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YouTube 超快聊天

YouTube直播聊天的终极性能提升

当前为 2023-08-17 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.21.0
  4. // @license             MIT
  5. // @name:ja             YouTube スーパーファーストチャット
  6. // @name:zh-TW          YouTube 超快聊天
  7. // @name:zh-CN          YouTube 超快聊天
  8. // @icon                https://github.com/cyfung1031/userscript-supports/raw/main/icons/super-fast-chat.png
  9. // @namespace           UserScript
  10. // @match               https://www.youtube.com/live_chat*
  11. // @match               https://www.youtube.com/live_chat_replay*
  12. // @author              CY Fung
  13. // @run-at              document-start
  14. // @grant               none
  15. // @unwrap
  16. // @allFrames           true
  17. // @inject-into         page
  18. //
  19. // @compatible          firefox Violentmonkey
  20. // @compatible          firefox Tampermonkey
  21. // @compatible          firefox FireMonkey
  22. // @compatible          chrome Violentmonkey
  23. // @compatible          chrome Tampermonkey
  24. // @compatible          opera Violentmonkey
  25. // @compatible          opera Tampermonkey
  26. // @compatible          safari Stay
  27. // @compatible          edge Violentmonkey
  28. // @compatible          edge Tampermonkey
  29. // @compatible          brave Violentmonkey
  30. // @compatible          brave Tampermonkey
  31. //
  32. // @description         Ultimate Performance Boost for YouTube Live Chats
  33. // @description:ja      YouTubeのライブチャットの究極のパフォーマンスブースト
  34. // @description:zh-TW   YouTube直播聊天的終極性能提升
  35. // @description:zh-CN   YouTube直播聊天的终极性能提升
  36. //
  37. // ==/UserScript==
  38.  
  39. ((__CONTEXT__) => {
  40.   'use strict';
  41.  
  42.   const ENABLE_REDUCED_MAXITEMS_FOR_FLUSH = true;         // TRUE to enable trimming down to 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 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 25 latest messages then incrementally added back to 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_FULL_RENDER_REQUIRED_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_PRELOAD_THUMBNAIL = true;
  94.   const ENABLE_BASE_PREFETCHING = true;
  95.  
  96.   const FIX_SETSRC_AND_THUMBNAILCHANGE_ = true;
  97.   const FIX_THUMBNAIL_DATACHANGED = true;
  98.   const REMOVE_PRELOADAVATARFORADDACTION = true;
  99.  
  100.   const FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION = true; // important [depends on <Group#I01>]
  101.   const FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT = true; // [depends on <Group#I01>]
  102.  
  103.   // =======================================================================================================
  104.  
  105.   // AUTOMAICALLY DETERMINED
  106.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;                            
  107.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;      
  108.  
  109.   // image sizing code
  110.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  111.   
  112.  
  113. //   function KC(a, b, c, d) {
  114. //     d = void 0 === d ? "width" : d;
  115. //     if (!a || !a.length)
  116. //         return null;
  117. //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  118. //         var e = window.devicePixelRatio;
  119. //         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"));
  120. //         HC = e
  121. //     } else
  122. //         HC || (HC = window.devicePixelRatio);
  123. //     e = HC;
  124. //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  125. //     if (z("kevlar_tuner_min_thumbnail_quality"))
  126. //         return a[0].url || null;
  127. //     e = a.length;
  128. //     if (z("kevlar_tuner_max_thumbnail_quality"))
  129. //         return a[e - 1].url || null;
  130. //     if (c)
  131. //         for (var h = 0; h < e; h++)
  132. //             if (0 <= a[h].url.indexOf(c))
  133. //                 return a[h].url || null;
  134. //     for (c = 0; c < e; c++)
  135. //         if (a[c][d] >= b)
  136. //             return a[c].url || null;
  137. //     for (b = e - 1; 0 < b; b--)
  138. //         if (a[b][d])
  139. //             return a[b].url || null;
  140. //     return a[0].url || null
  141. // }
  142.  
  143.   const { IntersectionObserver } = __CONTEXT__;
  144.  
  145.   /** @type {globalThis.PromiseConstructor} */
  146.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  147.  
  148.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.")
  149.  
  150.   // necessity of cssText3_smooth_transform_position to be checked.
  151.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  152.  
  153.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  154.         position: static !important;
  155.     }
  156.  
  157.   `: '';
  158.  
  159.   // fallback if dummy style fn fails
  160.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  161.  
  162.     /* optional */
  163.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  164.         height: auto !important;
  165.         min-height: unset !important;
  166.     }
  167.  
  168.     #items.style-scope.yt-live-chat-item-list-renderer {
  169.         transform: translateY(0px) !important;
  170.     }
  171.  
  172.     /* optional */
  173.  
  174.   `: '';
  175.  
  176.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  177.  
  178.     /* ------------------------------------------------------------------------------------------------------------- */
  179.  
  180.     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 {
  181.         contain: layout style;
  182.     }
  183.  
  184.     #items.style-scope.yt-live-chat-item-list-renderer {
  185.         contain: layout paint style;
  186.     }
  187.  
  188.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  189.         contain: style;
  190.     }
  191.  
  192.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  193.         contain: size style;
  194.     }
  195.  
  196.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  197.         contain: size layout paint style;
  198.     }
  199.  
  200.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  201.         contain: layout paint style;
  202.     }
  203.  
  204.     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 {
  205.         contain: layout style;
  206.     }
  207.  
  208.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  209.         contain: layout paint style;
  210.     }
  211.  
  212.     /* ------------------------------------------------------------------------------------------------------------- */
  213.  
  214.   ` : '';
  215.  
  216.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  217.  
  218.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  219.         top: 4px;
  220.         transition-property: top;
  221.         bottom: unset;
  222.     }
  223.  
  224.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  225.         top: -42px;
  226.     }
  227.  
  228.   `: '';
  229.  
  230.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  231.  
  232.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  233.         contain: layout style;
  234.     }
  235.  
  236.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  237.         overflow: visible;
  238.     }
  239.  
  240.   `: '';
  241.  
  242.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  243.  
  244.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  245.         --yt-live-chat-action-panel-top-border: none;
  246.     }
  247.  
  248.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  249.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  250.     }
  251.  
  252.     html #panel-pages.yt-live-chat-renderer {
  253.         border-top: 0;
  254.         border-bottom: 0;
  255.     }
  256.  
  257.   `: '';
  258.  
  259.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  260.  
  261.     img,
  262.     yt-img-shadow[height][width],
  263.     yt-img-shadow {
  264.         content-visibility: visible !important;
  265.     }
  266.  
  267.   `  : '';
  268.  
  269.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  270.  
  271.     /* remove YouTube constant will-change */
  272.     /* constant value will slow down the performance; default auto */
  273.  
  274.     /* www-player.css */
  275.     html .ytp-contextmenu,
  276.     html .ytp-settings-menu {
  277.         will-change: unset;
  278.     }
  279.  
  280.     /* frequently matched elements */
  281.     html .fill.yt-interaction,
  282.     html .stroke.yt-interaction,
  283.     html .yt-spec-touch-feedback-shape__fill,
  284.     html .yt-spec-touch-feedback-shape__stroke {
  285.         will-change: unset;
  286.     }
  287.  
  288.     /* live_chat_polymer.js */
  289.     /*
  290.     html .toggle-button.tp-yt-paper-toggle-button,
  291.     html #primaryProgress.tp-yt-paper-progress,
  292.     html #secondaryProgress.tp-yt-paper-progress,
  293.     html #onRadio.tp-yt-paper-radio-button,
  294.     html .fill.yt-interaction,
  295.     html .stroke.yt-interaction,
  296.     html .yt-spec-touch-feedback-shape__fill,
  297.     html .yt-spec-touch-feedback-shape__stroke {
  298.         will-change: unset;
  299.     }
  300.     */
  301.  
  302.     /* desktop_polymer_enable_wil_icons.js */
  303.     /* html .fill.yt-interaction,
  304.     html .stroke.yt-interaction, */
  305.     html tp-yt-app-header::before,
  306.     html tp-yt-iron-list,
  307.     html #items.tp-yt-iron-list > *,
  308.     html #onRadio.tp-yt-paper-radio-button,
  309.     html .toggle-button.tp-yt-paper-toggle-button,
  310.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  311.     html #items.ytd-post-multi-image-renderer,
  312.     html #items.ytd-horizontal-card-list-renderer,
  313.     html #items.yt-horizontal-list-renderer,
  314.     html #left-arrow.yt-horizontal-list-renderer,
  315.     html #right-arrow.yt-horizontal-list-renderer,
  316.     html #items.ytd-video-description-infocards-section-renderer,
  317.     html #items.ytd-video-description-music-section-renderer,
  318.     html #chips.ytd-feed-filter-chip-bar-renderer,
  319.     html #chips.yt-chip-cloud-renderer,
  320.     html #items.ytd-merch-shelf-renderer,
  321.     html #items.ytd-product-details-image-carousel-renderer,
  322.     html ytd-video-preview,
  323.     html #player-container.ytd-video-preview,
  324.     html #primaryProgress.tp-yt-paper-progress,
  325.     html #secondaryProgress.tp-yt-paper-progress,
  326.     html ytd-miniplayer[enabled] /* ,
  327.     html .yt-spec-touch-feedback-shape__fill,
  328.     html .yt-spec-touch-feedback-shape__stroke */ {
  329.         will-change: unset;
  330.     }
  331.  
  332.     /* other */
  333.     .ytp-videowall-still-info-content[class],
  334.     .ytp-suggestion-image[class] {
  335.         will-change: unset !important;
  336.     }
  337.  
  338.   ` : '';
  339.  
  340.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  341.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  342.  
  343.     elzm-fonts {
  344.         visibility: collapse;
  345.         position: fixed;
  346.         top: -10px;
  347.         left: -10px;
  348.         font-size: 10pt;
  349.         line-height: 100%;
  350.         width: 100px;
  351.         height: 100px;
  352.         transform: scale(0.1);
  353.         transform: scale(0.01);
  354.         transform: scale(0.001);
  355.         transform-origin: 0 0;
  356.         contain: strict;
  357.         display: block;
  358.  
  359.         user-select: none !important;
  360.         pointer-events: none !important;
  361.     }
  362.  
  363.     elzm-fonts[id]#elzm-fonts-yk75g {
  364.         user-select: none !important;
  365.         pointer-events: none !important;
  366.     }
  367.  
  368.     elzm-font {
  369.         visibility: collapse;
  370.         position: absolute;
  371.         line-height: 100%;
  372.         width: 100px;
  373.         height: 100px;
  374.         contain: strict;
  375.         display: block;
  376.  
  377.         user-select: none !important;
  378.         pointer-events: none !important;
  379.     }
  380.  
  381.     elzm-font::before {
  382.         visibility: collapse;
  383.         position: absolute;
  384.         line-height: 100%;
  385.         width: 100px;
  386.         height: 100px;
  387.         contain: strict;
  388.         display: block;
  389.  
  390.         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';
  391.  
  392.         user-select: none !important;
  393.         pointer-events: none !important;
  394.     }
  395.  
  396.   `: '';
  397.  
  398.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  399.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  400.         -webkit-backdrop-filter: none;
  401.         backdrop-filter: none;
  402.     }
  403.   `: '';
  404.  
  405.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  406.  
  407.     @keyframes blinker-miuzp {
  408.         0%, 60%, 100% {
  409.             opacity: 1;
  410.         }
  411.         30% {
  412.             opacity: 0.6;
  413.         }
  414.     }
  415.  
  416.     yt-icon-button#show-more.has-new-messages-miuzp {
  417.         animation: blinker-miuzp 1.74s linear infinite;      
  418.     }
  419.  
  420.   `: '';
  421.  
  422.  
  423.   const addCss = () => `
  424.  
  425.   ${cssText8_fonts_pre_render}
  426.  
  427.   ${cssText9_no_backdrop_filter_when_menu_shown}
  428.  
  429.   @supports (contain: layout paint style) {
  430.  
  431.     ${cssText5}
  432.  
  433.   }
  434.  
  435.   @supports (color: var(--general)) {
  436.  
  437.     html {
  438.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  439.     }
  440.  
  441.     ${cssText3_smooth_transform_position}
  442.  
  443.     ${cssText7c_will_change_unset}
  444.  
  445.     ${cssText7b_content_visibility_unset}
  446.  
  447.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  448.         overflow-y: scroll;
  449.         padding-right: 0;
  450.     }
  451.  
  452.     ${cssText4_smooth_transform_forced_props}
  453.  
  454.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  455.         pointer-events: none !important;
  456.     }
  457.  
  458.     #continuations, #continuations * {
  459.         contain: strict;
  460.         position: fixed;
  461.         top: 2px;
  462.         height: 1px;
  463.         width: 2px;
  464.         height: 1px;
  465.         visibility: collapse;
  466.     }
  467.  
  468.     ${cssText6b_show_more_button}
  469.  
  470.     ${cssText6d_input_panel_border}
  471.  
  472.     ${cssText6c_input_panel_overflow}
  473.  
  474.   }
  475.  
  476.  
  477.   @supports (overflow-anchor: auto) {
  478.  
  479.     .no-anchor * {
  480.         overflow-anchor: none;
  481.     }
  482.     .no-anchor > item-anchor {
  483.         overflow-anchor: auto;
  484.     }
  485.  
  486.     item-anchor {
  487.  
  488.         height:1px;
  489.         width: 100%;
  490.         transform: scaleY(0.00001);
  491.         transform-origin:0 0;
  492.         contain: strict;
  493.         opacity:0;
  494.         display:flex;
  495.         position:relative;
  496.         flex-shrink:0;
  497.         flex-grow:0;
  498.         margin-bottom:0;
  499.         overflow:hidden;
  500.         box-sizing:border-box;
  501.         visibility: visible;
  502.         content-visibility: visible;
  503.         contain-intrinsic-size: auto 1px;
  504.         pointer-events:none !important;
  505.  
  506.     }
  507.  
  508.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  509.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  510.     }
  511.  
  512.     html item-anchor {
  513.  
  514.         height: 1px;
  515.         width: 1px;
  516.         top: auto;
  517.         left: auto;
  518.         right: auto;
  519.         bottom: auto;
  520.         transform: translateY(-1px);
  521.         position: absolute;
  522.         z-index: -1;
  523.  
  524.     }
  525.  
  526.   }
  527.  
  528.   @supports (color: var(--pre-rendering)) {
  529.  
  530.     @keyframes dontRenderAnimation {
  531.         0% {
  532.             background-position-x: 3px;
  533.         }
  534.         100% {
  535.             background-position-x: 4px;
  536.         }
  537.     }
  538.  
  539.     .dont-render {
  540.         /* visibility: collapse !important; */
  541.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://gf.qytechs.cn/scripts/469878/discussions/197267 */
  542.         
  543.         transform: scale(0.01) !important;
  544.         transform: scale(0.00001) !important;
  545.         transform: scale(0.0000001) !important;
  546.         transform-origin: 0 0 !important;
  547.         z-index: -1 !important;
  548.         contain: strict !important;
  549.         box-sizing: border-box !important;
  550.  
  551.         height: 1px !important;
  552.         height: 0.1px !important;
  553.         height: 0.01px !important;
  554.         height: 0.0001px !important;
  555.         height: 0.000001px !important;
  556.  
  557.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  558.  
  559.     }
  560.  
  561.   }
  562.  
  563.   ${cssText10_show_more_blinker}
  564.  
  565.   `;
  566.  
  567.  
  568.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  569.  
  570.   // Create a unique key for the script and check if it is already running
  571.   const hkey_script = 'mchbwnoasqph';
  572.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  573.   win[hkey_script] = true;
  574.  
  575.  
  576.   function dr(s) {
  577.     // reserved for future use
  578.     return s;
  579.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  580.   }
  581.  
  582.   const getProto = (element) => {
  583.     if (element) {
  584.       const cnt = element.inst || element;
  585.       return cnt.constructor.prototype || null;
  586.     }
  587.     return null;
  588.   }
  589.  
  590.   const assertor = (f) => f() || console.assert(false, f + "");
  591.  
  592.   const fnIntegrity = (f, d) => {
  593.     if (!f || typeof f !== 'function') {
  594.       console.warn('f is not a function', f);
  595.       return;
  596.     }
  597.     let p = f + "", s = 0, j = -1, w = 0;
  598.     for (let i = 0, l = p.length; i < l; i++) {
  599.       const t = p[i];
  600.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  601.         if (j < i - 1) w++;
  602.         j = i;
  603.       } else {
  604.         s++;
  605.       }
  606.     }
  607.     let itz = `${f.length}.${s}.${w}`;
  608.     if (!d) {
  609.       return itz;
  610.     } else {
  611.       return itz === d;
  612.     }
  613.   }
  614.  
  615.  
  616.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  617.  
  618.   let ENABLE_FULL_RENDER_REQUIRED_CAPABLE = false;
  619.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  620.   if (!isContainSupport) {
  621.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  622.   } else {
  623.     ENABLE_FULL_RENDER_REQUIRED_CAPABLE = true;
  624.   }
  625.  
  626.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  627.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  628.   if (!isOverflowAnchorSupport) {
  629.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  630.   } else {
  631.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  632.   }
  633.  
  634.   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.
  635.  
  636.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  637.   const ENABLE_FULL_RENDER_REQUIRED = ENABLE_FULL_RENDER_REQUIRED_PREFERRED && ENABLE_FULL_RENDER_REQUIRED_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  638.  
  639.  
  640.   const fxOperator = (proto, propertyName) => {
  641.     let propertyDescriptorGetter = null;
  642.     try {
  643.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  644.     } catch (e) { }
  645.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  646.       try {
  647.  
  648.         return propertyDescriptorGetter.call(dr(e));
  649.       } catch (e) { }
  650.       return e[propertyName];
  651.     } : (e) => e[propertyName];
  652.   };
  653.  
  654.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  655.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  656.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  657.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  658.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  659.  
  660.   const groupCollapsed = (text1, text2) => {
  661.  
  662.     console.groupCollapsed(`%c${text1}%c${text2}`,
  663.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  664.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  665.     );
  666.   }
  667.  
  668.  
  669.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  670.   const onRegistryReady = (callback) => {
  671.     if (typeof customElements === 'undefined') {
  672.       if (!('__CE_registry' in document)) {
  673.         // https://github.com/webcomponents/polyfills/
  674.         Object.defineProperty(document, '__CE_registry', {
  675.           get() {
  676.             // return undefined
  677.           },
  678.           set(nv) {
  679.             if (typeof nv == 'object') {
  680.               delete this.__CE_registry;
  681.               this.__CE_registry = nv;
  682.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  683.             }
  684.             return true;
  685.           },
  686.           enumerable: false,
  687.           configurable: true
  688.         })
  689.       }
  690.       let eventHandler = (evt) => {
  691.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  692.         const f = callback;
  693.         callback = null;
  694.         eventHandler = null;
  695.         f();
  696.       };
  697.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  698.     } else {
  699.       callback();
  700.     }
  701.   };
  702.  
  703.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  704.  
  705.   /* globals WeakRef:false */
  706.  
  707.   /** @type {(o: Object | null) => WeakRef | null} */
  708.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  709.  
  710.   /** @type {(wr: Object | null) => Object | null} */
  711.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  712.  
  713.   const { addCssManaged } = (() => {
  714.  
  715.     const addFontPreRendering = () => {
  716.  
  717.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  718.  
  719.       let efsContainer = document.createElement('elzm-fonts');
  720.       efsContainer.id = 'elzm-fonts-yk75g'
  721.  
  722.       const arr = [];
  723.       let p = document.createElement('elzm-font');
  724.       arr.push(p);
  725.  
  726.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  727.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  728.  
  729.           p = document.createElement('elzm-font');
  730.           p.style.fontWeight = size;
  731.           arr.push(p);
  732.         }
  733.       }
  734.  
  735.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  736.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  737.  
  738.           p = document.createElement('elzm-font');
  739.           p.style.fontFamily = 'Roboto';
  740.           p.style.fontWeight = size;
  741.           arr.push(p);
  742.         }
  743.       }
  744.  
  745.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  746.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  747.  
  748.           p = document.createElement('elzm-font');
  749.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  750.           p.style.fontWeight = size;
  751.           arr.push(p);
  752.         }
  753.       }
  754.  
  755.  
  756.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  757.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  758.  
  759.           p = document.createElement('elzm-font');
  760.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  761.           p.style.fontWeight = size;
  762.           arr.push(p);
  763.         }
  764.       }
  765.  
  766.  
  767.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  768.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  769.  
  770.           p = document.createElement('elzm-font');
  771.           p.style.fontFamily = 'sans-serif';
  772.           p.style.fontWeight = size;
  773.           arr.push(p);
  774.         }
  775.       }
  776.  
  777.       console.log('number of elzm-font elements', arr.length);
  778.  
  779.       HTMLElement.prototype.append.apply(efsContainer, arr);
  780.  
  781.       (document.body || document.documentElement).appendChild(efsContainer);
  782.  
  783.  
  784.       console.log('elzm-font elements have been added to the page for rendering.');
  785.  
  786.       console.groupEnd();
  787.  
  788.     }
  789.  
  790.     let isCssAdded = false;
  791.  
  792.     function addCssElement() {
  793.       let s = document.createElement('style');
  794.       s.id = 'ewRvC';
  795.       return s;
  796.     }
  797.  
  798.     const addCssManaged = () => {
  799.       if (!isCssAdded && document.documentElement && document.head) {
  800.         isCssAdded = true;
  801.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  802.         if (ENABLE_FONT_PRE_RENDERING) {
  803.           Promise.resolve().then(addFontPreRendering)
  804.         }
  805.       }
  806.     }
  807.  
  808.     return { addCssManaged };
  809.   })();
  810.  
  811.  
  812.   const { setupStyle } = (() => {
  813.  
  814.     const sp7 = Symbol();
  815.  
  816.     const proxyHelperFn = (dummy) => ({
  817.  
  818.       get(target, prop) {
  819.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  820.       },
  821.       set(target, prop, value) {
  822.         if (!(prop in dummy)) {
  823.           target[prop] = value;
  824.         }
  825.         return true;
  826.       },
  827.       has(target, prop) {
  828.         return (prop in target);
  829.       },
  830.       deleteProperty(target, prop) {
  831.         return true;
  832.       },
  833.       ownKeys(target) {
  834.         return Object.keys(target);
  835.       },
  836.       defineProperty(target, key, descriptor) {
  837.         return Object.defineProperty(target, key, descriptor);
  838.       },
  839.       getOwnPropertyDescriptor(target, key) {
  840.         return Object.getOwnPropertyDescriptor(target, key);
  841.       },
  842.  
  843.     });
  844.  
  845.     const setupStyle = (m1, m2) => {
  846.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  847.  
  848.       const dummy1v = {
  849.         transform: '',
  850.         height: '',
  851.         minHeight: '',
  852.         paddingBottom: '',
  853.         paddingTop: ''
  854.       };
  855.  
  856.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  857.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  858.         dummy1v[k] = dummyStyleFn(k);
  859.       }
  860.  
  861.       const dummy1p = proxyHelperFn(dummy1v);
  862.       const sp1v = new Proxy(m1.style, dummy1p);
  863.       const sp2v = new Proxy(m2.style, dummy1p);
  864.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  865.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  866.       m1.removeAttribute("style");
  867.       m2.removeAttribute("style");
  868.  
  869.     }
  870.  
  871.     return { setupStyle };
  872.  
  873.   })();
  874.  
  875.  
  876.  
  877.     /*
  878.   function innerTextFixFn() {
  879.  
  880.     if (elemInnerText.status) return;
  881.     elemInnerText.status = 1;
  882.  
  883.  
  884.     const pd = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText');
  885.     if (!pd) return;
  886.     if (pd.configurable !== true) return;
  887.     const getterFn = pd.get;
  888.     if (typeof getterFn !== 'function') return;
  889.     const getterGn = function () {
  890.       const resultText = getterFn.apply(this, arguments);
  891.       if (!resultText&& elemInnerText.status === 1) {
  892.         const html = this.innerHTML;
  893.         console.log(1234, html)
  894.         if (html) {
  895.           elemInnerText.status = 2;
  896.           console.log(new Error().stack)
  897.  
  898.         }
  899.       }
  900.       return resultText;
  901.     }
  902.     let np = Object.assign({}, pd, { get: getterGn });
  903.     console.log(124, np)
  904.     Object.defineProperty(HTMLElement.prototype, 'innerText', np);
  905.     console.log(125, Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerText').get)
  906.  
  907.   }    */
  908.  
  909.  
  910.   const cleanContext = async (win) => {
  911.     const waitFn = requestAnimationFrame; // shall have been binded to window
  912.     try {
  913.       let mx = 16; // MAX TRIAL
  914.       const frameId = 'vanillajs-iframe-v1';
  915.       /** @type {HTMLIFrameElement | null} */
  916.       let frame = document.getElementById(frameId);
  917.       let removeIframeFn = null;
  918.       if (!frame) {
  919.         frame = document.createElement('iframe');
  920.         frame.id = 'vanillajs-iframe-v1';
  921.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  922.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  923.         n.appendChild(frame);
  924.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  925.         const root = document.documentElement;
  926.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  927.         removeIframeFn = (setTimeout) => {
  928.           const removeIframeOnDocumentReady = (e) => {
  929.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  930.             win = null;
  931.             setTimeout(() => {
  932.               n.remove();
  933.               n = null;
  934.             }, 200);
  935.           }
  936.           if (document.readyState !== 'loading') {
  937.             removeIframeOnDocumentReady();
  938.           } else {
  939.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  940.           }
  941.         }
  942.       }
  943.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  944.       const fc = frame.contentWindow;
  945.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  946.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  947.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  948.       for (let k in res) res[k] = res[k].bind(win); // necessary
  949.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  950.       return res;
  951.     } catch (e) {
  952.       console.warn(e);
  953.       return null;
  954.     }
  955.   };
  956.  
  957.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  958.  
  959.     const flags = () => {
  960.       try {
  961.         return ytcfg.data_.EXPERIMENT_FLAGS;
  962.       } catch (e) { }
  963.       return null;
  964.     };
  965.  
  966.     const flagsForced = () => {
  967.       try {
  968.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  969.       } catch (e) { }
  970.       return null;
  971.     };
  972.  
  973.     const flagsFn = (EXPERIMENT_FLAGS) => {
  974.  
  975.       if (!EXPERIMENT_FLAGS) return;
  976.  
  977.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  978.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  979.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  980.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  981.         }
  982.       }
  983.  
  984.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  985.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  986.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  987.       }
  988.  
  989.     };
  990.  
  991.     const uf = (EXPERIMENT_FLAGS) => {
  992.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  993.       if (EXPERIMENT_FLAGS) {
  994.         flagsFn(EXPERIMENT_FLAGS);
  995.         flagsFn(flagsForced());
  996.       }
  997.     }
  998.  
  999.     uf();
  1000.  
  1001.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1002.  
  1003.       uf();
  1004.       let cidFlags = 0;
  1005.       let kd = 0;
  1006.       new Promise(flagResolve => {
  1007.  
  1008.         const flagTimer = () => {
  1009.           const EXPERIMENT_FLAGS = flags();
  1010.           if (!EXPERIMENT_FLAGS) return;
  1011.           uf(EXPERIMENT_FLAGS);
  1012.           if (kd > 0) return;
  1013.           kd = 1;
  1014.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1015.           const moDeferred = new Promise(resolve => {
  1016.             let mo = new MutationObserver(() => {
  1017.               if (mo) {
  1018.                 mo.disconnect();
  1019.                 mo.takeRecords();
  1020.                 mo = null;
  1021.                 resolve();
  1022.               }
  1023.             });
  1024.             mo.observe(document, { subtree: true, childList: true });
  1025.           });
  1026.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1027.         };
  1028.  
  1029.         uf();
  1030.         cidFlags = setInterval(flagTimer, 1);
  1031.       }).then(() => {
  1032.         if (cidFlags > 0) clearInterval(cidFlags);
  1033.         cidFlags = 0;
  1034.         uf();
  1035.       });
  1036.  
  1037.     }
  1038.  
  1039.     return flagsFnOnInterval;
  1040.  
  1041.   })() : null;
  1042.   
  1043.  
  1044.   let kptPF = null;
  1045.   const emojiPrefetched = new Set();
  1046.   const authorPhotoPrefetched = new Set();
  1047.  
  1048.   function linker(link, rel, href, _as){
  1049.     return new Promise(resolve=>{
  1050.       if (!link) link = document.createElement('link');
  1051.       link.rel = rel;
  1052.       if (_as) link.setAttribute('as', _as);
  1053.       link.onload = function () {
  1054.         resolve({
  1055.           link: this,
  1056.           success: true
  1057.         })
  1058.         this.remove();
  1059.       };
  1060.       link.onerror = function () {
  1061.         resolve({
  1062.           link: this,
  1063.           success: false
  1064.         });
  1065.         this.remove();
  1066.       };
  1067.       link.href = href;
  1068.       document.head.appendChild(link);
  1069.       link= null;
  1070.     });
  1071.   }
  1072.  
  1073.   cleanContext(win).then(__CONTEXT__ => {
  1074.     if (!__CONTEXT__) return null;
  1075.  
  1076.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = __CONTEXT__;
  1077.  
  1078.     if(flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1079.  
  1080.     function basePrefetching() {
  1081.  
  1082.       new Promise(resolve => {
  1083.  
  1084.         if (document.readyState !== 'loading') {
  1085.           resolve();
  1086.         } else {
  1087.           win.addEventListener("DOMContentLoaded", resolve, false);
  1088.         }
  1089.  
  1090.       }).then(() => {
  1091.         const arr = [
  1092.           'https://www.youtube.com', 'https://youtube.com', 'https://googlevideo.com',
  1093.           'https://googleapis.com', 'https://www.youtube.com', 'https://accounts.youtube.com',
  1094.           'https://www.gstatic.com', 'https://ggpht.com',
  1095.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1096.         ];
  1097.         for (const h of arr) {
  1098.  
  1099.           let link = null;
  1100.           if (kptPF === null) {
  1101.             link = document.createElement('link');
  1102.             if (link.relList && link.relList.supports) {
  1103.               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)
  1104.             } else {
  1105.               kptPF = 0;
  1106.             }
  1107.             console.log('kptPF', kptPF)
  1108.           }
  1109.           if (ENABLE_BASE_PREFETCHING) {
  1110.             if (kptPF & 1) {
  1111.               linker(link, 'dns-prefetch', h);
  1112.               link = null;
  1113.             }
  1114.             if (kptPF & 2) {
  1115.               linker(link, 'preconnect', h);
  1116.               link = null;
  1117.             }
  1118.           }
  1119.  
  1120.         }
  1121.       })
  1122.  
  1123.  
  1124.     }
  1125.  
  1126.     basePrefetching();
  1127.  
  1128.     (() => {
  1129.       // data manipulation
  1130.  
  1131.       if (!DO_PARTICIPANT_LIST_HACKS) return;
  1132.  
  1133.       class Mutex {
  1134.  
  1135.         constructor() {
  1136.           this.p = Promise.resolve()
  1137.         }
  1138.  
  1139.         /**
  1140.          *  @param {(lockResolve: () => void)} f
  1141.          */
  1142.         lockWith(f) {
  1143.           this.p = this.p.then(() => new Promise(f).catch(console.warn))
  1144.         }
  1145.  
  1146.       }
  1147.  
  1148.  
  1149.       /**
  1150.  
  1151.        h.onParticipantsChanged = function() {
  1152.           this.notifyPath("participantsManager.participants")
  1153.       }
  1154.  
  1155.  
  1156.       at h.onParticipantsChanged (live_chat_polymer.js:8334:41)
  1157.       at e.<anonymous> (live_chat_polymer.js:1637:69)
  1158.       at e.Bb [as __shady_dispatchEvent] (webcomponents-sd.js:46:110)
  1159.       at k.dispatchEvent (webcomponents-sd.js:122:237)
  1160.       at mu (live_chat_polymer.js:1677:71)
  1161.       at Object.wga [as fn] (live_chat_polymer.js:1678:99)
  1162.       at a._propertiesChanged (live_chat_polymer.js:1726:426)
  1163.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1164.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1165.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1166.  
  1167.       */
  1168.  
  1169.  
  1170.       const beforeParticipantsMap = new WeakMap();
  1171.  
  1172.       const { notifyPath7081 } = (() => {
  1173.  
  1174.         const mutexParticipants = new Mutex();
  1175.  
  1176.         let uvid = 0;
  1177.         let r95dm = 0;
  1178.         let c95dm = -1;
  1179.  
  1180.         const foundMap = (base, content) => {
  1181.           /*
  1182.             let lastSearch = 0;
  1183.             let founds = base.map(baseEntry => {
  1184.               let search = content.indexOf(baseEntry, lastSearch);
  1185.               if (search < 0) return false;
  1186.               lastSearch = search + 1;
  1187.               return true;
  1188.             });
  1189.             return founds;
  1190.           */
  1191.           const contentSet = new Set(content);
  1192.           return base.map(baseEntry => contentSet.has(baseEntry));
  1193.  
  1194.         }
  1195.  
  1196.  
  1197.  
  1198.         const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1199.  
  1200.           const handler1 = {
  1201.             get(target, prop, receiver) {
  1202.               if (prop === 'object') {
  1203.                 return participants; // avoid memory leakage
  1204.               }
  1205.               if (prop === 'type') {
  1206.                 return 'splice';
  1207.               }
  1208.               return target[prop];
  1209.             }
  1210.           };
  1211.           const releaser = () => {
  1212.             participants = null;
  1213.           }
  1214.  
  1215.           let foundsForAfter = foundMap(idsAfter, idsBefore);
  1216.           let foundsForBefore = foundMap(idsBefore, idsAfter);
  1217.  
  1218.           let indexSplices = [];
  1219.           let contentUpdates = [];
  1220.           for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1221.             if (beforeParticipants[i] === participants[j]) {
  1222.               i++; j++;
  1223.             } else if (idsBefore[i] === idsAfter[j]) {
  1224.               // content changed
  1225.               contentUpdates.push({ indexI: i, indexJ: j })
  1226.               i++; j++;
  1227.             } else {
  1228.               let addedCount = 0;
  1229.               for (let q = j; q < foundsForAfter.length; q++) {
  1230.                 if (foundsForAfter[q] === false) addedCount++;
  1231.                 else break;
  1232.               }
  1233.               let removedCount = 0;
  1234.               for (let q = i; q < foundsForBefore.length; q++) {
  1235.                 if (foundsForBefore[q] === false) removedCount++;
  1236.                 else break;
  1237.               }
  1238.               if (!addedCount && !removedCount) {
  1239.                 throw 'ERROR(0xFF32): spliceIndicesFunc';
  1240.               }
  1241.               indexSplices.push(new Proxy({
  1242.                 index: j,
  1243.                 addedCount: addedCount,
  1244.                 removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1245.               }, handler1));
  1246.               i += removedCount;
  1247.               j += addedCount;
  1248.             }
  1249.           }
  1250.           foundsForBefore = null;
  1251.           foundsForAfter = null;
  1252.           idsBefore = null;
  1253.           idsAfter = null;
  1254.           beforeParticipants = null;
  1255.           return { indexSplices, contentUpdates, releaser };
  1256.  
  1257.         }
  1258.  
  1259.         /*
  1260.  
  1261.         customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1262.  
  1263.         VM63631:1 Error
  1264.         at customElements.get.notifyPath (<anonymous>:1:122)
  1265.         at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1266.         at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1267.         at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1268.         at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1269.         at ju (live_chat_polymer.js:1674:217)
  1270.         at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1271.         at b._flushProperties (live_chat_polymer.js:1597:200)
  1272.         at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1273.         at a.notifyPath (live_chat_polymer.js:1741:182)
  1274.  
  1275.         */
  1276.  
  1277.         function convertToIds(participants) {
  1278.           return participants.map(participant => {
  1279.             if (!participant || typeof participant !== 'object') {
  1280.               console.warn('Error(0xFA41): convertToIds', participant);
  1281.               return participant; // just in case
  1282.             }
  1283.             let keys = Object.keys(participant);
  1284.             // liveChatTextMessageRenderer
  1285.             // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1286.             // liveChatPaidMessageRenderer
  1287.             /*
  1288.  
  1289.               'yt-live-chat-participant-renderer' utilizes the following:
  1290.               authorName.simpleText: string
  1291.               authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1292.               authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1293.               authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1294.               authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1295.  
  1296.             */
  1297.             if (keys.length !== 1) {
  1298.               console.warn('Error(0xFA42): convertToIds', participant);
  1299.               return participant; // just in case
  1300.             }
  1301.             let key = keys[0];
  1302.             let renderer = (participant[key] || 0);
  1303.             let authorName = (renderer.authorName || 0);
  1304.             let text = `${authorName.simpleText || authorName.text}`
  1305.             let res = participant; // fallback if it is not a vaild entry
  1306.             if (typeof text !== 'string') {
  1307.               console.warn('Error(0xFA53): convertToIds', participant);
  1308.             } else {
  1309.               text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1310.               if (text.length > 1) res = text;
  1311.             }
  1312.             return res;
  1313.             // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1314.             // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1315.           });
  1316.         }
  1317.  
  1318.         const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1319.           // just update when content is changed.
  1320.           if (p1.authorName !== p2.authorName) return true;
  1321.           if (p1.authorPhoto !== p2.authorPhoto) return true;
  1322.           if (p1.authorBadges !== p2.authorBadges) return true;
  1323.           return false;
  1324.         } : (p1, p2) => {
  1325.           // keep integrity all the time.
  1326.           return p1 !== p2; // always true
  1327.         }
  1328.  
  1329.         function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1330.  
  1331.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1332.             if (path !== "participantsManager.participants") {
  1333.               return this.__notifyPath5036__.apply(this, arguments);
  1334.             }
  1335.             if (c95dm === r95dm) return;
  1336.           } else {
  1337.             const stack = new Error().stack;
  1338.             if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1339.               return this.__notifyPath5036__.apply(this, arguments);
  1340.             }
  1341.           }
  1342.  
  1343.           if (uvid > 1e8) uvid = uvid % 100;
  1344.           let tid = ++uvid;
  1345.  
  1346.           const cnt = this; // "yt-live-chat-participant-list-renderer"
  1347.           mutexParticipants.lockWith(lockResolve => {
  1348.  
  1349.             const participants00 = cnt.participantsManager.participants;
  1350.  
  1351.             if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1352.               lockResolve();
  1353.               return;
  1354.             }
  1355.  
  1356.             let doUpdate = false;
  1357.  
  1358.             if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1359.  
  1360.               if (!participants00.r94dm) {
  1361.                 participants00.r94dm = 1;
  1362.                 if (++r95dm > 1e9) r95dm = 9;
  1363.                 participants00.push = function () {
  1364.                   if (++r95dm > 1e9) r95dm = 9;
  1365.                   return Array.prototype.push.apply(this, arguments);
  1366.                 }
  1367.                 participants00.pop = function () {
  1368.                   if (++r95dm > 1e9) r95dm = 9;
  1369.                   return Array.prototype.pop.apply(this, arguments);
  1370.                 }
  1371.                 participants00.shift = function () {
  1372.                   if (++r95dm > 1e9) r95dm = 9;
  1373.                   return Array.prototype.shift.apply(this, arguments);
  1374.                 }
  1375.                 participants00.unshift = function () {
  1376.                   if (++r95dm > 1e9) r95dm = 9;
  1377.                   return Array.prototype.unshift.apply(this, arguments);
  1378.                 }
  1379.                 participants00.splice = function () {
  1380.                   if (++r95dm > 1e9) r95dm = 9;
  1381.                   return Array.prototype.splice.apply(this, arguments);
  1382.                 }
  1383.                 participants00.sort = function () {
  1384.                   if (++r95dm > 1e9) r95dm = 9;
  1385.                   return Array.prototype.sort.apply(this, arguments);
  1386.                 }
  1387.                 participants00.reverse = function () {
  1388.                   if (++r95dm > 1e9) r95dm = 9;
  1389.                   return Array.prototype.reverse.apply(this, arguments);
  1390.                 }
  1391.               }
  1392.  
  1393.               if (c95dm !== r95dm) {
  1394.                 c95dm = r95dm;
  1395.                 doUpdate = true;
  1396.               }
  1397.  
  1398.             } else {
  1399.               doUpdate = true;
  1400.             }
  1401.  
  1402.             if (!doUpdate) {
  1403.               lockResolve();
  1404.               return;
  1405.             }
  1406.  
  1407.             const participants = participants00.slice(0);
  1408.             const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1409.             beforeParticipantsMap.set(cnt, participants);
  1410.  
  1411.             const resPromise = (async () => {
  1412.  
  1413.               if (beforeParticipants.length === 0) {
  1414.                 // not error
  1415.                 return 0;
  1416.               }
  1417.  
  1418.               let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1419.  
  1420.               // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1421.               if (beforeParticipants.length !== countOfElements) {
  1422.                 // there is somewrong for the cache. - sometimes happen
  1423.                 return 0;
  1424.               }
  1425.  
  1426.               const idsBefore = convertToIds(beforeParticipants);
  1427.               const idsAfter = convertToIds(participants);
  1428.  
  1429.               let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1430.  
  1431.               let res = 1; // default 1 for no update
  1432.  
  1433.               if (indexSplices.length >= 1) {
  1434.  
  1435.  
  1436.                 // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1437.                 // let p1 = indexSplices[0].removed;
  1438.                 // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1439.  
  1440.                 /* folllow
  1441.                     a.notifyPath(c + ".splices", d);
  1442.                     a.notifyPath(c + ".length", b.length);
  1443.                 */
  1444.                 // stampDomArraySplices_
  1445.  
  1446.  
  1447.                 await new Promise(resolve => {
  1448.                   cnt.resolveForDOMRendering781 = resolve;
  1449.  
  1450.                   cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1451.                     indexSplices
  1452.                   });
  1453.                   indexSplices = null;
  1454.                   releaser();
  1455.                   releaser = null;
  1456.                   cnt.__notifyPath5036__("participantsManager.participants.length",
  1457.                     participants.length
  1458.                   );
  1459.  
  1460.                 });
  1461.  
  1462.                 await Promise.resolve(0); // play safe for the change of 'length'
  1463.                 countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1464.  
  1465.                 let wrongSize = participants.length !== countOfElements
  1466.                 if (wrongSize) {
  1467.                   console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1468.                   return 0;
  1469.                 }
  1470.  
  1471.                 res = 2 | 4;
  1472.  
  1473.               } else {
  1474.  
  1475.                 indexSplices = null;
  1476.                 releaser();
  1477.                 releaser = null;
  1478.  
  1479.                 if (participants.length !== countOfElements) {
  1480.                   // other unhandled cases
  1481.                   return 0;
  1482.                 }
  1483.  
  1484.               }
  1485.  
  1486.               // participants.length === countOfElements before contentUpdates
  1487.               if (contentUpdates.length >= 1) {
  1488.                 for (const contentUpdate of contentUpdates) {
  1489.                   let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1490.                   if (isChanged) {
  1491.                     cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1492.                     res |= 4 | 8;
  1493.                   }
  1494.                 }
  1495.               }
  1496.               contentUpdates = null;
  1497.  
  1498.               return res;
  1499.  
  1500.  
  1501.             })();
  1502.  
  1503.  
  1504.             resPromise.then(resValue => {
  1505.  
  1506.               const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1507.               isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1508.               if (resValue === 0) {
  1509.                 new Promise(resolve => {
  1510.                   cnt.resolveForDOMRendering781 = resolve;
  1511.                   isLogRequired && console.log("Full Refresh begins");
  1512.                   cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1513.                 }).then(() => {
  1514.                   isLogRequired && console.log("Full Refresh ends");
  1515.                   console.groupEnd();
  1516.                 }).then(lockResolve);
  1517.                 return;
  1518.               }
  1519.  
  1520.               const delayLockResolve = (resValue & 4) === 4;
  1521.  
  1522.               if (delayLockResolve) {
  1523.                 isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1524.                 isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1525.                 isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1526.                 isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1527.                 isLogRequired && console.groupEnd();
  1528.                 // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1529.                 // mutex lock with requestAnimationFrame can also disable participants update in background
  1530.                 requestAnimationFrame(lockResolve);
  1531.               } else {
  1532.                 lockResolve();
  1533.               }
  1534.  
  1535.             });
  1536.  
  1537.           });
  1538.  
  1539.         }
  1540.  
  1541.         return { notifyPath7081 };
  1542.  
  1543.       })();
  1544.  
  1545.  
  1546.       const onRegistryReadyForDataManipulation = () => {
  1547.  
  1548.         function dummy5035(a, b, c) { }
  1549.         function dummy411(a, b, c) { }
  1550.  
  1551.  
  1552.         if (REMOVE_PRELOADAVATARFORADDACTION) {
  1553.  
  1554.           customElements.whenDefined("yt-live-chat-renderer").then(() => {
  1555.  
  1556.             const tag = "yt-live-chat-renderer";
  1557.             const cProto = getProto(document.createElement(tag));
  1558.  
  1559.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-renderer hacks");
  1560.  
  1561.             if (typeof cProto.preloadAvatarForAddAction === 'function' && !cProto.preloadAvatarForAddAction66 && cProto.preloadAvatarForAddAction.length === 1) {
  1562.  
  1563.               cProto.preloadAvatarForAddAction66 = cProto.preloadAvatarForAddAction;
  1564.               cProto.preloadAvatarForAddAction = function () {
  1565.                 //  ===== skip  =====
  1566.  
  1567.                 // if (a.item) {
  1568.                 //   a = a.item;
  1569.                 //   var b = Object.keys(a)[0];
  1570.                 //   a = a[b];
  1571.                 //   b = KC(this.get("authorPhoto.thumbnails", a), 24);
  1572.                 //   "string" === typeof b && (this.preloadImage(b),
  1573.                 //     a.authorPhoto.webThumbnailDetailsExtensionData = {
  1574.                 //       isPreloaded: !0
  1575.                 //     })
  1576.                 // }
  1577.  
  1578.                 //  ===== skip  =====
  1579.               }
  1580.               console.log("cProto.preloadAvatarForAddAction - OK");
  1581.             } else {
  1582.               console.log("cProto.preloadAvatarForAddAction - NG");
  1583.  
  1584.             }
  1585.             console.groupEnd();
  1586.  
  1587.             // cProto.preloadImage = function (){
  1588.             //   // although we do in flushItem; just avoid being used by other usages ...
  1589.             // }
  1590.  
  1591.           });
  1592.  
  1593.         }
  1594.  
  1595.  
  1596.         customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1597.  
  1598.           if (!DO_PARTICIPANT_LIST_HACKS) return;
  1599.  
  1600.           const tag = "yt-live-chat-participant-list-renderer";
  1601.           const cProto = getProto(document.createElement(tag));
  1602.           if (!cProto || typeof cProto.attached !== 'function') {
  1603.             // for _registered, proto.attached shall exist when the element is defined.
  1604.             // for controller extraction, attached shall exist when instance creates.
  1605.             console.warn(`proto.attached for ${tag} is unavailable.`);
  1606.             return;
  1607.           }
  1608.  
  1609.  
  1610.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1611.  
  1612.           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'];
  1613.           const fgs = {};
  1614.           for (const key of fgsArr) fgs[key] = undefined;
  1615.  
  1616.           try {
  1617.             const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1618.             for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1619.           } catch (e) { }
  1620.           console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1621.  
  1622.           const canDoReplacement = (() => {
  1623.             if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1624.               console.warn('YouTube Live Chat Tamer is running.');
  1625.               return;
  1626.             }
  1627.  
  1628.             if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  1629.               console.warn('YouTube Live Chat Tamer is running.');
  1630.               return;
  1631.             }
  1632.  
  1633.             cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  1634.             cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  1635.  
  1636.             if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  1637.               console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  1638.               return;
  1639.             }
  1640.  
  1641.             if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  1642.               console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  1643.               return;
  1644.             }
  1645.  
  1646.             if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  1647.               console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  1648.               return;
  1649.             }
  1650.             return true;
  1651.           })();
  1652.  
  1653.           console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  1654.  
  1655.           assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  1656.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1657.             let fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  1658.             let s = fiRSCB.split('.');
  1659.             if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  1660.               console.log("flushRenderStamperComponentBindings_ - OK", fiRSCB);
  1661.             } else {
  1662.               console.log("flushRenderStamperComponentBindings_ - failed", fiRSCB);
  1663.             }
  1664.           } else {
  1665.             console.log("flushRenderStamperComponentBindings_ - not found");
  1666.           }
  1667.           // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  1668.  
  1669.           if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  1670.             cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  1671.             cProto.flushRenderStamperComponentBindings_ = function () {
  1672.               // console.log('flushRenderStamperComponentBindings_')
  1673.               this.flushRenderStamperComponentBindings66_();
  1674.               if (this.resolveForDOMRendering781) {
  1675.                 this.resolveForDOMRendering781();
  1676.                 this.resolveForDOMRendering781 = null;
  1677.               }
  1678.             };
  1679.           }
  1680.  
  1681.           cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  1682.             const container = this.$.participants;
  1683.             return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  1684.           }
  1685.  
  1686.           const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  1687.  
  1688.           cProto.__attached412__ = cProto.attached;
  1689.           const fpPList = function (hostElement) {
  1690.             const cnt = hostElement.inst || hostElement;
  1691.             if (beforeParticipantsMap.has(cnt)) return;
  1692.             hostElement.classList.add('n9fJ3');
  1693.  
  1694.             assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  1695.             if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  1696.               console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  1697.               return;
  1698.             }
  1699.  
  1700.             groupCollapsed("Participant List attached", "");
  1701.             // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  1702.             //   console.log(123, 'appendChild');
  1703.             //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  1704.             // }
  1705.  
  1706.             // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  1707.             //   console.log(123, 'insertBefore');
  1708.             //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  1709.             // }
  1710.  
  1711.             cnt.__notifyPath5036__ = cnt.notifyPath
  1712.             const participants = ((cnt.participantsManager || 0).participants || 0);
  1713.             assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  1714.             console.log(`initial number of participants: ${participants.length}`);
  1715.             const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  1716.             beforeParticipantsMap.set(cnt, newParticipants);
  1717.             cnt.notifyPath = notifyPath7081;
  1718.             console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  1719.             console.groupEnd();
  1720.           }
  1721.           cProto.attached = function () {
  1722.             fpPList(this.hostElement || this);
  1723.             this.__attached412__.apply(this, arguments);
  1724.           };
  1725.  
  1726.  
  1727.           if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  1728.  
  1729.             /** @type {boolean | (()=>boolean)} */
  1730.             let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  1731.             if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  1732.  
  1733.               let lastMessageDate = 0;
  1734.               cProto.stampDomArray66_ = cProto.stampDomArray_;
  1735.  
  1736.               cProto.stampDomArray_ = function (...args) {
  1737.                 if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  1738.                   if (typeof toUseMaintainStableList === 'function') {
  1739.                     toUseMaintainStableList = toUseMaintainStableList();
  1740.                   }
  1741.                   args[5] = toUseMaintainStableList;
  1742.                   let currentDate = Date.now();
  1743.                   if (currentDate - lastMessageDate > 80) {
  1744.                     lastMessageDate = currentDate;
  1745.                     console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  1746.                   }
  1747.                 }
  1748.                 return this.stampDomArray66_.apply(this, args);
  1749.               }
  1750.  
  1751.               cProto.stampDomArray_.nIegT = 1;
  1752.  
  1753.             }
  1754.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  1755.           } else {
  1756.             console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  1757.           }
  1758.  
  1759.           console.groupEnd();
  1760.  
  1761.           if (onPageElements.length >= 1) {
  1762.             for (const s of onPageElements) {
  1763.               if ((s.inst || s).isAttached === true) {
  1764.                 fpPList(s);
  1765.               }
  1766.             }
  1767.           }
  1768.  
  1769.         });
  1770.  
  1771.       };
  1772.  
  1773.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  1774.  
  1775.  
  1776.     })();
  1777.  
  1778.     IntersectionObserver && (() => {
  1779.  
  1780.       // dom manipulation
  1781.  
  1782.       class RAFHub {
  1783.         constructor() {
  1784.           /** @type {number} */
  1785.           this.startAt = 8170;
  1786.           /** @type {number} */
  1787.           this.counter = 0;
  1788.           /** @type {number} */
  1789.           this.rid = 0;
  1790.           /** @type {Map<number, FrameRequestCallback>} */
  1791.           this.funcs = new Map();
  1792.           const funcs = this.funcs;
  1793.           /** @type {FrameRequestCallback} */
  1794.           this.bCallback = this.mCallback.bind(this);
  1795.           this.pClear = () => funcs.clear();
  1796.         }
  1797.         /** @param {DOMHighResTimeStamp} highResTime */
  1798.         mCallback(highResTime) {
  1799.           this.rid = 0;
  1800.           Promise.resolve().then(this.pClear);
  1801.           this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  1802.         }
  1803.         /** @param {FrameRequestCallback} f */
  1804.         request(f) {
  1805.           if (this.counter > 1e9) this.counter = 9;
  1806.           let cid = this.startAt + (++this.counter);
  1807.           this.funcs.set(cid, f);
  1808.           if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  1809.           return cid;
  1810.         }
  1811.         /** @param {number} cid */
  1812.         cancel(cid) {
  1813.           cid = +cid;
  1814.           if (cid > 0) {
  1815.             if (cid <= this.startAt) {
  1816.               return cancelAnimationFrame(cid);
  1817.             }
  1818.             if (this.rid > 0) {
  1819.               this.funcs.delete(cid);
  1820.               if (this.funcs.size === 0) {
  1821.                 cancelAnimationFrame(this.rid);
  1822.                 this.rid = 0;
  1823.               }
  1824.             }
  1825.           }
  1826.         }
  1827.       }
  1828.  
  1829.  
  1830.       const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  1831.  
  1832.  
  1833.       let dt0 = Date.now() - 2000;
  1834.       const dateNow = () => Date.now() - dt0;
  1835.       // let lastScroll = 0;
  1836.       // let lastLShow = 0;
  1837.       let lastWheel = 0;
  1838.       let lastMouseDown = 0;
  1839.       let lastMouseUp = 0;
  1840.       let currentMouseDown = false;
  1841.       let lastTouchDown = 0;
  1842.       let lastTouchUp = 0;
  1843.       let currentTouchDown = false;
  1844.       let lastUserInteraction = 0;
  1845.  
  1846.       let scrollChatFn = null;
  1847.  
  1848.       let skipDontRender = true; // true first; false by flushActiveItems_
  1849.  
  1850.       ENABLE_FULL_RENDER_REQUIRED && (() => {
  1851.  
  1852.         document.addEventListener('animationstart', (evt) => {
  1853.  
  1854.           if (evt.animationName === 'dontRenderAnimation') {
  1855.             evt.target.classList.remove('dont-render');
  1856.             if (scrollChatFn) scrollChatFn();
  1857.           }
  1858.  
  1859.         }, true);
  1860.  
  1861.         const f = (elm) => {
  1862.           if (elm && elm.nodeType === 1) {
  1863.             if (!skipDontRender) {
  1864.               // innerTextFixFn();
  1865.               elm.classList.add('dont-render');
  1866.             }
  1867.           }
  1868.         }
  1869.  
  1870.         Node.prototype.__appendChild931__ = function (a) {
  1871.           a = dr(a);
  1872.           if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  1873.             if (a && a.nodeType === 1) f(a);
  1874.             else if (a instanceof DocumentFragment) {
  1875.               for (let n = a.firstChild; n; n = n.nextSibling) {
  1876.                 f(n);
  1877.               }
  1878.             }
  1879.           }
  1880.         }
  1881.  
  1882.         Node.prototype.__appendChild932__ = function () {
  1883.           this.__appendChild931__.apply(this, arguments);
  1884.           return Node.prototype.appendChild.apply(this, arguments);
  1885.         }
  1886.  
  1887.  
  1888.       })();
  1889.  
  1890.  
  1891.       const watchUserCSS = () => {
  1892.  
  1893.         // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  1894.  
  1895.         const getElemFromWR = (nr) => {
  1896.           const n = kRef(nr);
  1897.           if (n && n.isConnected) return n;
  1898.           return null;
  1899.         }
  1900.  
  1901.         const clearContentVisibilitySizing = () => {
  1902.           Promise.resolve().then(() => {
  1903.  
  1904.             let btnShowMoreWR = mWeakRef(document.querySelector('#show-more[disabled]'));
  1905.  
  1906.             let lastVisibleItemWR = null;
  1907.             for (const elm of document.querySelectorAll('[wSr93]')) {
  1908.               if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  1909.               elm.setAttribute('wSr93', '');
  1910.               // custom CSS property --wsr94 not working when attribute wSr93 removed
  1911.             }
  1912.             requestAnimationFrame(() => {
  1913.               const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  1914.               if (btnShowMore) btnShowMore.click();
  1915.               else {
  1916.                 // would not work if switch it frequently
  1917.                 const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  1918.                 if (lastVisibleItem) {
  1919.  
  1920.                   Promise.resolve()
  1921.                     .then(() => lastVisibleItem.scrollIntoView())
  1922.                     .then(() => lastVisibleItem.scrollIntoView(false))
  1923.                     .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  1924.                     .catch(e => { }) // break the chain when method not callable
  1925.  
  1926.                 }
  1927.               }
  1928.             });
  1929.  
  1930.           });
  1931.  
  1932.         }
  1933.  
  1934.         const mutObserver = new MutationObserver((mutations) => {
  1935.           for (const mutation of mutations) {
  1936.             if ((mutation.addedNodes || 0).length >= 1) {
  1937.               for (const addedNode of mutation.addedNodes) {
  1938.                 if (addedNode.nodeName === 'STYLE') {
  1939.                   clearContentVisibilitySizing();
  1940.                   return;
  1941.                 }
  1942.               }
  1943.             }
  1944.             if ((mutation.removedNodes || 0).length >= 1) {
  1945.               for (const removedNode of mutation.removedNodes) {
  1946.                 if (removedNode.nodeName === 'STYLE') {
  1947.                   clearContentVisibilitySizing();
  1948.                   return;
  1949.                 }
  1950.               }
  1951.             }
  1952.           }
  1953.         });
  1954.  
  1955.         mutObserver.observe(document.documentElement, {
  1956.           childList: true,
  1957.           subtree: false
  1958.         });
  1959.         mutObserver.observe(document.head, {
  1960.           childList: true,
  1961.           subtree: false
  1962.         });
  1963.         mutObserver.observe(document.body, {
  1964.           childList: true,
  1965.           subtree: false
  1966.         });
  1967.  
  1968.       }
  1969.  
  1970.  
  1971.       class WillChangeController {
  1972.         constructor(itemScroller, willChangeValue) {
  1973.           this.element = itemScroller;
  1974.           this.counter = 0;
  1975.           this.active = false;
  1976.           this.willChangeValue = willChangeValue;
  1977.         }
  1978.  
  1979.         beforeOper() {
  1980.           if (!this.active) {
  1981.             this.active = true;
  1982.             this.element.style.willChange = this.willChangeValue;
  1983.           }
  1984.           this.counter++;
  1985.         }
  1986.  
  1987.         afterOper() {
  1988.           const c = this.counter;
  1989.           requestAnimationFrame(() => {
  1990.             if (c === this.counter) {
  1991.               this.active = false;
  1992.               this.element.style.willChange = '';
  1993.             }
  1994.           });
  1995.         }
  1996.  
  1997.         release() {
  1998.           const element = this.element;
  1999.           this.element = null;
  2000.           this.counter = 1e16;
  2001.           this.active = false;
  2002.           try {
  2003.             element.style.willChange = '';
  2004.           } catch (e) { }
  2005.         }
  2006.  
  2007.       }
  2008.  
  2009.  
  2010.       const { lcRendererElm, visObserver } = (() => {
  2011.  
  2012.  
  2013.  
  2014.         let lcRendererWR = null;
  2015.  
  2016.         const lcRendererElm = () => {
  2017.           let lcRenderer = kRef(lcRendererWR);
  2018.           if (!lcRenderer || !lcRenderer.isConnected) {
  2019.             lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2020.             lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2021.           }
  2022.           return lcRenderer;
  2023.         };
  2024.  
  2025.  
  2026.         let hasFirstShowMore = false;
  2027.  
  2028.         const visObserverFn = (entry) => {
  2029.  
  2030.           const target = entry.target;
  2031.           if (!target) return;
  2032.           // if(target.classList.contains('dont-render')) return;
  2033.           let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2034.           // const h = entry.boundingClientRect.height;
  2035.           /*
  2036.           if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2037.               // e.g. under fullscreen. the element created but not rendered.
  2038.               target.setAttribute('wSr93', '');
  2039.               return;
  2040.           }
  2041.           */
  2042.           if (isVisible) {
  2043.             // target.style.setProperty('--wsr94', h + 'px');
  2044.             target.setAttribute('wSr93', 'visible');
  2045.             if (nNextElem(target) === null) {
  2046.  
  2047.               // firstVisibleItemDetected = true;
  2048.               /*
  2049.                 if (dateNow() - lastScroll < 80) {
  2050.                     lastLShow = 0;
  2051.                     lastScroll = 0;
  2052.                     Promise.resolve().then(clickShowMore);
  2053.                 } else {
  2054.                     lastLShow = dateNow();
  2055.                 }
  2056.                 */
  2057.               // lastLShow = dateNow();
  2058.             } else if (!hasFirstShowMore) { // should more than one item being visible
  2059.               // implement inside visObserver to ensure there is sufficient delay
  2060.               hasFirstShowMore = true;
  2061.               requestAnimationFrame(() => {
  2062.                 // foreground page
  2063.                 // page visibly ready -> load the latest comments at initial loading
  2064.                 const lcRenderer = lcRendererElm();
  2065.                 if (lcRenderer) {
  2066.                   (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2067.                 }
  2068.               });
  2069.             }
  2070.           }
  2071.           else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2072.  
  2073.             // target.style.setProperty('--wsr94', h + 'px');
  2074.             target.setAttribute('wSr93', 'hidden');
  2075.           } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2076.  
  2077.         }
  2078.  
  2079.  
  2080.  
  2081.         const visObserver = new IntersectionObserver((entries) => {
  2082.  
  2083.           for (const entry of entries) {
  2084.  
  2085.             Promise.resolve(entry).then(visObserverFn);
  2086.  
  2087.           }
  2088.  
  2089.         }, {
  2090.           // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2091.           rootMargin: "0px",
  2092.           threshold: [0.05, 0.95],
  2093.         });
  2094.  
  2095.  
  2096.         return { lcRendererElm, visObserver }
  2097.  
  2098.  
  2099.       })();
  2100.  
  2101.       const { setupMutObserver } = (() => {
  2102.  
  2103.         const mutFn = (items) => {
  2104.           for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2105.             if (node.hasAttribute('wSr93')) break;
  2106.             node.setAttribute('wSr93', '');
  2107.             visObserver.observe(node);
  2108.           }
  2109.         }
  2110.  
  2111.         const mutObserver = new MutationObserver((mutations) => {
  2112.           const items = (mutations[0] || 0).target;
  2113.           if (!items) return;
  2114.           mutFn(items);
  2115.         });
  2116.  
  2117.         const setupMutObserver = (m2) => {
  2118.           scrollChatFn = null;
  2119.           mutObserver.disconnect();
  2120.           mutObserver.takeRecords();
  2121.           if (m2) {
  2122.             if (typeof m2.__appendChild932__ === 'function') {
  2123.               if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2124.               if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2125.             }
  2126.             mutObserver.observe(m2, {
  2127.               childList: true,
  2128.               subtree: false
  2129.             });
  2130.             mutFn(m2);
  2131.  
  2132.  
  2133.             if (ENABLE_OVERFLOW_ANCHOR) {
  2134.  
  2135.               let items = m2;
  2136.               let addedAnchor = false;
  2137.               if (items) {
  2138.                 if (items.nextElementSibling === null) {
  2139.                   items.classList.add('no-anchor');
  2140.                   addedAnchor = true;
  2141.                   items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2142.                 }
  2143.               }
  2144.  
  2145.  
  2146.  
  2147.               if (addedAnchor) {
  2148.                 nodeParent(m2).classList.add('no-anchor'); // required
  2149.               }
  2150.  
  2151.             }
  2152.  
  2153.             // let div = document.createElement('div');
  2154.             // div.id = 'qwcc';
  2155.             // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2156.             // bufferRegion =div;
  2157.  
  2158.             // buffObserver.takeRecords();
  2159.             // buffObserver.disconnect();
  2160.             // buffObserver.observe(div,  {
  2161.             //     childList: true,
  2162.             //     subtree: false
  2163.             // })
  2164.  
  2165.  
  2166.  
  2167.           }
  2168.         }
  2169.  
  2170.         return { setupMutObserver };
  2171.  
  2172.  
  2173.  
  2174.       })();
  2175.  
  2176.       const setupEvents = () => {
  2177.  
  2178.  
  2179.         let scrollCount = 0;
  2180.  
  2181.         const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2182.  
  2183.  
  2184.         const delayFlushActiveItemsAfterUserActionK_ = () => {
  2185.  
  2186.           const lcRenderer = lcRendererElm();
  2187.           if (lcRenderer) {
  2188.             const cnt = (lcRenderer.inst || lcRenderer);
  2189.             if (!cnt.hasUserJustInteracted11_) return;
  2190.             if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2191.               cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2192.             }
  2193.           }
  2194.  
  2195.         }
  2196.  
  2197.         document.addEventListener('scroll', (evt) => {
  2198.           if (!evt || !evt.isTrusted) return;
  2199.           // lastScroll = dateNow();
  2200.           if (++scrollCount > 1e9) scrollCount = 9;
  2201.         }, passiveCapture); // support contain => support passive
  2202.  
  2203.         let lastScrollCount = -1;
  2204.         document.addEventListener('wheel', (evt) => {
  2205.           if (!evt || !evt.isTrusted) return;
  2206.           if (lastScrollCount === scrollCount) return;
  2207.           lastScrollCount = scrollCount;
  2208.           lastWheel = dateNow();
  2209.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2210.         }, passiveCapture); // support contain => support passive
  2211.  
  2212.         document.addEventListener('mousedown', (evt) => {
  2213.           if (!evt || !evt.isTrusted) return;
  2214.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2215.           lastMouseDown = dateNow();
  2216.           currentMouseDown = true;
  2217.           lastUserInteraction = lastMouseDown;
  2218.         }, passiveCapture);
  2219.  
  2220.         document.addEventListener('pointerdown', (evt) => {
  2221.           if (!evt || !evt.isTrusted) return;
  2222.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2223.           lastMouseDown = dateNow();
  2224.           currentMouseDown = true;
  2225.           lastUserInteraction = lastMouseDown;
  2226.         }, passiveCapture);
  2227.  
  2228.         document.addEventListener('click', (evt) => {
  2229.           if (!evt || !evt.isTrusted) return;
  2230.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2231.           lastMouseDown = lastMouseUp = dateNow();
  2232.           currentMouseDown = false;
  2233.           lastUserInteraction = lastMouseDown;
  2234.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2235.         }, passiveCapture);
  2236.  
  2237.         document.addEventListener('tap', (evt) => {
  2238.           if (!evt || !evt.isTrusted) return;
  2239.           if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2240.           lastMouseDown = lastMouseUp = dateNow();
  2241.           currentMouseDown = false;
  2242.           lastUserInteraction = lastMouseDown;
  2243.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2244.         }, passiveCapture);
  2245.  
  2246.  
  2247.         document.addEventListener('mouseup', (evt) => {
  2248.           if (!evt || !evt.isTrusted) return;
  2249.           if (currentMouseDown) {
  2250.             lastMouseUp = dateNow();
  2251.             currentMouseDown = false;
  2252.             lastUserInteraction = lastMouseUp;
  2253.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2254.           }
  2255.         }, passiveCapture);
  2256.  
  2257.  
  2258.         document.addEventListener('pointerup', (evt) => {
  2259.           if (!evt || !evt.isTrusted) return;
  2260.           if (currentMouseDown) {
  2261.             lastMouseUp = dateNow();
  2262.             currentMouseDown = false;
  2263.             lastUserInteraction = lastMouseUp;
  2264.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2265.           }
  2266.         }, passiveCapture);
  2267.  
  2268.         document.addEventListener('touchstart', (evt) => {
  2269.           if (!evt || !evt.isTrusted) return;
  2270.           lastTouchDown = dateNow();
  2271.           currentTouchDown = true;
  2272.           lastUserInteraction = lastTouchDown;
  2273.         }, passiveCapture);
  2274.  
  2275.         document.addEventListener('touchmove', (evt) => {
  2276.           if (!evt || !evt.isTrusted) return;
  2277.           lastTouchDown = dateNow();
  2278.           currentTouchDown = true;
  2279.           lastUserInteraction = lastTouchDown;
  2280.         }, passiveCapture);
  2281.  
  2282.         document.addEventListener('touchend', (evt) => {
  2283.           if (!evt || !evt.isTrusted) return;
  2284.           if (currentTouchDown) {
  2285.             lastTouchUp = dateNow();
  2286.             currentTouchDown = false;
  2287.             lastUserInteraction = lastTouchUp;
  2288.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2289.           }
  2290.         }, passiveCapture);
  2291.  
  2292.         document.addEventListener('touchcancel', (evt) => {
  2293.           if (!evt || !evt.isTrusted) return;
  2294.           if (currentTouchDown) {
  2295.             lastTouchUp = dateNow();
  2296.             currentTouchDown = false;
  2297.             lastUserInteraction = lastTouchUp;
  2298.             delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2299.           }
  2300.         }, passiveCapture);
  2301.  
  2302.  
  2303.       }
  2304.  
  2305.  
  2306.       const onRegistryReadyForDOMOperations = () => {
  2307.         let firstCheckedOnYtInit = false;
  2308.  
  2309.         const mightFirstCheckOnYtInit = () => {
  2310.           if (firstCheckedOnYtInit) return;
  2311.           firstCheckedOnYtInit = true;
  2312.  
  2313.           if (!document.body || !document.head) return;
  2314.  
  2315.           if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2316.  
  2317.           addCssManaged();
  2318.  
  2319.           let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2320.           if (efsContainer && efsContainer.parentNode !== document.body) {
  2321.             document.body.appendChild(efsContainer);
  2322.           }
  2323.  
  2324.  
  2325.         }
  2326.  
  2327.         if (!assertor(() => location.pathname.startsWith('/live_chat') && location.search.indexOf('continuation=') >= 0)) return;
  2328.         // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2329.  
  2330.         if (document.documentElement && document.head) {
  2331.  
  2332.           addCssManaged();
  2333.  
  2334.         }
  2335.         // console.log(document.body===null)
  2336.  
  2337.         customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2338.  
  2339.  
  2340.           const tag = "yt-live-chat-item-list-renderer"
  2341.           const dummy = document.createElement(tag);
  2342.  
  2343.  
  2344.           const cProto = getProto(dummy);
  2345.           if (!cProto || !cProto.attached) {
  2346.             console.warn(`proto.attached for ${tag} is unavailable.`);
  2347.             return;
  2348.           }
  2349.  
  2350.  
  2351.           mightFirstCheckOnYtInit();
  2352.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2353.           console.log("[Begin]");
  2354.  
  2355.           const mclp = cProto;
  2356.           try {
  2357.             assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2358.             assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2359.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2360.             assertor(() => typeof mclp.setAtBottom === 'function');
  2361.             assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2362.             assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2363.           } catch (e) { }
  2364.  
  2365.  
  2366.           try {
  2367.             assertor(() => typeof mclp.attached === 'function');
  2368.             assertor(() => typeof mclp.detached === 'function');
  2369.             assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2370.             assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2371.             assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2372.             assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2373.             assertor(() => typeof mclp.smoothScroll_ === 'function');
  2374.             assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2375.           } catch (e) { }
  2376.  
  2377.           mclp.__intermediate_delay__ = null;
  2378.  
  2379.           let mzk = 0;
  2380.           let myk = 0;
  2381.           let mlf = 0;
  2382.           let myw = 0;
  2383.           let mzt = 0;
  2384.           let zarr = null;
  2385.           let mlg = 0;
  2386.  
  2387.           if ((mclp.clearList || 0).length === 0) {
  2388.             assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2389.             mclp.clearList66 = mclp.clearList;
  2390.             mclp.clearList = function () {
  2391.               mzk++;
  2392.               myk++;
  2393.               mlf++;
  2394.               myw++;
  2395.               mzt++;
  2396.               mlg++;
  2397.               zarr = null;
  2398.               this.__intermediate_delay__ = null;
  2399.               this.clearList66();
  2400.             };
  2401.             console.log("clearList", "OK");
  2402.           } else {
  2403.             console.log("clearList", "NG");
  2404.           }
  2405.  
  2406.  
  2407.           let onListRendererAttachedDone = false;
  2408.  
  2409.           function setList(itemOffset, items) {
  2410.  
  2411.             const isFirstTime = onListRendererAttachedDone === false;
  2412.  
  2413.             if (isFirstTime) {
  2414.               onListRendererAttachedDone = true;
  2415.               Promise.resolve().then(watchUserCSS);
  2416.               addCssManaged();
  2417.               setupEvents();
  2418.             }
  2419.  
  2420.             setupStyle(itemOffset, items);
  2421.  
  2422.             setupMutObserver(items);
  2423.           }
  2424.  
  2425.           mclp.attached419 = async function () {
  2426.  
  2427.             if (!this.isAttached) return;
  2428.  
  2429.             let maxTrial = 16;
  2430.             while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  2431.               if (--maxTrial < 0 || !this.isAttached) return;
  2432.               await new Promise(requestAnimationFrame);
  2433.             }
  2434.  
  2435.             if (this.isAttached !== true) return;
  2436.  
  2437.             if (!this.$) {
  2438.               console.warn("!this.$");
  2439.               return;
  2440.             }
  2441.             if (!this.$) return;
  2442.             /** @type {HTMLElement | null} */
  2443.             const itemScroller = this.$['item-scroller'];
  2444.             /** @type {HTMLElement | null} */
  2445.             const itemOffset = this.$['item-offset'];
  2446.             /** @type {HTMLElement | null} */
  2447.             const items = this.$['items'];
  2448.  
  2449.             if (!itemScroller || !itemOffset || !items) {
  2450.               console.warn("items.parentNode !== itemOffset");
  2451.               return;
  2452.             }
  2453.  
  2454.             if (nodeParent(items) !== itemOffset) {
  2455.  
  2456.               console.warn("items.parentNode !== itemOffset");
  2457.               return;
  2458.             }
  2459.  
  2460.  
  2461.             if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  2462.  
  2463.               console.warn("id incorrect");
  2464.               return;
  2465.             }
  2466.  
  2467.             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')
  2468.  
  2469.             if (!isTargetItems) {
  2470.               console.warn("!isTargetItems");
  2471.               return;
  2472.             }
  2473.  
  2474.             setList(itemOffset, items);
  2475.  
  2476.           }
  2477.  
  2478.           mclp.attached331 = mclp.attached;
  2479.           mclp.attached = function () {
  2480.             this.attached419 && this.attached419();
  2481.             return this.attached331();
  2482.           }
  2483.  
  2484.           mclp.detached331 = mclp.detached;
  2485.  
  2486.           mclp.detached = function () {
  2487.             setupMutObserver();
  2488.             return this.detached331();
  2489.           }
  2490.  
  2491.           const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  2492.           for (const t29 of t29s) {
  2493.             if ((t29.inst || t29).isAttached === true) {
  2494.               t29.attached419();
  2495.             }
  2496.           }
  2497.  
  2498.           if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  2499.  
  2500.             assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  2501.             assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  2502.  
  2503.             /** @type {Map<number, any>} */
  2504.             const aMap = new Map();
  2505.             let count = 6150;
  2506.             mclp.async66 = mclp.async;
  2507.             mclp.async = function (e, f) {
  2508.               // ensure the previous operation is done
  2509.               // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  2510.               const hasF = arguments.length === 2;
  2511.               const stack = new Error().stack;
  2512.               const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  2513.               if (count > 1e9) count = 6159;
  2514.               const resId = ++count;
  2515.               aMap.set(resId, e);
  2516.               (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  2517.                 const rp = aMap.get(resId);
  2518.                 if (typeof rp !== 'function') {
  2519.                   return;
  2520.                 }
  2521.                 let cancelCall = false;
  2522.                 if (isFlushAsync) {
  2523.                   if (rk < 0) {
  2524.                     cancelCall = true;
  2525.                   } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  2526.                     cancelCall = true;
  2527.                   }
  2528.                 }
  2529.                 if (cancelCall) {
  2530.                   aMap.delete(resId);
  2531.                 } else {
  2532.                   const asyncEn = function () {
  2533.                     aMap.delete(resId);
  2534.                     return rp.apply(this, arguments);
  2535.                   };
  2536.                   aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  2537.                 }
  2538.               });
  2539.  
  2540.               return resId;
  2541.             }
  2542.  
  2543.             mclp.cancelAsync66 = mclp.cancelAsync;
  2544.             mclp.cancelAsync = function (resId) {
  2545.               if (resId <= 6150) {
  2546.                 this.cancelAsync66(resId);
  2547.               } else if (aMap.has(resId)) {
  2548.                 const rp = aMap.get(resId);
  2549.                 aMap.delete(resId);
  2550.                 if (typeof rp !== 'function') {
  2551.                   this.cancelAsync66(rp);
  2552.                 }
  2553.               }
  2554.             }
  2555.  
  2556.             console.log("async", "OK");
  2557.           } else {
  2558.             console.log("async", "NG");
  2559.           }
  2560.  
  2561.  
  2562.           if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  2563.  
  2564.             assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  2565.             mclp.showNewItems66_ = mclp.showNewItems_;
  2566.  
  2567.             mclp.showNewItems77_ = async function () {
  2568.               if (myk > 1e9) myk = 9;
  2569.               let tid = ++myk;
  2570.  
  2571.               await new Promise(requestAnimationFrame);
  2572.  
  2573.               if (tid !== myk) {
  2574.                 return;
  2575.               }
  2576.  
  2577.               const cnt = this;
  2578.  
  2579.               await Promise.resolve();
  2580.               cnt.showNewItems66_();
  2581.  
  2582.               await Promise.resolve();
  2583.  
  2584.             }
  2585.  
  2586.             mclp.showNewItems_ = function () {
  2587.  
  2588.               const cnt = this;
  2589.               cnt.__intermediate_delay__ = new Promise(resolve => {
  2590.                 cnt.showNewItems77_().then(() => {
  2591.                   resolve();
  2592.                 });
  2593.               });
  2594.             }
  2595.  
  2596.             console.log("showNewItems_", "OK");
  2597.           } else {
  2598.             console.log("showNewItems_", "NG");
  2599.           }
  2600.  
  2601.  
  2602.           if ((mclp.flushActiveItems_ || 0).length === 0) {
  2603.  
  2604.             assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  2605.  
  2606.             let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  2607.  
  2608.             let contensWillChangeController = null;
  2609.  
  2610.             mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  2611.  
  2612.             mclp.flushActiveItems78_ = async function (tid) {
  2613.               try {
  2614.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  2615.                 let logger = false;
  2616.                 const cnt = this;
  2617.                 let immd = cnt.__intermediate_delay__;
  2618.                 await new Promise(requestAnimationFrame);
  2619.  
  2620.                 if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  2621.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  2622.  
  2623.                 mlf++;
  2624.                 if (mlg > 1e9) mlg = 9;
  2625.                 ++mlg;
  2626.  
  2627.                 const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  2628.                 const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  2629.                 let changeMaxItemsToDisplay = false;
  2630.                 const activeItemsLen = this.activeItems_.length;
  2631.                 if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  2632.                   logger = true;
  2633.  
  2634.                   groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  2635.  
  2636.                   logger && console.log('[Begin]')
  2637.  
  2638.                   console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  2639.                   if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  2640.                     console.log('reduce maxitems');
  2641.                     if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  2642.                       // as all the rendered chats are already "outdated"
  2643.                       // all old chats shall remove and reduced number of few chats will be rendered
  2644.                       // then restore to the original number
  2645.                       changeMaxItemsToDisplay = true;
  2646.                       this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  2647.                       console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  2648.                     }
  2649.                     this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  2650.                     //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  2651.  
  2652.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  2653.                   } else {
  2654.                     this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  2655.  
  2656.                     console.log('new this.activeItems_.length > N', this.activeItems_.length);
  2657.                   }
  2658.                 }
  2659.                 // it is found that it will render all stacked chats after switching back from background
  2660.                 // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  2661.                 // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  2662.  
  2663.  
  2664.                 const items = (cnt.$ || 0).items;
  2665.  
  2666.                 if (USE_WILL_CHANGE_CONTROLLER) {
  2667.                   if (contensWillChangeController && contensWillChangeController.element !== items) {
  2668.                     contensWillChangeController.release();
  2669.                     contensWillChangeController = null;
  2670.                   }
  2671.                   if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  2672.                 }
  2673.                 const wcController = contensWillChangeController;
  2674.                 cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  2675.                 wcController && wcController.beforeOper();
  2676.                 await Promise.resolve();
  2677.                 const len1 = cnt.activeItems_.length;
  2678.                 let waitFor = [];
  2679.                 if (cnt.activeItems_.length > 0) {
  2680.  
  2681.                   function setThumbnails(config) {
  2682.                     const { baseObject, thumbnails, flag0 } = config;
  2683.                     if (thumbnails && thumbnails.length > 0) {
  2684.                       if (flag0 > 0) {
  2685.                         let pSize = 0;
  2686.                         let newThumbnails = [];
  2687.                         for (const thumbnail of thumbnails) {
  2688.                           if (!thumbnail || !thumbnail.url) continue;
  2689.                           const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  2690.                           const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  2691.                           const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  2692.                           if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  2693.                             newThumbnails.push(thumbnail);
  2694.                             imageLinks.add(thumbnail.url);
  2695.                           }
  2696.                           if (squarePhoto && condSize && leastSizeFulfilled) {
  2697.                             pSize = thumbnail.width;
  2698.                           }
  2699.                         }
  2700.                         if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  2701.                           baseObject.thumbnails = newThumbnails;
  2702.                         } else {
  2703.                           newThumbnails.length = 0;
  2704.                         }
  2705.                         newThumbnails = null;
  2706.                       } else {
  2707.                         for (const thumbnail of thumbnails) {
  2708.                           if (thumbnail && thumbnail.url) {
  2709.                             imageLinks.add(thumbnail.url);
  2710.                           }
  2711.                         }
  2712.                       }
  2713.                     }
  2714.                   }
  2715.  
  2716.                   /** @type {Set<string>} */
  2717.                   const imageLinks = new Set();
  2718.                   for (const item of cnt.activeItems_) {
  2719.                     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  2720.                     if (!liveChatTextMessageRenderer) continue;
  2721.  
  2722.                     const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  2723.  
  2724.                     if (messageRuns && messageRuns.length > 0) {
  2725.                       for (const run of messageRuns) {
  2726.                         const emojiImage = (((run || 0).emoji || 0).image || 0);
  2727.                         const emojiThumbnails = (emojiImage.thumbnails || 0);
  2728.  
  2729.                         setThumbnails({
  2730.                           baseObject: emojiImage,
  2731.                           thumbnails: emojiThumbnails,
  2732.                           flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  2733.  
  2734.                         });
  2735.  
  2736.                       }
  2737.                     }
  2738.  
  2739.                     const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  2740.                     const authorPhotoThumbnails = (authorPhoto.thumbnails || 0);
  2741.  
  2742.                     setThumbnails({
  2743.                       baseObject: authorPhoto,
  2744.                       thumbnails: authorPhotoThumbnails,
  2745.                       flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  2746.  
  2747.                     });
  2748.  
  2749.                   }
  2750.  
  2751.                   if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4))) {
  2752.                     if (emojiPrefetched.size > 512) emojiPrefetched.clear();
  2753.                     if (authorPhotoPrefetched.size > 68) authorPhotoPrefetched.clear();
  2754.                     imageLinks.forEach(imageLink => {
  2755.                       let d = false;
  2756.                       const isEmoji = imageLink.includes('/emoji/');
  2757.                       const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  2758.  
  2759.                       if (!pretechedSet.has(imageLink)) {
  2760.                         pretechedSet.add(imageLink);
  2761.                         d = true;
  2762.                       }
  2763.                       if (d) {
  2764.                         const rel = kptPF & 8 ? 'subresource' : kptPF & 4 ? 'prefetch' : '';
  2765.                         if (rel) {
  2766.                           waitFor.push(linker(null, rel, imageLink, 'image'));
  2767.                         }
  2768.                       }
  2769.  
  2770.  
  2771.                     })
  2772.                   }
  2773.  
  2774.                   // console.log(cnt.activeItems_)
  2775.                   // console.log([...imageLinks.values()])
  2776.                 }
  2777.                 skipDontRender = (((cnt.$ || 0).items || 0).childElementCount || 0) === 0;
  2778.                 // console.log('ss1', Date.now())
  2779.                 if (waitFor.length > 0) {
  2780.                   await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  2781.                 }
  2782.                 // console.log('ss2', Date.now())
  2783.                 cnt.flushActiveItems66_();
  2784.                 skipDontRender = (((cnt.$ || 0).items || 0).childElementCount || 0) === 0;
  2785.                 const len2 = cnt.activeItems_.length;
  2786.                 const bAsync = len1 !== len2;
  2787.                 await Promise.resolve();
  2788.                 if (wcController) {
  2789.                   if (bAsync) {
  2790.                     cnt.async(() => {
  2791.                       wcController.afterOper();
  2792.                     });
  2793.                   } else {
  2794.                     wcController.afterOper();
  2795.                   }
  2796.                 }
  2797.                 if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  2798.                   this.data.maxItemsToDisplay = tmpMaxItemsCount;
  2799.  
  2800.                   logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  2801.                   //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  2802.                 } else if (changeMaxItemsToDisplay) {
  2803.  
  2804.                   logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  2805.                     maxItemsToDisplay: this.data.maxItemsToDisplay,
  2806.                     reducedMaxItemsToDisplay,
  2807.                     originalMaxItemsToDisplay: tmpMaxItemsCount
  2808.                   });
  2809.                 }
  2810.                 logger && console.log('[End]')
  2811.  
  2812.                 logger && console.groupEnd();
  2813.  
  2814.                 if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  2815.  
  2816.  
  2817.                   const ff = () => {
  2818.  
  2819.                     if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  2820.                     //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  2821.                     if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  2822.                       cnt.scrollToBottom_();
  2823.  
  2824.                       Promise.resolve().then(() => {
  2825.  
  2826.                         if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  2827.                         if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  2828.                       });
  2829.  
  2830.  
  2831.                     }
  2832.                   }
  2833.  
  2834.                   ff();
  2835.  
  2836.  
  2837.                   Promise.resolve().then(ff);
  2838.  
  2839.                   // requestAnimationFrame(ff);
  2840.                 } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  2841.  
  2842.                   const knt = cnt;
  2843.                   if (!scrollChatFn) {
  2844.                     const cnt = knt;
  2845.                     const f = () => {
  2846.                       const itemScroller = cnt.itemScroller;
  2847.                       if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  2848.                       if (!cnt.atBottom) {
  2849.                         cnt.scrollToBottom_();
  2850.                       } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  2851.                         itemScroller.scrollTop = itemScroller.scrollHeight;
  2852.                       }
  2853.                     };
  2854.                     scrollChatFn = () => Promise.resolve().then(f).then(f);
  2855.                   }
  2856.  
  2857.                   if (!ENABLE_FULL_RENDER_REQUIRED) scrollChatFn();
  2858.                 }
  2859.  
  2860.                 return 1;
  2861.  
  2862.  
  2863.               } catch (e) {
  2864.                 console.warn(e);
  2865.               }
  2866.             }
  2867.  
  2868.             mclp.flushActiveItems77_ = async function () {
  2869.               try {
  2870.  
  2871.                 const cnt = this;
  2872.                 if (mlf > 1e9) mlf = 9;
  2873.                 let tid = ++mlf;
  2874.                 if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  2875.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  2876.  
  2877.                 // 4 times to maxItems to avoid frequent trimming.
  2878.                 // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  2879.  
  2880.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  2881.                 this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  2882.                 if (cnt.canScrollToBottom_()) {
  2883.                   if (cnt.mutexPromiseFA77) await cnt.mutexPromiseFA77;
  2884.                   if (tid !== mlf) return;
  2885.                   let qResolve = null;
  2886.                   cnt.mutexPromiseFA77 = new Promise(resolve => { qResolve = resolve; })
  2887.                   let res;
  2888.                   try {
  2889.                     res = await cnt.flushActiveItems78_(tid);
  2890.                     if (hasMoreMessageState === 1) {
  2891.                       hasMoreMessageState = 0;
  2892.                       const showMore = cnt.$['show-more'];
  2893.                       if (showMore) {
  2894.                         showMore.classList.remove('has-new-messages-miuzp');
  2895.                       }
  2896.                     }
  2897.                   } catch (e) {
  2898.                     console.warn(e);
  2899.                   }
  2900.                   qResolve && qResolve();
  2901.                   return res;
  2902.                 } else {
  2903.                   if (hasMoreMessageState === 0) {
  2904.                     hasMoreMessageState = 1;
  2905.                     const showMore = cnt.$['show-more'];
  2906.                     if (showMore) {
  2907.                       showMore.classList.add('has-new-messages-miuzp');
  2908.                     }
  2909.                   }
  2910.                   // cnt.flushActiveItems66_();
  2911.                   // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  2912.                   return 2;
  2913.                 }
  2914.               } catch (e) {
  2915.                 console.warn(e);
  2916.               }
  2917.             }
  2918.  
  2919.             mclp.flushActiveItems_ = function () {
  2920.               const cnt = this;
  2921.  
  2922.               if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  2923.  
  2924.               if (cnt.activeItems_.length === 0) {
  2925.                 cnt.__intermediate_delay__ = null;
  2926.                 return;
  2927.               }
  2928.  
  2929.               const cntData = ((cnt || 0).data || 0);
  2930.               if (cntData.maxItemsToDisplay944 === undefined) {
  2931.                 cntData.maxItemsToDisplay944 = null;
  2932.                 if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  2933.                 cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  2934.               }
  2935.  
  2936.               // ignore previous __intermediate_delay__ and create a new one
  2937.               cnt.__intermediate_delay__ = new Promise(resolve => {
  2938.                 cnt.flushActiveItems77_().then(rt => {
  2939.                   if (rt === 1) resolve(1); // success, scroll to bottom
  2940.                   else if (rt === 2) resolve(2); // success, trim
  2941.                   else resolve(-1); // skip
  2942.                 });
  2943.               });
  2944.  
  2945.             }
  2946.             console.log("flushActiveItems_", "OK");
  2947.           } else {
  2948.             console.log("flushActiveItems_", "NG");
  2949.           }
  2950.  
  2951.           mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  2952.             try {
  2953.               if (mlg > 1e9) mlg = 9;
  2954.               const tid = ++mlg;
  2955.               const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  2956.               const runCond = () => this.canScrollToBottom_();
  2957.               if (!keepTrialCond()) return;
  2958.               if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  2959.               await new Promise(r => setTimeout(r, 80));
  2960.               if (!keepTrialCond()) return;
  2961.               if (runCond()) return this.flushActiveItems_() | 1;
  2962.               await new Promise(requestAnimationFrame);
  2963.               if (runCond()) return this.flushActiveItems_() | 1;
  2964.             } catch (e) {
  2965.               console.warn(e);
  2966.             }
  2967.           }
  2968.  
  2969.           if ((mclp.atBottomChanged_ || 0).length === 1) {
  2970.             // note: if the scrolling is too frequent, the show more visibility might get wrong.
  2971.             assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  2972.  
  2973.             const querySelector = HTMLElement.prototype.querySelector;
  2974.             const U = (element) => ({
  2975.               querySelector: (selector) => querySelector.call(element, selector)
  2976.             });
  2977.  
  2978.             let qid = 0;
  2979.             mclp.atBottomChanged_ = function (a) {
  2980.               let tid = ++qid;
  2981.               var b = this;
  2982.               a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  2983.                 if (tid !== qid) return;
  2984.                 U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  2985.               }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  2986.                 this.hideShowMoreAsync_ = null,
  2987.                 U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  2988.             }
  2989.  
  2990.             console.log("atBottomChanged_", "OK");
  2991.           } else {
  2992.             console.log("atBottomChanged_", "NG");
  2993.           }
  2994.  
  2995.           if ((mclp.onScrollItems_ || 0).length === 1) {
  2996.  
  2997.             assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  2998.             mclp.onScrollItems66_ = mclp.onScrollItems_;
  2999.             mclp.onScrollItems77_ = async function (evt) {
  3000.               if (myw > 1e9) myw = 9;
  3001.               let tid = ++myw;
  3002.  
  3003.               await new Promise(requestAnimationFrame);
  3004.  
  3005.               if (tid !== myw) {
  3006.                 return;
  3007.               }
  3008.  
  3009.               const cnt = this;
  3010.  
  3011.               await Promise.resolve();
  3012.               if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3013.                 await Promise.resolve().then(() => {
  3014.                   this.ytRendererBehavior.onScroll(evt);
  3015.                 }).then(() => {
  3016.                   if (this.canScrollToBottom_()) {
  3017.                     const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3018.                     if (hasUserJustInteracted) {
  3019.                       // only when there is an user action
  3020.                       this.setAtBottom();
  3021.                       return 1;
  3022.                     }
  3023.                   } else {
  3024.                     // no message inserting
  3025.                     this.setAtBottom();
  3026.                     return 1;
  3027.                   }
  3028.                 }).then((r) => {
  3029.  
  3030.                   if (this.activeItems_.length) {
  3031.  
  3032.                     if (this.canScrollToBottom_()) {
  3033.                       this.flushActiveItems_();
  3034.                       return 1 && r;
  3035.                     } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3036.                       // delayed due to user action
  3037.                       this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3038.                       return 0;
  3039.                     }
  3040.                   }
  3041.                 }).then((r) => {
  3042.                   if (r) {
  3043.                     // ensure setAtBottom is correctly set
  3044.                     this.setAtBottom();
  3045.                   }
  3046.                 });
  3047.               } else {
  3048.                 cnt.onScrollItems66_(evt);
  3049.               }
  3050.  
  3051.               await Promise.resolve();
  3052.  
  3053.             }
  3054.  
  3055.             mclp.onScrollItems_ = function (evt) {
  3056.  
  3057.               const cnt = this;
  3058.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3059.                 cnt.onScrollItems77_(evt).then(() => {
  3060.                   resolve();
  3061.                 });
  3062.               });
  3063.             }
  3064.             console.log("onScrollItems_", "OK");
  3065.           } else {
  3066.             console.log("onScrollItems_", "NG");
  3067.           }
  3068.  
  3069.           if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3070.  
  3071.             assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3072.             mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3073.  
  3074.             mclp.handleLiveChatActions77_ = async function (arr) {
  3075.               if (typeof (arr || 0).length !== 'number') {
  3076.                 this.handleLiveChatActions66_(arr);
  3077.                 return;
  3078.               }
  3079.               if (mzt > 1e9) mzt = 9;
  3080.               let tid = ++mzt;
  3081.  
  3082.               if (zarr === null) zarr = arr;
  3083.               else Array.prototype.push.apply(zarr, arr);
  3084.               arr = null;
  3085.  
  3086.               await new Promise(requestAnimationFrame);
  3087.  
  3088.               if (tid !== mzt || zarr === null) {
  3089.                 return;
  3090.               }
  3091.  
  3092.               const carr = zarr;
  3093.               zarr = null;
  3094.  
  3095.               await Promise.resolve();
  3096.               this.handleLiveChatActions66_(carr);
  3097.               await Promise.resolve();
  3098.  
  3099.             }
  3100.  
  3101.             mclp.handleLiveChatActions_ = function (arr) {
  3102.  
  3103.               const cnt = this;
  3104.               cnt.__intermediate_delay__ = new Promise(resolve => {
  3105.                 cnt.handleLiveChatActions77_(arr).then(() => {
  3106.                   resolve();
  3107.                 });
  3108.               });
  3109.             }
  3110.             console.log("handleLiveChatActions_", "OK");
  3111.           } else {
  3112.             console.log("handleLiveChatActions_", "NG");
  3113.           }
  3114.  
  3115.           mclp.hasUserJustInteracted11_ = () => {
  3116.             const t = dateNow();
  3117.             return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3118.           }
  3119.  
  3120.           if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3121.  
  3122.             assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3123.  
  3124.             mclp.canScrollToBottom_ = function () {
  3125.               return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3126.             }
  3127.  
  3128.             console.log("canScrollToBottom_", "OK");
  3129.           } else {
  3130.             console.log("canScrollToBottom_", "NG");
  3131.           }
  3132.  
  3133.           if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3134.  
  3135.             mclp.isSmoothScrollEnabled_ = function () {
  3136.               return false;
  3137.             }
  3138.  
  3139.             mclp.maybeResizeScrollContainer_ = function () {
  3140.               //
  3141.             }
  3142.  
  3143.             mclp.refreshOffsetContainerHeight_ = function () {
  3144.               //
  3145.             }
  3146.  
  3147.             mclp.smoothScroll_ = function () {
  3148.               //
  3149.             }
  3150.  
  3151.             mclp.resetSmoothScroll_ = function () {
  3152.               //
  3153.             }
  3154.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3155.           } else {
  3156.             console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3157.           }
  3158.  
  3159.           if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) {
  3160.  
  3161.  
  3162.  
  3163.             function setThumbnails(config) {
  3164.               const { baseObject, thumbnails, flag0 } = config;
  3165.               if (thumbnails && thumbnails.length > 0) {
  3166.                 if (flag0 > 0) {
  3167.                   let pSize = 0;
  3168.                   let newThumbnails = [];
  3169.                   for (const thumbnail of thumbnails) {
  3170.                     if (!thumbnail || !thumbnail.url) continue;
  3171.                     const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  3172.                     const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  3173.                     const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  3174.                     if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  3175.                       newThumbnails.push(thumbnail);
  3176.                       // imageLinks.add(thumbnail.url);
  3177.                     }
  3178.                     if (squarePhoto && condSize && leastSizeFulfilled) {
  3179.                       pSize = thumbnail.width;
  3180.                     }
  3181.                   }
  3182.                   if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  3183.                     baseObject.thumbnails = newThumbnails;
  3184.                   } else {
  3185.                     newThumbnails.length = 0;
  3186.                   }
  3187.                   newThumbnails = null;
  3188.                 } else {
  3189.                   for (const thumbnail of thumbnails) {
  3190.                     if (thumbnail && thumbnail.url) {
  3191.                    //   imageLinks.add(thumbnail.url);
  3192.                     }
  3193.                   }
  3194.                 }
  3195.               }
  3196.             }
  3197.  
  3198.  
  3199.             function fixLiveChatItem(a){
  3200.  
  3201.  
  3202.               const liveChatTextMessageRenderer = ((a || 0).item || 0).liveChatTextMessageRenderer || 0;
  3203.               if (liveChatTextMessageRenderer) {
  3204.  
  3205.  
  3206.                 const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  3207.  
  3208.                 if (messageRuns && messageRuns.length > 0) {
  3209.                   for (const run of messageRuns) {
  3210.                     const emojiImage = (((run || 0).emoji || 0).image || 0);
  3211.                     const emojiThumbnails = (emojiImage.thumbnails || 0);
  3212.  
  3213.                     setThumbnails({
  3214.                       baseObject: emojiImage,
  3215.                       thumbnails: emojiThumbnails,
  3216.                       flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  3217.  
  3218.                     });
  3219.  
  3220.                   }
  3221.                 }
  3222.  
  3223.                 const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  3224.                 setThumbnails({
  3225.                   baseObject:authorPhoto,
  3226.                   thumbnails:authorPhoto.thumbnails,
  3227.                   flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  3228.                 })
  3229.               }
  3230.  
  3231.             }
  3232.             mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3233.             mclp.handleAddChatItemAction_ = function (a) {
  3234.  
  3235.               try {
  3236.                 if (arguments.length >= 1 && a && typeof a === 'object' && !('length' in a)) {
  3237.                   fixLiveChatItem(a);
  3238.                   console.assert(arguments[0] === a);
  3239.                 }
  3240.  
  3241.               } catch (e) { }
  3242.               return this.handleAddChatItemAction66_.apply(this, arguments);
  3243.             }
  3244.  
  3245.  
  3246.             if(FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3247.           }else{
  3248.  
  3249.  
  3250.             if(FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3251.           }
  3252.  
  3253.  
  3254.           if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) {
  3255.  
  3256.             mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3257.             mclp.handleReplaceChatItemAction_ = function (k) {
  3258.               try {
  3259.                 if (k && k.replacementItem) {
  3260.                   let a = k.replacementItem;
  3261.                   if (a && typeof a === 'object' && !('length' in a)) {
  3262.                     fixLiveChatItem(a);
  3263.                     console.assert(arguments[0] === a);
  3264.                   }
  3265.                 }
  3266.               } catch (e) { }
  3267.               return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3268.             }
  3269.  
  3270.  
  3271.  
  3272.             if(FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3273.  
  3274.           }else{
  3275.  
  3276.  
  3277.             if(FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3278.           }
  3279.  
  3280.           console.log("[End]");
  3281.           console.groupEnd();
  3282.  
  3283.         });
  3284.  
  3285.  
  3286.         const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3287.  
  3288.           let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3289.  
  3290.           if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3291.  
  3292.             // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3293.             let v = `${attrValue}`;
  3294.             // conside a ticker is 101px width
  3295.             // 1% = 1.01px
  3296.             // 0.2% = 0.202px
  3297.  
  3298.  
  3299.             const ratio1 = (yd.ratio * 100);
  3300.             if (ratio1 > -1) { // avoid NaN
  3301.  
  3302.               // countdownDurationMs
  3303.               // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3304.               // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3305.               // 150000 - 1%    <1% = 1.5s>
  3306.               // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3307.               // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3308.  
  3309.               // 99px * 5% = 4.95px
  3310.  
  3311.               // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3312.  
  3313.  
  3314.               // 1% Duration
  3315.  
  3316.               let ratio2 = ratio1;
  3317.  
  3318.               const ydd = yd.data;
  3319.               const d1 = ydd.durationSec;
  3320.               const d2 = ydd.fullDurationSec;
  3321.  
  3322.               if (d1 === d2 && d1 > 1) {
  3323.  
  3324.                 if (d1 > 400) ratio2 = Math.round(ratio2 * 5) / 5; // 0.2%
  3325.                 else if (d1 > 200) ratio2 = Math.round(ratio2 * 2) / 2; // 0.5%
  3326.                 else if (d1 > 100) ratio2 = Math.round(ratio2 * 1) / 1; // 1%
  3327.                 else if (d1 > 50) ratio2 = Math.round(ratio2 * 0.5) / 0.5; // 2%
  3328.                 else if (d1 > 25) ratio2 = Math.round(ratio2 * 0.2) / 0.2; // 5% (max => 99px * 5% = 4.95px)
  3329.                 else ratio2 = Math.round(ratio2 * 0.2) / 0.2;
  3330.  
  3331.               } else {
  3332.                 ratio2 = Math.round(ratio2 * 5) / 5; // 0.2% (min)
  3333.               }
  3334.  
  3335.               // ratio2 = Math.round(ratio2 * 5) / 5;
  3336.               ratio2 = ratio2.toFixed(1);
  3337.               v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3338.  
  3339.               if (yd.__style_last__ === v) return;
  3340.               yd.__style_last__ = v;
  3341.               // do not consider any delay here.
  3342.               // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3343.  
  3344.             }
  3345.  
  3346.             HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3347.  
  3348.  
  3349.           } else {
  3350.             HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3351.           }
  3352.  
  3353.         };
  3354.  
  3355.  
  3356.         const fpTicker = (renderer) => {
  3357.           const cnt = renderer.inst || renderer;
  3358.           assertor(() => typeof (cnt || 0).is === 'string');
  3359.           assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3360.           const container = (cnt.$ || 0).container;
  3361.           if (container) {
  3362.             assertor(() => (container || 0).nodeType === 1);
  3363.             assertor(() => typeof container.setAttribute === 'function');
  3364.             container.setAttribute = tickerContainerSetAttribute;
  3365.           } else {
  3366.             console.warn(`"container" does not exist in ${cnt.is}`);
  3367.           }
  3368.         };
  3369.  
  3370.         const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3371.           "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3372.  
  3373.  
  3374.         Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3375.  
  3376.           mightFirstCheckOnYtInit();
  3377.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3378.           console.log("[Begin]");
  3379.  
  3380.           for (const tag of tags) {
  3381.             const dummy = document.createElement(tag);
  3382.  
  3383.             const cProto = getProto(dummy);
  3384.             if (!cProto || !cProto.attached) {
  3385.               console.warn(`proto.attached for ${tag} is unavailable.`);
  3386.               continue;
  3387.             }
  3388.  
  3389.             cProto.attached77 = cProto.attached;
  3390.  
  3391.             cProto.attached = function () {
  3392.               fpTicker(this.hostElement || this);
  3393.               return this.attached77();
  3394.             }
  3395.  
  3396.             for (const elm of document.getElementsByTagName(tag)) {
  3397.               if ((elm || elm.inst).isAttached === true) {
  3398.                 fpTicker(elm);
  3399.               }
  3400.             }
  3401.  
  3402.             if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3403.  
  3404.               // cancelable - this.rafId < isAnimationPausedChanged >
  3405.  
  3406.               let doHack = false;
  3407.  
  3408.               if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3409.  
  3410.                 console.log('startCountdown', typeof cProto.startCountdown)
  3411.                 console.log('updateTimeout', typeof cProto.updateTimeout)
  3412.                 console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3413.  
  3414.                 doHack = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3415.  
  3416.               }
  3417.               if (doHack) {
  3418.  
  3419.                 cProto.startCountdown = function (a, b) {
  3420.                   // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  3421.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  3422.                   b = void 0 === b ? 0 : b;
  3423.                   void 0 !== a && (this.countdownMs = 1E3 * a,
  3424.                     this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  3425.                     this.ratio = 1,
  3426.                     this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  3427.                       this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  3428.                 };
  3429.  
  3430.                 cProto.updateTimeout = function (a) {
  3431.                   // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  3432.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  3433.                   this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  3434.                   this.ratio = this.countdownMs / this.countdownDurationMs;
  3435.                   this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  3436.                     this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  3437.                       this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  3438.                         this.slideDown()))
  3439.                 };
  3440.  
  3441.                 cProto.isAnimationPausedChanged = function (a, b) {
  3442.                   if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  3443.                   a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  3444.                     this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  3445.                       this.detlaSincePausedSecs = 0),
  3446.                     this.boundUpdateTimeout37_(a),
  3447.                     this.lastCountdownTimeMs = window.performance.now())
  3448.                 };
  3449.  
  3450.                 console.log('RAF_HACK_TICKERS', tag, "OK")
  3451.               } else if (tag === 'yt-live-chat-ticker-renderer') {
  3452.  
  3453.                 // no timer function to be set on yt-live-chat-ticker-renderer
  3454.  
  3455.               } else {
  3456.  
  3457.                 console.log('RAF_HACK_TICKERS', tag, "NG")
  3458.               }
  3459.  
  3460.             }
  3461.  
  3462.           }
  3463.           console.log("[End]");
  3464.           console.groupEnd();
  3465.  
  3466.  
  3467.         })
  3468.  
  3469.  
  3470.         if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  3471.  
  3472.  
  3473.           customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  3474.  
  3475.             mightFirstCheckOnYtInit();
  3476.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  3477.             console.log("[Begin]");
  3478.             (() => {
  3479.  
  3480.               const tag = "yt-live-chat-message-input-renderer"
  3481.               const dummy = document.createElement(tag);
  3482.  
  3483.               const cProto = getProto(dummy);
  3484.               if (!cProto || !cProto.attached) {
  3485.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  3486.                 return;
  3487.               }
  3488.  
  3489.               let doHack = false;
  3490.               if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  3491.  
  3492.                 // not cancellable
  3493.                 console.log('handleTimeout', typeof cProto.handleTimeout)
  3494.                 console.log('updateTimeout', typeof cProto.updateTimeout)
  3495.  
  3496.                 doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  3497.  
  3498.               }
  3499.  
  3500.               if (doHack) {
  3501.  
  3502.                 cProto.handleTimeout = function (a) {
  3503.                   console.log('cProto.handleTimeout', tag)
  3504.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  3505.                   this.timeoutDurationMs = this.timeoutMs = a;
  3506.                   this.countdownRatio = 1;
  3507.                   0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  3508.                 };
  3509.                 cProto.updateTimeout = function (a) {
  3510.                   console.log('cProto.updateTimeout', tag)
  3511.                   if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  3512.                   this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  3513.                     this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  3514.                   this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  3515.                     rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  3516.                 };
  3517.  
  3518.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  3519.               } else {
  3520.  
  3521.                 console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  3522.               }
  3523.  
  3524.             })();
  3525.  
  3526.             console.log("[End]");
  3527.  
  3528.             console.groupEnd();
  3529.  
  3530.  
  3531.           })
  3532.  
  3533.  
  3534.         }
  3535.  
  3536.         if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  3537.  
  3538.  
  3539.           customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  3540.  
  3541.             mightFirstCheckOnYtInit();
  3542.             groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  3543.             console.log("[Begin]");
  3544.             (() => {
  3545.  
  3546.               const tag = "yt-emoji-picker-renderer"
  3547.               const dummy = document.createElement(tag);
  3548.  
  3549.               const cProto = getProto(dummy);
  3550.               if (!cProto || !cProto.attached) {
  3551.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  3552.                 return;
  3553.               }
  3554.  
  3555.               let doHack = false;
  3556.               if (typeof cProto.animateScroll_ === 'function') {
  3557.  
  3558.                 // not cancellable
  3559.                 console.log('animateScroll_', typeof cProto.animateScroll_)
  3560.  
  3561.                 doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  3562.  
  3563.               }
  3564.  
  3565.               if (doHack) {
  3566.  
  3567.                 const querySelector = HTMLElement.prototype.querySelector;
  3568.                 const U = (element) => ({
  3569.                   querySelector: (selector) => querySelector.call(element, selector)
  3570.                 });
  3571.  
  3572.                 cProto.animateScroll_ = function (a) {
  3573.                   // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  3574.                   if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  3575.                   this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  3576.                   a -= this.lastAnimationTime_;
  3577.                   200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  3578.                     rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  3579.                       this.animationEnd_ = this.animationStart_ = null,
  3580.                       this.lastAnimationTime_ = 0);
  3581.                   this.updateButtons_()
  3582.                 }
  3583.  
  3584.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  3585.               } else {
  3586.  
  3587.                 console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  3588.               }
  3589.  
  3590.             })();
  3591.  
  3592.             console.log("[End]");
  3593.  
  3594.             console.groupEnd();
  3595.           });
  3596.         }
  3597.  
  3598.         if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  3599.  
  3600.  
  3601.           customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  3602.  
  3603.             mightFirstCheckOnYtInit();
  3604.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  3605.             console.log("[Begin]");
  3606.             (() => {
  3607.  
  3608.               const tag = "yt-live-chat-docked-message"
  3609.               const dummy = document.createElement(tag);
  3610.  
  3611.               const cProto = getProto(dummy);
  3612.               if (!cProto || !cProto.attached) {
  3613.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  3614.                 return;
  3615.               }
  3616.  
  3617.               let doHack = false;
  3618.               if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  3619.  
  3620.                 // cancelable - this.intersectRAF <detached>
  3621.                 // yt-live-chat-docked-message
  3622.                 // boundCheckIntersections <-> checkIntersections
  3623.                 // onDockableMessagesChanged
  3624.                 //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  3625.  
  3626.                 console.log('detached', typeof cProto.detached)
  3627.                 console.log('checkIntersections', typeof cProto.checkIntersections)
  3628.                 console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  3629.  
  3630.                 doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  3631.  
  3632.               }
  3633.  
  3634.               if (doHack) {
  3635.  
  3636.                 cProto.checkIntersections = function () {
  3637.                   console.log('cProto.checkIntersections', tag)
  3638.                   if (this.dockableMessages.length) {
  3639.                     this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  3640.                     var a = this.dockableMessages[0]
  3641.                       , b = this.hostElement.getBoundingClientRect();
  3642.                     a = a.getBoundingClientRect();
  3643.                     var c = a.top - b.top
  3644.                       , d = 8 >= c;
  3645.                     c = 8 >= c - this.hostElement.clientHeight;
  3646.                     if (d) {
  3647.                       for (var e; d;) {
  3648.                         e = this.dockableMessages.shift();
  3649.                         d = this.dockableMessages[0];
  3650.                         if (!d)
  3651.                           break;
  3652.                         d = d.getBoundingClientRect();
  3653.                         c = d.top - b.top;
  3654.                         var f = 8 >= c;
  3655.                         if (8 >= c - a.height)
  3656.                           if (f)
  3657.                             a = d;
  3658.                           else
  3659.                             return;
  3660.                         d = f
  3661.                       }
  3662.                       this.dock(e)
  3663.                     } else
  3664.                       c && this.dockedItem && this.clear()
  3665.                   } else
  3666.                     this.intersectRAF = 0
  3667.                 }
  3668.  
  3669.                 cProto.onDockableMessagesChanged = function () {
  3670.                   // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  3671.                   this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  3672.                 }
  3673.  
  3674.                 cProto.detached = function () {
  3675.                   this.intersectRAF && rafHub.cancel(this.intersectRAF)
  3676.                 }
  3677.  
  3678.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  3679.               } else {
  3680.  
  3681.                 console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  3682.               }
  3683.  
  3684.             })();
  3685.  
  3686.             console.log("[End]");
  3687.  
  3688.             console.groupEnd();
  3689.  
  3690.           });
  3691.  
  3692.         }
  3693.  
  3694.         if(FIX_SETSRC_AND_THUMBNAILCHANGE_){
  3695.  
  3696.  
  3697.           customElements.whenDefined("yt-img-shadow").then(() => {
  3698.  
  3699.             mightFirstCheckOnYtInit();
  3700.             groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  3701.             console.log("[Begin]");
  3702.             (() => {
  3703.  
  3704.               const tag = "yt-img-shadow"
  3705.               const dummy = document.createElement(tag);
  3706.  
  3707.               const cProto = getProto(dummy);
  3708.               if (!cProto || !cProto.attached) {
  3709.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  3710.                 return;
  3711.               }
  3712.  
  3713.               if(typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_){
  3714.  
  3715.                 cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  3716.                 cProto.thumbnailChanged_ = function(a){
  3717.  
  3718.                   if(this.oldThumbnail_){
  3719.  
  3720.                     /*
  3721.                     console.log('old', this.oldThumbnail_.thumbnails)
  3722.                     console.log('new', this.thumbnail.thumbnails)
  3723.                     console.log(3466, this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails)
  3724.                     */
  3725.                     if( this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  3726.                   }
  3727.                   return this.thumbnailChanged66_.apply(this,arguments)
  3728.  
  3729.                 }
  3730.                 console.log("cProto.thumbnailChanged_ - OK");
  3731.  
  3732.               }else{
  3733.                 console.log("cProto.thumbnailChanged_ - NG");
  3734.  
  3735.               }
  3736.               if(typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_){
  3737.                 console.log("cProto.setSrc_ - OK");
  3738.  
  3739.                 cProto.setSrc66_ = cProto.setSrc_;
  3740.                 cProto.setSrc_ = function(a){
  3741.  
  3742.  
  3743.                   
  3744.                   let toSet = true;
  3745.  
  3746.                   if(this.$.img.src=== a) toSet = false; 
  3747.                   else{
  3748.  
  3749.                     /*
  3750.                     const isEmoji = a.includes('/emoji/');
  3751.                     const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3752.   
  3753.   
  3754.                     if(pretechedSet.size>0){
  3755.                       if(!pretechedSet.has(a)) toSet = false; 
  3756.                     }
  3757.                     */
  3758.                     
  3759.                   }
  3760.  
  3761.  
  3762.                   // console.log( toSet, this.$.img.src=== a, this.$.img.src, a)
  3763.  
  3764.                   if(!toSet) return;
  3765.  
  3766.                   return this.setSrc66_.apply(this,arguments)
  3767.  
  3768.                 }
  3769.  
  3770.               }else{
  3771.  
  3772.                 console.log("cProto.setSrc_ - NG");
  3773.               }
  3774.  
  3775.             })();
  3776.  
  3777.             console.log("[End]");
  3778.  
  3779.             console.groupEnd();
  3780.  
  3781.           });
  3782.  
  3783.         }
  3784.  
  3785.         if(FIX_THUMBNAIL_DATACHANGED){
  3786.  
  3787.  
  3788.  
  3789.           customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  3790.  
  3791.             mightFirstCheckOnYtInit();
  3792.             groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  3793.             console.log("[Begin]");
  3794.             (() => {
  3795.  
  3796.               const tag = "yt-live-chat-author-badge-renderer"
  3797.               const dummy = document.createElement(tag);
  3798.  
  3799.               const cProto = getProto(dummy);
  3800.               if (!cProto || !cProto.attached) {
  3801.                 console.warn(`proto.attached for ${tag} is unavailable.`);
  3802.                 return;
  3803.               }
  3804.  
  3805.  
  3806.               if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  3807.  
  3808.  
  3809.  
  3810.                 cProto.dataChanged86 = cProto.dataChanged;
  3811.                 cProto.dataChanged = function(a){
  3812.  
  3813. /*
  3814.  
  3815.         for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  3816.             b.removeChild(b.firstChild);
  3817.         if (a)
  3818.             if (a.icon) {
  3819.                 var c = document.createElement("yt-icon");
  3820.                 "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  3821.                 c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  3822.                 b.appendChild(c)
  3823.             } else if (a.customThumbnail) {
  3824.                 c = document.createElement("img");
  3825.                 var d;
  3826.                 (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  3827.                 b.appendChild(c),
  3828.                 c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  3829.             }
  3830.  
  3831.             */
  3832.  
  3833.                   const image = ((this||0).$||0).image
  3834.                   if (image && a && image.firstElementChild) {
  3835.                     let exisiting = image.firstElementChild;
  3836.                     if (exisiting === image.lastElementChild) {
  3837.  
  3838.  
  3839.                       if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  3840.  
  3841.                         var c = exisiting;
  3842.                         if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  3843.                           if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  3844.                           if (c.defaultToFilled !== true) c.defaultToFilled = true;
  3845.                         } else {
  3846.                           let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  3847.                           if (c.icon !== p) c.icon = p;
  3848.                           if (c.defaultToFilled !== false) c.defaultToFilled = false;
  3849.                         }
  3850.                         return;
  3851.                           
  3852.                          
  3853.                       } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  3854.  
  3855.                         var c = exisiting;
  3856.                         if(a.customThumbnail.thumbnails.map(e=>e.url).includes(c.src)){
  3857.  
  3858.                           c.setAttribute("alt", this.hostElement.ariaLabel || "");
  3859.                           return;
  3860.                         }
  3861.                         /*
  3862.                         
  3863.                         var d;
  3864.                         (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  3865.                           
  3866.  
  3867.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  3868.                           */
  3869.                       }
  3870.  
  3871.  
  3872.                     }
  3873.                   }
  3874.                   return this.dataChanged86.apply(this,arguments)
  3875.  
  3876.                 }
  3877.                 console.log("cProto.dataChanged - OK");
  3878.  
  3879.               }else{
  3880.                 assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  3881.                 console.log("cProto.dataChanged - NG");
  3882.  
  3883.               }
  3884.  
  3885.             })();
  3886.  
  3887.             console.log("[End]");
  3888.  
  3889.             console.groupEnd();
  3890.  
  3891.           });
  3892.  
  3893.           
  3894.         }
  3895.  
  3896.  
  3897.       }
  3898.  
  3899.       promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  3900.  
  3901.  
  3902.     })();
  3903.  
  3904.  
  3905.   });
  3906.  
  3907. })({ IntersectionObserver });

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