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YouTube 超快聊天

YouTube直播聊天的终极性能提升

当前为 2023-08-20 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.25.1
  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 = false;      // 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.   const FIX_TOOLTIP_DISPLAY = true;
  119.   const FIX_CLICKING_MESSAGE_MENU_DISPLAY = true;
  120.  
  121.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  122.   /*
  123.  
  124.     ### Time Approach
  125.  
  126.     // all below values can make the time interval > 250ms
  127.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  128.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  129.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  130.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  131.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  132.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  133.  
  134.     ### Pixel Check
  135.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  136.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  137.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  138.  
  139.     ### Example - totalDuration = 280000
  140.     totalDuration 280000
  141.     stepInterval 0.5
  142.     numOfSteps = Math.round(100 / stepInterval) = 200
  143.     time interval = 280000 / 200 = 1400ms <acceptable>
  144.  
  145.     ### Example - totalDuration = 18000
  146.     totalDuration 18000
  147.     stepInterval 5
  148.     numOfSteps = Math.round(100 / stepInterval) = 20
  149.     time interval = 18000 / 20 = 900ms <acceptable>
  150.  
  151.     ### Example - totalDuration = 5000
  152.     totalDuration 5000
  153.     stepInterval 5
  154.     numOfSteps = Math.round(100 / stepInterval) = 20
  155.     time interval = 5000 / 20 = 250ms <threshold value>
  156.  
  157.     ### Example - totalDuration = 3600
  158.     totalDuration 3600
  159.     stepInterval 5
  160.     numOfSteps = Math.round(100 / stepInterval) = 20
  161.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  162.  
  163.   */
  164.  
  165.   // =======================================================================================================
  166.  
  167.   // AUTOMAICALLY DETERMINED
  168.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  169.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  170.   let runTickerClassName = 'run-ticker';
  171.  
  172.   // image sizing code
  173.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  174.  
  175.  
  176.   //   function KC(a, b, c, d) {
  177.   //     d = void 0 === d ? "width" : d;
  178.   //     if (!a || !a.length)
  179.   //         return null;
  180.   //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  181.   //         var e = window.devicePixelRatio;
  182.   //         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"));
  183.   //         HC = e
  184.   //     } else
  185.   //         HC || (HC = window.devicePixelRatio);
  186.   //     e = HC;
  187.   //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  188.   //     if (z("kevlar_tuner_min_thumbnail_quality"))
  189.   //         return a[0].url || null;
  190.   //     e = a.length;
  191.   //     if (z("kevlar_tuner_max_thumbnail_quality"))
  192.   //         return a[e - 1].url || null;
  193.   //     if (c)
  194.   //         for (var h = 0; h < e; h++)
  195.   //             if (0 <= a[h].url.indexOf(c))
  196.   //                 return a[h].url || null;
  197.   //     for (c = 0; c < e; c++)
  198.   //         if (a[c][d] >= b)
  199.   //             return a[c].url || null;
  200.   //     for (b = e - 1; 0 < b; b--)
  201.   //         if (a[b][d])
  202.   //             return a[b].url || null;
  203.   //     return a[0].url || null
  204.   // }
  205.  
  206.   const { IntersectionObserver } = __CONTEXT__;
  207.  
  208.   /** @type {globalThis.PromiseConstructor} */
  209.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  210.  
  211.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.")
  212.  
  213.   // necessity of cssText3_smooth_transform_position to be checked.
  214.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  215.  
  216.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  217.         position: static !important;
  218.     }
  219.  
  220.   `: '';
  221.  
  222.   // fallback if dummy style fn fails
  223.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  224.  
  225.     /* optional */
  226.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  227.         height: auto !important;
  228.         min-height: unset !important;
  229.     }
  230.  
  231.     #items.style-scope.yt-live-chat-item-list-renderer {
  232.         transform: translateY(0px) !important;
  233.     }
  234.  
  235.     /* optional */
  236.  
  237.   `: '';
  238.  
  239.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  240.  
  241.     /* ------------------------------------------------------------------------------------------------------------- */
  242.  
  243.     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 {
  244.         contain: layout style;
  245.     }
  246.  
  247.     #items.style-scope.yt-live-chat-item-list-renderer {
  248.         contain: layout paint style;
  249.     }
  250.  
  251.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  252.         contain: style;
  253.     }
  254.  
  255.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  256.         contain: size style;
  257.     }
  258.  
  259.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  260.         contain: size layout paint style;
  261.     }
  262.  
  263.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  264.         contain: layout paint style;
  265.     }
  266.  
  267.     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 {
  268.         contain: layout style;
  269.     }
  270.  
  271.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  272.         contain: layout paint style;
  273.     }
  274.  
  275.     /* ------------------------------------------------------------------------------------------------------------- */
  276.  
  277.   ` : '';
  278.  
  279.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  280.  
  281.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  282.         top: 4px;
  283.         transition-property: top;
  284.         bottom: unset;
  285.     }
  286.  
  287.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  288.         top: -42px;
  289.     }
  290.  
  291.   `: '';
  292.  
  293.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  294.  
  295.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  296.         contain: layout style;
  297.     }
  298.  
  299.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  300.         overflow: visible;
  301.     }
  302.  
  303.   `: '';
  304.  
  305.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  306.  
  307.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  308.         --yt-live-chat-action-panel-top-border: none;
  309.     }
  310.  
  311.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  312.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  313.     }
  314.  
  315.     html #panel-pages.yt-live-chat-renderer {
  316.         border-top: 0;
  317.         border-bottom: 0;
  318.     }
  319.  
  320.   `: '';
  321.  
  322.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  323.  
  324.     img,
  325.     yt-img-shadow[height][width],
  326.     yt-img-shadow {
  327.         content-visibility: visible !important;
  328.     }
  329.  
  330.   `  : '';
  331.  
  332.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  333.  
  334.     /* remove YouTube constant will-change */
  335.     /* constant value will slow down the performance; default auto */
  336.  
  337.     /* www-player.css */
  338.     html .ytp-contextmenu,
  339.     html .ytp-settings-menu {
  340.         will-change: unset;
  341.     }
  342.  
  343.     /* frequently matched elements */
  344.     html .fill.yt-interaction,
  345.     html .stroke.yt-interaction,
  346.     html .yt-spec-touch-feedback-shape__fill,
  347.     html .yt-spec-touch-feedback-shape__stroke {
  348.         will-change: unset;
  349.     }
  350.  
  351.     /* live_chat_polymer.js */
  352.     /*
  353.     html .toggle-button.tp-yt-paper-toggle-button,
  354.     html #primaryProgress.tp-yt-paper-progress,
  355.     html #secondaryProgress.tp-yt-paper-progress,
  356.     html #onRadio.tp-yt-paper-radio-button,
  357.     html .fill.yt-interaction,
  358.     html .stroke.yt-interaction,
  359.     html .yt-spec-touch-feedback-shape__fill,
  360.     html .yt-spec-touch-feedback-shape__stroke {
  361.         will-change: unset;
  362.     }
  363.     */
  364.  
  365.     /* desktop_polymer_enable_wil_icons.js */
  366.     /* html .fill.yt-interaction,
  367.     html .stroke.yt-interaction, */
  368.     html tp-yt-app-header::before,
  369.     html tp-yt-iron-list,
  370.     html #items.tp-yt-iron-list > *,
  371.     html #onRadio.tp-yt-paper-radio-button,
  372.     html .toggle-button.tp-yt-paper-toggle-button,
  373.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  374.     html #items.ytd-post-multi-image-renderer,
  375.     html #items.ytd-horizontal-card-list-renderer,
  376.     html #items.yt-horizontal-list-renderer,
  377.     html #left-arrow.yt-horizontal-list-renderer,
  378.     html #right-arrow.yt-horizontal-list-renderer,
  379.     html #items.ytd-video-description-infocards-section-renderer,
  380.     html #items.ytd-video-description-music-section-renderer,
  381.     html #chips.ytd-feed-filter-chip-bar-renderer,
  382.     html #chips.yt-chip-cloud-renderer,
  383.     html #items.ytd-merch-shelf-renderer,
  384.     html #items.ytd-product-details-image-carousel-renderer,
  385.     html ytd-video-preview,
  386.     html #player-container.ytd-video-preview,
  387.     html #primaryProgress.tp-yt-paper-progress,
  388.     html #secondaryProgress.tp-yt-paper-progress,
  389.     html ytd-miniplayer[enabled] /* ,
  390.     html .yt-spec-touch-feedback-shape__fill,
  391.     html .yt-spec-touch-feedback-shape__stroke */ {
  392.         will-change: unset;
  393.     }
  394.  
  395.     /* other */
  396.     .ytp-videowall-still-info-content[class],
  397.     .ytp-suggestion-image[class] {
  398.         will-change: unset !important;
  399.     }
  400.  
  401.   ` : '';
  402.  
  403.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  404.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  405.  
  406.     elzm-fonts {
  407.         visibility: collapse;
  408.         position: fixed;
  409.         top: -10px;
  410.         left: -10px;
  411.         font-size: 10pt;
  412.         line-height: 100%;
  413.         width: 100px;
  414.         height: 100px;
  415.         transform: scale(0.1);
  416.         transform: scale(0.01);
  417.         transform: scale(0.001);
  418.         transform-origin: 0 0;
  419.         contain: strict;
  420.         display: block;
  421.  
  422.         pointer-events: none !important;
  423.         user-select: none !important;
  424.     }
  425.  
  426.     elzm-fonts[id]#elzm-fonts-yk75g {
  427.         user-select: none !important;
  428.         pointer-events: none !important;
  429.     }
  430.  
  431.     elzm-font {
  432.         visibility: collapse;
  433.         position: absolute;
  434.         line-height: 100%;
  435.         width: 100px;
  436.         height: 100px;
  437.         contain: strict;
  438.         display: block;
  439.  
  440.         user-select: none !important;
  441.         pointer-events: none !important;
  442.     }
  443.  
  444.     elzm-font::before {
  445.         visibility: collapse;
  446.         position: absolute;
  447.         line-height: 100%;
  448.         width: 100px;
  449.         height: 100px;
  450.         contain: strict;
  451.         display: block;
  452.  
  453.         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';
  454.  
  455.         user-select: none !important;
  456.         pointer-events: none !important;
  457.     }
  458.  
  459.   `: '';
  460.  
  461.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  462.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  463.         -webkit-backdrop-filter: none;
  464.         backdrop-filter: none;
  465.     }
  466.   `: '';
  467.  
  468.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  469.  
  470.     @keyframes blinker-miuzp {
  471.         0%, 60%, 100% {
  472.             opacity: 1;
  473.         }
  474.         30% {
  475.             opacity: 0.6;
  476.         }
  477.     }
  478.  
  479.     yt-icon-button#show-more.has-new-messages-miuzp {
  480.         animation: blinker-miuzp 1.74s linear infinite;
  481.     }
  482.  
  483.   `: '';
  484.  
  485.  
  486.   const addCss = () => `
  487.  
  488.   @property --ticker-rtime {
  489.     syntax: "<percentage>";
  490.     inherits: false;
  491.     initial-value: 0%;
  492.   }
  493.  
  494.   /*
  495.   .run-ticker {
  496.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  497.   }
  498.  
  499.   .run-ticker-test {
  500.     background: #00000001;
  501.   }
  502.  
  503.   .run-ticker-forced,
  504.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  505.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  506.   {
  507.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  508.   }
  509.   */
  510.  
  511.   .run-ticker {
  512.     --ticker-bg:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  513.   }
  514.  
  515.   .run-ticker,
  516.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  517.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  518.   {
  519.     background: var(--ticker-bg) !important;
  520.   }
  521.  
  522.   yt-live-chat-ticker-dummy777-item-renderer {
  523.     background: #00000001;
  524.   }
  525.  
  526.   yt-live-chat-ticker-dummy777-item-renderer[dummy777] {
  527.     position: fixed !important;
  528.     top: -1000px !important;
  529.     left: -1000px !important;
  530.     font-size: 1px !important;
  531.     color: transparent !important;
  532.     pointer-events: none !important;
  533.     z-index: -1 !important;
  534.     contain: strict !important;
  535.     box-sizing: border-box !important;
  536.     pointer-events: none !important;
  537.     user-select: none !important;
  538.     max-width: 1px !important;
  539.     max-height: 1px !important;
  540.     overflow: hidden !important;
  541.     visibility: collapse !important;
  542.     display: none !important;
  543.   }
  544.  
  545.   yt-live-chat-ticker-dummy777-item-renderer #container {
  546.     background: inherit;
  547.   }
  548.  
  549.  
  550.   ${cssText8_fonts_pre_render}
  551.  
  552.   ${cssText9_no_backdrop_filter_when_menu_shown}
  553.  
  554.   @supports (contain: layout paint style) {
  555.  
  556.     ${cssText5}
  557.  
  558.   }
  559.  
  560.   @supports (color: var(--general)) {
  561.  
  562.     html {
  563.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  564.     }
  565.  
  566.     ${cssText3_smooth_transform_position}
  567.  
  568.     ${cssText7c_will_change_unset}
  569.  
  570.     ${cssText7b_content_visibility_unset}
  571.  
  572.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  573.         overflow-y: scroll;
  574.         padding-right: 0;
  575.     }
  576.  
  577.     ${cssText4_smooth_transform_forced_props}
  578.  
  579.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  580.         pointer-events: none !important;
  581.     }
  582.  
  583.     #continuations, #continuations * {
  584.         contain: strict;
  585.         position: fixed;
  586.         top: 2px;
  587.         height: 1px;
  588.         width: 2px;
  589.         height: 1px;
  590.         visibility: collapse;
  591.     }
  592.  
  593.     ${cssText6b_show_more_button}
  594.  
  595.     ${cssText6d_input_panel_border}
  596.  
  597.     ${cssText6c_input_panel_overflow}
  598.  
  599.   }
  600.  
  601.  
  602.   @supports (overflow-anchor: auto) {
  603.  
  604.     .no-anchor * {
  605.         overflow-anchor: none;
  606.     }
  607.     .no-anchor > item-anchor {
  608.         overflow-anchor: auto;
  609.     }
  610.  
  611.     item-anchor {
  612.  
  613.         height:1px;
  614.         width: 100%;
  615.         transform: scaleY(0.00001);
  616.         transform-origin:0 0;
  617.         contain: strict;
  618.         opacity:0;
  619.         display:flex;
  620.         position:relative;
  621.         flex-shrink:0;
  622.         flex-grow:0;
  623.         margin-bottom:0;
  624.         overflow:hidden;
  625.         box-sizing:border-box;
  626.         visibility: visible;
  627.         content-visibility: visible;
  628.         contain-intrinsic-size: auto 1px;
  629.         pointer-events:none !important;
  630.  
  631.     }
  632.  
  633.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  634.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  635.     }
  636.  
  637.     html item-anchor {
  638.  
  639.         height: 1px;
  640.         width: 1px;
  641.         top: auto;
  642.         left: auto;
  643.         right: auto;
  644.         bottom: auto;
  645.         transform: translateY(-1px);
  646.         position: absolute;
  647.         z-index: -1;
  648.  
  649.     }
  650.  
  651.   }
  652.  
  653.   @supports (color: var(--pre-rendering)) {
  654.  
  655.     @keyframes dontRenderAnimation {
  656.         0% {
  657.             background-position-x: 3px;
  658.         }
  659.         100% {
  660.             background-position-x: 4px;
  661.         }
  662.     }
  663.  
  664.     .dont-render[class] {
  665.         /* visibility: collapse !important; */
  666.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  667.  
  668.         transform: scale(0.01) !important;
  669.         transform: scale(0.00001) !important;
  670.         transform: scale(0.0000001) !important;
  671.         transform-origin: 0 0 !important;
  672.         z-index: -1 !important;
  673.         contain: strict !important;
  674.         box-sizing: border-box !important;
  675.  
  676.         height: 1px !important;
  677.         height: 0.1px !important;
  678.         height: 0.01px !important;
  679.         height: 0.0001px !important;
  680.         height: 0.000001px !important;
  681.  
  682.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  683.  
  684.         pointer-events: none !important;
  685.         user-select: none !important;
  686.  
  687.     }
  688.  
  689.     #sk35z {
  690.       display: block !important;
  691.  
  692.       visibility: collapse !important;
  693.  
  694.       transform: scale(0.01) !important;
  695.       transform: scale(0.00001) !important;
  696.       transform: scale(0.0000001) !important;
  697.       transform-origin: 0 0 !important;
  698.       z-index: -1 !important;
  699.       contain: strict !important;
  700.       box-sizing: border-box !important;
  701.  
  702.       height: 1px !important;
  703.       height: 0.1px !important;
  704.       height: 0.01px !important;
  705.       height: 0.0001px !important;
  706.       height: 0.000001px !important;
  707.  
  708.       position: absolute !important;
  709.       top: -1000px !important;
  710.       left: -1000px !important;
  711.  
  712.     }
  713.  
  714.   }
  715.  
  716.   ${cssText10_show_more_blinker}
  717.  
  718.   `;
  719.  
  720.  
  721.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  722.  
  723.   // Create a unique key for the script and check if it is already running
  724.   const hkey_script = 'mchbwnoasqph';
  725.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  726.   win[hkey_script] = true;
  727.  
  728.   if (!!ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  729.  
  730.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  731.     if (te4 < 3) {
  732.       setTimeout(() => { });
  733.       setTimeout(() => { });
  734.     }
  735.  
  736.   }
  737.  
  738.  
  739.   function dr(s) {
  740.     // reserved for future use
  741.     return s;
  742.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  743.   }
  744.  
  745.   const getProto = (element) => {
  746.     if (element) {
  747.       const cnt = element.inst || element;
  748.       return cnt.constructor.prototype || null;
  749.     }
  750.     return null;
  751.   }
  752.  
  753.   const assertor = (f) => f() || console.assert(false, f + "");
  754.  
  755.   const fnIntegrity = (f, d) => {
  756.     if (!f || typeof f !== 'function') {
  757.       console.warn('f is not a function', f);
  758.       return;
  759.     }
  760.     let p = f + "", s = 0, j = -1, w = 0;
  761.     for (let i = 0, l = p.length; i < l; i++) {
  762.       const t = p[i];
  763.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  764.         if (j < i - 1) w++;
  765.         j = i;
  766.       } else {
  767.         s++;
  768.       }
  769.     }
  770.     let itz = `${f.length}.${s}.${w}`;
  771.     if (!d) {
  772.       return itz;
  773.     } else {
  774.       return itz === d;
  775.     }
  776.   }
  777.  
  778.  
  779.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  780.  
  781.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  782.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  783.   if (!isContainSupport) {
  784.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  785.   } else {
  786.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  787.   }
  788.  
  789.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  790.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  791.   if (!isOverflowAnchorSupport) {
  792.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  793.   } else {
  794.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  795.   }
  796.  
  797.   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.
  798.  
  799.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  800.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  801.  
  802.   let hasTimerModified = null;
  803.   const DO_CHECK_TICKER_BACKGROUND_OVERRIDED = !!ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF || ENABLE_RAF_HACK_TICKERS;
  804.  
  805.   const fxOperator = (proto, propertyName) => {
  806.     let propertyDescriptorGetter = null;
  807.     try {
  808.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  809.     } catch (e) { }
  810.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  811.       try {
  812.  
  813.         return propertyDescriptorGetter.call(dr(e));
  814.       } catch (e) { }
  815.       return e[propertyName];
  816.     } : (e) => e[propertyName];
  817.   };
  818.  
  819.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  820.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  821.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  822.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  823.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  824.  
  825.   const groupCollapsed = (text1, text2) => {
  826.  
  827.     console.groupCollapsed(`%c${text1}%c${text2}`,
  828.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  829.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  830.     );
  831.   }
  832.  
  833.  
  834.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  835.   const onRegistryReady = (callback) => {
  836.     if (typeof customElements === 'undefined') {
  837.       if (!('__CE_registry' in document)) {
  838.         // https://github.com/webcomponents/polyfills/
  839.         Object.defineProperty(document, '__CE_registry', {
  840.           get() {
  841.             // return undefined
  842.           },
  843.           set(nv) {
  844.             if (typeof nv == 'object') {
  845.               delete this.__CE_registry;
  846.               this.__CE_registry = nv;
  847.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  848.             }
  849.             return true;
  850.           },
  851.           enumerable: false,
  852.           configurable: true
  853.         })
  854.       }
  855.       let eventHandler = (evt) => {
  856.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  857.         const f = callback;
  858.         callback = null;
  859.         eventHandler = null;
  860.         f();
  861.       };
  862.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  863.     } else {
  864.       callback();
  865.     }
  866.   };
  867.  
  868.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  869.  
  870.   /* globals WeakRef:false */
  871.  
  872.   /** @type {(o: Object | null) => WeakRef | null} */
  873.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  874.  
  875.   /** @type {(wr: Object | null) => Object | null} */
  876.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  877.  
  878.   const { addCssManaged } = (() => {
  879.  
  880.     const addFontPreRendering = () => {
  881.  
  882.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  883.  
  884.       let efsContainer = document.createElement('elzm-fonts');
  885.       efsContainer.id = 'elzm-fonts-yk75g'
  886.  
  887.       const arr = [];
  888.       let p = document.createElement('elzm-font');
  889.       arr.push(p);
  890.  
  891.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  892.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  893.  
  894.           p = document.createElement('elzm-font');
  895.           p.style.fontWeight = size;
  896.           arr.push(p);
  897.         }
  898.       }
  899.  
  900.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  901.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  902.  
  903.           p = document.createElement('elzm-font');
  904.           p.style.fontFamily = 'Roboto';
  905.           p.style.fontWeight = size;
  906.           arr.push(p);
  907.         }
  908.       }
  909.  
  910.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  911.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  912.  
  913.           p = document.createElement('elzm-font');
  914.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  915.           p.style.fontWeight = size;
  916.           arr.push(p);
  917.         }
  918.       }
  919.  
  920.  
  921.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  922.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  923.  
  924.           p = document.createElement('elzm-font');
  925.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  926.           p.style.fontWeight = size;
  927.           arr.push(p);
  928.         }
  929.       }
  930.  
  931.  
  932.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  933.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  934.  
  935.           p = document.createElement('elzm-font');
  936.           p.style.fontFamily = 'sans-serif';
  937.           p.style.fontWeight = size;
  938.           arr.push(p);
  939.         }
  940.       }
  941.  
  942.       console.log('number of elzm-font elements', arr.length);
  943.  
  944.       HTMLElement.prototype.append.apply(efsContainer, arr);
  945.  
  946.       (document.body || document.documentElement).appendChild(efsContainer);
  947.  
  948.  
  949.       console.log('elzm-font elements have been added to the page for rendering.');
  950.  
  951.       console.groupEnd();
  952.  
  953.     }
  954.  
  955.     let isCssAdded = false;
  956.  
  957.     function addCssElement() {
  958.       let s = document.createElement('style');
  959.       s.id = 'ewRvC';
  960.       return s;
  961.     }
  962.  
  963.     const addCssManaged = () => {
  964.       if (!isCssAdded && document.documentElement && document.head) {
  965.         isCssAdded = true;
  966.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  967.         if (ENABLE_FONT_PRE_RENDERING) {
  968.           Promise.resolve().then(addFontPreRendering)
  969.         }
  970.       }
  971.     }
  972.  
  973.     return { addCssManaged };
  974.   })();
  975.  
  976.  
  977.   const { setupStyle } = (() => {
  978.  
  979.     const sp7 = Symbol();
  980.  
  981.     const proxyHelperFn = (dummy) => ({
  982.  
  983.       get(target, prop) {
  984.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  985.       },
  986.       set(target, prop, value) {
  987.         if (!(prop in dummy)) {
  988.           target[prop] = value;
  989.         }
  990.         return true;
  991.       },
  992.       has(target, prop) {
  993.         return (prop in target);
  994.       },
  995.       deleteProperty(target, prop) {
  996.         return true;
  997.       },
  998.       ownKeys(target) {
  999.         return Object.keys(target);
  1000.       },
  1001.       defineProperty(target, key, descriptor) {
  1002.         return Object.defineProperty(target, key, descriptor);
  1003.       },
  1004.       getOwnPropertyDescriptor(target, key) {
  1005.         return Object.getOwnPropertyDescriptor(target, key);
  1006.       },
  1007.  
  1008.     });
  1009.  
  1010.     const setupStyle = (m1, m2) => {
  1011.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  1012.  
  1013.       const dummy1v = {
  1014.         transform: '',
  1015.         height: '',
  1016.         minHeight: '',
  1017.         paddingBottom: '',
  1018.         paddingTop: ''
  1019.       };
  1020.  
  1021.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  1022.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  1023.         dummy1v[k] = dummyStyleFn(k);
  1024.       }
  1025.  
  1026.       const dummy1p = proxyHelperFn(dummy1v);
  1027.       const sp1v = new Proxy(m1.style, dummy1p);
  1028.       const sp2v = new Proxy(m2.style, dummy1p);
  1029.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  1030.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  1031.       m1.removeAttribute("style");
  1032.       m2.removeAttribute("style");
  1033.  
  1034.     }
  1035.  
  1036.     return { setupStyle };
  1037.  
  1038.   })();
  1039.  
  1040.  
  1041.  
  1042.   function setThumbnails(config) {
  1043.  
  1044.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1045.  
  1046.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1047.  
  1048.  
  1049.       if (thumbnails && thumbnails.length > 0) {
  1050.         if (flag0 > 0 && thumbnails.length > 1) {
  1051.           let pSize = 0;
  1052.           let newThumbnails = [];
  1053.           for (const thumbnail of thumbnails) {
  1054.             if (!thumbnail || !thumbnail.url) continue;
  1055.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1056.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1057.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1058.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1059.               newThumbnails.push(thumbnail);
  1060.               if (imageLinks) imageLinks.add(thumbnail.url);
  1061.             }
  1062.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1063.               pSize = thumbnail.width;
  1064.             }
  1065.           }
  1066.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1067.             baseObject.thumbnails = newThumbnails;
  1068.           } else {
  1069.             newThumbnails.length = 0;
  1070.           }
  1071.           newThumbnails = null;
  1072.         } else {
  1073.           for (const thumbnail of thumbnails) {
  1074.             if (thumbnail && thumbnail.url) {
  1075.               if (imageLinks) imageLinks.add(thumbnail.url);
  1076.             }
  1077.           }
  1078.         }
  1079.       }
  1080.  
  1081.     }
  1082.   }
  1083.  
  1084.   function fixLiveChatItem(item, imageLinks) {
  1085.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1086.     if (liveChatTextMessageRenderer) {
  1087.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1088.       if (messageRuns && messageRuns.length > 0) {
  1089.         for (const run of messageRuns) {
  1090.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1091.           setThumbnails({
  1092.             baseObject: emojiImage,
  1093.             thumbnails: emojiImage.thumbnails,
  1094.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1095.             imageLinks
  1096.           });
  1097.         }
  1098.       }
  1099.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1100.       setThumbnails({
  1101.         baseObject: authorPhoto,
  1102.         thumbnails: authorPhoto.thumbnails,
  1103.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1104.         imageLinks
  1105.       });
  1106.     }
  1107.   }
  1108.  
  1109.  
  1110.   const cleanContext = async (win) => {
  1111.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1112.     try {
  1113.       let mx = 16; // MAX TRIAL
  1114.       const frameId = 'vanillajs-iframe-v1';
  1115.       /** @type {HTMLIFrameElement | null} */
  1116.       let frame = document.getElementById(frameId);
  1117.       let removeIframeFn = null;
  1118.       if (!frame) {
  1119.         frame = document.createElement('iframe');
  1120.         frame.id = 'vanillajs-iframe-v1';
  1121.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1122.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1123.         n.appendChild(frame);
  1124.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1125.         const root = document.documentElement;
  1126.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1127.         removeIframeFn = (setTimeout) => {
  1128.           const removeIframeOnDocumentReady = (e) => {
  1129.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1130.             win = null;
  1131.             setTimeout(() => {
  1132.               n.remove();
  1133.               n = null;
  1134.             }, 200);
  1135.           }
  1136.           if (document.readyState !== 'loading') {
  1137.             removeIframeOnDocumentReady();
  1138.           } else {
  1139.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1140.           }
  1141.         }
  1142.       }
  1143.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1144.       const fc = frame.contentWindow;
  1145.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1146.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  1147.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  1148.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1149.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1150.       res.animate = HTMLElement.prototype.animate;
  1151.       return res;
  1152.     } catch (e) {
  1153.       console.warn(e);
  1154.       return null;
  1155.     }
  1156.   };
  1157.  
  1158.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1159.  
  1160.     const flags = () => {
  1161.       try {
  1162.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1163.       } catch (e) { }
  1164.       return null;
  1165.     };
  1166.  
  1167.     const flagsForced = () => {
  1168.       try {
  1169.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1170.       } catch (e) { }
  1171.       return null;
  1172.     };
  1173.  
  1174.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1175.  
  1176.       if (!EXPERIMENT_FLAGS) return;
  1177.  
  1178.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1179.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1180.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1181.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1182.         }
  1183.       }
  1184.  
  1185.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1186.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1187.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1188.       }
  1189.  
  1190.     };
  1191.  
  1192.     const uf = (EXPERIMENT_FLAGS) => {
  1193.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1194.       if (EXPERIMENT_FLAGS) {
  1195.         flagsFn(EXPERIMENT_FLAGS);
  1196.         flagsFn(flagsForced());
  1197.       }
  1198.     }
  1199.  
  1200.     uf();
  1201.  
  1202.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1203.  
  1204.       uf();
  1205.       let cidFlags = 0;
  1206.       let kd = 0;
  1207.       new Promise(flagResolve => {
  1208.  
  1209.         const flagTimer = () => {
  1210.           const EXPERIMENT_FLAGS = flags();
  1211.           if (!EXPERIMENT_FLAGS) return;
  1212.           uf(EXPERIMENT_FLAGS);
  1213.           if (kd > 0) return;
  1214.           kd = 1;
  1215.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1216.           const moDeferred = new Promise(resolve => {
  1217.             let mo = new MutationObserver(() => {
  1218.               if (mo) {
  1219.                 mo.disconnect();
  1220.                 mo.takeRecords();
  1221.                 mo = null;
  1222.                 resolve();
  1223.               }
  1224.             });
  1225.             mo.observe(document, { subtree: true, childList: true });
  1226.           });
  1227.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1228.         };
  1229.  
  1230.         uf();
  1231.         cidFlags = setInterval(flagTimer, 1);
  1232.       }).then(() => {
  1233.         if (cidFlags > 0) clearInterval(cidFlags);
  1234.         cidFlags = 0;
  1235.         uf();
  1236.       });
  1237.  
  1238.     }
  1239.  
  1240.     return flagsFnOnInterval;
  1241.  
  1242.   })() : null;
  1243.  
  1244.   let kptPF = null;
  1245.   const emojiPrefetched = new Set();
  1246.   const authorPhotoPrefetched = new Set();
  1247.  
  1248.   function linker(link, rel, href, _as) {
  1249.     return new Promise(resolve => {
  1250.       if (!link) link = document.createElement('link');
  1251.       link.rel = rel;
  1252.       if (_as) link.setAttribute('as', _as);
  1253.       link.onload = function () {
  1254.         resolve({
  1255.           link: this,
  1256.           success: true
  1257.         })
  1258.         this.remove();
  1259.       };
  1260.       link.onerror = function () {
  1261.         resolve({
  1262.           link: this,
  1263.           success: false
  1264.         });
  1265.         this.remove();
  1266.       };
  1267.       link.href = href;
  1268.       document.head.appendChild(link);
  1269.       link = null;
  1270.     });
  1271.   }
  1272.  
  1273.   cleanContext(win).then(__CONTEXT__ => {
  1274.     if (!__CONTEXT__) return null;
  1275.  
  1276.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate } = __CONTEXT__;
  1277.  
  1278.     let aeConstructor = null;
  1279.  
  1280.     // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  1281.     let pairForPauseResume = 0; // each increasion = number of ticker
  1282.     let pairForPauseResumeM = 0;
  1283.     // << end >>
  1284.  
  1285.     if (flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1286.  
  1287.     function basePrefetching() {
  1288.  
  1289.       new Promise(resolve => {
  1290.  
  1291.         if (document.readyState !== 'loading') {
  1292.           resolve();
  1293.         } else {
  1294.           win.addEventListener("DOMContentLoaded", resolve, false);
  1295.         }
  1296.  
  1297.       }).then(() => {
  1298.         const hostL1 = [
  1299.           'https://www.youtube.com', 'https://googlevideo.com',
  1300.           'https://googleapis.com', 'https://accounts.youtube.com',
  1301.           'https://www.gstatic.com', 'https://ggpht.com',
  1302.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1303.         ];
  1304.  
  1305.         const hostL2 = [
  1306.           'https://youtube.com',
  1307.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1308.         ];
  1309.  
  1310.         let link = null;
  1311.  
  1312.         function kn() {
  1313.  
  1314.           link = document.createElement('link');
  1315.           if (link.relList && link.relList.supports) {
  1316.             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)
  1317.           } else {
  1318.             kptPF = 0;
  1319.           }
  1320.  
  1321.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1322.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1323.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1324.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1325.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1326.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1327.           console.groupEnd();
  1328.  
  1329.         }
  1330.  
  1331.         for (const h of hostL1) {
  1332.  
  1333.           if (kptPF === null) kn();
  1334.           if (ENABLE_BASE_PREFETCHING) {
  1335.             // if (kptPF & 1) {
  1336.             //   linker(link, 'dns-prefetch', h);
  1337.             //   link = null;
  1338.             // }
  1339.             if (kptPF & 2) {
  1340.               linker(link, 'preconnect', h);
  1341.               link = null;
  1342.             }
  1343.           }
  1344.         }
  1345.  
  1346.         for (const h of hostL2) {
  1347.           if (kptPF === null) kn();
  1348.           if (ENABLE_BASE_PREFETCHING) {
  1349.             if (kptPF & 1) {
  1350.               linker(link, 'dns-prefetch', h);
  1351.               link = null;
  1352.             }
  1353.           }
  1354.         }
  1355.  
  1356.       })
  1357.  
  1358.  
  1359.     }
  1360.  
  1361.     basePrefetching();
  1362.  
  1363.     (() => {
  1364.       // data manipulation
  1365.  
  1366.       if (!DO_PARTICIPANT_LIST_HACKS) return;
  1367.  
  1368.       class Mutex {
  1369.  
  1370.         constructor() {
  1371.           this.p = Promise.resolve()
  1372.         }
  1373.  
  1374.         /**
  1375.          *  @param {(lockResolve: () => void)} f
  1376.          */
  1377.         lockWith(f) {
  1378.           this.p = this.p.then(() => new Promise(f).catch(console.warn))
  1379.         }
  1380.  
  1381.       }
  1382.  
  1383.  
  1384.       /**
  1385.  
  1386.        h.onParticipantsChanged = function() {
  1387.           this.notifyPath("participantsManager.participants")
  1388.       }
  1389.  
  1390.  
  1391.       at h.onParticipantsChanged (live_chat_polymer.js:8334:41)
  1392.       at e.<anonymous> (live_chat_polymer.js:1637:69)
  1393.       at e.Bb [as __shady_dispatchEvent] (webcomponents-sd.js:46:110)
  1394.       at k.dispatchEvent (webcomponents-sd.js:122:237)
  1395.       at mu (live_chat_polymer.js:1677:71)
  1396.       at Object.wga [as fn] (live_chat_polymer.js:1678:99)
  1397.       at a._propertiesChanged (live_chat_polymer.js:1726:426)
  1398.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1399.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1400.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1401.  
  1402.       */
  1403.  
  1404.  
  1405.       const beforeParticipantsMap = new WeakMap();
  1406.  
  1407.       const { notifyPath7081 } = (() => {
  1408.  
  1409.         const mutexParticipants = new Mutex();
  1410.  
  1411.         let uvid = 0;
  1412.         let r95dm = 0;
  1413.         let c95dm = -1;
  1414.  
  1415.         const foundMap = (base, content) => {
  1416.           /*
  1417.             let lastSearch = 0;
  1418.             let founds = base.map(baseEntry => {
  1419.               let search = content.indexOf(baseEntry, lastSearch);
  1420.               if (search < 0) return false;
  1421.               lastSearch = search + 1;
  1422.               return true;
  1423.             });
  1424.             return founds;
  1425.           */
  1426.           const contentSet = new Set(content);
  1427.           return base.map(baseEntry => contentSet.has(baseEntry));
  1428.  
  1429.         }
  1430.  
  1431.  
  1432.  
  1433.         const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1434.  
  1435.           const handler1 = {
  1436.             get(target, prop, receiver) {
  1437.               if (prop === 'object') {
  1438.                 return participants; // avoid memory leakage
  1439.               }
  1440.               if (prop === 'type') {
  1441.                 return 'splice';
  1442.               }
  1443.               return target[prop];
  1444.             }
  1445.           };
  1446.           const releaser = () => {
  1447.             participants = null;
  1448.           }
  1449.  
  1450.           let foundsForAfter = foundMap(idsAfter, idsBefore);
  1451.           let foundsForBefore = foundMap(idsBefore, idsAfter);
  1452.  
  1453.           let indexSplices = [];
  1454.           let contentUpdates = [];
  1455.           for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1456.             if (beforeParticipants[i] === participants[j]) {
  1457.               i++; j++;
  1458.             } else if (idsBefore[i] === idsAfter[j]) {
  1459.               // content changed
  1460.               contentUpdates.push({ indexI: i, indexJ: j })
  1461.               i++; j++;
  1462.             } else {
  1463.               let addedCount = 0;
  1464.               for (let q = j; q < foundsForAfter.length; q++) {
  1465.                 if (foundsForAfter[q] === false) addedCount++;
  1466.                 else break;
  1467.               }
  1468.               let removedCount = 0;
  1469.               for (let q = i; q < foundsForBefore.length; q++) {
  1470.                 if (foundsForBefore[q] === false) removedCount++;
  1471.                 else break;
  1472.               }
  1473.               if (!addedCount && !removedCount) {
  1474.                 throw 'ERROR(0xFF32): spliceIndicesFunc';
  1475.               }
  1476.               indexSplices.push(new Proxy({
  1477.                 index: j,
  1478.                 addedCount: addedCount,
  1479.                 removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1480.               }, handler1));
  1481.               i += removedCount;
  1482.               j += addedCount;
  1483.             }
  1484.           }
  1485.           foundsForBefore = null;
  1486.           foundsForAfter = null;
  1487.           idsBefore = null;
  1488.           idsAfter = null;
  1489.           beforeParticipants = null;
  1490.           return { indexSplices, contentUpdates, releaser };
  1491.  
  1492.         }
  1493.  
  1494.         /*
  1495.  
  1496.         customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1497.  
  1498.         VM63631:1 Error
  1499.         at customElements.get.notifyPath (<anonymous>:1:122)
  1500.         at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1501.         at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1502.         at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1503.         at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1504.         at ju (live_chat_polymer.js:1674:217)
  1505.         at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1506.         at b._flushProperties (live_chat_polymer.js:1597:200)
  1507.         at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1508.         at a.notifyPath (live_chat_polymer.js:1741:182)
  1509.  
  1510.         */
  1511.  
  1512.         function convertToIds(participants) {
  1513.           return participants.map(participant => {
  1514.             if (!participant || typeof participant !== 'object') {
  1515.               console.warn('Error(0xFA41): convertToIds', participant);
  1516.               return participant; // just in case
  1517.             }
  1518.             let keys = Object.keys(participant);
  1519.             // liveChatTextMessageRenderer
  1520.             // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1521.             // liveChatPaidMessageRenderer
  1522.             /*
  1523.  
  1524.               'yt-live-chat-participant-renderer' utilizes the following:
  1525.               authorName.simpleText: string
  1526.               authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1527.               authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1528.               authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1529.               authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1530.  
  1531.             */
  1532.             if (keys.length !== 1) {
  1533.               console.warn('Error(0xFA42): convertToIds', participant);
  1534.               return participant; // just in case
  1535.             }
  1536.             let key = keys[0];
  1537.             let renderer = (participant[key] || 0);
  1538.             let authorName = (renderer.authorName || 0);
  1539.             let text = `${authorName.simpleText || authorName.text}`
  1540.             let res = participant; // fallback if it is not a vaild entry
  1541.             if (typeof text !== 'string') {
  1542.               console.warn('Error(0xFA53): convertToIds', participant);
  1543.             } else {
  1544.               text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1545.               if (text.length > 1) res = text;
  1546.             }
  1547.             return res;
  1548.             // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1549.             // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1550.           });
  1551.         }
  1552.  
  1553.         const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1554.           // just update when content is changed.
  1555.           if (p1.authorName !== p2.authorName) return true;
  1556.           if (p1.authorPhoto !== p2.authorPhoto) return true;
  1557.           if (p1.authorBadges !== p2.authorBadges) return true;
  1558.           return false;
  1559.         } : (p1, p2) => {
  1560.           // keep integrity all the time.
  1561.           return p1 !== p2; // always true
  1562.         }
  1563.  
  1564.         function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1565.  
  1566.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1567.             if (path !== "participantsManager.participants") {
  1568.               return this.__notifyPath5036__.apply(this, arguments);
  1569.             }
  1570.             if (c95dm === r95dm) return;
  1571.           } else {
  1572.             const stack = new Error().stack;
  1573.             if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1574.               return this.__notifyPath5036__.apply(this, arguments);
  1575.             }
  1576.           }
  1577.  
  1578.           if (uvid > 1e8) uvid = uvid % 100;
  1579.           let tid = ++uvid;
  1580.  
  1581.           const cnt = this; // "yt-live-chat-participant-list-renderer"
  1582.           mutexParticipants.lockWith(lockResolve => {
  1583.  
  1584.             const participants00 = cnt.participantsManager.participants;
  1585.  
  1586.             if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1587.               lockResolve();
  1588.               return;
  1589.             }
  1590.  
  1591.             let doUpdate = false;
  1592.  
  1593.             if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1594.  
  1595.               if (!participants00.r94dm) {
  1596.                 participants00.r94dm = 1;
  1597.                 if (++r95dm > 1e9) r95dm = 9;
  1598.                 participants00.push = function () {
  1599.                   if (++r95dm > 1e9) r95dm = 9;
  1600.                   return Array.prototype.push.apply(this, arguments);
  1601.                 }
  1602.                 participants00.pop = function () {
  1603.                   if (++r95dm > 1e9) r95dm = 9;
  1604.                   return Array.prototype.pop.apply(this, arguments);
  1605.                 }
  1606.                 participants00.shift = function () {
  1607.                   if (++r95dm > 1e9) r95dm = 9;
  1608.                   return Array.prototype.shift.apply(this, arguments);
  1609.                 }
  1610.                 participants00.unshift = function () {
  1611.                   if (++r95dm > 1e9) r95dm = 9;
  1612.                   return Array.prototype.unshift.apply(this, arguments);
  1613.                 }
  1614.                 participants00.splice = function () {
  1615.                   if (++r95dm > 1e9) r95dm = 9;
  1616.                   return Array.prototype.splice.apply(this, arguments);
  1617.                 }
  1618.                 participants00.sort = function () {
  1619.                   if (++r95dm > 1e9) r95dm = 9;
  1620.                   return Array.prototype.sort.apply(this, arguments);
  1621.                 }
  1622.                 participants00.reverse = function () {
  1623.                   if (++r95dm > 1e9) r95dm = 9;
  1624.                   return Array.prototype.reverse.apply(this, arguments);
  1625.                 }
  1626.               }
  1627.  
  1628.               if (c95dm !== r95dm) {
  1629.                 c95dm = r95dm;
  1630.                 doUpdate = true;
  1631.               }
  1632.  
  1633.             } else {
  1634.               doUpdate = true;
  1635.             }
  1636.  
  1637.             if (!doUpdate) {
  1638.               lockResolve();
  1639.               return;
  1640.             }
  1641.  
  1642.             const participants = participants00.slice(0);
  1643.             const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1644.             beforeParticipantsMap.set(cnt, participants);
  1645.  
  1646.             const resPromise = (async () => {
  1647.  
  1648.               if (beforeParticipants.length === 0) {
  1649.                 // not error
  1650.                 return 0;
  1651.               }
  1652.  
  1653.               let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1654.  
  1655.               // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1656.               if (beforeParticipants.length !== countOfElements) {
  1657.                 // there is somewrong for the cache. - sometimes happen
  1658.                 return 0;
  1659.               }
  1660.  
  1661.               const idsBefore = convertToIds(beforeParticipants);
  1662.               const idsAfter = convertToIds(participants);
  1663.  
  1664.               let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1665.  
  1666.               let res = 1; // default 1 for no update
  1667.  
  1668.               if (indexSplices.length >= 1) {
  1669.  
  1670.  
  1671.                 // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1672.                 // let p1 = indexSplices[0].removed;
  1673.                 // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1674.  
  1675.                 /* folllow
  1676.                     a.notifyPath(c + ".splices", d);
  1677.                     a.notifyPath(c + ".length", b.length);
  1678.                 */
  1679.                 // stampDomArraySplices_
  1680.  
  1681.  
  1682.                 await new Promise(resolve => {
  1683.                   cnt.resolveForDOMRendering781 = resolve;
  1684.  
  1685.                   cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1686.                     indexSplices
  1687.                   });
  1688.                   indexSplices = null;
  1689.                   releaser();
  1690.                   releaser = null;
  1691.                   cnt.__notifyPath5036__("participantsManager.participants.length",
  1692.                     participants.length
  1693.                   );
  1694.  
  1695.                 });
  1696.  
  1697.                 await Promise.resolve(0); // play safe for the change of 'length'
  1698.                 countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1699.  
  1700.                 let wrongSize = participants.length !== countOfElements
  1701.                 if (wrongSize) {
  1702.                   console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1703.                   return 0;
  1704.                 }
  1705.  
  1706.                 res = 2 | 4;
  1707.  
  1708.               } else {
  1709.  
  1710.                 indexSplices = null;
  1711.                 releaser();
  1712.                 releaser = null;
  1713.  
  1714.                 if (participants.length !== countOfElements) {
  1715.                   // other unhandled cases
  1716.                   return 0;
  1717.                 }
  1718.  
  1719.               }
  1720.  
  1721.               // participants.length === countOfElements before contentUpdates
  1722.               if (contentUpdates.length >= 1) {
  1723.                 for (const contentUpdate of contentUpdates) {
  1724.                   let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1725.                   if (isChanged) {
  1726.                     cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1727.                     res |= 4 | 8;
  1728.                   }
  1729.                 }
  1730.               }
  1731.               contentUpdates = null;
  1732.  
  1733.               return res;
  1734.  
  1735.  
  1736.             })();
  1737.  
  1738.  
  1739.             resPromise.then(resValue => {
  1740.  
  1741.               const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1742.               isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1743.               if (resValue === 0) {
  1744.                 new Promise(resolve => {
  1745.                   cnt.resolveForDOMRendering781 = resolve;
  1746.                   isLogRequired && console.log("Full Refresh begins");
  1747.                   cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1748.                 }).then(() => {
  1749.                   isLogRequired && console.log("Full Refresh ends");
  1750.                   console.groupEnd();
  1751.                 }).then(lockResolve);
  1752.                 return;
  1753.               }
  1754.  
  1755.               const delayLockResolve = (resValue & 4) === 4;
  1756.  
  1757.               if (delayLockResolve) {
  1758.                 isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1759.                 isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1760.                 isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1761.                 isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1762.                 isLogRequired && console.groupEnd();
  1763.                 // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1764.                 // mutex lock with requestAnimationFrame can also disable participants update in background
  1765.                 requestAnimationFrame(lockResolve);
  1766.               } else {
  1767.                 lockResolve();
  1768.               }
  1769.  
  1770.             });
  1771.  
  1772.           });
  1773.  
  1774.         }
  1775.  
  1776.         return { notifyPath7081 };
  1777.  
  1778.       })();
  1779.  
  1780.  
  1781.       const onRegistryReadyForDataManipulation = () => {
  1782.  
  1783.         function dummy5035(a, b, c) { }
  1784.         function dummy411(a, b, c) { }
  1785.  
  1786.  
  1787.         /*
  1788.          // removed due to https://greasyfork.org/scripts/469878/discussions/197781
  1789.          // cProto.preloadAvatarForAddAction should not be changed.
  1790.         if (REMOVE_PRELOADAVATARFORADDACTION) {
  1791.  
  1792.           customElements.whenDefined("yt-live-chat-renderer").then(() => {
  1793.  
  1794.             const tag = "yt-live-chat-renderer";
  1795.             const cProto = getProto(document.createElement(tag));
  1796.  
  1797.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  1798.  
  1799.             if (typeof cProto.preloadAvatarForAddAction === 'function' && !cProto.preloadAvatarForAddAction66 && cProto.preloadAvatarForAddAction.length === 1) {
  1800.  
  1801.               cProto.preloadAvatarForAddAction66 = cProto.preloadAvatarForAddAction;
  1802.               cProto.preloadAvatarForAddAction = function () {
  1803.                 //  ===== skip  =====
  1804.  
  1805.                 // if (a.item) {
  1806.                 //   a = a.item;
  1807.                 //   var b = Object.keys(a)[0];
  1808.                 //   a = a[b];
  1809.                 //   b = KC(this.get("authorPhoto.thumbnails", a), 24);
  1810.                 //   "string" === typeof b && (this.preloadImage(b),
  1811.                 //     a.authorPhoto.webThumbnailDetailsExtensionData = {
  1812.                 //       isPreloaded: !0
  1813.                 //     })
  1814.                 // }
  1815.  
  1816.                 //  ===== skip  =====
  1817.               }
  1818.               console.log("cProto.preloadAvatarForAddAction - OK");
  1819.             } else {
  1820.               console.log("cProto.preloadAvatarForAddAction - NG");
  1821.  
  1822.             }
  1823.             console.groupEnd();
  1824.  
  1825.             // cProto.preloadImage = function (){
  1826.             //   // although we do in flushItem; just avoid being used by other usages ...
  1827.             // }
  1828.  
  1829.           });
  1830.  
  1831.         }
  1832.         */
  1833.  
  1834.  
  1835.         customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1836.  
  1837.           if (!DO_PARTICIPANT_LIST_HACKS) return;
  1838.  
  1839.           const tag = "yt-live-chat-participant-list-renderer";
  1840.           const cProto = getProto(document.createElement(tag));
  1841.           if (!cProto || typeof cProto.attached !== 'function') {
  1842.             // for _registered, proto.attached shall exist when the element is defined.
  1843.             // for controller extraction, attached shall exist when instance creates.
  1844.             console.warn(`proto.attached for ${tag} is unavailable.`);
  1845.             return;
  1846.           }
  1847.  
  1848.  
  1849.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1850.  
  1851.           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'];
  1852.           const fgs = {};
  1853.           for (const key of fgsArr) fgs[key] = undefined;
  1854.  
  1855.           try {
  1856.             const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1857.             for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1858.           } catch (e) { }
  1859.           console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1860.  
  1861.           const canDoReplacement = (() => {
  1862.             if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1863.               console.warn('YouTube Live Chat Tamer is running.');
  1864.               return;
  1865.             }
  1866.  
  1867.             if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  1868.               console.warn('YouTube Live Chat Tamer is running.');
  1869.               return;
  1870.             }
  1871.  
  1872.             cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  1873.             cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  1874.  
  1875.             if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  1876.               console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  1877.               return;
  1878.             }
  1879.  
  1880.             if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  1881.               console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  1882.               return;
  1883.             }
  1884.  
  1885.             if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  1886.               console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  1887.               return;
  1888.             }
  1889.             return true;
  1890.           })();
  1891.  
  1892.           console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  1893.  
  1894.           assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  1895.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1896.             let fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  1897.             let s = fiRSCB.split('.');
  1898.             if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  1899.               console.log("flushRenderStamperComponentBindings_ - OK", fiRSCB);
  1900.             } else {
  1901.               console.log("flushRenderStamperComponentBindings_ - failed", fiRSCB);
  1902.             }
  1903.           } else {
  1904.             console.log("flushRenderStamperComponentBindings_ - not found");
  1905.           }
  1906.           // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  1907.  
  1908.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1909.             cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  1910.             cProto.flushRenderStamperComponentBindings_ = function () {
  1911.               // console.log('flushRenderStamperComponentBindings_')
  1912.               this.flushRenderStamperComponentBindings66_();
  1913.               if (this.resolveForDOMRendering781) {
  1914.                 this.resolveForDOMRendering781();
  1915.                 this.resolveForDOMRendering781 = null;
  1916.               }
  1917.             };
  1918.           }
  1919.  
  1920.           cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  1921.             const container = ((this || 0).$ || 0).participants;
  1922.             if (!container) return 0;
  1923.             return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  1924.           }
  1925.  
  1926.           const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  1927.  
  1928.           cProto.__attached412__ = cProto.attached;
  1929.           const fpPList = function (hostElement) {
  1930.             const cnt = hostElement.inst || hostElement;
  1931.             if (beforeParticipantsMap.has(cnt)) return;
  1932.             hostElement.classList.add('n9fJ3');
  1933.  
  1934.             assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  1935.             if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  1936.               console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  1937.               return;
  1938.             }
  1939.  
  1940.             groupCollapsed("Participant List attached", "");
  1941.             // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  1942.             //   console.log(123, 'appendChild');
  1943.             //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  1944.             // }
  1945.  
  1946.             // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  1947.             //   console.log(123, 'insertBefore');
  1948.             //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  1949.             // }
  1950.  
  1951.             cnt.__notifyPath5036__ = cnt.notifyPath
  1952.             const participants = ((cnt.participantsManager || 0).participants || 0);
  1953.             assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  1954.             console.log(`initial number of participants: ${participants.length}`);
  1955.             const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  1956.             beforeParticipantsMap.set(cnt, newParticipants);
  1957.             cnt.notifyPath = notifyPath7081;
  1958.             console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  1959.             console.groupEnd();
  1960.           }
  1961.           cProto.attached = function () {
  1962.             fpPList(this.hostElement || this);
  1963.             this.__attached412__.apply(this, arguments);
  1964.           };
  1965.  
  1966.  
  1967.           if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  1968.  
  1969.             /** @type {boolean | (()=>boolean)} */
  1970.             let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  1971.             if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  1972.  
  1973.               let lastMessageDate = 0;
  1974.               cProto.stampDomArray66_ = cProto.stampDomArray_;
  1975.  
  1976.               cProto.stampDomArray_ = function (...args) {
  1977.                 if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  1978.                   if (typeof toUseMaintainStableList === 'function') {
  1979.                     toUseMaintainStableList = toUseMaintainStableList();
  1980.                   }
  1981.                   args[5] = toUseMaintainStableList;
  1982.                   let currentDate = Date.now();
  1983.                   if (currentDate - lastMessageDate > 440) {
  1984.                     lastMessageDate = currentDate;
  1985.                     console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  1986.                   }
  1987.                 }
  1988.                 return this.stampDomArray66_.apply(this, args);
  1989.               }
  1990.  
  1991.               cProto.stampDomArray_.nIegT = 1;
  1992.  
  1993.             }
  1994.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  1995.           } else {
  1996.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  1997.           }
  1998.  
  1999.           console.groupEnd();
  2000.  
  2001.           if (onPageElements.length >= 1) {
  2002.             for (const s of onPageElements) {
  2003.               if ((s.inst || s).isAttached === true) {
  2004.                 fpPList(s);
  2005.               }
  2006.             }
  2007.           }
  2008.  
  2009.         });
  2010.  
  2011.       };
  2012.  
  2013.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2014.  
  2015.  
  2016.     })();
  2017.  
  2018.     IntersectionObserver && (() => {
  2019.  
  2020.       // dom manipulation
  2021.  
  2022.       class RAFHub {
  2023.         constructor() {
  2024.           /** @type {number} */
  2025.           this.startAt = 8170;
  2026.           /** @type {number} */
  2027.           this.counter = 0;
  2028.           /** @type {number} */
  2029.           this.rid = 0;
  2030.           /** @type {Map<number, FrameRequestCallback>} */
  2031.           this.funcs = new Map();
  2032.           const funcs = this.funcs;
  2033.           /** @type {FrameRequestCallback} */
  2034.           this.bCallback = this.mCallback.bind(this);
  2035.           this.pClear = () => funcs.clear();
  2036.         }
  2037.         /** @param {DOMHighResTimeStamp} highResTime */
  2038.         mCallback(highResTime) {
  2039.           this.rid = 0;
  2040.           Promise.resolve().then(this.pClear);
  2041.           this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  2042.         }
  2043.         /** @param {FrameRequestCallback} f */
  2044.         request(f) {
  2045.           if (this.counter > 1e9) this.counter = 9;
  2046.           let cid = this.startAt + (++this.counter);
  2047.           this.funcs.set(cid, f);
  2048.           if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  2049.           return cid;
  2050.         }
  2051.         /** @param {number} cid */
  2052.         cancel(cid) {
  2053.           cid = +cid;
  2054.           if (cid > 0) {
  2055.             if (cid <= this.startAt) {
  2056.               return cancelAnimationFrame(cid);
  2057.             }
  2058.             if (this.rid > 0) {
  2059.               this.funcs.delete(cid);
  2060.               if (this.funcs.size === 0) {
  2061.                 cancelAnimationFrame(this.rid);
  2062.                 this.rid = 0;
  2063.               }
  2064.             }
  2065.           }
  2066.         }
  2067.       }
  2068.  
  2069.  
  2070.       const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2071.  
  2072.  
  2073.       let dt0 = Date.now() - 2000;
  2074.       const dateNow = () => Date.now() - dt0;
  2075.       // let lastScroll = 0;
  2076.       // let lastLShow = 0;
  2077.       let lastWheel = 0;
  2078.       let lastMouseDown = 0;
  2079.       let lastMouseUp = 0;
  2080.       let currentMouseDown = false;
  2081.       let lastTouchDown = 0;
  2082.       let lastTouchUp = 0;
  2083.       let currentTouchDown = false;
  2084.       let lastUserInteraction = 0;
  2085.  
  2086.       let scrollChatFn = null;
  2087.  
  2088.       let skipDontRender = true; // true first; false by flushActiveItems_
  2089.       let allowDontRender = null;
  2090.  
  2091.       ENABLE_DELAYED_CHAT_OCCURRENCE && (() => {
  2092.  
  2093.         document.addEventListener('animationstart', (evt) => {
  2094.  
  2095.           if (evt.animationName === 'dontRenderAnimation') {
  2096.             evt.target.classList.remove('dont-render');
  2097.             if (scrollChatFn) scrollChatFn();
  2098.           }
  2099.  
  2100.         }, true);
  2101.  
  2102.         const f = (elm) => {
  2103.           if (elm && elm.nodeType === 1) {
  2104.             if (!skipDontRender && allowDontRender === true) {
  2105.               // innerTextFixFn();
  2106.               elm.classList.add('dont-render');
  2107.             }
  2108.           }
  2109.         }
  2110.  
  2111.         Node.prototype.__appendChild931__ = function (a) {
  2112.           a = dr(a);
  2113.           if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2114.             if (a && a.nodeType === 1) f(a);
  2115.             else if (a instanceof DocumentFragment) {
  2116.               for (let n = a.firstChild; n; n = n.nextSibling) {
  2117.                 f(n);
  2118.               }
  2119.             }
  2120.           }
  2121.         }
  2122.  
  2123.         Node.prototype.__appendChild932__ = function () {
  2124.           this.__appendChild931__.apply(this, arguments);
  2125.           return Node.prototype.appendChild.apply(this, arguments);
  2126.         }
  2127.  
  2128.  
  2129.       })();
  2130.  
  2131.  
  2132.       const watchUserCSS = () => {
  2133.  
  2134.         // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2135.  
  2136.         const getElemFromWR = (nr) => {
  2137.           const n = kRef(nr);
  2138.           if (n && n.isConnected) return n;
  2139.           return null;
  2140.         }
  2141.  
  2142.         const clearContentVisibilitySizing = () => {
  2143.           Promise.resolve().then(() => {
  2144.  
  2145.             let btnShowMoreWR = mWeakRef(document.querySelector('#show-more[disabled]'));
  2146.  
  2147.             let lastVisibleItemWR = null;
  2148.             for (const elm of document.querySelectorAll('[wSr93]')) {
  2149.               if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2150.               elm.setAttribute('wSr93', '');
  2151.               // custom CSS property --wsr94 not working when attribute wSr93 removed
  2152.             }
  2153.             requestAnimationFrame(() => {
  2154.               const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2155.               if (btnShowMore) btnShowMore.click();
  2156.               else {
  2157.                 // would not work if switch it frequently
  2158.                 const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2159.                 if (lastVisibleItem) {
  2160.  
  2161.                   Promise.resolve()
  2162.                     .then(() => lastVisibleItem.scrollIntoView())
  2163.                     .then(() => lastVisibleItem.scrollIntoView(false))
  2164.                     .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2165.                     .catch(e => { }) // break the chain when method not callable
  2166.  
  2167.                 }
  2168.               }
  2169.             });
  2170.  
  2171.           });
  2172.  
  2173.         }
  2174.  
  2175.         const mutObserver = new MutationObserver((mutations) => {
  2176.           for (const mutation of mutations) {
  2177.             if ((mutation.addedNodes || 0).length >= 1) {
  2178.               for (const addedNode of mutation.addedNodes) {
  2179.                 if (addedNode.nodeName === 'STYLE') {
  2180.                   clearContentVisibilitySizing();
  2181.                   return;
  2182.                 }
  2183.               }
  2184.             }
  2185.             if ((mutation.removedNodes || 0).length >= 1) {
  2186.               for (const removedNode of mutation.removedNodes) {
  2187.                 if (removedNode.nodeName === 'STYLE') {
  2188.                   clearContentVisibilitySizing();
  2189.                   return;
  2190.                 }
  2191.               }
  2192.             }
  2193.           }
  2194.         });
  2195.  
  2196.         mutObserver.observe(document.documentElement, {
  2197.           childList: true,
  2198.           subtree: false
  2199.         });
  2200.         mutObserver.observe(document.head, {
  2201.           childList: true,
  2202.           subtree: false
  2203.         });
  2204.         mutObserver.observe(document.body, {
  2205.           childList: true,
  2206.           subtree: false
  2207.         });
  2208.  
  2209.       }
  2210.  
  2211.  
  2212.       class WillChangeController {
  2213.         constructor(itemScroller, willChangeValue) {
  2214.           this.element = itemScroller;
  2215.           this.counter = 0;
  2216.           this.active = false;
  2217.           this.willChangeValue = willChangeValue;
  2218.         }
  2219.  
  2220.         beforeOper() {
  2221.           if (!this.active) {
  2222.             this.active = true;
  2223.             this.element.style.willChange = this.willChangeValue;
  2224.           }
  2225.           this.counter++;
  2226.         }
  2227.  
  2228.         afterOper() {
  2229.           const c = this.counter;
  2230.           requestAnimationFrame(() => {
  2231.             if (c === this.counter) {
  2232.               this.active = false;
  2233.               this.element.style.willChange = '';
  2234.             }
  2235.           });
  2236.         }
  2237.  
  2238.         release() {
  2239.           const element = this.element;
  2240.           this.element = null;
  2241.           this.counter = 1e16;
  2242.           this.active = false;
  2243.           try {
  2244.             element.style.willChange = '';
  2245.           } catch (e) { }
  2246.         }
  2247.  
  2248.       }
  2249.  
  2250.  
  2251.       const { lcRendererElm, visObserver } = (() => {
  2252.  
  2253.  
  2254.  
  2255.         let lcRendererWR = null;
  2256.  
  2257.         const lcRendererElm = () => {
  2258.           let lcRenderer = kRef(lcRendererWR);
  2259.           if (!lcRenderer || !lcRenderer.isConnected) {
  2260.             lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2261.             lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2262.           }
  2263.           return lcRenderer;
  2264.         };
  2265.  
  2266.  
  2267.         let hasFirstShowMore = false;
  2268.  
  2269.         const visObserverFn = (entry) => {
  2270.  
  2271.           const target = entry.target;
  2272.           if (!target) return;
  2273.           // if(target.classList.contains('dont-render')) return;
  2274.           let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2275.           // const h = entry.boundingClientRect.height;
  2276.           /*
  2277.           if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2278.               // e.g. under fullscreen. the element created but not rendered.
  2279.               target.setAttribute('wSr93', '');
  2280.               return;
  2281.           }
  2282.           */
  2283.           if (isVisible) {
  2284.             // target.style.setProperty('--wsr94', h + 'px');
  2285.             target.setAttribute('wSr93', 'visible');
  2286.             if (nNextElem(target) === null) {
  2287.  
  2288.               // firstVisibleItemDetected = true;
  2289.               /*
  2290.                 if (dateNow() - lastScroll < 80) {
  2291.                     lastLShow = 0;
  2292.                     lastScroll = 0;
  2293.                     Promise.resolve().then(clickShowMore);
  2294.                 } else {
  2295.                     lastLShow = dateNow();
  2296.                 }
  2297.                 */
  2298.               // lastLShow = dateNow();
  2299.             } else if (!hasFirstShowMore) { // should more than one item being visible
  2300.               // implement inside visObserver to ensure there is sufficient delay
  2301.               hasFirstShowMore = true;
  2302.               requestAnimationFrame(() => {
  2303.                 // foreground page
  2304.                 // page visibly ready -> load the latest comments at initial loading
  2305.                 const lcRenderer = lcRendererElm();
  2306.                 if (lcRenderer) {
  2307.                   (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2308.                 }
  2309.               });
  2310.             }
  2311.           }
  2312.           else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2313.  
  2314.             // target.style.setProperty('--wsr94', h + 'px');
  2315.             target.setAttribute('wSr93', 'hidden');
  2316.           } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2317.  
  2318.         }
  2319.  
  2320.  
  2321.  
  2322.         const visObserver = new IntersectionObserver((entries) => {
  2323.  
  2324.           for (const entry of entries) {
  2325.  
  2326.             Promise.resolve(entry).then(visObserverFn);
  2327.  
  2328.           }
  2329.  
  2330.         }, {
  2331.           // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2332.           rootMargin: "0px",
  2333.           threshold: [0.05, 0.95],
  2334.         });
  2335.  
  2336.  
  2337.         return { lcRendererElm, visObserver }
  2338.  
  2339.  
  2340.       })();
  2341.  
  2342.       let sk35zResolveFn = null;
  2343.  
  2344.       let firstList = true;
  2345.  
  2346.       const { setupMutObserver } = (() => {
  2347.  
  2348.         const mutFn = (items) => {
  2349.           for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2350.             if (node.hasAttribute('wSr93')) break;
  2351.             node.setAttribute('wSr93', '');
  2352.             visObserver.observe(node);
  2353.           }
  2354.         }
  2355.  
  2356.         const mutObserver = new MutationObserver((mutations) => {
  2357.           const items = (mutations[0] || 0).target;
  2358.           if (!items) return;
  2359.           if (sk35zResolveFn) {
  2360.             sk35zResolveFn();
  2361.             sk35zResolveFn = null;
  2362.           }
  2363.           mutFn(items);
  2364.         });
  2365.  
  2366.         const setupMutObserver = (m2) => {
  2367.           scrollChatFn = null;
  2368.           mutObserver.disconnect();
  2369.           mutObserver.takeRecords();
  2370.           if (m2) {
  2371.             if (typeof m2.__appendChild932__ === 'function') {
  2372.               if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2373.               if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2374.             }
  2375.             mutObserver.observe(m2, {
  2376.               childList: true,
  2377.               subtree: false
  2378.             });
  2379.             mutFn(m2);
  2380.  
  2381.             const isFirstList = firstList;
  2382.             firstList = false;
  2383.  
  2384.             if (ENABLE_OVERFLOW_ANCHOR) {
  2385.  
  2386.               let items = m2;
  2387.               let addedAnchor = false;
  2388.               if (items) {
  2389.                 if (items.nextElementSibling === null) {
  2390.                   items.classList.add('no-anchor');
  2391.                   addedAnchor = true;
  2392.                   items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2393.                 }
  2394.               }
  2395.  
  2396.  
  2397.  
  2398.               if (addedAnchor) {
  2399.                 nodeParent(m2).classList.add('no-anchor'); // required
  2400.               }
  2401.  
  2402.             }
  2403.  
  2404.             // let div = document.createElement('div');
  2405.             // div.id = 'qwcc';
  2406.             // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2407.             // bufferRegion =div;
  2408.  
  2409.             // buffObserver.takeRecords();
  2410.             // buffObserver.disconnect();
  2411.             // buffObserver.observe(div,  {
  2412.             //     childList: true,
  2413.             //     subtree: false
  2414.             // })
  2415.  
  2416.             if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2417.  
  2418.               promiseForCustomYtElementsReady.then(() => {
  2419.  
  2420.                 customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2421.  
  2422.  
  2423.                   
  2424.  
  2425.                   setTimeout(() => {
  2426.  
  2427.                     /** @type {HTMLTemplateElement} */
  2428.                     let skz = document.createElement('yt-live-chat-text-message-renderer');
  2429.  
  2430.                     let cz1 = null;
  2431.  
  2432.                     if (skz && 'data' in skz && 'attached' in skz) {
  2433.  
  2434.                       const deferredZy1 = new Promise(resolve => {
  2435.  
  2436.                         skz.attached = function () {
  2437.                           cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2438.                           resolve(skz.textContent);
  2439.                         }
  2440.                         skz.detached = function () {
  2441.  
  2442.                         }
  2443.  
  2444.                       });
  2445.                       skz.id = 'sk35z';
  2446.                       skz.data = {
  2447.                         "message": {
  2448.                           "runs": [
  2449.                             {
  2450.                               "text": "em2o"
  2451.                             },
  2452.                             {
  2453.                               "emoji": {
  2454.                                 "emojiId": "cm35z",
  2455.                                 "shortcuts": [
  2456.                                   ":_s:",
  2457.                                   ":s:"
  2458.                                 ],
  2459.                                 "searchTerms": [
  2460.                                   "_s",
  2461.                                   "s"
  2462.                                 ],
  2463.                                 "image": {
  2464.                                   "thumbnails": [
  2465.                                     {
  2466.                                       "url": "data:image/webp;base64,UklGRjAB",
  2467.                                       "width": 48,
  2468.                                       "height": 48
  2469.                                     }
  2470.                                   ],
  2471.                                   "accessibility": {
  2472.                                     "accessibilityData": {
  2473.                                       "label": "s"
  2474.                                     }
  2475.                                   }
  2476.                                 },
  2477.                                 "isCustomEmoji": true
  2478.                               }
  2479.                             },
  2480.                             {
  2481.                               "text": "ji"
  2482.                             }
  2483.                           ]
  2484.                         },
  2485.                         "authorName": {
  2486.                           "simpleText": "N"
  2487.                         },
  2488.                         "authorPhoto": {
  2489.                           "thumbnails": [
  2490.                             {
  2491.                               "url": "data:image/webp;base64,UklGRjAB",
  2492.                               "width": 64,
  2493.                               "height": 64
  2494.                             }
  2495.                           ]
  2496.                         },
  2497.                         "contextMenuEndpoint": {
  2498.                           "commandMetadata": {
  2499.                             "webCommandMetadata": {
  2500.                               "ignoreNavigation": true
  2501.                             }
  2502.                           },
  2503.                           "liveChatItemContextMenuEndpoint": {
  2504.                             "params": "123=="
  2505.                           }
  2506.                         },
  2507.                         "id": "sk35z",
  2508.                         "timestampUsec": "1232302352350000",
  2509.                         "authorBadges": [
  2510.                           {
  2511.                             "liveChatAuthorBadgeRenderer": {
  2512.                               "customThumbnail": {
  2513.                                 "thumbnails": [
  2514.                                   {
  2515.                                     "url": "data:image/webp;base64,UklGRjAB",
  2516.                                     "width": 16,
  2517.                                     "height": 16
  2518.                                   },
  2519.                                   {
  2520.                                     "url": "data:image/webp;base64,UklGRjAB",
  2521.                                     "width": 32,
  2522.                                     "height": 32
  2523.                                   }
  2524.                                 ]
  2525.                               },
  2526.                               "tooltip": "T",
  2527.                               "accessibility": {
  2528.                                 "accessibilityData": {
  2529.                                   "label": "E"
  2530.                                 }
  2531.                               }
  2532.                             }
  2533.                           }
  2534.                         ],
  2535.                         "authorExternalChannelId": "A",
  2536.                         "contextMenuAccessibility": {
  2537.                           "accessibilityData": {
  2538.                             "label": "E"
  2539.                           }
  2540.                         },
  2541.                         "timestampText": {
  2542.                           "simpleText": "0:43"
  2543.                         }
  2544.                       };
  2545.  
  2546.  
  2547.                       sk35zResolveFn = null;
  2548.                       const deferredMutation = new Promise(resolve => {
  2549.                         sk35zResolveFn = resolve;
  2550.                         HTMLElement.prototype.appendChild.call(m2, skz);
  2551.                       });
  2552.  
  2553.                       Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2554.                         const [zy1, _] = res;
  2555.                         function fn() {
  2556.                           const zy2 = skz.textContent;
  2557.                           const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2558.                           if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2559.                             allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2560.                           }
  2561.                           if (allowDontRender === false) {
  2562.  
  2563.                             console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2564.                               "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2565.                               "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2566.                             );
  2567.  
  2568.                             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');
  2569.  
  2570.                             console.groupEnd();
  2571.                           } else if (allowDontRender === true) {
  2572.                             return true;
  2573.                           }
  2574.                         }
  2575.                         await new Promise(r => setTimeout(r, 1));
  2576.                         if (fn()) {
  2577.                           await new Promise(r => requestAnimationFrame(r));
  2578.                           if (fn()) {
  2579.                             skz.remove();
  2580.                             skz.textContent = '';
  2581.                             console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #11ad44; color: #102624; padding: 2px 4px');
  2582.                           }
  2583.                         }
  2584.                       });
  2585.  
  2586.                     }
  2587.  
  2588.                   }, 1);
  2589.  
  2590.                 })
  2591.  
  2592.               })
  2593.  
  2594.             }
  2595.  
  2596.  
  2597.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2598.  
  2599.               (() => {
  2600.  
  2601.                 const tag = 'yt-iframed-player-events-relay'
  2602.                 const dummy = document.createElement(tag);
  2603.  
  2604.                 const cProto = getProto(dummy);
  2605.                 if (!cProto || !cProto.handlePostMessage_) {
  2606.                   console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2607.                   return;
  2608.                 }
  2609.  
  2610.                 if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2611.  
  2612.                   cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2613.  
  2614.                   cProto.handlePostMessage_ = function (a) {
  2615.  
  2616.                     const da = (a || 0).data || 0;
  2617.                     if (typeof da === 'object') {
  2618.  
  2619.                       // console.log('handlePostMessage_', da)
  2620.                       const qc = da['yt-player-state-change'];
  2621.                       if (qc === 3) { // pause
  2622.                         pairForPauseResume++;
  2623.                         pairForPauseResumeM++;
  2624.                       } else if (qc === 1) { // pause
  2625.                         pairForPauseResume++;
  2626.                         pairForPauseResumeM++;
  2627.                       } else if (qc === 2) {
  2628.                         pairForPauseResume++;
  2629.                         pairForPauseResumeM++;
  2630.                       }
  2631.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  2632.                       if (pairForPauseResumeM > 1e9) pairForPauseResumeM = pairForPauseResumeM % 1e4;
  2633.                       return this.handlePostMessage66_(a);
  2634.  
  2635.                     }
  2636.  
  2637.  
  2638.                   }
  2639.  
  2640.                 }
  2641.  
  2642.  
  2643.               })();
  2644.  
  2645.             }
  2646.  
  2647.             if (isFirstList && DO_CHECK_TICKER_BACKGROUND_OVERRIDED) {
  2648.               setTimeout(() => {
  2649.                 if (!hasTimerModified) return;
  2650.                 const tickerRenderer = document.querySelector('#ticker yt-live-chat-ticker-renderer.style-scope.yt-live-chat-renderer');
  2651.                 if (!tickerRenderer) return;
  2652.  
  2653.                 const items = (tickerRenderer.$ || 0).items || 0;
  2654.                 if (!items) return;
  2655.                 const template = document.createElement('template');
  2656.                 template.innerHTML = `<yt-live-chat-ticker-dummy777-item-renderer class="style-scope yt-live-chat-ticker-renderer" whole-message-clickable=""
  2657.                 modern="" aria-label="¥1,000" role="button" tabindex="0" id="Chw777" style="width: 94px; overflow: hidden;"
  2658.                 dimmed="" [dummy777]>
  2659.                 <div id="container" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer"
  2660.                   style="--background:linear-gradient(90deg, rgba(1,2,3,1),rgba(1,2,3,1) 7%,rgba(4,0,0,1) 7%,rgba(4,0,0,1));">
  2661.                   <div id="content" class="style-scope yt-live-chat-ticker-dummy777-item-renderer" style="color: rgb(255, 255, 255);">
  2662.                     <yt-img-shadow777 id="author-photo" height="24" width="24"
  2663.                       class="style-scope yt-live-chat-ticker-dummy777-item-renderer no-transition"
  2664.                       style="background-color: transparent;" loaded=""><img id="img"
  2665.                         draggable="false" class="style-scope yt-img-shadow" alt="I" height="24" width="24"
  2666.                         src="data:image/webp;base64,UklGRjAB"></yt-img-shadow777>
  2667.               
  2668.                     <span id="text" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer">¥1,000</span>
  2669.                   </div>
  2670.                 </div>
  2671.               </yt-live-chat-ticker-dummy777-item-renderer>`;
  2672.                 const dummy777 = template.content.firstElementChild;
  2673.                 items.appendChild(dummy777);
  2674.                 Promise.resolve(dummy777).then((dummy777) => {
  2675.                   let container = HTMLElement.prototype.querySelector.call(dummy777, '#container') || 0;
  2676.                   if (container.isConnected === true) {
  2677.  
  2678.                     const evaluated = `${window.getComputedStyle(container).background}`;
  2679.  
  2680.                     container = null;
  2681.                     dummy777.remove();
  2682.                     dummy777.textContent = '';
  2683.                     dummy777 = null;
  2684.  
  2685.                     if (evaluated.indexOf('0.') < 4) {
  2686.  
  2687.                       // not fulfilling
  2688.                       // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  2689.  
  2690.                       console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2691.                         "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2692.                         "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2693.                       );
  2694.                       console.warn(`%cWarning:\n\tYou might have added a userscript or extension that also modifies the ticker background.\n\tYouTube Super Fast Chat is taking over.`, 'color: #bada55');
  2695.                       console.groupEnd();
  2696.  
  2697.                     }
  2698.                   }
  2699.                 });
  2700.  
  2701.               }, 800);
  2702.             }
  2703.  
  2704.           }
  2705.         }
  2706.  
  2707.         return { setupMutObserver };
  2708.  
  2709.  
  2710.  
  2711.       })();
  2712.  
  2713.       const setupEvents = () => {
  2714.  
  2715.  
  2716.         let scrollCount = 0;
  2717.  
  2718.         const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2719.  
  2720.  
  2721.         const delayFlushActiveItemsAfterUserActionK_ = () => {
  2722.  
  2723.           const lcRenderer = lcRendererElm();
  2724.           if (lcRenderer) {
  2725.             const cnt = (lcRenderer.inst || lcRenderer);
  2726.             if (!cnt.hasUserJustInteracted11_) return;
  2727.             if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2728.               cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2729.             }
  2730.           }
  2731.  
  2732.         }
  2733.  
  2734.         document.addEventListener('scroll', (evt) => {
  2735.           if (!evt || !evt.isTrusted) return;
  2736.           // lastScroll = dateNow();
  2737.           if (++scrollCount > 1e9) scrollCount = 9;
  2738.         }, passiveCapture); // support contain => support passive
  2739.  
  2740.         let lastScrollCount = -1;
  2741.         document.addEventListener('wheel', (evt) => {
  2742.           if (!evt || !evt.isTrusted) return;
  2743.           if (lastScrollCount === scrollCount) return;
  2744.           lastScrollCount = scrollCount;
  2745.           lastWheel = dateNow();
  2746.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2747.         }, passiveCapture); // support contain => support passive
  2748.  
  2749.         document.addEventListener('mousedown', (evt) => {
  2750.           if (!evt || !evt.isTrusted) return;
  2751.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2752.           lastMouseDown = dateNow();
  2753.           currentMouseDown = true;
  2754.           lastUserInteraction = lastMouseDown;
  2755.         }, passiveCapture);
  2756.  
  2757.         document.addEventListener('pointerdown', (evt) => {
  2758.           if (!evt || !evt.isTrusted) return;
  2759.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2760.           lastMouseDown = dateNow();
  2761.           currentMouseDown = true;
  2762.           lastUserInteraction = lastMouseDown;
  2763.         }, passiveCapture);
  2764.  
  2765.         document.addEventListener('click', (evt) => {
  2766.           if (!evt || !evt.isTrusted) return;
  2767.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2768.           lastMouseDown = lastMouseUp = dateNow();
  2769.           currentMouseDown = false;
  2770.           lastUserInteraction = lastMouseDown;
  2771.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2772.         }, passiveCapture);
  2773.  
  2774.         document.addEventListener('tap', (evt) => {
  2775.           if (!evt || !evt.isTrusted) return;
  2776.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2777.           lastMouseDown = lastMouseUp = dateNow();
  2778.           currentMouseDown = false;
  2779.           lastUserInteraction = lastMouseDown;
  2780.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2781.         }, passiveCapture);
  2782.  
  2783.  
  2784.         document.addEventListener('mouseup', (evt) => {
  2785.           if (!evt || !evt.isTrusted) return;
  2786.           if (currentMouseDown) {
  2787.             lastMouseUp = dateNow();
  2788.             currentMouseDown = false;
  2789.             lastUserInteraction = lastMouseUp;
  2790.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2791.           }
  2792.         }, passiveCapture);
  2793.  
  2794.  
  2795.         document.addEventListener('pointerup', (evt) => {
  2796.           if (!evt || !evt.isTrusted) return;
  2797.           if (currentMouseDown) {
  2798.             lastMouseUp = dateNow();
  2799.             currentMouseDown = false;
  2800.             lastUserInteraction = lastMouseUp;
  2801.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2802.           }
  2803.         }, passiveCapture);
  2804.  
  2805.         document.addEventListener('touchstart', (evt) => {
  2806.           if (!evt || !evt.isTrusted) return;
  2807.           lastTouchDown = dateNow();
  2808.           currentTouchDown = true;
  2809.           lastUserInteraction = lastTouchDown;
  2810.         }, passiveCapture);
  2811.  
  2812.         document.addEventListener('touchmove', (evt) => {
  2813.           if (!evt || !evt.isTrusted) return;
  2814.           lastTouchDown = dateNow();
  2815.           currentTouchDown = true;
  2816.           lastUserInteraction = lastTouchDown;
  2817.         }, passiveCapture);
  2818.  
  2819.         document.addEventListener('touchend', (evt) => {
  2820.           if (!evt || !evt.isTrusted) return;
  2821.           if (currentTouchDown) {
  2822.             lastTouchUp = dateNow();
  2823.             currentTouchDown = false;
  2824.             lastUserInteraction = lastTouchUp;
  2825.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2826.           }
  2827.         }, passiveCapture);
  2828.  
  2829.         document.addEventListener('touchcancel', (evt) => {
  2830.           if (!evt || !evt.isTrusted) return;
  2831.           if (currentTouchDown) {
  2832.             lastTouchUp = dateNow();
  2833.             currentTouchDown = false;
  2834.             lastUserInteraction = lastTouchUp;
  2835.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2836.           }
  2837.         }, passiveCapture);
  2838.  
  2839.  
  2840.       }
  2841.  
  2842.  
  2843.       const onRegistryReadyForDOMOperations = () => {
  2844.         let firstCheckedOnYtInit = false;
  2845.  
  2846.         const assertorURL = () => assertor(() => location.pathname.startsWith('/live_chat') && (location.search.indexOf('continuation=') > 0 || location.search.indexOf('v=') > 0));
  2847.  
  2848.         const mightFirstCheckOnYtInit = () => {
  2849.           if (firstCheckedOnYtInit) return;
  2850.           firstCheckedOnYtInit = true;
  2851.  
  2852.           if (!document.body || !document.head) return;
  2853.           if (!assertorURL()) return;
  2854.  
  2855.           addCssManaged();
  2856.  
  2857.           let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2858.           if (efsContainer && efsContainer.parentNode !== document.body) {
  2859.             document.body.appendChild(efsContainer);
  2860.           }
  2861.  
  2862.         };
  2863.  
  2864.         if (!assertorURL()) return;
  2865.         // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2866.  
  2867.         if (document.documentElement && document.head) {
  2868.           addCssManaged();
  2869.         }
  2870.         // console.log(document.body===null)
  2871.  
  2872.         customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2873.  
  2874.           const tag = "yt-live-chat-item-list-renderer"
  2875.           const dummy = document.createElement(tag);
  2876.  
  2877.           const cProto = getProto(dummy);
  2878.           if (!cProto || !cProto.attached) {
  2879.             console.warn(`proto.attached for ${tag} is unavailable.`);
  2880.             return;
  2881.           }
  2882.  
  2883.           mightFirstCheckOnYtInit();
  2884.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2885.           console.log("[Begin]");
  2886.  
  2887.           const mclp = cProto;
  2888.           try {
  2889.             assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2890.             assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2891.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2892.             assertor(() => typeof mclp.setAtBottom === 'function');
  2893.             assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2894.             assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2895.           } catch (e) { }
  2896.  
  2897.  
  2898.           try {
  2899.             assertor(() => typeof mclp.attached === 'function');
  2900.             assertor(() => typeof mclp.detached === 'function');
  2901.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2902.             assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2903.             assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2904.             assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2905.             assertor(() => typeof mclp.smoothScroll_ === 'function');
  2906.             assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2907.           } catch (e) { }
  2908.  
  2909.           mclp.__intermediate_delay__ = null;
  2910.  
  2911.           let mzk = 0;
  2912.           let myk = 0;
  2913.           let mlf = 0;
  2914.           let myw = 0;
  2915.           let mzt = 0;
  2916.           let zarr = null;
  2917.           let mlg = 0;
  2918.  
  2919.           if ((mclp.clearList || 0).length === 0) {
  2920.             assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2921.             mclp.clearList66 = mclp.clearList;
  2922.             mclp.clearList = function () {
  2923.               mzk++;
  2924.               myk++;
  2925.               mlf++;
  2926.               myw++;
  2927.               mzt++;
  2928.               mlg++;
  2929.               zarr = null;
  2930.               this.__intermediate_delay__ = null;
  2931.               this.clearList66();
  2932.             };
  2933.             console.log("clearList", "OK");
  2934.           } else {
  2935.             console.log("clearList", "NG");
  2936.           }
  2937.  
  2938.  
  2939.           let onListRendererAttachedDone = false;
  2940.  
  2941.           function setList(itemOffset, items) {
  2942.  
  2943.             const isFirstTime = onListRendererAttachedDone === false;
  2944.  
  2945.             if (isFirstTime) {
  2946.               onListRendererAttachedDone = true;
  2947.               Promise.resolve().then(watchUserCSS);
  2948.               addCssManaged();
  2949.               setupEvents();
  2950.             }
  2951.  
  2952.             setupStyle(itemOffset, items);
  2953.  
  2954.             setupMutObserver(items);
  2955.           }
  2956.  
  2957.           mclp.attached419 = async function () {
  2958.  
  2959.             if (!this.isAttached) return;
  2960.  
  2961.             let maxTrial = 16;
  2962.             while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  2963.               if (--maxTrial < 0 || !this.isAttached) return;
  2964.               await new Promise(requestAnimationFrame);
  2965.             }
  2966.  
  2967.             if (this.isAttached !== true) return;
  2968.  
  2969.             if (!this.$) {
  2970.               console.warn("!this.$");
  2971.               return;
  2972.             }
  2973.             if (!this.$) return;
  2974.             /** @type {HTMLElement | null} */
  2975.             const itemScroller = this.$['item-scroller'];
  2976.             /** @type {HTMLElement | null} */
  2977.             const itemOffset = this.$['item-offset'];
  2978.             /** @type {HTMLElement | null} */
  2979.             const items = this.$['items'];
  2980.  
  2981.             if (!itemScroller || !itemOffset || !items) {
  2982.               console.warn("items.parentNode !== itemOffset");
  2983.               return;
  2984.             }
  2985.  
  2986.             if (nodeParent(items) !== itemOffset) {
  2987.  
  2988.               console.warn("items.parentNode !== itemOffset");
  2989.               return;
  2990.             }
  2991.  
  2992.  
  2993.             if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  2994.  
  2995.               console.warn("id incorrect");
  2996.               return;
  2997.             }
  2998.  
  2999.             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')
  3000.  
  3001.             if (!isTargetItems) {
  3002.               console.warn("!isTargetItems");
  3003.               return;
  3004.             }
  3005.  
  3006.             setList(itemOffset, items);
  3007.  
  3008.           }
  3009.  
  3010.           mclp.attached331 = mclp.attached;
  3011.           mclp.attached = function () {
  3012.             this.attached419 && this.attached419();
  3013.             return this.attached331();
  3014.           }
  3015.  
  3016.           mclp.detached331 = mclp.detached;
  3017.  
  3018.           mclp.detached = function () {
  3019.             setupMutObserver();
  3020.             return this.detached331();
  3021.           }
  3022.  
  3023.           const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  3024.           for (const t29 of t29s) {
  3025.             if ((t29.inst || t29).isAttached === true) {
  3026.               t29.attached419();
  3027.             }
  3028.           }
  3029.  
  3030.           if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  3031.  
  3032.             assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  3033.             assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  3034.  
  3035.             /** @type {Map<number, any>} */
  3036.             const aMap = new Map();
  3037.             let count = 6150;
  3038.             mclp.async66 = mclp.async;
  3039.             mclp.async = function (e, f) {
  3040.               // ensure the previous operation is done
  3041.               // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  3042.               const hasF = arguments.length === 2;
  3043.               const stack = new Error().stack;
  3044.               const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  3045.               if (count > 1e9) count = 6159;
  3046.               const resId = ++count;
  3047.               aMap.set(resId, e);
  3048.               (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  3049.                 const rp = aMap.get(resId);
  3050.                 if (typeof rp !== 'function') {
  3051.                   return;
  3052.                 }
  3053.                 let cancelCall = false;
  3054.                 if (isFlushAsync) {
  3055.                   if (rk < 0) {
  3056.                     cancelCall = true;
  3057.                   } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  3058.                     cancelCall = true;
  3059.                   }
  3060.                 }
  3061.                 if (cancelCall) {
  3062.                   aMap.delete(resId);
  3063.                 } else {
  3064.                   const asyncEn = function () {
  3065.                     aMap.delete(resId);
  3066.                     return rp.apply(this, arguments);
  3067.                   };
  3068.                   aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3069.                 }
  3070.               });
  3071.  
  3072.               return resId;
  3073.             }
  3074.  
  3075.             mclp.cancelAsync66 = mclp.cancelAsync;
  3076.             mclp.cancelAsync = function (resId) {
  3077.               if (resId <= 6150) {
  3078.                 this.cancelAsync66(resId);
  3079.               } else if (aMap.has(resId)) {
  3080.                 const rp = aMap.get(resId);
  3081.                 aMap.delete(resId);
  3082.                 if (typeof rp !== 'function') {
  3083.                   this.cancelAsync66(rp);
  3084.                 }
  3085.               }
  3086.             }
  3087.  
  3088.             console.log("async", "OK");
  3089.           } else {
  3090.             console.log("async", "NG");
  3091.           }
  3092.  
  3093.  
  3094.           if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3095.  
  3096.             assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3097.             mclp.showNewItems66_ = mclp.showNewItems_;
  3098.  
  3099.             mclp.showNewItems77_ = async function () {
  3100.               if (myk > 1e9) myk = 9;
  3101.               let tid = ++myk;
  3102.  
  3103.               await new Promise(requestAnimationFrame);
  3104.  
  3105.               if (tid !== myk) {
  3106.                 return;
  3107.               }
  3108.  
  3109.               const cnt = this;
  3110.  
  3111.               await Promise.resolve();
  3112.               cnt.showNewItems66_();
  3113.  
  3114.               await Promise.resolve();
  3115.  
  3116.             }
  3117.  
  3118.             mclp.showNewItems_ = function () {
  3119.  
  3120.               const cnt = this;
  3121.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3122.                 cnt.showNewItems77_().then(() => {
  3123.                   resolve();
  3124.                 });
  3125.               });
  3126.             }
  3127.  
  3128.             console.log("showNewItems_", "OK");
  3129.           } else {
  3130.             console.log("showNewItems_", "NG");
  3131.           }
  3132.  
  3133.  
  3134.           if ((mclp.flushActiveItems_ || 0).length === 0) {
  3135.  
  3136.             assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3137.  
  3138.             let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3139.  
  3140.             let contensWillChangeController = null;
  3141.  
  3142.             mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3143.  
  3144.             mclp.flushActiveItems78_ = async function (tid) {
  3145.               try {
  3146.                 if (tid !== mlf) return;
  3147.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3148.                 let logger = false;
  3149.                 const cnt = this;
  3150.                 let immd = cnt.__intermediate_delay__;
  3151.                 await new Promise(requestAnimationFrame);
  3152.  
  3153.                 if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3154.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3155.  
  3156.                 mlf++;
  3157.                 if (mlg > 1e9) mlg = 9;
  3158.                 ++mlg;
  3159.  
  3160.                 const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3161.                 const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3162.                 let changeMaxItemsToDisplay = false;
  3163.                 const activeItemsLen = this.activeItems_.length;
  3164.                 if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3165.                   logger = true;
  3166.  
  3167.                   groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3168.  
  3169.                   logger && console.log('[Begin]')
  3170.  
  3171.                   console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3172.                   if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3173.                     console.log('reduce maxitems');
  3174.                     if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3175.                       // as all the rendered chats are already "outdated"
  3176.                       // all old chats shall remove and reduced number of few chats will be rendered
  3177.                       // then restore to the original number
  3178.                       changeMaxItemsToDisplay = true;
  3179.                       this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3180.                       console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3181.                     }
  3182.                     this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3183.                     //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3184.  
  3185.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3186.                   } else {
  3187.                     this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3188.  
  3189.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3190.                   }
  3191.                 }
  3192.                 // it is found that it will render all stacked chats after switching back from background
  3193.                 // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3194.                 // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3195.  
  3196.  
  3197.                 const items = (cnt.$ || 0).items;
  3198.  
  3199.                 if (USE_WILL_CHANGE_CONTROLLER) {
  3200.                   if (contensWillChangeController && contensWillChangeController.element !== items) {
  3201.                     contensWillChangeController.release();
  3202.                     contensWillChangeController = null;
  3203.                   }
  3204.                   if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3205.                 }
  3206.                 const wcController = contensWillChangeController;
  3207.                 cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3208.                 wcController && wcController.beforeOper();
  3209.                 await Promise.resolve();
  3210.                 const acItems = cnt.activeItems_;
  3211.                 const len1 = acItems.length;
  3212.                 if (!len1) console.warn('cnt.activeItems_.length = 0');
  3213.                 let waitFor = [];
  3214.  
  3215.  
  3216.                 /** @type {Set<string>} */
  3217.                 const imageLinks = new Set();
  3218.  
  3219.                 if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3220.                   for (const item of acItems) {
  3221.                     fixLiveChatItem(item, imageLinks);
  3222.                   }
  3223.                 }
  3224.                 if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3225.                   if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3226.                   if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3227.  
  3228.                   // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3229.                   const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3230.                   // preload performs the high priority fetching.
  3231.                   // prefetch delays the chat display if the video resoruce is demanding.
  3232.  
  3233.                   if (rel) {
  3234.  
  3235.                     imageLinks.forEach(imageLink => {
  3236.                       let d = false;
  3237.                       const isEmoji = imageLink.includes('/emoji/');
  3238.                       const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3239.                       if (!pretechedSet.has(imageLink)) {
  3240.                         pretechedSet.add(imageLink);
  3241.                         d = true;
  3242.                       }
  3243.                       if (d) {
  3244.                         waitFor.push(linker(null, rel, imageLink, 'image'));
  3245.  
  3246.                       }
  3247.                     })
  3248.  
  3249.                   }
  3250.  
  3251.                 }
  3252.  
  3253.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3254.                 // console.log('ss1', Date.now())
  3255.                 if (waitFor.length > 0) {
  3256.                   await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3257.                 }
  3258.                 waitFor.length = 0;
  3259.                 waitFor = null;
  3260.                 // console.log('ss2', Date.now())
  3261.                 cnt.flushActiveItems66_();
  3262.                 skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3263.                 const len2 = cnt.activeItems_.length;
  3264.                 const bAsync = len1 !== len2;
  3265.                 await Promise.resolve();
  3266.                 if (wcController) {
  3267.                   if (bAsync) {
  3268.                     cnt.async(() => {
  3269.                       wcController.afterOper();
  3270.                     });
  3271.                   } else {
  3272.                     wcController.afterOper();
  3273.                   }
  3274.                 }
  3275.                 if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3276.                   this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3277.  
  3278.                   logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3279.                   //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3280.                 } else if (changeMaxItemsToDisplay) {
  3281.  
  3282.                   logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3283.                     maxItemsToDisplay: this.data.maxItemsToDisplay,
  3284.                     reducedMaxItemsToDisplay,
  3285.                     originalMaxItemsToDisplay: tmpMaxItemsCount
  3286.                   });
  3287.                 }
  3288.                 logger && console.log('[End]')
  3289.  
  3290.                 logger && console.groupEnd();
  3291.  
  3292.                 if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3293.  
  3294.  
  3295.                   const ff = () => {
  3296.  
  3297.                     if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3298.                     //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3299.                     if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3300.                       cnt.scrollToBottom_();
  3301.  
  3302.                       Promise.resolve().then(() => {
  3303.  
  3304.                         if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3305.                         if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3306.                       });
  3307.  
  3308.  
  3309.                     }
  3310.                   }
  3311.  
  3312.                   ff();
  3313.  
  3314.  
  3315.                   Promise.resolve().then(ff);
  3316.  
  3317.                   // requestAnimationFrame(ff);
  3318.                 } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3319.  
  3320.                   const knt = cnt;
  3321.                   if (!scrollChatFn) {
  3322.                     const cnt = knt;
  3323.                     const f = () => {
  3324.                       const itemScroller = cnt.itemScroller;
  3325.                       if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3326.                       if (!cnt.atBottom) {
  3327.                         cnt.scrollToBottom_();
  3328.                       } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3329.                         itemScroller.scrollTop = itemScroller.scrollHeight;
  3330.                       }
  3331.                     };
  3332.                     scrollChatFn = () => Promise.resolve().then(f).then(f);
  3333.                   }
  3334.  
  3335.                   if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3336.                 }
  3337.  
  3338.                 return 1;
  3339.  
  3340.  
  3341.               } catch (e) {
  3342.                 console.warn(e);
  3343.               }
  3344.             }
  3345.  
  3346.             mclp.flushActiveItems77_ = function () {
  3347.  
  3348.               return new Promise(resResolve => {
  3349.                 try {
  3350.                   const cnt = this;
  3351.                   if (mlf > 1e9) mlf = 9;
  3352.                   let tid = ++mlf;
  3353.                   const hostElement = cnt.hostElement || cnt;
  3354.                   if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3355.                   if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3356.  
  3357.                   // 4 times to maxItems to avoid frequent trimming.
  3358.                   // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3359.  
  3360.                   const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3361.                   this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3362.                   if (cnt.canScrollToBottom_()) {
  3363.                     cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3364.                       .then(() => cnt.flushActiveItems78_(tid)) // async function
  3365.                       .then((asyncResult) => {
  3366.                         resResolve(asyncResult); // either undefined or 1
  3367.                         resResolve = null;
  3368.                       }).catch((e) => {
  3369.                         console.warn(e);
  3370.                         if (resResolve) resResolve();
  3371.                       });
  3372.                   } else {
  3373.                     resResolve(2);
  3374.                     resResolve = null;
  3375.                   }
  3376.                 } catch (e) {
  3377.                   console.warn(e);
  3378.                   if (resResolve) resResolve();
  3379.                 }
  3380.  
  3381.  
  3382.               });
  3383.  
  3384.             }
  3385.  
  3386.             mclp.flushActiveItems_ = function () {
  3387.               const cnt = this;
  3388.  
  3389.               if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3390.  
  3391.               if (cnt.activeItems_.length === 0) {
  3392.                 cnt.__intermediate_delay__ = null;
  3393.                 return;
  3394.               }
  3395.  
  3396.               const cntData = ((cnt || 0).data || 0);
  3397.               if (cntData.maxItemsToDisplay944 === undefined) {
  3398.                 cntData.maxItemsToDisplay944 = null;
  3399.                 if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3400.                 cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3401.               }
  3402.  
  3403.               // ignore previous __intermediate_delay__ and create a new one
  3404.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3405.                 cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3406.                   if (rt === 1) {
  3407.                     resolve(1); // success, scroll to bottom
  3408.                     if (hasMoreMessageState === 1) {
  3409.                       hasMoreMessageState = 0;
  3410.                       const showMore = (cnt.$ || 0)['show-more'];
  3411.                       if (showMore) {
  3412.                         showMore.classList.remove('has-new-messages-miuzp');
  3413.                       }
  3414.                     }
  3415.                   }
  3416.                   else if (rt === 2) {
  3417.                     resolve(2); // success, trim
  3418.                     if (hasMoreMessageState === 0) {
  3419.                       hasMoreMessageState = 1;
  3420.                       const showMore = cnt.$['show-more'];
  3421.                       if (showMore) {
  3422.                         showMore.classList.add('has-new-messages-miuzp');
  3423.                       }
  3424.                     }
  3425.                   }
  3426.                   else resolve(-1); // skip
  3427.                 }).catch(e => {
  3428.                   console.warn(e);
  3429.                 });
  3430.               });
  3431.  
  3432.             }
  3433.             console.log("flushActiveItems_", "OK");
  3434.           } else {
  3435.             console.log("flushActiveItems_", "NG");
  3436.           }
  3437.  
  3438.           mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3439.             try {
  3440.               if (mlg > 1e9) mlg = 9;
  3441.               const tid = ++mlg;
  3442.               const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3443.               const runCond = () => this.canScrollToBottom_();
  3444.               if (!keepTrialCond()) return;
  3445.               if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3446.               await new Promise(r => setTimeout(r, 80));
  3447.               if (!keepTrialCond()) return;
  3448.               if (runCond()) return this.flushActiveItems_() | 1;
  3449.               await new Promise(requestAnimationFrame);
  3450.               if (runCond()) return this.flushActiveItems_() | 1;
  3451.             } catch (e) {
  3452.               console.warn(e);
  3453.             }
  3454.           }
  3455.  
  3456.           if ((mclp.atBottomChanged_ || 0).length === 1) {
  3457.             // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3458.             assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3459.  
  3460.             const querySelector = HTMLElement.prototype.querySelector;
  3461.             const U = (element) => ({
  3462.               querySelector: (selector) => querySelector.call(element, selector)
  3463.             });
  3464.  
  3465.             let qid = 0;
  3466.             mclp.atBottomChanged_ = function (a) {
  3467.               let tid = ++qid;
  3468.               let b = this;
  3469.               a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3470.                 if (tid !== qid) return;
  3471.                 U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3472.               }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3473.                 this.hideShowMoreAsync_ = null,
  3474.                 U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3475.             }
  3476.  
  3477.             console.log("atBottomChanged_", "OK");
  3478.           } else {
  3479.             console.log("atBottomChanged_", "NG");
  3480.           }
  3481.  
  3482.           if ((mclp.onScrollItems_ || 0).length === 1) {
  3483.  
  3484.             assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3485.             mclp.onScrollItems66_ = mclp.onScrollItems_;
  3486.             mclp.onScrollItems77_ = async function (evt) {
  3487.               if (myw > 1e9) myw = 9;
  3488.               let tid = ++myw;
  3489.  
  3490.               await new Promise(requestAnimationFrame);
  3491.  
  3492.               if (tid !== myw) {
  3493.                 return;
  3494.               }
  3495.  
  3496.               const cnt = this;
  3497.  
  3498.               await Promise.resolve();
  3499.               if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3500.                 await Promise.resolve().then(() => {
  3501.                   this.ytRendererBehavior.onScroll(evt);
  3502.                 }).then(() => {
  3503.                   if (this.canScrollToBottom_()) {
  3504.                     const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3505.                     if (hasUserJustInteracted) {
  3506.                       // only when there is an user action
  3507.                       this.setAtBottom();
  3508.                       return 1;
  3509.                     }
  3510.                   } else {
  3511.                     // no message inserting
  3512.                     this.setAtBottom();
  3513.                     return 1;
  3514.                   }
  3515.                 }).then((r) => {
  3516.  
  3517.                   if (this.activeItems_.length) {
  3518.  
  3519.                     if (this.canScrollToBottom_()) {
  3520.                       this.flushActiveItems_();
  3521.                       return 1 && r;
  3522.                     } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3523.                       // delayed due to user action
  3524.                       this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3525.                       return 0;
  3526.                     }
  3527.                   }
  3528.                 }).then((r) => {
  3529.                   if (r) {
  3530.                     // ensure setAtBottom is correctly set
  3531.                     this.setAtBottom();
  3532.                   }
  3533.                 });
  3534.               } else {
  3535.                 cnt.onScrollItems66_(evt);
  3536.               }
  3537.  
  3538.               await Promise.resolve();
  3539.  
  3540.             }
  3541.  
  3542.             mclp.onScrollItems_ = function (evt) {
  3543.  
  3544.               const cnt = this;
  3545.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3546.                 cnt.onScrollItems77_(evt).then(() => {
  3547.                   resolve();
  3548.                 });
  3549.               });
  3550.             }
  3551.             console.log("onScrollItems_", "OK");
  3552.           } else {
  3553.             console.log("onScrollItems_", "NG");
  3554.           }
  3555.  
  3556.           if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3557.  
  3558.             assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3559.             mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3560.  
  3561.             mclp.handleLiveChatActions77_ = async function (arr) {
  3562.               if (typeof (arr || 0).length !== 'number') {
  3563.                 this.handleLiveChatActions66_(arr);
  3564.                 return;
  3565.               }
  3566.               if (mzt > 1e9) mzt = 9;
  3567.               let tid = ++mzt;
  3568.  
  3569.               if (zarr === null) zarr = arr;
  3570.               else Array.prototype.push.apply(zarr, arr);
  3571.               arr = null;
  3572.  
  3573.               await new Promise(requestAnimationFrame);
  3574.  
  3575.               if (tid !== mzt || zarr === null) {
  3576.                 return;
  3577.               }
  3578.  
  3579.               const carr = zarr;
  3580.               zarr = null;
  3581.  
  3582.               await Promise.resolve();
  3583.               this.handleLiveChatActions66_(carr);
  3584.               await Promise.resolve();
  3585.  
  3586.             }
  3587.  
  3588.             mclp.handleLiveChatActions_ = function (arr) {
  3589.  
  3590.               const cnt = this;
  3591.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3592.                 cnt.handleLiveChatActions77_(arr).then(() => {
  3593.                   resolve();
  3594.                 });
  3595.               });
  3596.             }
  3597.             console.log("handleLiveChatActions_", "OK");
  3598.           } else {
  3599.             console.log("handleLiveChatActions_", "NG");
  3600.           }
  3601.  
  3602.           mclp.hasUserJustInteracted11_ = () => {
  3603.             const t = dateNow();
  3604.             return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3605.           }
  3606.  
  3607.           if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3608.  
  3609.             assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3610.  
  3611.             mclp.canScrollToBottom_ = function () {
  3612.               return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3613.             }
  3614.  
  3615.             console.log("canScrollToBottom_", "OK");
  3616.           } else {
  3617.             console.log("canScrollToBottom_", "NG");
  3618.           }
  3619.  
  3620.           if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3621.  
  3622.             mclp.isSmoothScrollEnabled_ = function () {
  3623.               return false;
  3624.             }
  3625.  
  3626.             mclp.maybeResizeScrollContainer_ = function () {
  3627.               //
  3628.             }
  3629.  
  3630.             mclp.refreshOffsetContainerHeight_ = function () {
  3631.               //
  3632.             }
  3633.  
  3634.             mclp.smoothScroll_ = function () {
  3635.               //
  3636.             }
  3637.  
  3638.             mclp.resetSmoothScroll_ = function () {
  3639.               //
  3640.             }
  3641.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3642.           } else {
  3643.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3644.           }
  3645.  
  3646.           if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3647.  
  3648.             mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3649.             mclp.handleAddChatItemAction_ = function (a) {
  3650.               try {
  3651.                 if (a && typeof a === 'object' && !('length' in a)) {
  3652.                   fixLiveChatItem(a.item, null);
  3653.                   console.assert(arguments[0] === a);
  3654.                 }
  3655.               } catch (e) { console.warn(e) }
  3656.               return this.handleAddChatItemAction66_.apply(this, arguments);
  3657.             }
  3658.  
  3659.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3660.           } else {
  3661.  
  3662.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3663.           }
  3664.  
  3665.  
  3666.           if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3667.  
  3668.             mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3669.             mclp.handleReplaceChatItemAction_ = function (a) {
  3670.               try {
  3671.                 if (a && typeof a === 'object' && !('length' in a)) {
  3672.                   fixLiveChatItem(a.replacementItem, null);
  3673.                   console.assert(arguments[0] === a);
  3674.                 }
  3675.               } catch (e) { console.warn(e) }
  3676.               return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3677.             }
  3678.  
  3679.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3680.           } else {
  3681.  
  3682.             if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3683.           }
  3684.  
  3685.           console.log("[End]");
  3686.           console.groupEnd();
  3687.  
  3688.         });
  3689.  
  3690.  
  3691.         const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3692.  
  3693.           let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3694.  
  3695.           if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3696.  
  3697.             // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3698.             let v = `${attrValue}`;
  3699.             // conside a ticker is 101px width
  3700.             // 1% = 1.01px
  3701.             // 0.2% = 0.202px
  3702.  
  3703.  
  3704.             const ratio1 = (yd.ratio * 100);
  3705.             if (ratio1 > -1) { // avoid NaN
  3706.  
  3707.               // countdownDurationMs
  3708.               // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3709.               // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3710.               // 150000 - 1%    <1% = 1.5s>
  3711.               // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3712.               // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3713.  
  3714.               // 99px * 5% = 4.95px
  3715.  
  3716.               // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3717.  
  3718.  
  3719.               // 1% Duration
  3720.  
  3721.               let ratio2 = ratio1;
  3722.  
  3723.               const ydd = yd.data;
  3724.               if (ydd) {
  3725.  
  3726.                 const d1 = ydd.durationSec;
  3727.                 const d2 = ydd.fullDurationSec;
  3728.  
  3729.                 // @ step timing [min. 0.2%]
  3730.                 let numOfSteps = 500;
  3731.                 if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3732.                   if (d2 > 400) numOfSteps = 500; // 0.2%
  3733.                   else if (d2 > 200) numOfSteps = 200; // 0.5%
  3734.                   else if (d2 > 100) numOfSteps = 100; // 1%
  3735.                   else if (d2 > 50) numOfSteps = 50; // 2%
  3736.                   else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3737.                   else numOfSteps = 20;
  3738.                 }
  3739.                 if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3740.                 if (numOfSteps < 5) numOfSteps = 5;
  3741.  
  3742.                 const rd = numOfSteps / 100.0;
  3743.  
  3744.                 ratio2 = Math.round(ratio2 * rd) / rd;
  3745.  
  3746.                 // ratio2 = Math.round(ratio2 * 5) / 5;
  3747.                 ratio2 = ratio2.toFixed(1);
  3748.                 v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3749.  
  3750.                 if (yd.__style_last__ === v) return;
  3751.                 yd.__style_last__ = v;
  3752.                 // do not consider any delay here.
  3753.                 // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3754.  
  3755.               }
  3756.             }
  3757.  
  3758.             HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3759.  
  3760.  
  3761.           } else {
  3762.             HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3763.           }
  3764.  
  3765.         };
  3766.  
  3767.  
  3768.         const fpTicker = (renderer) => {
  3769.           const cnt = renderer.inst || renderer;
  3770.           assertor(() => typeof (cnt || 0).is === 'string');
  3771.           assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3772.           const container = (cnt.$ || 0).container;
  3773.           if (container) {
  3774.             assertor(() => (container || 0).nodeType === 1);
  3775.             assertor(() => typeof container.setAttribute === 'function');
  3776.             container.setAttribute = tickerContainerSetAttribute;
  3777.           } else {
  3778.             console.warn(`"container" does not exist in ${cnt.is}`);
  3779.           }
  3780.         };
  3781.  
  3782.  
  3783.         const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3784.           "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3785.  
  3786.  
  3787.         Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3788.  
  3789.           mightFirstCheckOnYtInit();
  3790.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3791.           console.log("[Begin]");
  3792.  
  3793.           // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3794.           let isMainVideoOngoing = null;
  3795.           let mainVideoLastProgress = null;
  3796.           // << end >>
  3797.  
  3798.           for (const tag of tags) {
  3799.             const dummy = document.createElement(tag);
  3800.  
  3801.             const cProto = getProto(dummy);
  3802.             if (!cProto || !cProto.attached) {
  3803.               console.warn(`proto.attached for ${tag} is unavailable.`);
  3804.               continue;
  3805.             }
  3806.  
  3807.             cProto.attached77 = cProto.attached;
  3808.  
  3809.             cProto.attached = function () {
  3810.               fpTicker(this.hostElement || this);
  3811.               return this.attached77();
  3812.             }
  3813.  
  3814.             for (const elm of document.getElementsByTagName(tag)) {
  3815.               if ((elm || elm.inst).isAttached === true) {
  3816.                 fpTicker(elm);
  3817.               }
  3818.             }
  3819.  
  3820.  
  3821.             let rafHackState = 0;
  3822.  
  3823.             let isTimingFunctionHackable = false;
  3824.  
  3825.             let urt = 0;
  3826.  
  3827.             if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3828.  
  3829.               // console.log('startCountdown', typeof cProto.startCountdown)
  3830.               // console.log('updateTimeout', typeof cProto.updateTimeout)
  3831.               // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3832.  
  3833.               isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3834.  
  3835.             } else {
  3836.               console.log(`Skip Timing Function Modification for ${tag}`);
  3837.               continue;
  3838.             }
  3839.  
  3840.  
  3841.             if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3842.  
  3843.               // cancelable - this.rafId < isAnimationPausedChanged >
  3844.               rafHackState = 1;
  3845.  
  3846.               if (isTimingFunctionHackable) {
  3847.                 rafHackState = 2;
  3848.  
  3849.               } else {
  3850.                 rafHackState = 4;
  3851.               }
  3852.  
  3853.             }
  3854.  
  3855.             const isCSSPropertySupported = () => {
  3856.  
  3857.               if (typeof CSS !== 'object' || typeof (CSS || 0).registerProperty !== 'function') return;
  3858.               const documentElement = document.documentElement;
  3859.               if (!documentElement) {
  3860.                 console.warn('document.documentElement is not found');
  3861.                 return false;
  3862.               }
  3863.               if (`${window.getComputedStyle(documentElement).getPropertyValue('--ticker-rtime')}`.length === 0) {
  3864.                 return false;
  3865.               }
  3866.               return true;
  3867.  
  3868.             };
  3869.  
  3870.             const doAnimator = !!ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && isCSSPropertySupported();
  3871.  
  3872.             const doRAFHack = rafHackState === 2;
  3873.  
  3874.             cProto._throwOut = function () {
  3875.               this._r782 = 1;
  3876.               Promise.resolve().then(() => {
  3877.                 this.detached();
  3878.                 this.data = null;
  3879.                 this.countdownMs = 0;
  3880.                 this.lastCountdownTimeMs = null;
  3881.                 if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  3882.                 if (this.__dataEnabled === true) this.__dataEnabled = false;
  3883.                 if (this.__dataReady === true) this.__dataReady = false;
  3884.                 const hm = this.hostElement || this;
  3885.                 if (hm.parentNode) hm.remove();
  3886.                 if (hm.firstChild) hm.textContent = '';
  3887.               }).catch(e => {
  3888.                 console.warn(e);
  3889.               });
  3890.             };
  3891.  
  3892.             // cProto._checkTickerBackgroundChanged = doAnimator ? function () {
  3893.             //   if (runTickerClassName === 'run-ticker') {
  3894.             //     const container = (this.$ || 0).container || 0;
  3895.             //     if (!container) return;
  3896.             //     container.classList.add('run-ticker-test');
  3897.             //     const evaluated = `${window.getComputedStyle(container).background}`;
  3898.             //     container.classList.remove('run-ticker-test');
  3899.             //     if (evaluated.indexOf('0.') < 4) {
  3900.             //       // not fulfilling
  3901.             //       // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  3902.             //       runTickerClassName = 'run-ticker-forced';
  3903.             //       console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3904.             //         "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3905.             //         "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3906.             //       );
  3907.             //       console.warn(`%cWarning:\n\tYou might have added a userscript or extension that hacks ticker background too.\n\tYouTube Super Fast Chat will override it for you.`, 'color: #bada55');
  3908.             //       console.groupEnd();
  3909.             //     }
  3910.             //   }
  3911.             // } : null;
  3912.  
  3913.             cProto._makeAnimator = doAnimator ? function () {
  3914.               if (this._r782) return;
  3915.               // if (!this.isAttached) return;
  3916.               if (!this._runnerAE) {
  3917.                 const aElement = (this.$ || 0).container;
  3918.                 if (!aElement) return console.warn("this.$.container is undefined");
  3919.                 const da = this.data;
  3920.                 if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  3921.                 const c1 = this.colorFromDecimal(da.startBackgroundColor);
  3922.                 const c2 = this.colorFromDecimal(da.endBackgroundColor);
  3923.                 if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  3924.  
  3925.                 // if (!this.__tickerBackgroundInitialChecked__) {
  3926.                 //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  3927.                 //   console.log('__tickerBackgroundInitialChecked__')
  3928.                 //   this._checkTickerBackgroundChanged();
  3929.                 // }
  3930.  
  3931.                 aElement.style.setProperty('--ticker-c1', c1);
  3932.                 aElement.style.setProperty('--ticker-c2', c2);
  3933.                 aElement.classList.add(runTickerClassName);
  3934.                 const p = (this.countdownMs / this.countdownDurationMs) * 100;
  3935.                 // this._aeStartV = this.countdownMs;
  3936.                 // this._aeStartT = this.countdownDurationMs;
  3937.                 if (!(p >= 0 && p <= 100)) {
  3938.                   console.warn('incorrect time ratio', p);
  3939.                 } else {
  3940.                   /*
  3941.                   const u0 = p.toFixed(4) + '%';
  3942.                   this._runnerAE = animate.call(aElement,
  3943.                     [
  3944.                       { '--ticker-rtime': u0 },
  3945.                       { '--ticker-rtime': '0%' }
  3946.                     ]
  3947.                     ,
  3948.                     {
  3949.                       fill: "forwards",
  3950.                       duration: this.countdownMs,
  3951.                       easing: "linear"
  3952.                     }
  3953.                   );
  3954.                   */
  3955.  
  3956.                   let timingFn = 'linear';
  3957.  
  3958.                   const totalDuration = this.countdownDurationMs;
  3959.  
  3960.                   if (ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF === 'steps') {
  3961.  
  3962.                     // @ step timing [min. 0.2%]
  3963.                     let stepInterval = 0.2; // unit: %
  3964.                     if (totalDuration > 400000) stepInterval = 0.2;
  3965.                     else if (totalDuration > 200000) stepInterval = 0.5;
  3966.                     else if (totalDuration > 100000) stepInterval = 1;
  3967.                     else if (totalDuration > 50000) stepInterval = 2;
  3968.                     else if (totalDuration > 25000) stepInterval = 5;
  3969.                     else stepInterval = 5;
  3970.  
  3971.                     let numOfSteps = Math.round(100 / stepInterval);
  3972.  
  3973.                     if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3974.                     if (numOfSteps < 5) numOfSteps = 5;
  3975.  
  3976.                     timingFn = `steps(${numOfSteps}, end)`;
  3977.  
  3978.                   }
  3979.  
  3980.  
  3981.  
  3982.                   this._runnerAE = animate.call(aElement,
  3983.                     [
  3984.                       { '--ticker-rtime': '100%' },
  3985.                       { '--ticker-rtime': '0%' }
  3986.                     ]
  3987.                     ,
  3988.                     {
  3989.                       fill: "forwards",
  3990.                       duration: totalDuration,
  3991.                       easing: timingFn
  3992.                     }
  3993.                   );
  3994.  
  3995.                   this._runnerAE.onfinish = () => {
  3996.                     if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  3997.                       this._aeFinished();
  3998.                     }
  3999.                   }
  4000.  
  4001.                   let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  4002.                   if (bq >= 0 && bq <= totalDuration) {
  4003.  
  4004.                     this._runnerAE.currentTime = bq
  4005.                   } else {
  4006.                     console.warn('Error on setting _runnerAE.currentTime!');
  4007.                   }
  4008.  
  4009.  
  4010.                   aeConstructor = this._runnerAE.constructor; // constructor is from iframe
  4011.                   return this._runnerAE;
  4012.                 }
  4013.               } else {
  4014.                 if (!aeConstructor) return console.warn('aeConstructor is undefined');
  4015.                 // assume just time update
  4016.                 const ae = this._runnerAE;
  4017.                 if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  4018.                 if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  4019.                 let p = (this.countdownMs / this.countdownDurationMs) * 100;
  4020.                 if (!(p >= 0 && p <= 100)) {
  4021.                   console.warn('incorrect time ratio', p);
  4022.                 } else {
  4023.                   // let u0 = p.toFixed(4) + '%'
  4024.                   /*
  4025.                   ae.effect.setKeyframes([
  4026.                     { '--ticker-rtime': u0 },
  4027.                     { '--ticker-rtime': '0%' }
  4028.                   ]);
  4029.                   ae.effect.updateTiming({ duration: this.countdownMs });
  4030.                   */
  4031.                   // ae.currentTime = 0;
  4032.  
  4033.  
  4034.  
  4035.                   let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  4036.                   if (bq >= 0 && bq <= this.countdownDurationMs) {
  4037.  
  4038.                     this._runnerAE.currentTime = bq
  4039.                   } else {
  4040.                     console.warn('Error on setting _runnerAE.currentTime!');
  4041.                   }
  4042.  
  4043.  
  4044.                   ae.play();
  4045.                   return ae;
  4046.                 }
  4047.               }
  4048.             } : null;
  4049.  
  4050.             cProto._aeFinished = doAnimator ? function () {
  4051.  
  4052.               if (this._r782) return;
  4053.  
  4054.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4055.                 this._throwOut();
  4056.                 return;
  4057.               }
  4058.  
  4059.               if (doAnimator) {
  4060.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4061.  
  4062.                 let lc = window.performance.now();
  4063.                 this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4064.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4065.                 this.lastCountdownTimeMs = lc;
  4066.                 if (this.countdownMs > 10) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs); // just warning.
  4067.  
  4068.                 this.countdownMs = 0;
  4069.                 this.lastCountdownTimeMs = null;
  4070.  
  4071.                 if (this.isAttached) {
  4072.                   if (Date.now() - windowShownAt < 80) {
  4073.                     // no animation if the video page is switched from background to foreground
  4074.                     this.hostElement.style.display = 'none';
  4075.                   } else {
  4076.                     "auto" === this.hostElement.style.width && this.setContainerWidth();
  4077.                     this.slideDown();
  4078.                   }
  4079.                 }
  4080.  
  4081.  
  4082.               } else {
  4083.                 console.warn('unexpected issue')
  4084.               }
  4085.             } : null;
  4086.  
  4087.  
  4088.             if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  4089.  
  4090.               if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  4091.                 urt++;
  4092.                 assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  4093.                 cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  4094.                 cProto.handlePauseReplay = function () {
  4095.                   if (this.isAttached) {
  4096.  
  4097.                     if (pairForPauseResumeM === 0) {
  4098.                       pairForPauseResume++;
  4099.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4100.                     }
  4101.                     // console.log('handlePauseReplay');
  4102.                     // console.log('handlePauseReplay', pairForPauseResume);
  4103.                     const r = this.handlePauseReplay66.apply(this, arguments);
  4104.                     isMainVideoOngoing = false;
  4105.                     return r;
  4106.                   }
  4107.                 };
  4108.               } else {
  4109.                 console.log('Error for setting cProto.handlePauseReplay', tag)
  4110.               }
  4111.  
  4112.               if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4113.                 urt++;
  4114.                 assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4115.                 cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4116.                 cProto.handleResumeReplay = function () {
  4117.                   if (this.isAttached) {
  4118.  
  4119.                     if (pairForPauseResumeM === 0) {
  4120.                       pairForPauseResume++;
  4121.                       if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4122.                     }
  4123.                     // console.log('handleResumeReplay');
  4124.                     // console.log('handleResumeReplay', pairForPauseResume);
  4125.                     const r = this.handleResumeReplay66.apply(this, arguments);
  4126.                     isMainVideoOngoing = true;
  4127.                     return r;
  4128.  
  4129.                   }
  4130.                 };
  4131.               } else {
  4132.                 console.log('Error for setting cProto.handleResumeReplay', tag)
  4133.               }
  4134.  
  4135.               if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4136.                 urt++;
  4137.                 assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4138.                 cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4139.                 cProto.handleReplayProgress = function (a) {
  4140.                   if (this.isAttached) {
  4141.                     const p = mainVideoLastProgress;
  4142.                     mainVideoLastProgress = a;
  4143.                     if (isMainVideoOngoing === false) { // ignore isMainVideoOngoing === null ?
  4144.                       const d = a - p;
  4145.                       if (d > 0 && d < 0.28) isMainVideoOngoing = true; // timeupdate
  4146.                       // 0.28 is due to
  4147.                       //    - most browsers will fire the timeupdate event between 4 to 60 times per second
  4148.                       //    - i.e. timeupdate roughly every 15-250 milliseconds
  4149.                     }
  4150.                     let promiseResult = null;
  4151.                     if (this.isAnimationPaused) {
  4152.                       // unstable state for isMainVideoOngoing; delay required
  4153.                       // all the tickers' handleReplayProgress are executed in the same microtask
  4154.                       // execute after result returned
  4155.                       const lz1 = pairForPauseResume;
  4156.                       Promise.resolve().then(() => {
  4157.                         return promiseResult
  4158.                       }).then(() => {
  4159.  
  4160.  
  4161.                         if (isMainVideoOngoing === true && this.isAnimationPaused) {
  4162.                           const lz2 = pairForPauseResume;
  4163.                           // console.log( 10044000, lz1, lz2 , mainVideoLastProgress - a, isMainVideoOngoing  )
  4164.                           if (lz1 === lz2 && mainVideoLastProgress !== null && mainVideoLastProgress - a >= -1e-5) this.isAnimationPaused = false; // trigger isAnimationPausedChanged
  4165.                         }
  4166.  
  4167.                       });
  4168.                     }
  4169.  
  4170.                     const lq1 = pairForPauseResume;
  4171.                     promiseResult = Promise.resolve().then(() => {
  4172.                       const lq2 = pairForPauseResume;
  4173.  
  4174.                       if (lq1 === lq2) {
  4175.                         this.handleReplayProgress66(a);
  4176.                       }
  4177.  
  4178.  
  4179.                     })
  4180.  
  4181.                   }
  4182.                 };
  4183.               } else {
  4184.                 console.log('Error for setting cProto.handleReplayProgress', tag)
  4185.               }
  4186.  
  4187.             }
  4188.  
  4189.             const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4190.  
  4191.             const doTimerFnModification = (doRAFHack || doAnimator);
  4192.  
  4193.             let windowShownAt = 0;
  4194.             if (doTimerFnModification) {
  4195.  
  4196.               window.addEventListener('visibilitychange', () => {
  4197.                 if (document.visibilityState === 'visible') windowShownAt = Date.now();
  4198.                 else windowShownAt = 0;
  4199.               }, false);
  4200.  
  4201.             }
  4202.  
  4203.             cProto.startCountdown = doTimerFnModification ? function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4204.  
  4205.               // a.durationSec [s] => countdownMs [ms]
  4206.               // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4207.               // lastCountdownTimeMs => raf ongoing
  4208.               // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4209.  
  4210.               if (this._r782) return;
  4211.  
  4212.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4213.                 this._throwOut();
  4214.                 return;
  4215.               }
  4216.  
  4217.               if (doAnimator) {
  4218.                 b = void 0 === b ? 0 : b;
  4219.                 if (void 0 !== a) {
  4220.                   this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4221.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4222.                   if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4223.                     this.lastCountdownTimeMs = performance.now()
  4224.                     this.rafId = 1
  4225.                     if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4226.                     this.detlaSincePausedSecs = 0;
  4227.                     const ae = this._makeAnimator();
  4228.                     if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4229.  
  4230.                     // console.log(539, isMainVideoOngoing)
  4231.                     if (this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4232.                       // << This is mainly for [PlayBack Replay] backwards >>
  4233.                       // fix the case when the main video is paused but due to seeking the tickers are added
  4234.                       // play first then pause immediately to allow the visual effect of initial state
  4235.                       // don't forget to set the "playerProgressSec"
  4236.                       // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4237.                       this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4238.                       this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4239.                       this.detlaSincePausedSecs = 0;
  4240.                       this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4241.                     }
  4242.                   }
  4243.                 }
  4244.               } else {
  4245.                 // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4246.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4247.                 b = void 0 === b ? 0 : b;
  4248.                 void 0 !== a && (this.countdownMs = 1E3 * a,
  4249.                   this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4250.                   this.ratio = 1,
  4251.                   this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  4252.                     this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4253.               }
  4254.  
  4255.             } : cProto.startCountdown;
  4256.  
  4257.             cProto.updateTimeout = doTimerFnModification ? function (a) {
  4258.  
  4259.               if (this._r782) return;
  4260.  
  4261.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4262.                 this._throwOut();
  4263.                 return;
  4264.               }
  4265.  
  4266.               if (doAnimator) {
  4267.                 if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4268.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4269.                 if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4270.                 if (this.isAttached && this.countdownMs) {
  4271.                   this.lastCountdownTimeMs = a
  4272.                   const ae = this._makeAnimator(); // request raf
  4273.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4274.                 } else {
  4275.                   (this.lastCountdownTimeMs = null,
  4276.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4277.                       this.slideDown()));
  4278.                 }
  4279.               } else {
  4280.                 // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4281.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4282.                 this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4283.                 this.ratio = this.countdownMs / this.countdownDurationMs;
  4284.                 this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4285.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  4286.                     this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4287.                       this.slideDown()))
  4288.               }
  4289.  
  4290.             } : cProto.updateTimeout;
  4291.  
  4292.             // let ez = 0;
  4293.             cProto.isAnimationPausedChanged = doTimerFnModification ? function (a, b) {
  4294.  
  4295.               if (this._r782) return;
  4296.  
  4297.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4298.                 this._throwOut();
  4299.                 return;
  4300.               }
  4301.               let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4302.               this._forceNoDetlaSincePausedSecs783 = 0;
  4303.  
  4304.               Promise.resolve().then(() => {
  4305.  
  4306.                 if (doAnimator) {
  4307.  
  4308.                   const playState = (this._runnerAE || 0).playState;
  4309.                   if (a && playState === 'running') {
  4310.  
  4311.                   } else if (!a && playState !== 'running' && b) {
  4312.  
  4313.                   } else {
  4314.                     return;
  4315.                   }
  4316.                 }
  4317.  
  4318.                 // if (Math.abs(this.detlaSincePausedSecs) < 0.01) this.detlaSincePausedSecs = 0;
  4319.                 if (doAnimator) {
  4320.                   const pu = () => { // running -> pause
  4321.                     this._runnerAE.pause()
  4322.                     let lc = window.performance.now();
  4323.                     this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4324.                     if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4325.                     this.lastCountdownTimeMs = lc;
  4326.                   };
  4327.                   const wa = () => { // pause -> running
  4328.                     if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4329.                     a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4330.                     this.detlaSincePausedSecs = 0;
  4331.                     this.updateTimeout(a);
  4332.                     this.lastCountdownTimeMs = window.performance.now();
  4333.                   };
  4334.                   a ? (this._runnerAE && pu()) : (!a && b && wa());
  4335.                 } else {
  4336.                   // ez++;
  4337.                   // if(ez> 1e9) ez=9;
  4338.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4339.                   a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4340.                     this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4341.                       this.detlaSincePausedSecs = 0),
  4342.                     this.boundUpdateTimeout37_(a),
  4343.                     this.lastCountdownTimeMs = window.performance.now())
  4344.                 }
  4345.  
  4346.               }).catch(e => {
  4347.                 console.log(e);
  4348.               });
  4349.  
  4350.  
  4351.  
  4352.             } : cProto.isAnimationPausedChanged;
  4353.  
  4354.  
  4355.             if (doAnimator) {
  4356.  
  4357.               assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4358.  
  4359.               let dummyValueForStyleReturn = null;
  4360.  
  4361.               cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4362.               cProto.computeContainerStyle = function (a, b) {
  4363.  
  4364.                 if (this._r782) return;
  4365.  
  4366.                 if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4367.                   this._throwOut();
  4368.                   return;
  4369.                 }
  4370.  
  4371.                 const fullDurationSec = a ? a.fullDurationSec : 0;
  4372.                 if (fullDurationSec > 0 && typeof b === 'number') {
  4373.  
  4374.                   // usually zero
  4375.  
  4376.                   // let currentDuationSrc = b * fullDurationSec; // a.durationSec
  4377.  
  4378.                   // console.log(231, fullDurationSec, b, currentDuationSrc, a.durationSec);
  4379.  
  4380.                   /*
  4381.                   if (a.mdsz && typeof a.mdst) return a.mdst;
  4382.                   a.mdsz = 1;
  4383.  
  4384.  
  4385.  
  4386.                   let c1 = this.colorFromDecimal(a.startBackgroundColor);
  4387.                   let c2 = this.colorFromDecimal(a.endBackgroundColor);
  4388.  
  4389.                   let ratio = currentDuationSrc / fullDurationSec;
  4390.  
  4391.                   let m = (ratio * 100).toFixed(1);
  4392.  
  4393.  
  4394.                   let s = `--background:linear-gradient(90deg, ${c1},${c1} ${m}%,${c2} ${m}%,${c2});`
  4395.                   let ro = {
  4396.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4397.                     "implementsGoogStringTypedString": true
  4398.                   };
  4399.  
  4400.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4401.  
  4402.                   a.mdst = s;
  4403.  
  4404.                   return ro;
  4405.                   */
  4406.                 }
  4407.  
  4408.  
  4409.  
  4410.                 // return this.computeContainerStyle66.apply(this, arguments);
  4411.  
  4412.                 if (dummyValueForStyleReturn === null) {
  4413.  
  4414.                   let s = `--nx:82;`
  4415.                   let ro = {
  4416.                     "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4417.                     "implementsGoogStringTypedString": true
  4418.                   };
  4419.  
  4420.                   ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4421.  
  4422.  
  4423.                   dummyValueForStyleReturn = ro;
  4424.  
  4425.  
  4426.                 }
  4427.  
  4428.  
  4429.                 return dummyValueForStyleReturn;
  4430.  
  4431.  
  4432.               }
  4433.  
  4434.             }
  4435.  
  4436.             if (doTimerFnModification === true) hasTimerModified = true;
  4437.  
  4438.             if (!!ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF) {
  4439.               console.log('ATTEMPT_TO_REPLACE_TICKER_EASING_TO_KEF', tag, doAnimator ? 'OK' : 'NG');
  4440.             }
  4441.  
  4442.             if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4443.               console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4444.             }
  4445.  
  4446.           }
  4447.           console.log("[End]");
  4448.           console.groupEnd();
  4449.  
  4450.  
  4451.         });
  4452.  
  4453.  
  4454.         if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4455.  
  4456.  
  4457.           customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4458.  
  4459.             mightFirstCheckOnYtInit();
  4460.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4461.             console.log("[Begin]");
  4462.             (() => {
  4463.  
  4464.               const tag = "yt-live-chat-message-input-renderer"
  4465.               const dummy = document.createElement(tag);
  4466.  
  4467.               const cProto = getProto(dummy);
  4468.               if (!cProto || !cProto.attached) {
  4469.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4470.                 return;
  4471.               }
  4472.  
  4473.               let doHack = false;
  4474.               if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4475.  
  4476.                 // not cancellable
  4477.                 console.log('handleTimeout', typeof cProto.handleTimeout)
  4478.                 console.log('updateTimeout', typeof cProto.updateTimeout)
  4479.  
  4480.                 doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4481.  
  4482.               }
  4483.  
  4484.               if (doHack) {
  4485.  
  4486.                 cProto.handleTimeout = function (a) {
  4487.                   console.log('cProto.handleTimeout', tag)
  4488.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4489.                   this.timeoutDurationMs = this.timeoutMs = a;
  4490.                   this.countdownRatio = 1;
  4491.                   0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4492.                 };
  4493.                 cProto.updateTimeout = function (a) {
  4494.                   console.log('cProto.updateTimeout', tag)
  4495.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4496.                   this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4497.                     this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4498.                   this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4499.                     rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4500.                 };
  4501.  
  4502.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4503.               } else {
  4504.  
  4505.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4506.               }
  4507.  
  4508.             })();
  4509.  
  4510.             console.log("[End]");
  4511.  
  4512.             console.groupEnd();
  4513.  
  4514.  
  4515.           })
  4516.  
  4517.  
  4518.         }
  4519.  
  4520.         if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4521.  
  4522.  
  4523.           customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4524.  
  4525.             mightFirstCheckOnYtInit();
  4526.             groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4527.             console.log("[Begin]");
  4528.             (() => {
  4529.  
  4530.               const tag = "yt-emoji-picker-renderer"
  4531.               const dummy = document.createElement(tag);
  4532.  
  4533.               const cProto = getProto(dummy);
  4534.               if (!cProto || !cProto.attached) {
  4535.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4536.                 return;
  4537.               }
  4538.  
  4539.               let doHack = false;
  4540.               if (typeof cProto.animateScroll_ === 'function') {
  4541.  
  4542.                 // not cancellable
  4543.                 console.log('animateScroll_', typeof cProto.animateScroll_)
  4544.  
  4545.                 doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4546.  
  4547.               }
  4548.  
  4549.               if (doHack) {
  4550.  
  4551.                 const querySelector = HTMLElement.prototype.querySelector;
  4552.                 const U = (element) => ({
  4553.                   querySelector: (selector) => querySelector.call(element, selector)
  4554.                 });
  4555.  
  4556.                 cProto.animateScroll_ = function (a) {
  4557.                   // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4558.                   if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4559.                   this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4560.                   a -= this.lastAnimationTime_;
  4561.                   200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4562.                     rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4563.                       this.animationEnd_ = this.animationStart_ = null,
  4564.                       this.lastAnimationTime_ = 0);
  4565.                   this.updateButtons_()
  4566.                 }
  4567.  
  4568.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  4569.               } else {
  4570.  
  4571.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  4572.               }
  4573.  
  4574.             })();
  4575.  
  4576.             console.log("[End]");
  4577.  
  4578.             console.groupEnd();
  4579.           });
  4580.         }
  4581.  
  4582.         if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  4583.  
  4584.  
  4585.           customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  4586.  
  4587.             mightFirstCheckOnYtInit();
  4588.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  4589.             console.log("[Begin]");
  4590.             (() => {
  4591.  
  4592.               const tag = "yt-live-chat-docked-message"
  4593.               const dummy = document.createElement(tag);
  4594.  
  4595.               const cProto = getProto(dummy);
  4596.               if (!cProto || !cProto.attached) {
  4597.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4598.                 return;
  4599.               }
  4600.  
  4601.               let doHack = false;
  4602.               if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  4603.  
  4604.                 // cancelable - this.intersectRAF <detached>
  4605.                 // yt-live-chat-docked-message
  4606.                 // boundCheckIntersections <-> checkIntersections
  4607.                 // onDockableMessagesChanged
  4608.                 //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  4609.  
  4610.                 console.log('detached', typeof cProto.detached)
  4611.                 console.log('checkIntersections', typeof cProto.checkIntersections)
  4612.                 console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  4613.  
  4614.                 doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  4615.  
  4616.               }
  4617.  
  4618.               if (doHack) {
  4619.  
  4620.                 cProto.checkIntersections = function () {
  4621.                   // console.log('cProto.checkIntersections', tag)
  4622.                   if (this.dockableMessages.length) {
  4623.                     this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  4624.                     let a = this.dockableMessages[0]
  4625.                       , b = this.hostElement.getBoundingClientRect();
  4626.                     a = a.getBoundingClientRect();
  4627.                     let c = a.top - b.top
  4628.                       , d = 8 >= c;
  4629.                     c = 8 >= c - this.hostElement.clientHeight;
  4630.                     if (d) {
  4631.                       let e;
  4632.                       for (; d;) {
  4633.                         e = this.dockableMessages.shift();
  4634.                         d = this.dockableMessages[0];
  4635.                         if (!d)
  4636.                           break;
  4637.                         d = d.getBoundingClientRect();
  4638.                         c = d.top - b.top;
  4639.                         let f = 8 >= c;
  4640.                         if (8 >= c - a.height)
  4641.                           if (f)
  4642.                             a = d;
  4643.                           else
  4644.                             return;
  4645.                         d = f
  4646.                       }
  4647.                       this.dock(e)
  4648.                     } else
  4649.                       c && this.dockedItem && this.clear()
  4650.                   } else
  4651.                     this.intersectRAF = 0
  4652.                 }
  4653.  
  4654.                 cProto.onDockableMessagesChanged = function () {
  4655.                   // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  4656.                   this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  4657.                 }
  4658.  
  4659.                 cProto.detached = function () {
  4660.                   this.intersectRAF && rafHub.cancel(this.intersectRAF)
  4661.                 }
  4662.  
  4663.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  4664.               } else {
  4665.  
  4666.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  4667.               }
  4668.  
  4669.             })();
  4670.  
  4671.             console.log("[End]");
  4672.  
  4673.             console.groupEnd();
  4674.  
  4675.           });
  4676.  
  4677.         }
  4678.  
  4679.         if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  4680.  
  4681.  
  4682.           customElements.whenDefined("yt-img-shadow").then(() => {
  4683.  
  4684.             mightFirstCheckOnYtInit();
  4685.             groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  4686.             console.log("[Begin]");
  4687.             (() => {
  4688.  
  4689.               const tag = "yt-img-shadow"
  4690.               const dummy = document.createElement(tag);
  4691.  
  4692.               const cProto = getProto(dummy);
  4693.               if (!cProto || !cProto.attached) {
  4694.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4695.                 return;
  4696.               }
  4697.  
  4698.               if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  4699.  
  4700.                 cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  4701.                 cProto.thumbnailChanged_ = function (a) {
  4702.  
  4703.                   if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  4704.                   if (!this.oldThumbnail_ && !this.thumbnail) return;
  4705.  
  4706.                   return this.thumbnailChanged66_.apply(this, arguments)
  4707.  
  4708.                 }
  4709.                 console.log("cProto.thumbnailChanged_ - OK");
  4710.  
  4711.               } else {
  4712.                 console.log("cProto.thumbnailChanged_ - NG");
  4713.  
  4714.               }
  4715.               if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  4716.  
  4717.                 cProto.setSrc66_ = cProto.setSrc_;
  4718.                 cProto.setSrc_ = function (a) {
  4719.                   if ((((this || 0).$ || 0).img || 0).src === a) return;
  4720.                   return this.setSrc66_.apply(this, arguments)
  4721.                 }
  4722.  
  4723.                 console.log("cProto.setSrc_ - OK");
  4724.               } else {
  4725.  
  4726.                 console.log("cProto.setSrc_ - NG");
  4727.               }
  4728.  
  4729.             })();
  4730.  
  4731.             console.log("[End]");
  4732.  
  4733.             console.groupEnd();
  4734.  
  4735.           });
  4736.  
  4737.         }
  4738.  
  4739.         if (FIX_THUMBNAIL_DATACHANGED) {
  4740.  
  4741.  
  4742.  
  4743.           customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  4744.  
  4745.             mightFirstCheckOnYtInit();
  4746.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  4747.             console.log("[Begin]");
  4748.             (() => {
  4749.  
  4750.               const tag = "yt-live-chat-author-badge-renderer"
  4751.               const dummy = document.createElement(tag);
  4752.  
  4753.               const cProto = getProto(dummy);
  4754.               if (!cProto || !cProto.attached) {
  4755.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4756.                 return;
  4757.               }
  4758.  
  4759.  
  4760.               if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  4761.  
  4762.  
  4763.  
  4764.                 cProto.dataChanged86 = cProto.dataChanged;
  4765.                 cProto.dataChanged = function (a) {
  4766.  
  4767.                   /*
  4768.                   
  4769.                     for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  4770.                         b.removeChild(b.firstChild);
  4771.                     if (a)
  4772.                         if (a.icon) {
  4773.                             var c = document.createElement("yt-icon");
  4774.                             "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  4775.                             c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  4776.                             b.appendChild(c)
  4777.                         } else if (a.customThumbnail) {
  4778.                             c = document.createElement("img");
  4779.                             var d;
  4780.                             (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4781.                             b.appendChild(c),
  4782.                             c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  4783.                         }
  4784.                   
  4785.                   */
  4786.  
  4787.                   const image = ((this || 0).$ || 0).image
  4788.                   if (image && a && image.firstElementChild) {
  4789.                     let exisiting = image.firstElementChild;
  4790.                     if (exisiting === image.lastElementChild) {
  4791.  
  4792.  
  4793.                       if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  4794.  
  4795.                         let c = exisiting;
  4796.                         if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  4797.                           if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  4798.                           if (c.defaultToFilled !== true) c.defaultToFilled = true;
  4799.                         } else {
  4800.                           let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  4801.                           if (c.icon !== p) c.icon = p;
  4802.                           if (c.defaultToFilled !== false) c.defaultToFilled = false;
  4803.                         }
  4804.                         return;
  4805.  
  4806.  
  4807.                       } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  4808.  
  4809.                         let c = exisiting;
  4810.                         if (a.customThumbnail.thumbnails.map(e => e.url).includes(c.src)) {
  4811.  
  4812.                           c.setAttribute("alt", this.hostElement.ariaLabel || "");
  4813.                           return;
  4814.                         }
  4815.                         /*
  4816.  
  4817.                         var d;
  4818.                         (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4819.  
  4820.  
  4821.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  4822.                           */
  4823.                       }
  4824.  
  4825.  
  4826.                     }
  4827.                   }
  4828.                   return this.dataChanged86.apply(this, arguments)
  4829.  
  4830.                 }
  4831.                 console.log("cProto.dataChanged - OK");
  4832.  
  4833.               } else {
  4834.                 assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  4835.                 console.log("cProto.dataChanged - NG");
  4836.  
  4837.               }
  4838.  
  4839.             })();
  4840.  
  4841.             console.log("[End]");
  4842.  
  4843.             console.groupEnd();
  4844.  
  4845.           });
  4846.  
  4847.  
  4848.         }
  4849.  
  4850.  
  4851.         if (FIX_TOOLTIP_DISPLAY) {
  4852.  
  4853.  
  4854.           customElements.whenDefined("tp-yt-paper-tooltip").then(() => {
  4855.  
  4856.             mightFirstCheckOnYtInit();
  4857.             groupCollapsed("YouTube Super Fast Chat", " | tp-yt-paper-tooltip hacks");
  4858.             console.log("[Begin]");
  4859.             (() => {
  4860.  
  4861.               const tag = "tp-yt-paper-tooltip"
  4862.               const dummy = document.createElement(tag);
  4863.  
  4864.               const cProto = getProto(dummy);
  4865.               if (!cProto || !cProto.attached) {
  4866.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4867.                 return;
  4868.               }
  4869.  
  4870.               if (typeof cProto.attached === 'function' && typeof cProto.detached === 'function' && cProto._readyClients && cProto._attachDom && cProto.ready && !cProto._readyClients43) {
  4871.  
  4872.                 cProto._readyClients43 = cProto._readyClients;
  4873.                 cProto._readyClients = function () {
  4874.                   let r = cProto._readyClients43.apply(this, arguments);
  4875.                   if (this.$ && this.$$ && this.$.tooltip) this.root = null; // fix this.root = null != (b = a.root) ? b : this.host
  4876.                   return r;
  4877.                 }
  4878.  
  4879.                 console.log("_readyClients - OK");
  4880.  
  4881.               } else {
  4882.                 console.log("_readyClients - NG");
  4883.  
  4884.               }
  4885.  
  4886.  
  4887.             })();
  4888.  
  4889.             console.log("[End]");
  4890.  
  4891.             console.groupEnd();
  4892.  
  4893.           });
  4894.  
  4895.  
  4896.  
  4897.         }
  4898.  
  4899.         if (FIX_CLICKING_MESSAGE_MENU_DISPLAY) {
  4900.  
  4901.  
  4902.           customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  4903.  
  4904.  
  4905.             mightFirstCheckOnYtInit();
  4906.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-text-message-renderer hacks");
  4907.             console.log("[Begin]");
  4908.             (() => {
  4909.  
  4910.               const tag = "yt-live-chat-text-message-renderer"
  4911.               const dummy = document.createElement(tag);
  4912.  
  4913.               const cProto = getProto(dummy);
  4914.               if (!cProto || !cProto.attached) {
  4915.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  4916.                 return;
  4917.               }
  4918.  
  4919.               if (typeof cProto.attached === 'function' && !cProto.attached57 && typeof cProto.detached === 'function' && !cProto.detached57) {
  4920.  
  4921.  
  4922.                 cProto.attached57 = cProto.attached;
  4923.                 let muz = 0;
  4924.                 let nsz = null;
  4925.                 cProto.mdHandler = function (evt) {
  4926.                   // console.log(evt, 1, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  4927.  
  4928.                   muz = 0;
  4929.                   if (!evt || !evt.isTrusted || !this.hasAttribute('menu-visible')) return;
  4930.                   if ((nsz = document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))) {
  4931.                     if (evt.target.closest('[menu-visible]')) {
  4932.                       muz = Date.now();
  4933.                       evt.stopImmediatePropagation();
  4934.                       evt.stopPropagation();
  4935.                     }
  4936.                   }
  4937.  
  4938.                 };
  4939.  
  4940.                 cProto.muHandler = function (evt) {
  4941.                   // console.log(evt, 7, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  4942.                   if (!evt || !evt.isTrusted || !muz) return;
  4943.                   muz = 0;
  4944.  
  4945.                   const ksz = nsz;
  4946.                   nsz = null;
  4947.  
  4948.                   if (ksz && evt.target.closest('[menu-visible]')) {
  4949.                     muz = Date.now();
  4950.                     evt.stopImmediatePropagation();
  4951.                     evt.stopPropagation();
  4952.                     document.body.click();
  4953.                   }
  4954.  
  4955.                 };
  4956.  
  4957.                 cProto.ckHandler = function (evt) {
  4958.                   // console.log(evt, 3, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  4959.  
  4960.                   if (!evt || !evt.isTrusted || !muz) return;
  4961.                   if (Date.now() - muz < 40) {
  4962.                     muz = Date.now();
  4963.                     evt.stopImmediatePropagation();
  4964.                     evt.stopPropagation();
  4965.                   }
  4966.  
  4967.                 };
  4968.                 cProto.tapHandler = function (evt) {
  4969.                   // console.log(evt, 2, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  4970.  
  4971.                   if (!evt || !evt.isTrusted || !muz) return;
  4972.                   if (Date.now() - muz < 40) {
  4973.                     muz = Date.now();
  4974.                     evt.stopImmediatePropagation();
  4975.                     evt.stopPropagation();
  4976.                   }
  4977.  
  4978.                 };
  4979.                 cProto.attached = function () {
  4980.                   const p = this.attached57();
  4981.                   const hostElement = this.hostElement || this;
  4982.                   hostElement.addEventListener('mousedown', this.mdHandler, true);
  4983.                   hostElement.addEventListener('mouseup', this.muHandler, true);
  4984.                   hostElement.addEventListener('tap', this.tapHandler, true);
  4985.                   hostElement.addEventListener('click', this.ckHandler, true);
  4986.                   return p;
  4987.                 };
  4988.  
  4989.                 cProto.detached57 = cProto.detached;
  4990.                 cProto.detached = function () {
  4991.                   const p = this.detached57();
  4992.                   const hostElement = this.hostElement || this;
  4993.                   hostElement.removeEventListener('mousedown', this.mdHandler, true);
  4994.                   hostElement.removeEventListener('mouseup', this.muHandler, true);
  4995.                   hostElement.removeEventListener('tap', this.tapHandler, true);
  4996.                   hostElement.removeEventListener('click', this.ckHandler, true);
  4997.                   return p;
  4998.                 };
  4999.                 console.log("yt-live-chat-text-message-renderer - OK");
  5000.  
  5001.               } else {
  5002.                 console.log("yt-live-chat-text-message-renderer - NG");
  5003.  
  5004.               }
  5005.  
  5006.  
  5007.             })();
  5008.  
  5009.             console.log("[End]");
  5010.  
  5011.             console.groupEnd();
  5012.  
  5013.           });
  5014.  
  5015.         }
  5016.  
  5017.  
  5018.  
  5019.       }
  5020.  
  5021.       promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  5022.  
  5023.  
  5024.     })();
  5025.  
  5026.  
  5027.   });
  5028.  
  5029. })({ IntersectionObserver });