let myw = 0;
  2842.           let mzt = 0;
  2843.           let zarr = null;
  2844.           let mlg = 0;
  2845.  
  2846.           if ((mclp.clearList || 0).length === 0) {
  2847.             assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2848.             mclp.clearList66 = mclp.clearList;
  2849.             mclp.clearList = function () {
  2850.               mzk++;
  2851.               myk++;
  2852.               mlf++;
  2853.               myw++;
  2854.               mzt++;
  2855.               mlg++;
  2856.               zarr = null;
  2857.               this.__intermediate_delay__ = null;
  2858.               this.clearList66();
  2859.             };
  2860.             console.log("clearList", "OK");
  2861.           } else {
  2862.             console.log("clearList", "NG");
  2863.           }
  2864.  
  2865.  
  2866.           let onListRendererAttachedDone = false;
  2867.  
  2868.           function setList(itemOffset, items) {
  2869.  
  2870.             const isFirstTime = onListRendererAttachedDone === false;
  2871.  
  2872.             if (isFirstTime) {
  2873.               onListRendererAttachedDone = true;
  2874.               Promise.resolve().then(watchUserCSS);
  2875.               addCssManaged();
  2876.               setupEvents();
  2877.             }
  2878.  
  2879.             setupStyle(itemOffset, items);
  2880.  
  2881.             setupMutObserver(items);
  2882.           }
  2883.  
  2884.           mclp.attached419 = async function () {
  2885.  
  2886.             if (!this.isAttached) return;
  2887.  
  2888.             let maxTrial = 16;
  2889.             while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  2890.               if (--maxTrial < 0 || !this.isAttached) return;
  2891.               await new Promise(requestAnimationFrame);
  2892.             }
  2893.  
  2894.             if (this.isAttached !== true) return;
  2895.  
  2896.             if (!this.$) {
  2897.               console.warn("!this.$");
  2898.               return;
  2899.             }
  2900.             if (!this.$) return;
  2901.             /** @type {HTMLElement | null} */
  2902.             const itemScroller = this.$['item-scroller'];
  2903.             /** @type {HTMLElement | null} */
  2904.             const itemOffset = this.$['item-offset'];
  2905.             /** @type {HTMLElement | null} */
  2906.             const items = this.$['items'];
  2907.  
  2908.             if (!itemScroller || !itemOffset || !items) {
  2909.               console.warn("items.parentNode !== itemOffset");
  2910.               return;
  2911.             }
  2912.  
  2913.             if (nodeParent(items) !== itemOffset) {
  2914.  
  2915.               console.warn("items.parentNode !== itemOffset");
  2916.               return;
  2917.             }
  2918.  
  2919.  
  2920.             if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  2921.  
  2922.               console.warn("id incorrect");
  2923.               return;
  2924.             }
  2925.  
  2926.             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')
  2927.  
  2928.             if (!isTargetItems) {
  2929.               console.warn("!isTargetItems");
  2930.               return;
  2931.             }
  2932.  
  2933.             setList(itemOffset, items);
  2934.  
  2935.           }
  2936.  
  2937.           mclp.attached331 = mclp.attached;
  2938.           mclp.attached = function () {
  2939.             this.attached419 && this.attached419();
  2940.             return this.attached331();
  2941.           }
  2942.  
  2943.           mclp.detached331 = mclp.detached;
  2944.  
  2945.           mclp.detached = function () {
  2946.             setupMutObserver();
  2947.             return this.detached331();
  2948.           }
  2949.  
  2950.           const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  2951.           for (const t29 of t29s) {
  2952.             if ((t29.inst || t29).isAttached === true) {
  2953.               t29.attached419();
  2954.             }
  2955.           }
  2956.  
  2957.           if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  2958.  
  2959.             assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  2960.             assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  2961.  
  2962.             /** @type {Map<number, any>} */
  2963.             const aMap = new Map();
  2964.             let count = 6150;
  2965.             mclp.async66 = mclp.async;
  2966.             mclp.async = function (e, f) {
  2967.               // ensure the previous operation is done
  2968.               // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  2969.               const hasF = arguments.length === 2;
  2970.               const stack = new Error().stack;
  2971.               const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  2972.               if (count > 1e9) count = 6159;
  2973.               const resId = ++count;
  2974.               aMap.set(resId, e);
  2975.               (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  2976.                 const rp = aMap.get(resId);
  2977.                 if (typeof rp !== 'function') {
  2978.                   return;
  2979.                 }
  2980.                 let cancelCall = false;
  2981.                 if (isFlushAsync) {
  2982.                   if (rk < 0) {
  2983.                     cancelCall = true;
  2984.                   } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  2985.                     cancelCall = true;
  2986.                   }
  2987.                 }
  2988.                 if (cancelCall) {
  2989.                   aMap.delete(resId);
  2990.                 } else {
  2991.                   const asyncEn = function () {
  2992.                     aMap.delete(resId);
  2993.                     return rp.apply(this, arguments);
  2994.                   };
  2995.                   aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  2996.                 }
  2997.               });
  2998.  
  2999.               return resId;
  3000.             }
  3001.  
  3002.             mclp.cancelAsync66 = mclp.cancelAsync;
  3003.             mclp.cancelAsync = function (resId) {
  3004.               if (resId <= 6150) {
  3005.                 this.cancelAsync66(resId);
  3006.               } else if (aMap.has(resId)) {
  3007.                 const rp = aMap.get(resId);
  3008.                 aMap.delete(resId);
  3009.                 if (typeof rp !== 'function') {
  3010.                   this.cancelAsync66(rp);
  3011.                 }
  3012.               }
  3013.             }
  3014.  
  3015.             console.log("async", "OK");
  3016.           } else {
  3017.             console.log("async", "NG");
  3018.           }
  3019.  
  3020.  
  3021.           if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3022.  
  3023.             assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3024.             mclp.showNewItems66_ = mclp.showNewItems_;
  3025.  
  3026.             mclp.showNewItems77_ = async function () {
  3027.               if (myk > 1e9) myk = 9;
  3028.               let tid = ++myk;
  3029.  
  3030.               await new Promise(requestAnimationFrame);
  3031.  
  3032.               if (tid !== myk) {
  3033.                 return;
  3034.               }
  3035.  
  3036.               const cnt = this;
  3037.  
  3038.               await Promise.resolve();
  3039.               cnt.showNewItems66_();
  3040.  
  3041.               await Promise.resolve();
  3042.  
  3043.             }
  3044.  
  3045.             mclp.showNewItems_ = function () {
  3046.  
  3047.               const cnt = this;
  3048.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3049.                 cnt.showNewItems77_().then(() => {
  3050.                   resolve();
  3051.                 });
  3052.               });
  3053.             }
  3054.  
  3055.             console.log("showNewItems_", "OK");
  3056.           } else {
  3057.             console.log("showNewItems_", "NG");
  3058.           }
  3059.  
  3060.  
  3061.           if ((mclp.flushActiveItems_ || 0).length === 0) {
  3062.  
  3063.             assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3064.  
  3065.             let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3066.  
  3067.             let contensWillChangeController = null;
  3068.  
  3069.             mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3070.  
  3071.             mclp.flushActiveItems78_ = async function (tid) {
  3072.               try {
  3073.                 if (tid !== mlf) return;
  3074.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3075.                 let logger = false;
  3076.                 const cnt = this;
  3077.                 let immd = cnt.__intermediate_delay__;
  3078.                 await new Promise(requestAnimationFrame);
  3079.  
  3080.                 if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3081.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3082.  
  3083.                 mlf++;
  3084.                 if (mlg > 1e9) mlg = 9;
  3085.                 ++mlg;
  3086.  
  3087.                 const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3088.                 const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3089.                 let changeMaxItemsToDisplay = false;
  3090.                 const activeItemsLen = this.activeItems_.length;
  3091.                 if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3092.                   logger = true;
  3093.  
  3094.                   groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3095.  
  3096.                   logger && console.log('[Begin]')
  3097.  
  3098.                   console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3099.                   if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3100.                     console.log('reduce maxitems');
  3101.                     if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3102.                       // as all the rendered chats are already "outdated"
  3103.                       // all old chats shall remove and reduced number of few chats will be rendered
  3104.                       // then restore to the original number
  3105.                       changeMaxItemsToDisplay = true;
  3106.                       this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3107.                       console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3108.                     }
  3109.                     this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3110.                     //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3111.  
  3112.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3113.                   } else {
  3114.                     this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3115.  
  3116.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3117.                   }
  3118.                 }
  3119.                 // it is found that it will render all stacked chats after switching back from background
  3120.                 // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3121.                 // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3122.  
  3123.  
  3124.                 const items = (cnt.$ || 0).items;
  3125.  
  3126.                 if (USE_WILL_CHANGE_CONTROLLER) {
  3127.                   if (contensWillChangeController && contensWillChangeController.element !== items) {
  3128.                     contensWillChangeController.release();
  3129.                     contensWillChangeController = null;
  3130.                   }
  3131.                   if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3132.                 }
  3133.                 const wcController = contensWillChangeController;
  3134.                 cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3135.                 wcController && wcController.beforeOper();
  3136.                 await Promise.resolve();
  3137.                 const acItems = cnt.activeItems_;
  3138.                 const len1 = acItems.length;
  3139.                 if(!len1) console.warn('cnt.activeItems_.length = 0');
  3140.                 let waitFor = [];
  3141.  
  3142.  
  3143.                 /** @type {Set<string>} */
  3144.                 const imageLinks = new Set();
  3145.  
  3146.                 if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3147.                   for (const item of acItems) {
  3148.                     fixLiveChatItem(item, imageLinks);
  3149.                   }
  3150.                 }
  3151.                 if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3152.                   if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3153.                   if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3154.  
  3155.                   // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3156.                   const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3157.                   // preload performs the high priority fetching.
  3158.                   // prefetch delays the chat display if the video resoruce is demanding.
  3159.  
  3160.                   if (rel) {
  3161.  
  3162.                     imageLinks.forEach(imageLink => {
  3163.                       let d = false;
  3164.                       const isEmoji = imageLink.includes('/emoji/');
  3165.                       const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3166.                       if (!pretechedSet.has(imageLink)) {
  3167.                         pretechedSet.add(imageLink);
  3168.                         d = true;
  3169.                       }
  3170.                       if (d) {
  3171.                         waitFor.push(linker(null, rel, imageLink, 'image'));
  3172.  
  3173.                       }
  3174.                     })
  3175.  
  3176.                   }
  3177.  
  3178.                 }
  3179.  
  3180.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3181.                 // console.log('ss1', Date.now())
  3182.                 if (waitFor.length > 0) {
  3183.                   await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3184.                 }
  3185.                 waitFor.length = 0;
  3186.                 waitFor = null;
  3187.                 // console.log('ss2', Date.now())
  3188.                 cnt.flushActiveItems66_();
  3189.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3190.                 const len2 = cnt.activeItems_.length;
  3191.                 const bAsync = len1 !== len2;
  3192.                 await Promise.resolve();
  3193.                 if (wcController) {
  3194.                   if (bAsync) {
  3195.                     cnt.async(() => {
  3196.                       wcController.afterOper();
  3197.                     });
  3198.                   } else {
  3199.                     wcController.afterOper();
  3200.                   }
  3201.                 }
  3202.                 if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3203.                   this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3204.  
  3205.                   logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3206.                   //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3207.                 } else if (changeMaxItemsToDisplay) {
  3208.  
  3209.                   logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3210.                     maxItemsToDisplay: this.data.maxItemsToDisplay,
  3211.                     reducedMaxItemsToDisplay,
  3212.                     originalMaxItemsToDisplay: tmpMaxItemsCount
  3213.                   });
  3214.                 }
  3215.                 logger && console.log('[End]')
  3216.  
  3217.                 logger && console.groupEnd();
  3218.  
  3219.                 if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3220.  
  3221.  
  3222.                   const ff = () => {
  3223.  
  3224.                     if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3225.                     //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3226.                     if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3227.                       cnt.scrollToBottom_();
  3228.  
  3229.                       Promise.resolve().then(() => {
  3230.  
  3231.                         if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3232.                         if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3233.                       });
  3234.  
  3235.  
  3236.                     }
  3237.                   }
  3238.  
  3239.                   ff();
  3240.  
  3241.  
  3242.                   Promise.resolve().then(ff);
  3243.  
  3244.                   // requestAnimationFrame(ff);
  3245.                 } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3246.  
  3247.                   const knt = cnt;
  3248.                   if (!scrollChatFn) {
  3249.                     const cnt = knt;
  3250.                     const f = () => {
  3251.                       const itemScroller = cnt.itemScroller;
  3252.                       if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3253.                       if (!cnt.atBottom) {
  3254.                         cnt.scrollToBottom_();
  3255.                       } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3256.                         itemScroller.scrollTop = itemScroller.scrollHeight;
  3257.                       }
  3258.                     };
  3259.                     scrollChatFn = () => Promise.resolve().then(f).then(f);
  3260.                   }
  3261.  
  3262.                   if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3263.                 }
  3264.  
  3265.                 return 1;
  3266.  
  3267.  
  3268.               } catch (e) {
  3269.                 console.warn(e);
  3270.               }
  3271.             }
  3272.  
  3273.             mclp.flushActiveItems77_ = function () {
  3274.  
  3275.               return new Promise(resResolve => {
  3276.                 try {
  3277.                   const cnt = this;
  3278.                   if (mlf > 1e9) mlf = 9;
  3279.                   let tid = ++mlf;
  3280.                   const hostElement = cnt.hostElement || cnt;
  3281.                   if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3282.                   if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3283.  
  3284.                   // 4 times to maxItems to avoid frequent trimming.
  3285.                   // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3286.  
  3287.                   const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3288.                   this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3289.                   if (cnt.canScrollToBottom_()) {
  3290.                     cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3291.                       .then(() => cnt.flushActiveItems78_(tid)) // async function
  3292.                       .then((asyncResult) => {
  3293.                         resResolve(asyncResult); // either undefined or 1
  3294.                         resResolve = null;
  3295.                       }).catch((e) => {
  3296.                         console.warn(e);
  3297.                         if (resResolve) resResolve();
  3298.                       });
  3299.                   } else {
  3300.                     resResolve(2);
  3301.                     resResolve = null;
  3302.                   }
  3303.                 } catch (e) {
  3304.                   console.warn(e);
  3305.                   if (resResolve) resResolve();
  3306.                 }
  3307.  
  3308.  
  3309.               });
  3310.  
  3311.             }
  3312.  
  3313.             mclp.flushActiveItems_ = function () {
  3314.               const cnt = this;
  3315.  
  3316.               if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3317.  
  3318.               if (cnt.activeItems_.length === 0) {
  3319.                 cnt.__intermediate_delay__ = null;
  3320.                 return;
  3321.               }
  3322.  
  3323.               const cntData = ((cnt || 0).data || 0);
  3324.               if (cntData.maxItemsToDisplay944 === undefined) {
  3325.                 cntData.maxItemsToDisplay944 = null;
  3326.                 if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3327.                 cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3328.               }
  3329.  
  3330.               // ignore previous __intermediate_delay__ and create a new one
  3331.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3332.                 cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3333.                   if (rt === 1) {
  3334.                     resolve(1); // success, scroll to bottom
  3335.                     if (hasMoreMessageState === 1) {
  3336.                       hasMoreMessageState = 0;
  3337.                       const showMore = (cnt.$ || 0)['show-more'];
  3338.                       if (showMore) {
  3339.                         showMore.classList.remove('has-new-messages-miuzp');
  3340.                       }
  3341.                     }
  3342.                   }
  3343.                   else if (rt === 2) {
  3344.                     resolve(2); // success, trim
  3345.                     if (hasMoreMessageState === 0) {
  3346.                       hasMoreMessageState = 1;
  3347.                       const showMore = cnt.$['show-more'];
  3348.                       if (showMore) {
  3349.                         showMore.classList.add('has-new-messages-miuzp');
  3350.                       }
  3351.                     }
  3352.                   }
  3353.                   else resolve(-1); // skip
  3354.                 }).catch(e => {
  3355.                   console.warn(e);
  3356.                 });
  3357.               });
  3358.  
  3359.             }
  3360.             console.log("flushActiveItems_", "OK");
  3361.           } else {
  3362.             console.log("flushActiveItems_", "NG");
  3363.           }
  3364.  
  3365.           mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3366.             try {
  3367.               if (mlg > 1e9) mlg = 9;
  3368.               const tid = ++mlg;
  3369.               const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3370.               const runCond = () => this.canScrollToBottom_();
  3371.               if (!keepTrialCond()) return;
  3372.               if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3373.               await new Promise(r => setTimeout(r, 80));
  3374.               if (!keepTrialCond()) return;
  3375.               if (runCond()) return this.flushActiveItems_() | 1;
  3376.               await new Promise(requestAnimationFrame);
  3377.               if (runCond()) return this.flushActiveItems_() | 1;
  3378.             } catch (e) {
  3379.               console.warn(e);
  3380.             }
  3381.           }
  3382.  
  3383.           if ((mclp.atBottomChanged_ || 0).length === 1) {
  3384.             // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3385.             assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3386.  
  3387.             const querySelector = HTMLElement.prototype.querySelector;
  3388.             const U = (element) => ({
  3389.               querySelector: (selector) => querySelector.call(element, selector)
  3390.             });
  3391.  
  3392.             let qid = 0;
  3393.             mclp.atBottomChanged_ = function (a) {
  3394.               let tid = ++qid;
  3395.               let b = this;
  3396.               a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3397.                 if (tid !== qid) return;
  3398.                 U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3399.               }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3400.                 this.hideShowMoreAsync_ = null,
  3401.                 U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3402.             }
  3403.  
  3404.             console.log("atBottomChanged_", "OK");
  3405.           } else {
  3406.             console.log("atBottomChanged_", "NG");
  3407.           }
  3408.  
  3409.           if ((mclp.onScrollItems_ || 0).length === 1) {
  3410.  
  3411.             assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3412.             mclp.onScrollItems66_ = mclp.onScrollItems_;
  3413.             mclp.onScrollItems77_ = async function (evt) {
  3414.               if (myw > 1e9) myw = 9;
  3415.               let tid = ++myw;
  3416.  
  3417.               await new Promise(requestAnimationFrame);
  3418.  
  3419.               if (tid !== myw) {
  3420.                 return;
  3421.               }
  3422.  
  3423.               const cnt = this;
  3424.  
  3425.               await Promise.resolve();
  3426.               if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3427.                 await Promise.resolve().then(() => {
  3428.                   this.ytRendererBehavior.onScroll(evt);
  3429.                 }).then(() => {
  3430.                   if (this.canScrollToBottom_()) {
  3431.                     const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3432.                     if (hasUserJustInteracted) {
  3433.                       // only when there is an user action
  3434.                       this.setAtBottom();
  3435.                       return 1;
  3436.                     }
  3437.                   } else {
  3438.                     // no message inserting
  3439.                     this.setAtBottom();
  3440.                     return 1;
  3441.                   }
  3442.                 }).then((r) => {
  3443.  
  3444.                   if (this.activeItems_.length) {
  3445.  
  3446.                     if (this.canScrollToBottom_()) {
  3447.                       this.flushActiveItems_();
  3448.                       return 1 && r;
  3449.                     } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3450.                       // delayed due to user action
  3451.                       this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3452.                       return 0;
  3453.                     }
  3454.                   }
  3455.                 }).then((r) => {
  3456.                   if (r) {
  3457.                     // ensure setAtBottom is correctly set
  3458.                     this.setAtBottom();
  3459.                   }
  3460.                 });
  3461.               } else {
  3462.                 cnt.onScrollItems66_(evt);
  3463.               }
  3464.  
  3465.               await Promise.resolve();
  3466.  
  3467.             }
  3468.  
  3469.             mclp.onScrollItems_ = function (evt) {
  3470.  
  3471.               const cnt = this;
  3472.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3473.                 cnt.onScrollItems77_(evt).then(() => {
  3474.                   resolve();
  3475.                 });
  3476.               });
  3477.             }
  3478.             console.log("onScrollItems_", "OK");
  3479.           } else {
  3480.             console.log("onScrollItems_", "NG");
  3481.           }
  3482.  
  3483.           if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3484.  
  3485.             assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3486.             mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3487.  
  3488.             mclp.handleLiveChatActions77_ = async function (arr) {
  3489.               if (typeof (arr || 0).length !== 'number') {
  3490.                 this.handleLiveChatActions66_(arr);
  3491.                 return;
  3492.               }
  3493.               if (mzt > 1e9) mzt = 9;
  3494.               let tid = ++mzt;
  3495.  
  3496.               if (zarr === null) zarr = arr;
  3497.               else Array.prototype.push.apply(zarr, arr);
  3498.               arr = null;
  3499.  
  3500.               await new Promise(requestAnimationFrame);
  3501.  
  3502.               if (tid !== mzt || zarr === null) {
  3503.                 return;
  3504.               }
  3505.  
  3506.               const carr = zarr;
  3507.               zarr = null;
  3508.  
  3509.               await Promise.resolve();
  3510.               this.handleLiveChatActions66_(carr);
  3511.               await Promise.resolve();
  3512.  
  3513.             }
  3514.  
  3515.             mclp.handleLiveChatActions_ = function (arr) {
  3516.  
  3517.               const cnt = this;
  3518.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3519.                 cnt.handleLiveChatActions77_(arr).then(() => {
  3520.                   resolve();
  3521.                 });
  3522.               });
  3523.             }
  3524.             console.log("handleLiveChatActions_", "OK");
  3525.           } else {
  3526.             console.log("handleLiveChatActions_", "NG");
  3527.           }
  3528.  
  3529.           mclp.hasUserJustInteracted11_ = () => {
  3530.             const t = dateNow();
  3531.             return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3532.           }
  3533.  
  3534.           if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3535.  
  3536.             assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3537.  
  3538.             mclp.canScrollToBottom_ = function () {
  3539.               return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3540.             }
  3541.  
  3542.             console.log("canScrollToBottom_", "OK");
  3543.           } else {
  3544.             console.log("canScrollToBottom_", "NG");
  3545.           }
  3546.  
  3547.           if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3548.  
  3549.             mclp.isSmoothScrollEnabled_ = function () {
  3550.               return false;
  3551.             }
  3552.  
  3553.             mclp.maybeResizeScrollContainer_ = function () {
  3554.               //
  3555.             }
  3556.  
  3557.             mclp.refreshOffsetContainerHeight_ = function () {
  3558.               //
  3559.             }
  3560.  
  3561.             mclp.smoothScroll_ = function () {
  3562.               //
  3563.             }
  3564.  
  3565.             mclp.resetSmoothScroll_ = function () {
  3566.               //
  3567.             }
  3568.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3569.           } else {
  3570.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3571.           }
  3572.  
  3573.           if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3574.  
  3575.             mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3576.             mclp.handleAddChatItemAction_ = function (a) {
  3577.               try {
  3578.                 if (a && typeof a === 'object' && !('length' in a)) {
  3579.                   fixLiveChatItem(a.item, null);
  3580.                   console.assert(arguments[0] === a);
  3581.                 }
  3582.               } catch (e) { console.warn(e) }
  3583.               return this.handleAddChatItemAction66_.apply(this, arguments);
  3584.             }
  3585.  
  3586.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3587.           } else {
  3588.  
  3589.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3590.           }
  3591.  
  3592.  
  3593.           if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3594.  
  3595.             mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3596.             mclp.handleReplaceChatItemAction_ = function (a) {
  3597.               try {
  3598.                 if (a && typeof a === 'object' && !('length' in a)) {
  3599.                   fixLiveChatItem(a.replacementItem, null);
  3600.                   console.assert(arguments[0] === a);
  3601.                 }
  3602.               } catch (e) { console.warn(e) }
  3603.               return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3604.             }
  3605.  
  3606.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3607.           } else {
  3608.  
  3609.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3610.           }
  3611.  
  3612.           console.log("[End]");
  3613.           console.groupEnd();
  3614.  
  3615.         });
  3616.  
  3617.  
  3618.         const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3619.  
  3620.           let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3621.  
  3622.           if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3623.  
  3624.             // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3625.             let v = `${attrValue}`;
  3626.             // conside a ticker is 101px width
  3627.             // 1% = 1.01px
  3628.             // 0.2% = 0.202px
  3629.  
  3630.  
  3631.             const ratio1 = (yd.ratio * 100);
  3632.             if (ratio1 > -1) { // avoid NaN
  3633.  
  3634.               // countdownDurationMs
  3635.               // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3636.               // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3637.               // 150000 - 1%    <1% = 1.5s>
  3638.               // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3639.               // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3640.  
  3641.               // 99px * 5% = 4.95px
  3642.  
  3643.               // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3644.  
  3645.  
  3646.               // 1% Duration
  3647.  
  3648.               let ratio2 = ratio1;
  3649.  
  3650.               const ydd = yd.data;
  3651.               if (ydd) {
  3652.  
  3653.                 const d1 = ydd.durationSec;
  3654.                 const d2 = ydd.fullDurationSec;
  3655.  
  3656.                 // @ step timing [min. 0.2%]
  3657.                 let numOfSteps = 500;
  3658.                 if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3659.                   if (d2 > 400) numOfSteps = 500; // 0.2%
  3660.                   else if (d2 > 200) numOfSteps = 200; // 0.5%
  3661.                   else if (d2 > 100) numOfSteps = 100; // 1%
  3662.                   else if (d2 > 50) numOfSteps = 50; // 2%
  3663.                   else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3664.                   else numOfSteps = 20;
  3665.                 }
  3666.                 if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3667.                 if (numOfSteps < 5) numOfSteps = 5;
  3668.  
  3669.                 const rd = numOfSteps / 100.0;
  3670.  
  3671.                 ratio2 = Math.round(ratio2 * rd) / rd;
  3672.  
  3673.                 // ratio2 = Math.round(ratio2 * 5) / 5;
  3674.                 ratio2 = ratio2.toFixed(1);
  3675.                 v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3676.  
  3677.                 if (yd.__style_last__ === v) return;
  3678.                 yd.__style_last__ = v;
  3679.                 // do not consider any delay here.
  3680.                 // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3681.  
  3682.               }
  3683.             }
  3684.  
  3685.             HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3686.  
  3687.  
  3688.           } else {
  3689.             HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3690.           }
  3691.  
  3692.         };
  3693.  
  3694.  
  3695.         const fpTicker = (renderer) => {
  3696.           const cnt = renderer.inst || renderer;
  3697.           assertor(() => typeof (cnt || 0).is === 'string');
  3698.           assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3699.           const container = (cnt.$ || 0).container;
  3700.           if (container) {
  3701.             assertor(() => (container || 0).nodeType === 1);
  3702.             assertor(() => typeof container.setAttribute === 'function');
  3703.             container.setAttribute = tickerContainerSetAttribute;
  3704.           } else {
  3705.             console.warn(`"container" does not exist in ${cnt.is}`);
  3706.           }
  3707.  
  3708.           if (container && ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  3709.             const cProto = cnt.constructor.prototype;
  3710.             if (!('__tickerBackgroundInitialChecked__' in cProto)) {
  3711.               cProto.__tickerBackgroundInitialChecked__ = true;
  3712.               if (runTickerClassName === 'run-ticker') {
  3713.                 container.classList.add('run-ticker-test');
  3714.                 const evaluated = `${window.getComputedStyle(container).background}`;
  3715.                 container.classList.remove('run-ticker-test');
  3716.                 if (evaluated.indexOf('0.') < 4) {
  3717.                   // not fulfilling
  3718.                   // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box 
  3719.                   runTickerClassName = 'run-ticker-forced';
  3720.                   console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3721.                     "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3722.                     "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3723.                   );
  3724.                   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');
  3725.                   console.groupEnd();
  3726.                 }
  3727.               }
  3728.             }
  3729.           }
  3730.         };
  3731.  
  3732.  
  3733.         const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3734.           "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3735.  
  3736.  
  3737.         Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3738.  
  3739.           mightFirstCheckOnYtInit();
  3740.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3741.           console.log("[Begin]");
  3742.  
  3743.           // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3744.           let isMainVideoOngoing = null;
  3745.           let mainVideoLastProgress = null;
  3746.           // << end >>
  3747.  
  3748.           for (const tag of tags) {
  3749.             const dummy = document.createElement(tag);
  3750.  
  3751.             const cProto = getProto(dummy);
  3752.             if (!cProto || !cProto.attached) {
  3753.               console.warn(`proto.attached for ${tag} is unavailable.`);
  3754.               continue;
  3755.             }
  3756.  
  3757.             cProto.attached77 = cProto.attached;
  3758.  
  3759.             cProto.attached = function () {
  3760.               fpTicker(this.hostElement || this);
  3761.               return this.attached77();
  3762.             }
  3763.  
  3764.             for (const elm of document.getElementsByTagName(tag)) {
  3765.               if ((elm || elm.inst).isAttached === true) {
  3766.                 fpTicker(elm);
  3767.               }
  3768.             }
  3769.  
  3770.  
  3771.             let rafHackState = 0;
  3772.  
  3773.             let isTimingFunctionHackable = false;
  3774.  
  3775.             let urt = 0;
  3776.  
  3777.             if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3778.  
  3779.               // console.log('startCountdown', typeof cProto.startCountdown)
  3780.               // console.log('updateTimeout', typeof cProto.updateTimeout)
  3781.               // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3782.  
  3783.               isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3784.  
  3785.             } else {
  3786.               console.log(`Skip Timing Function Modification for ${tag}`);
  3787.               continue;
  3788.             }
  3789.  
  3790.  
  3791.             if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3792.  
  3793.               // cancelable - this.rafId < isAnimationPausedChanged >
  3794.               rafHackState = 1;
  3795.  
  3796.               if (isTimingFunctionHackable) {
  3797.                 rafHackState = 2;
  3798.  
  3799.               } else {
  3800.                 rafHackState = 4;
  3801.               }
  3802.  
  3803.             }
  3804.  
  3805.             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';
  3806.  
  3807.             const doRAFHack = rafHackState === 2;
  3808.  
  3809.             cProto._throwOut = function () {
  3810.               this._r782 = 1;
  3811.               Promise.resolve().then(() => {
  3812.                 this.detached();
  3813.                 this.data = null;
  3814.                 if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  3815.                 if (this.__dataEnabled === true) this.__dataEnabled = false;
  3816.                 if (this.__dataReady === true) this.__dataReady = false;
  3817.                 const hm = this.hostElement || this;
  3818.                 if (hm.parentNode) hm.remove();
  3819.                 if (hm.firstChild) hm.textContent = '';
  3820.               }).catch(e => {
  3821.                 console.warn(e);
  3822.               });
  3823.             };
  3824.  
  3825.             cProto._makeAnimator = doAnimator ? function () {
  3826.               if (this._r782) return;
  3827.               // if (!this.isAttached) return;
  3828.               if (!this._runnerAE) {
  3829.                 const aElement = (this.$ || 0).container;
  3830.                 if (!aElement) return console.warn("this.$.container is undefined");
  3831.                 const da = this.data;
  3832.                 if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  3833.                 const c1 = this.colorFromDecimal(da.startBackgroundColor);
  3834.                 const c2 = this.colorFromDecimal(da.endBackgroundColor);
  3835.                 if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  3836.                 aElement.style.setProperty('--ticker-c1', c1);
  3837.                 aElement.style.setProperty('--ticker-c2', c2);
  3838.                 aElement.classList.add(runTickerClassName);
  3839.                 const p = (this.countdownMs / this.countdownDurationMs) * 100;
  3840.                 // this._aeStartV = this.countdownMs;
  3841.                 // this._aeStartT = this.countdownDurationMs;
  3842.                 if (!(p >= 0 && p <= 100)) {
  3843.                   console.warn('incorrect time ratio', p);
  3844.                 } else {
  3845.                   /*
  3846.                   const u0 = p.toFixed(4) + '%';
  3847.                   this._runnerAE = animate.call(aElement,
  3848.                     [
  3849.                       { '--ticker-rtime': u0 },
  3850.                       { '--ticker-rtime': '0%' }
  3851.                     ]
  3852.                     ,
  3853.                     {
  3854.                       fill: "forwards",
  3855.                       duration: this.countdownMs,
  3856.                       easing: "linear"
  3857.                     }
  3858.                   );
  3859.                   */
  3860.  
  3861.                   let timingFn = 'linear';
  3862.  
  3863.                   const totalDuration = this.countdownDurationMs;
  3864.  
  3865.                   if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF === 'steps') {
  3866.  
  3867.                     // @ step timing [min. 0.2%]
  3868.                     let stepInterval = 0.2; // unit: %
  3869.                     if (totalDuration > 400000) stepInterval = 0.2;
  3870.                     else if (totalDuration > 200000) stepInterval = 0.5;
  3871.                     else if (totalDuration > 100000) stepInterval = 1;
  3872.                     else if (totalDuration > 50000) stepInterval = 2;
  3873.                     else if (totalDuration > 25000) stepInterval = 5;
  3874.                     else stepInterval = 5;
  3875.  
  3876.                     let numOfSteps = Math.round(100 / stepInterval);
  3877.  
  3878.                     if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3879.                     if (numOfSteps < 5) numOfSteps = 5;
  3880.  
  3881.                     timingFn = `steps(${numOfSteps}, end)`;
  3882.  
  3883.                   }
  3884.  
  3885.  
  3886.  
  3887.                   this._runnerAE = animate.call(aElement,
  3888.                     [
  3889.                       { '--ticker-rtime': '100%' },
  3890.                       { '--ticker-rtime': '0%' }
  3891.                     ]
  3892.                     ,
  3893.                     {
  3894.                       fill: "forwards",
  3895.                       duration: totalDuration,
  3896.                       easing: timingFn
  3897.                     }
  3898.                   );
  3899.  
  3900.                   this._runnerAE.onfinish = () => {
  3901.                     if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  3902.                       this._aeFinished();
  3903.                     }
  3904.                   }
  3905.  
  3906.                   let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  3907.                   if (bq >= 0 && bq <= totalDuration) {
  3908.  
  3909.                     this._runnerAE.currentTime = bq
  3910.                   } else {
  3911.                     console.warn('Error on setting _runnerAE.currentTime!');
  3912.                   }
  3913.  
  3914.  
  3915.                   aeConstructor = this._runnerAE.constructor; // constructor is from iframe
  3916.                   return this._runnerAE;
  3917.                 }
  3918.               } else {
  3919.                 if (!aeConstructor) return console.warn('aeConstructor is undefined');
  3920.                 // assume just time update
  3921.                 const ae = this._runnerAE;
  3922.                 if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  3923.                 if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  3924.                 let p = (this.countdownMs / this.countdownDurationMs) * 100;
  3925.                 if (!(p >= 0 && p <= 100)) {
  3926.                   console.warn('incorrect time ratio', p);
  3927.                 } else {
  3928.                   // let u0 = p.toFixed(4) + '%'
  3929.                   /*
  3930.                   ae.effect.setKeyframes([
  3931.                     { '--ticker-rtime': u0 },
  3932.                     { '--ticker-rtime': '0%' }
  3933.                   ]);
  3934.                   ae.effect.updateTiming({ duration: this.countdownMs });
  3935.                   */
  3936.                   // ae.currentTime = 0;
  3937.  
  3938.  
  3939.  
  3940.                   let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  3941.                   if (bq >= 0 && bq <= this.countdownDurationMs) {
  3942.  
  3943.                     this._runnerAE.currentTime = bq
  3944.                   } else {
  3945.                     console.warn('Error on setting _runnerAE.currentTime!');
  3946.                   }
  3947.  
  3948.  
  3949.                   ae.play();
  3950.                   return ae;
  3951.                 }
  3952.               }
  3953.             } : null;
  3954.  
  3955.             cProto._aeFinished = doAnimator ? function () {
  3956.  
  3957.               if (this._r782) return;
  3958.  
  3959.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  3960.                 this._throwOut();
  3961.                 return;
  3962.               }
  3963.  
  3964.               if (doAnimator) {
  3965.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  3966.  
  3967.                 let lc = window.performance.now();
  3968.                 this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  3969.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  3970.                 this.lastCountdownTimeMs = lc;
  3971.                 if (this.countdownMs > 10) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs); // just warning.
  3972.  
  3973.                 this.countdownMs = 0;
  3974.                 (this.lastCountdownTimeMs = null,
  3975.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  3976.                     this.slideDown()));
  3977.  
  3978.  
  3979.               } else {
  3980.                 console.warn('unexpected issue')
  3981.               }
  3982.             } : null;
  3983.  
  3984.  
  3985.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  3986.  
  3987.               if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  3988.                 urt++;
  3989.                 assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  3990.                 cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  3991.                 cProto.handlePauseReplay = function () {
  3992.                   if (this.isAttached) {
  3993.  
  3994.                     if (pairForPauseResumeM === 0) {
  3995.                       pairForPauseResume++;
  3996.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  3997.                     }
  3998.                     // console.log('handlePauseReplay');
  3999.                     // console.log('handlePauseReplay', pairForPauseResume);
  4000.                     const r = this.handlePauseReplay66.apply(this, arguments);
  4001.                     isMainVideoOngoing = false;
  4002.                     return r;
  4003.                   }
  4004.                 };
  4005.               } else {
  4006.                 console.log('Error for setting cProto.handlePauseReplay', tag)
  4007.               }
  4008.  
  4009.               if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4010.                 urt++;
  4011.                 assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4012.                 cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4013.                 cProto.handleResumeReplay = function () {
  4014.                   if (this.isAttached) {
  4015.  
  4016.                     if (pairForPauseResumeM === 0) {
  4017.                       pairForPauseResume++;
  4018.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4019.                     }
  4020.                     // console.log('handleResumeReplay');
  4021.                     // console.log('handleResumeReplay', pairForPauseResume);
  4022.                     const r = this.handleResumeReplay66.apply(this, arguments);
  4023.                     isMainVideoOngoing = true;
  4024.                     return r;
  4025.  
  4026.                   }
  4027.                 };
  4028.               } else {
  4029.                 console.log('Error for setting cProto.handleResumeReplay', tag)
  4030.               }
  4031.  
  4032.               if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4033.                 urt++;
  4034.                 assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4035.                 cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4036.                 cProto.handleReplayProgress = function (a) {
  4037.                   if (this.isAttached) {
  4038.                     const p = mainVideoLastProgress;
  4039.                     mainVideoLastProgress = a;
  4040.                     if (isMainVideoOngoing === false) { // ignore isMainVideoOngoing === null ?
  4041.                       const d = a - p;
  4042.                       if (d > 0 && d < 0.28) isMainVideoOngoing = true; // timeupdate
  4043.                       // 0.28 is due to
  4044.                       //    - most browsers will fire the timeupdate event between 4 to 60 times per second
  4045.                       //    - i.e. timeupdate roughly every 15-250 milliseconds
  4046.                     }
  4047.                     let promiseResult = null;
  4048.                     if (this.isAnimationPaused) {
  4049.                       // unstable state for isMainVideoOngoing; delay required
  4050.                       // all the tickers' handleReplayProgress are executed in the same microtask
  4051.                       // execute after result returned
  4052.                       const lz1 = pairForPauseResume;
  4053.                       Promise.resolve().then(() => {
  4054.                         return promiseResult
  4055.                       }).then(() => {
  4056.  
  4057.  
  4058.                         if (isMainVideoOngoing === true && this.isAnimationPaused) {
  4059.                           const lz2 = pairForPauseResume;
  4060.                           // console.log( 10044000, lz1, lz2 , mainVideoLastProgress - a, isMainVideoOngoing  )
  4061.                           if (lz1 === lz2 && mainVideoLastProgress !== null && mainVideoLastProgress - a >= -1e-5) this.isAnimationPaused = false; // trigger isAnimationPausedChanged
  4062.                         }
  4063.  
  4064.                       });
  4065.                     }
  4066.  
  4067.                     const lq1 = pairForPauseResume;
  4068.                     promiseResult = Promise.resolve().then(() => {
  4069.                       const lq2 = pairForPauseResume;
  4070.  
  4071.                       if (lq1 === lq2) {
  4072.                         this.handleReplayProgress66(a);
  4073.                       }
  4074.  
  4075.  
  4076.                     })
  4077.  
  4078.                   }
  4079.                 };
  4080.               } else {
  4081.                 console.log('Error for setting cProto.handleReplayProgress', tag)
  4082.               }
  4083.  
  4084.             }
  4085.  
  4086.             const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4087.  
  4088.             cProto.startCountdown = (doRAFHack || doAnimator) ? function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4089.  
  4090.               // a.durationSec [s] => countdownMs [ms]
  4091.               // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4092.               // lastCountdownTimeMs => raf ongoing
  4093.               // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4094.  
  4095.               if (this._r782) return;
  4096.  
  4097.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4098.                 this._throwOut();
  4099.                 return;
  4100.               }
  4101.  
  4102.               if (doAnimator) {
  4103.                 b = void 0 === b ? 0 : b;
  4104.                 if (void 0 !== a) {
  4105.                   this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4106.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4107.                   if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4108.                     this.lastCountdownTimeMs = performance.now()
  4109.                     this.rafId = 1
  4110.                     if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4111.                     this.detlaSincePausedSecs = 0;
  4112.                     const ae = this._makeAnimator();
  4113.                     if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4114.  
  4115.                     // console.log(539, isMainVideoOngoing)
  4116.                     if (this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4117.                       // << This is mainly for [PlayBack Replay] backwards >>
  4118.                       // fix the case when the main video is paused but due to seeking the tickers are added
  4119.                       // play first then pause immediately to allow the visual effect of initial state
  4120.                       // don't forget to set the "playerProgressSec"
  4121.                       // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4122.                       this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4123.                       this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4124.                       this.detlaSincePausedSecs = 0;
  4125.                       this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4126.                     }
  4127.                   }
  4128.                 }
  4129.               } else {
  4130.                 // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4131.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4132.                 b = void 0 === b ? 0 : b;
  4133.                 void 0 !== a && (this.countdownMs = 1E3 * a,
  4134.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4135.                   this.ratio = 1,
  4136.                   this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  4137.                     this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4138.               }
  4139.  
  4140.             } : cProto.startCountdown;
  4141.  
  4142.             cProto.updateTimeout = (doRAFHack || doAnimator) ? function (a) {
  4143.  
  4144.               if (this._r782) return;
  4145.  
  4146.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4147.                 this._throwOut();
  4148.                 return;
  4149.               }
  4150.  
  4151.               if (doAnimator) {
  4152.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4153.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4154.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4155.                 if (this.isAttached && this.countdownMs) {
  4156.                   this.lastCountdownTimeMs = a
  4157.                   const ae = this._makeAnimator(); // request raf
  4158.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4159.                 } else {
  4160.                   (this.lastCountdownTimeMs = null,
  4161.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4162.                       this.slideDown()));
  4163.                 }
  4164.               } else {
  4165.                 // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4166.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4167.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4168.                 this.ratio = this.countdownMs / this.countdownDurationMs;
  4169.                 this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4170.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  4171.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4172.                       this.slideDown()))
  4173.               }
  4174.  
  4175.             } : cProto.updateTimeout;
  4176.  
  4177.             // let ez = 0;
  4178.             cProto.isAnimationPausedChanged = (doRAFHack || doAnimator) ? function (a, b) {
  4179.  
  4180.               if (this._r782) return;
  4181.  
  4182.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4183.                 this._throwOut();
  4184.                 return;
  4185.               }
  4186.               let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4187.               this._forceNoDetlaSincePausedSecs783 = 0;
  4188.  
  4189.               Promise.resolve().then(() => {
  4190.  
  4191.                 if (doAnimator) {
  4192.  
  4193.                   const playState = (this._runnerAE || 0).playState;
  4194.                   if (a && playState === 'running') {
  4195.  
  4196.                   } else if (!a && playState !== 'running' && b) {
  4197.  
  4198.                   } else {
  4199.                     return;
  4200.                   }
  4201.                 }
  4202.  
  4203.                 // if (Math.abs(this.detlaSincePausedSecs) < 0.01) this.detlaSincePausedSecs = 0;
  4204.                 if (doAnimator) {
  4205.                   const pu = () => { // running -> pause
  4206.                     this._runnerAE.pause()
  4207.                     let lc = window.performance.now();
  4208.                     this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4209.                     if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4210.                     this.lastCountdownTimeMs = lc;
  4211.                   };
  4212.                   const wa = () => { // pause -> running
  4213.                     if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4214.                     a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4215.                     this.detlaSincePausedSecs = 0;
  4216.                     this.updateTimeout(a);
  4217.                     this.lastCountdownTimeMs = window.performance.now();
  4218.                   };
  4219.                   a ? (this._runnerAE && pu()) : (!a && b && wa());
  4220.                 } else {
  4221.                   // ez++;
  4222.                   // if(ez> 1e9) ez=9;
  4223.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4224.                   a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4225.                     this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4226.                       this.detlaSincePausedSecs = 0),
  4227.                     this.boundUpdateTimeout37_(a),
  4228.                     this.lastCountdownTimeMs = window.performance.now())
  4229.                 }
  4230.  
  4231.               }).catch(e => {
  4232.                 console.log(e);
  4233.               });
  4234.  
  4235.  
  4236.  
  4237.             } : cProto.isAnimationPausedChanged;
  4238.  
  4239.  
  4240.             if (doAnimator) {
  4241.  
  4242.               assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4243.  
  4244.               let dummyValueForStyleReturn = null;
  4245.  
  4246.               cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4247.               cProto.computeContainerStyle = function (a, b) {
  4248.  
  4249.                 if (this._r782) return;
  4250.  
  4251.                 if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4252.                   this._throwOut();
  4253.                   return;
  4254.                 }
  4255.  
  4256.                 const fullDurationSec = a ? a.fullDurationSec : 0;
  4257.                 if (fullDurationSec > 0 && typeof b === 'number') {
  4258.  
  4259.                   // usually zero
  4260.  
  4261.                   // let currentDuationSrc = b * fullDurationSec; // a.durationSec
  4262.  
  4263.                   // console.log(231, fullDurationSec, b, currentDuationSrc, a.durationSec);
  4264.  
  4265.                   /*
  4266.                   if (a.mdsz && typeof a.mdst) return a.mdst;
  4267.                   a.mdsz = 1;
  4268.  
  4269.  
  4270.  
  4271.                   let c1 = this.colorFromDecimal(a.startBackgroundColor);
  4272.                   let c2 = this.colorFromDecimal(a.endBackgroundColor);
  4273.  
  4274.                   let ratio = currentDuationSrc / fullDurationSec;
  4275.  
  4276.                   let m = (ratio * 100).toFixed(1);
  4277.  
  4278.  
  4279.                   let s = `--background:linear-gradient(90deg, ${c1},${c1} ${m}%,${c2} ${m}%,${c2});`
  4280.                   let ro = {
  4281.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4282.                     "implementsGoogStringTypedString": true
  4283.                   };
  4284.  
  4285.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4286.  
  4287.                   a.mdst = s;
  4288.  
  4289.                   return ro;
  4290.                   */
  4291.                 }
  4292.  
  4293.  
  4294.  
  4295.                 // return this.computeContainerStyle66.apply(this, arguments);
  4296.  
  4297.                 if (dummyValueForStyleReturn === null) {
  4298.  
  4299.                   let s = `--nx:82;`
  4300.                   let ro = {
  4301.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4302.                     "implementsGoogStringTypedString": true
  4303.                   };
  4304.  
  4305.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4306.  
  4307.  
  4308.                   dummyValueForStyleReturn = ro;
  4309.  
  4310.  
  4311.                 }
  4312.  
  4313.  
  4314.                 return dummyValueForStyleReturn;
  4315.  
  4316.  
  4317.               }
  4318.  
  4319.             }
  4320.  
  4321.             if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  4322.               console.log('ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF', tag, doAnimator ? 'OK' : 'NG');
  4323.             }
  4324.  
  4325.             if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4326.               console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4327.             }
  4328.  
  4329.           }
  4330.           console.log("[End]");
  4331.           console.groupEnd();
  4332.  
  4333.  
  4334.         });
  4335.  
  4336.  
  4337.         if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4338.  
  4339.  
  4340.           customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4341.  
  4342.             mightFirstCheckOnYtInit();
  4343.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4344.             console.log("[Begin]");
  4345.             (() => {
  4346.  
  4347.               const tag = "yt-live-chat-message-input-renderer"
  4348.               const dummy = document.createElement(tag);
  4349.  
  4350.               const cProto = getProto(dummy);
  4351.               if (!cProto || !cProto.attached) {
  4352.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4353.                 return;
  4354.               }
  4355.  
  4356.               let doHack = false;
  4357.               if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4358.  
  4359.                 // not cancellable
  4360.                 console.log('handleTimeout', typeof cProto.handleTimeout)
  4361.                 console.log('updateTimeout', typeof cProto.updateTimeout)
  4362.  
  4363.                 doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4364.  
  4365.               }
  4366.  
  4367.               if (doHack) {
  4368.  
  4369.                 cProto.handleTimeout = function (a) {
  4370.                   console.log('cProto.handleTimeout', tag)
  4371.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4372.                   this.timeoutDurationMs = this.timeoutMs = a;
  4373.                   this.countdownRatio = 1;
  4374.                   0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4375.                 };
  4376.                 cProto.updateTimeout = function (a) {
  4377.                   console.log('cProto.updateTimeout', tag)
  4378.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4379.                   this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4380.                     this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4381.                   this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4382.                     rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4383.                 };
  4384.  
  4385.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4386.               } else {
  4387.  
  4388.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4389.               }
  4390.  
  4391.             })();
  4392.  
  4393.             console.log("[End]");
  4394.  
  4395.             console.groupEnd();
  4396.  
  4397.  
  4398.           })
  4399.  
  4400.  
  4401.         }
  4402.  
  4403.         if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4404.  
  4405.  
  4406.           customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4407.  
  4408.             mightFirstCheckOnYtInit();
  4409.             groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4410.             console.log("[Begin]");
  4411.             (() => {
  4412.  
  4413.               const tag = "yt-emoji-picker-renderer"
  4414.               const dummy = document.createElement(tag);
  4415.  
  4416.               const cProto = getProto(dummy);
  4417.               if (!cProto || !cProto.attached) {
  4418.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4419.                 return;
  4420.               }
  4421.  
  4422.               let doHack = false;
  4423.               if (typeof cProto.animateScroll_ === 'function') {
  4424.  
  4425.                 // not cancellable
  4426.                 console.log('animateScroll_', typeof cProto.animateScroll_)
  4427.  
  4428.                 doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4429.  
  4430.               }
  4431.  
  4432.               if (doHack) {
  4433.  
  4434.                 const querySelector = HTMLElement.prototype.querySelector;
  4435.                 const U = (element) => ({
  4436.                   querySelector: (selector) => querySelector.call(element, selector)
  4437.                 });
  4438.  
  4439.                 cProto.animateScroll_ = function (a) {
  4440.                   // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4441.                   if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4442.                   this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4443.                   a -= this.lastAnimationTime_;
  4444.                   200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4445.                     rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4446.                       this.animationEnd_ = this.animationStart_ = null,
  4447.                       this.lastAnimationTime_ = 0);
  4448.                   this.updateButtons_()
  4449.                 }
  4450.  
  4451.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  4452.               } else {
  4453.  
  4454.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  4455.               }
  4456.  
  4457.             })();
  4458.  
  4459.             console.log("[End]");
  4460.  
  4461.             console.groupEnd();
  4462.           });
  4463.         }
  4464.  
  4465.         if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  4466.  
  4467.  
  4468.           customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  4469.  
  4470.             mightFirstCheckOnYtInit();
  4471.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  4472.             console.log("[Begin]");
  4473.             (() => {
  4474.  
  4475.               const tag = "yt-live-chat-docked-message"
  4476.               const dummy = document.createElement(tag);
  4477.  
  4478.               const cProto = getProto(dummy);
  4479.               if (!cProto || !cProto.attached) {
  4480.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4481.                 return;
  4482.               }
  4483.  
  4484.               let doHack = false;
  4485.               if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  4486.  
  4487.                 // cancelable - this.intersectRAF <detached>
  4488.                 // yt-live-chat-docked-message
  4489.                 // boundCheckIntersections <-> checkIntersections
  4490.                 // onDockableMessagesChanged
  4491.                 //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  4492.  
  4493.                 console.log('detached', typeof cProto.detached)
  4494.                 console.log('checkIntersections', typeof cProto.checkIntersections)
  4495.                 console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  4496.  
  4497.                 doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  4498.  
  4499.               }
  4500.  
  4501.               if (doHack) {
  4502.  
  4503.                 cProto.checkIntersections = function () {
  4504.                   // console.log('cProto.checkIntersections', tag)
  4505.                   if (this.dockableMessages.length) {
  4506.                     this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  4507.                     let a = this.dockableMessages[0]
  4508.                       , b = this.hostElement.getBoundingClientRect();
  4509.                     a = a.getBoundingClientRect();
  4510.                     let c = a.top - b.top
  4511.                       , d = 8 >= c;
  4512.                     c = 8 >= c - this.hostElement.clientHeight;
  4513.                     if (d) {
  4514.                       let e;
  4515.                       for (; d;) {
  4516.                         e = this.dockableMessages.shift();
  4517.                         d = this.dockableMessages[0];
  4518.                         if (!d)
  4519.                           break;
  4520.                         d = d.getBoundingClientRect();
  4521.                         c = d.top - b.top;
  4522.                         let f = 8 >= c;
  4523.                         if (8 >= c - a.height)
  4524.                           if (f)
  4525.                             a = d;
  4526.                           else
  4527.                             return;
  4528.                         d = f
  4529.                       }
  4530.                       this.dock(e)
  4531.                     } else
  4532.                       c && this.dockedItem && this.clear()
  4533.                   } else
  4534.                     this.intersectRAF = 0
  4535.                 }
  4536.  
  4537.                 cProto.onDockableMessagesChanged = function () {
  4538.                   // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  4539.                   this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  4540.                 }
  4541.  
  4542.                 cProto.detached = function () {
  4543.                   this.intersectRAF && rafHub.cancel(this.intersectRAF)
  4544.                 }
  4545.  
  4546.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  4547.               } else {
  4548.  
  4549.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  4550.               }
  4551.  
  4552.             })();
  4553.  
  4554.             console.log("[End]");
  4555.  
  4556.             console.groupEnd();
  4557.  
  4558.           });
  4559.  
  4560.         }
  4561.  
  4562.         if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  4563.  
  4564.  
  4565.           customElements.whenDefined("yt-img-shadow").then(() => {
  4566.  
  4567.             mightFirstCheckOnYtInit();
  4568.             groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  4569.             console.log("[Begin]");
  4570.             (() => {
  4571.  
  4572.               const tag = "yt-img-shadow"
  4573.               const dummy = document.createElement(tag);
  4574.  
  4575.               const cProto = getProto(dummy);
  4576.               if (!cProto || !cProto.attached) {
  4577.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4578.                 return;
  4579.               }
  4580.  
  4581.               if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  4582.  
  4583.                 cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  4584.                 cProto.thumbnailChanged_ = function (a) {
  4585.  
  4586.                   if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  4587.                   if (!this.oldThumbnail_ && !this.thumbnail) return;
  4588.  
  4589.                   return this.thumbnailChanged66_.apply(this, arguments)
  4590.  
  4591.                 }
  4592.                 console.log("cProto.thumbnailChanged_ - OK");
  4593.  
  4594.               } else {
  4595.                 console.log("cProto.thumbnailChanged_ - NG");
  4596.  
  4597.               }
  4598.               if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  4599.  
  4600.                 cProto.setSrc66_ = cProto.setSrc_;
  4601.                 cProto.setSrc_ = function (a) {
  4602.                   if ((((this || 0).$ || 0).img || 0).src === a) return;
  4603.                   return this.setSrc66_.apply(this, arguments)
  4604.                 }
  4605.  
  4606.                 console.log("cProto.setSrc_ - OK");
  4607.               } else {
  4608.  
  4609.                 console.log("cProto.setSrc_ - NG");
  4610.               }
  4611.  
  4612.             })();
  4613.  
  4614.             console.log("[End]");
  4615.  
  4616.             console.groupEnd();
  4617.  
  4618.           });
  4619.  
  4620.         }
  4621.  
  4622.         if(FIX_THUMBNAIL_DATACHANGED){
  4623.  
  4624.  
  4625.  
  4626.           customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  4627.  
  4628.             mightFirstCheckOnYtInit();
  4629.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  4630.             console.log("[Begin]");
  4631.             (() => {
  4632.  
  4633.               const tag = "yt-live-chat-author-badge-renderer"
  4634.               const dummy = document.createElement(tag);
  4635.  
  4636.               const cProto = getProto(dummy);
  4637.               if (!cProto || !cProto.attached) {
  4638.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4639.                 return;
  4640.               }
  4641.  
  4642.  
  4643.               if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  4644.  
  4645.  
  4646.  
  4647.                 cProto.dataChanged86 = cProto.dataChanged;
  4648.                 cProto.dataChanged = function(a){
  4649.  
  4650. /*
  4651.  
  4652.         for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  4653.             b.removeChild(b.firstChild);
  4654.         if (a)
  4655.             if (a.icon) {
  4656.                 var c = document.createElement("yt-icon");
  4657.                 "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  4658.                 c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  4659.                 b.appendChild(c)
  4660.             } else if (a.customThumbnail) {
  4661.                 c = document.createElement("img");
  4662.                 var d;
  4663.                 (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4664.                 b.appendChild(c),
  4665.                 c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  4666.             }
  4667.  
  4668.             */
  4669.  
  4670.                   const image = ((this||0).$||0).image
  4671.                   if (image && a && image.firstElementChild) {
  4672.                     let exisiting = image.firstElementChild;
  4673.                     if (exisiting === image.lastElementChild) {
  4674.  
  4675.  
  4676.                       if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  4677.  
  4678.                         let c = exisiting;
  4679.                         if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  4680.                           if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  4681.                           if (c.defaultToFilled !== true) c.defaultToFilled = true;
  4682.                         } else {
  4683.                           let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  4684.                           if (c.icon !== p) c.icon = p;
  4685.                           if (c.defaultToFilled !== false) c.defaultToFilled = false;
  4686.                         }
  4687.                         return;
  4688.  
  4689.  
  4690.                       } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  4691.  
  4692.                         let c = exisiting;
  4693.                         if(a.customThumbnail.thumbnails.map(e=>e.url).includes(c.src)){
  4694.  
  4695.                           c.setAttribute("alt", this.hostElement.ariaLabel || "");
  4696.                           return;
  4697.                         }
  4698.                         /*
  4699.  
  4700.                         var d;
  4701.                         (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4702.  
  4703.  
  4704.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  4705.                           */
  4706.                       }
  4707.  
  4708.  
  4709.                     }
  4710.                   }
  4711.                   return this.dataChanged86.apply(this,arguments)
  4712.  
  4713.                 }
  4714.                 console.log("cProto.dataChanged - OK");
  4715.  
  4716.               }else{
  4717.                 assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  4718.                 console.log("cProto.dataChanged - NG");
  4719.  
  4720.               }
  4721.  
  4722.             })();
  4723.  
  4724.             console.log("[End]");
  4725.  
  4726.             console.groupEnd();
  4727.  
  4728.           });
  4729.  
  4730.  
  4731.         }
  4732.  
  4733.  
  4734.       }
  4735.  
  4736.       promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  4737.  
  4738.  
  4739.     })();
  4740.  
  4741.  
  4742.   });
  4743.  
  4744. })({ IntersectionObserver });