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YouTube 超快聊天

YouTube直播聊天的终极性能提升

目前为 2023-08-22 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name                YouTube Super Fast Chat
  3. // @version             0.40.1
  4. // @license             MIT
  5. // @name:ja             YouTube スーパーファーストチャット
  6. // @name:zh-TW          YouTube 超快聊天
  7. // @name:zh-CN          YouTube 超快聊天
  8. // @icon                https://github.com/cyfung1031/userscript-supports/raw/main/icons/super-fast-chat.png
  9. // @namespace           UserScript
  10. // @match               https://www.youtube.com/live_chat*
  11. // @match               https://www.youtube.com/live_chat_replay*
  12. // @author              CY Fung
  13. // @run-at              document-start
  14. // @grant               none
  15. // @unwrap
  16. // @allFrames           true
  17. // @inject-into         page
  18. //
  19. // @compatible          firefox Violentmonkey
  20. // @compatible          firefox Tampermonkey
  21. // @compatible          firefox FireMonkey
  22. // @compatible          chrome Violentmonkey
  23. // @compatible          chrome Tampermonkey
  24. // @compatible          opera Violentmonkey
  25. // @compatible          opera Tampermonkey
  26. // @compatible          safari Stay
  27. // @compatible          edge Violentmonkey
  28. // @compatible          edge Tampermonkey
  29. // @compatible          brave Violentmonkey
  30. // @compatible          brave Tampermonkey
  31. //
  32. // @description         Ultimate Performance Boost for YouTube Live Chats
  33. // @description:ja      YouTubeのライブチャットの究極のパフォーマンスブースト
  34. // @description:zh-TW   YouTube直播聊天的終極性能提升
  35. // @description:zh-CN   YouTube直播聊天的终极性能提升
  36. //
  37. // ==/UserScript==
  38.  
  39. ((__CONTEXT__) => {
  40.   'use strict';
  41.  
  42.   const ENABLE_REDUCED_MAXITEMS_FOR_FLUSH = true;         // TRUE to enable trimming down to MAX_ITEMS_FOR_FULL_FLUSH (25) messages when there are too many unrendered messages
  43.   const MAX_ITEMS_FOR_TOTAL_DISPLAY = 90;                 // By default, 250 latest messages will be displayed, but displaying MAX_ITEMS_FOR_TOTAL_DISPLAY (90) messages is already sufficient.
  44.   const MAX_ITEMS_FOR_FULL_FLUSH = 25;                    // If there are too many new (stacked) messages not yet rendered, clean all and flush MAX_ITEMS_FOR_FULL_FLUSH (25) latest messages then incrementally added back to MAX_ITEMS_FOR_TOTAL_DISPLAY (90) messages
  45.  
  46.   const ENABLE_NO_SMOOTH_TRANSFORM = true;                // Depends on whether you want the animation effect for new chat messages
  47.   const USE_OPTIMIZED_ON_SCROLL_ITEMS = true;             // TRUE for the majority
  48.   const USE_WILL_CHANGE_CONTROLLER = false;               // FALSE for the majority
  49.   const ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED = true;  // In Chrome, the rendering of new chat messages could be too fast for no smooth transform. 80ms delay of displaying new messages should be sufficient for element rendering.
  50.   const ENABLE_OVERFLOW_ANCHOR_PREFERRED = true;          // Enable `overflow-anchor: auto` to lock the scroll list at the bottom for no smooth transform.
  51.  
  52.   const FIX_SHOW_MORE_BUTTON_LOCATION = true;             // When there are voting options (bottom panel), move the "show more" button to the top.
  53.   const FIX_INPUT_PANEL_OVERFLOW_ISSUE = true;            // When the super chat button is flicking with color, the scrollbar might come out.
  54.   const FIX_INPUT_PANEL_BORDER_ISSUE = true;              // No border should be allowed if there is an empty input panel.
  55.   const SET_CONTAIN_FOR_CHATROOM = true;                  // Rendering hacks (`contain`) for chatroom elements. [ General ]
  56.  
  57.   const FORCE_CONTENT_VISIBILITY_UNSET = true;            // Content-visibility should be always VISIBLE for high performance and great rendering.
  58.   const FORCE_WILL_CHANGE_UNSET = true;                   // Will-change should be always UNSET (auto) for high performance and low energy impact.
  59.  
  60.   // Replace requestAnimationFrame timers with custom implementation
  61.   const ENABLE_RAF_HACK_TICKERS = true;           // When there is a ticker
  62.   const ENABLE_RAF_HACK_DOCKED_MESSAGE = true;    // To be confirmed
  63.   const ENABLE_RAF_HACK_INPUT_RENDERER = true;    // To be confirmed
  64.   const ENABLE_RAF_HACK_EMOJI_PICKER = true;      // When changing the page of the emoji picker
  65.  
  66.   // Force rendering all the character subsets of the designated font(s) before messages come (Pre-Rendering of Text)
  67.   const ENABLE_FONT_PRE_RENDERING_PREFERRED = 1 | 2 | 4 | 8 | 16;
  68.  
  69.   // Backdrop `filter: blur(4px)` inside the iframe can extend to the whole page, causing a negative visual impact on the video you are watching.
  70.   const NO_BACKDROP_FILTER_WHEN_MENU_SHOWN = true;
  71.  
  72.   // Data Manipulation for Participants (Participant List)
  73.   // << if DO_PARTICIPANT_LIST_HACKS >>
  74.   const DO_PARTICIPANT_LIST_HACKS = true;                     // TRUE for the majority
  75.   const SHOW_PARTICIPANT_CHANGES_IN_CONSOLE = false;          // Just too annoying to show them all in popular chat
  76.   const CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = true;  // Only consider changes in renderable content (not concerned with the last chat message of the participants)
  77.   const PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED = true;
  78.   // << end >>
  79.  
  80.   // show more button
  81.   const ENABLE_SHOW_MORE_BLINKER = true;                      // BLINK WHEN NEW MESSAGES COME
  82.  
  83.   // faster stampDomArray_ for participants list creation
  84.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL = 1;            // 0 - OFF; 1 - ON; 2 - ON(PARTICIPANTS_LIST ONLY)
  85.   const USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET = false;
  86.  
  87.   // reuse yt components
  88.   const ENABLE_FLAGS_REUSE_COMPONENTS = true;
  89.  
  90.   // images <Group#I01>
  91.   const AUTHOR_PHOTO_SINGLE_THUMBNAIL = 1;  // 0 - disable; 1- smallest; 2- largest
  92.   const EMOJI_IMAGE_SINGLE_THUMBNAIL = 1;   // 0 - disable; 1- smallest; 2- largest
  93.   const LEAST_IMAGE_SIZE = 48;              // minium size = 48px
  94.  
  95.   const DO_LINK_PREFETCH = true;                      // DO NOT CHANGE
  96.   // << if DO_LINK_PREFETCH >>
  97.   const ENABLE_BASE_PREFETCHING = true;               // (SUB-)DOMAIN | dns-prefetch & preconnect
  98.   const ENABLE_PRELOAD_THUMBNAIL = true;              // subresource (prefetch) [LINK for Images]
  99.   const PREFETCH_LIMITED_SIZE_EMOJI = 512;            // DO NOT CHANGE THIS
  100.   const PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO = 68;      // DO NOT CHANGE THIS
  101.   // << end >>
  102.  
  103.   const FIX_SETSRC_AND_THUMBNAILCHANGE_ = true;       // Function Replacement for yt-img-shadow....
  104.   const FIX_THUMBNAIL_DATACHANGED = true;             // Function Replacement for yt-live-chat-author-badge-renderer..dataChanged
  105.   // const REMOVE_PRELOADAVATARFORADDACTION = false;      // Function Replacement for yt-live-chat-renderer..preloadAvatarForAddAction
  106.  
  107.   const FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION = true;     // important [depends on <Group#I01>]
  108.   const FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT = true;  // [depends on <Group#I01>]
  109.  
  110.   const ATTEMPT_ANIMATED_TICKER_BACKGROUND = 'steps'   // false OR '' for disabled, 'linear', 'steps' for easing-function
  111.   // << if ATTEMPT_ANIMATED_TICKER_BACKGROUND >>
  112.   // BROWSER SUPPORT: Chrome 75+, Edge 79+, Safari 13.1+, Firefox 63+, Opera 62+
  113.   const TICKER_MAX_STEPS_LIMIT = 500;                       //  NOT LESS THAN 5 STEPS!!
  114.   // [limiting 500 max steps] is recommended for "confortable visual change"
  115.   //      min. step increment 0.2% => max steps: 500 =>  800ms per each update
  116.   //      min. step increment 0.5% => max steps: 200 => 1000ms per each update
  117.   //      min. step increment 1.0% => max steps: 100 => 1000ms per each update
  118.   //      min. step increment 2.5% => max steps:  40 => 1000ms per each update
  119.   //      min. step increment 5.0% => max steps:  20 => 1250ms per each update
  120.   const ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX = true;    // for video playback's ticker issue. [ Playback Replay - Pause at Middle - Backwards Seeking ]
  121.   // << end >>
  122.  
  123.   const FIX_TOOLTIP_DISPLAY = true;
  124.   const USE_VANILLA_DEREF = true;
  125.   const FIX_DROPDOWN_DERAF = true;                        // DONT CHANGE
  126.  
  127.  
  128.   const CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true;        // cache the menu data and used for the next reopen
  129.   const ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU = true;        // avoid multiple requests on the same time
  130.  
  131.   const BOOST_MENU_OPENCHANGED_RENDERING = true;
  132.   const FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK = true;  // click again = close
  133.   const PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN = true; // require CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN = true
  134.   // const FIX_MENU_CAPTURE_SCROLL = true;
  135.   const CHAT_MENU_REFIT_ALONG_SCROLLING = 0;        // 0 for locking / default; 1 for unlocking only; 2 for unlocking and refit
  136.  
  137.   const RAF_FIX_keepScrollClamped = true;
  138.   const RAF_FIX_scrollIncrementally = true;
  139.  
  140.   // << if BOOST_MENU_OPENCHANGED_RENDERING >>
  141.   const FIX_MENU_POSITION_N_SIZING_ON_SHOWN = 1;       // correct size and position when the menu dropdown opens
  142.  
  143.   const DE_JSONPRUNE_FOR_readyStateChangeHandler_ = 1; // jsonPrune for Ad-Blocking is not applicable to live_chat streaming
  144.   // << end >>
  145.  
  146.  
  147.   // ========= EXPLANTION FOR 0.2% @ step timing [min. 0.2%] ===========
  148.   /*
  149.  
  150.     ### Time Approach
  151.  
  152.     // all below values can make the time interval > 250ms
  153.     // 250ms (practical value) refers to the minimum frequency for timeupdate in most browsers (typically, shorter timeupdate interval in modern browsers)
  154.     if (totalDuration > 400000) stepInterval = 0.2;  // 400000ms with 0.2% increment => 800ms
  155.     else if (totalDuration > 200000) stepInterval = 0.5; // 200000ms with 0.5% increment => 1000ms
  156.     else if (totalDuration > 100000) stepInterval = 1; // 100000ms with 1% increment => 1000ms
  157.     else if (totalDuration > 50000) stepInterval = 2; // 50000ms with 2% increment => 1000ms
  158.     else if (totalDuration > 25000) stepInterval = 5; // 25000ms with 5% increment => 1250ms
  159.  
  160.     ### Pixel Check
  161.     // Target Max Pixel Increment < 5px for Short Period Ticker (Rapid Background Change)
  162.     // Assume total width <= 99px for short period ticker, like small donation & member welcome
  163.     99px * 5% = 4.95px < 5px [Condition Fulfilled]
  164.  
  165.     ### Example - totalDuration = 280000
  166.     totalDuration 280000
  167.     stepInterval 0.5
  168.     numOfSteps = Math.round(100 / stepInterval) = 200
  169.     time interval = 280000 / 200 = 1400ms <acceptable>
  170.  
  171.     ### Example - totalDuration = 18000
  172.     totalDuration 18000
  173.     stepInterval 5
  174.     numOfSteps = Math.round(100 / stepInterval) = 20
  175.     time interval = 18000 / 20 = 900ms <acceptable>
  176.  
  177.     ### Example - totalDuration = 5000
  178.     totalDuration 5000
  179.     stepInterval 5
  180.     numOfSteps = Math.round(100 / stepInterval) = 20
  181.     time interval = 5000 / 20 = 250ms <threshold value>
  182.  
  183.     ### Example - totalDuration = 3600
  184.     totalDuration 3600
  185.     stepInterval 5
  186.     numOfSteps = Math.round(100 / stepInterval) = 20
  187.     time interval = 3600 / 20 = 180ms <reasonable for 3600ms ticker>
  188.  
  189.   */
  190.  
  191.   // =======================================================================================================
  192.  
  193.   // AUTOMAICALLY DETERMINED
  194.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL === 1;
  195.   const ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST = ENABLE_FLAGS_MAINTAIN_STABLE_LIST_VAL >= 1;
  196.   const CHAT_MENU_SCROLL_UNLOCKING = CHAT_MENU_REFIT_ALONG_SCROLLING >= 1;
  197.   let runTickerClassName = 'run-ticker';
  198.  
  199.   const dummyImgURL = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
  200.   /*
  201.     WebP: data:image/webp;base64,UklGRjAB
  202.     PNG: data:image/png;base64,iVBORw0KGg==
  203.     JPEG: data:image/jpeg;base64,/9j/4AA=
  204.     GIF: data:image/gif;base64,R0lGODlhAQABAIA=
  205.     BMP: data:image/bmp;base64,Qk1oAAAA
  206.     SVG: data:image/svg+xml;base64,PHN2Zy8+Cg==
  207.  
  208.     WebP: data:image/webp;base64,AAAAAAA=
  209.     PNG:  data:image/png;base64,AAAAAAA=
  210.     JPEG: data:image/jpeg;base64,AAAAAAA=
  211.     GIF:  data:image/gif;base64,AAAAAAA=
  212.     BMP:  data:image/bmp;base64,AAAAAAA=
  213.  
  214.     data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
  215.  
  216.  
  217.   */
  218.  
  219.   // image sizing code
  220.   // (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null)
  221.  
  222.  
  223.   //   function KC(a, b, c, d) {
  224.   //     d = void 0 === d ? "width" : d;
  225.   //     if (!a || !a.length)
  226.   //         return null;
  227.   //     if (z("kevlar_tuner_should_always_use_device_pixel_ratio")) {
  228.   //         var e = window.devicePixelRatio;
  229.   //         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"));
  230.   //         HC = e
  231.   //     } else
  232.   //         HC || (HC = window.devicePixelRatio);
  233.   //     e = HC;
  234.   //     z("kevlar_tuner_should_always_use_device_pixel_ratio") ? b *= e : 1 < e && (b *= e);
  235.   //     if (z("kevlar_tuner_min_thumbnail_quality"))
  236.   //         return a[0].url || null;
  237.   //     e = a.length;
  238.   //     if (z("kevlar_tuner_max_thumbnail_quality"))
  239.   //         return a[e - 1].url || null;
  240.   //     if (c)
  241.   //         for (var h = 0; h < e; h++)
  242.   //             if (0 <= a[h].url.indexOf(c))
  243.   //                 return a[h].url || null;
  244.   //     for (c = 0; c < e; c++)
  245.   //         if (a[c][d] >= b)
  246.   //             return a[c].url || null;
  247.   //     for (b = e - 1; 0 < b; b--)
  248.   //         if (a[b][d])
  249.   //             return a[b].url || null;
  250.   //     return a[0].url || null
  251.   // }
  252.  
  253.   const { IntersectionObserver } = __CONTEXT__;
  254.  
  255.   /** @type {globalThis.PromiseConstructor} */
  256.   const Promise = (async () => { })().constructor; // YouTube hacks Promise in WaterFox Classic and "Promise.resolve(0)" nevers resolve.
  257.  
  258.   let jsonParseFix = null;
  259.  
  260.   if (!IntersectionObserver) return console.warn("Your browser does not support IntersectionObserver.\nPlease upgrade to the latest version.");
  261.   if (typeof WebAssembly !== 'object') return console.warn("Your browser is too old.\nPlease upgrade to the latest version."); // for passive and once
  262.  
  263.   // necessity of cssText3_smooth_transform_position to be checked.
  264.   const cssText3_smooth_transform_position = ENABLE_NO_SMOOTH_TRANSFORM ? `
  265.  
  266.     #item-offset.style-scope.yt-live-chat-item-list-renderer > #items.style-scope.yt-live-chat-item-list-renderer {
  267.         position: static !important;
  268.     }
  269.  
  270.   `: '';
  271.  
  272.   // fallback if dummy style fn fails
  273.   const cssText4_smooth_transform_forced_props = ENABLE_NO_SMOOTH_TRANSFORM ? `
  274.  
  275.     /* optional */
  276.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  277.         height: auto !important;
  278.         min-height: unset !important;
  279.     }
  280.  
  281.     #items.style-scope.yt-live-chat-item-list-renderer {
  282.         transform: translateY(0px) !important;
  283.     }
  284.  
  285.     /* optional */
  286.  
  287.   `: '';
  288.  
  289.   const cssText5 = SET_CONTAIN_FOR_CHATROOM ? `
  290.  
  291.     /* ------------------------------------------------------------------------------------------------------------- */
  292.  
  293.     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 {
  294.         contain: layout style;
  295.     }
  296.  
  297.     #items.style-scope.yt-live-chat-item-list-renderer {
  298.         contain: layout paint style;
  299.     }
  300.  
  301.     #item-offset.style-scope.yt-live-chat-item-list-renderer {
  302.         contain: style;
  303.     }
  304.  
  305.     #item-scroller.style-scope.yt-live-chat-item-list-renderer {
  306.         contain: size style;
  307.     }
  308.  
  309.     #contents.style-scope.yt-live-chat-item-list-renderer, #chat.style-scope.yt-live-chat-renderer, img.style-scope.yt-img-shadow[width][height] {
  310.         contain: size layout paint style;
  311.     }
  312.  
  313.     .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label], .style-scope.yt-live-chat-ticker-renderer[role="button"][aria-label] > #container {
  314.         contain: layout paint style;
  315.     }
  316.  
  317.     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 {
  318.         contain: layout style;
  319.     }
  320.  
  321.     tp-yt-paper-tooltip[style*="inset"][role="tooltip"] {
  322.         contain: layout paint style;
  323.     }
  324.  
  325.     /* ------------------------------------------------------------------------------------------------------------- */
  326.  
  327.   ` : '';
  328.  
  329.   const cssText6b_show_more_button = FIX_SHOW_MORE_BUTTON_LOCATION ? `
  330.  
  331.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer{
  332.         top: 4px;
  333.         transition-property: top;
  334.         bottom: unset;
  335.     }
  336.  
  337.     yt-live-chat-renderer[has-action-panel-renderer] #show-more.yt-live-chat-item-list-renderer[disabled]{
  338.         top: -42px;
  339.     }
  340.  
  341.   `: '';
  342.  
  343.   const cssText6c_input_panel_overflow = FIX_INPUT_PANEL_OVERFLOW_ISSUE ? `
  344.  
  345.     #input-panel #picker-buttons yt-live-chat-icon-toggle-button-renderer#product-picker {
  346.         contain: layout style;
  347.     }
  348.  
  349.     #chat.yt-live-chat-renderer ~ #panel-pages.yt-live-chat-renderer {
  350.         overflow: visible;
  351.     }
  352.  
  353.   `: '';
  354.  
  355.   const cssText6d_input_panel_border = FIX_INPUT_PANEL_BORDER_ISSUE ? `
  356.  
  357.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer:not(:empty) {
  358.         --yt-live-chat-action-panel-top-border: none;
  359.     }
  360.  
  361.     html #panel-pages.yt-live-chat-renderer > #input-panel.yt-live-chat-renderer.iron-selected > *:first-child {
  362.         border-top: 1px solid var(--yt-live-chat-panel-pages-border-color);
  363.     }
  364.  
  365.     html #panel-pages.yt-live-chat-renderer {
  366.         border-top: 0;
  367.         border-bottom: 0;
  368.     }
  369.  
  370.   `: '';
  371.  
  372.   const cssText7b_content_visibility_unset = FORCE_CONTENT_VISIBILITY_UNSET ? `
  373.  
  374.     img,
  375.     yt-img-shadow[height][width],
  376.     yt-img-shadow {
  377.         content-visibility: visible !important;
  378.     }
  379.  
  380.   `  : '';
  381.  
  382.   const cssText7c_will_change_unset = FORCE_WILL_CHANGE_UNSET ? `
  383.  
  384.     /* remove YouTube constant will-change */
  385.     /* constant value will slow down the performance; default auto */
  386.  
  387.     /* www-player.css */
  388.     html .ytp-contextmenu,
  389.     html .ytp-settings-menu {
  390.         will-change: unset;
  391.     }
  392.  
  393.     /* frequently matched elements */
  394.     html .fill.yt-interaction,
  395.     html .stroke.yt-interaction,
  396.     html .yt-spec-touch-feedback-shape__fill,
  397.     html .yt-spec-touch-feedback-shape__stroke {
  398.         will-change: unset;
  399.     }
  400.  
  401.     /* live_chat_polymer.js */
  402.     /*
  403.     html .toggle-button.tp-yt-paper-toggle-button,
  404.     html #primaryProgress.tp-yt-paper-progress,
  405.     html #secondaryProgress.tp-yt-paper-progress,
  406.     html #onRadio.tp-yt-paper-radio-button,
  407.     html .fill.yt-interaction,
  408.     html .stroke.yt-interaction,
  409.     html .yt-spec-touch-feedback-shape__fill,
  410.     html .yt-spec-touch-feedback-shape__stroke {
  411.         will-change: unset;
  412.     }
  413.     */
  414.  
  415.     /* desktop_polymer_enable_wil_icons.js */
  416.     /* html .fill.yt-interaction,
  417.     html .stroke.yt-interaction, */
  418.     html tp-yt-app-header::before,
  419.     html tp-yt-iron-list,
  420.     html #items.tp-yt-iron-list > *,
  421.     html #onRadio.tp-yt-paper-radio-button,
  422.     html .toggle-button.tp-yt-paper-toggle-button,
  423.     html ytd-thumbnail-overlay-toggle-button-renderer[use-expandable-tooltip] #label.ytd-thumbnail-overlay-toggle-button-renderer,
  424.     html #items.ytd-post-multi-image-renderer,
  425.     html #items.ytd-horizontal-card-list-renderer,
  426.     html #items.yt-horizontal-list-renderer,
  427.     html #left-arrow.yt-horizontal-list-renderer,
  428.     html #right-arrow.yt-horizontal-list-renderer,
  429.     html #items.ytd-video-description-infocards-section-renderer,
  430.     html #items.ytd-video-description-music-section-renderer,
  431.     html #chips.ytd-feed-filter-chip-bar-renderer,
  432.     html #chips.yt-chip-cloud-renderer,
  433.     html #items.ytd-merch-shelf-renderer,
  434.     html #items.ytd-product-details-image-carousel-renderer,
  435.     html ytd-video-preview,
  436.     html #player-container.ytd-video-preview,
  437.     html #primaryProgress.tp-yt-paper-progress,
  438.     html #secondaryProgress.tp-yt-paper-progress,
  439.     html ytd-miniplayer[enabled] /* ,
  440.     html .yt-spec-touch-feedback-shape__fill,
  441.     html .yt-spec-touch-feedback-shape__stroke */ {
  442.         will-change: unset;
  443.     }
  444.  
  445.     /* other */
  446.     .ytp-videowall-still-info-content[class],
  447.     .ytp-suggestion-image[class] {
  448.         will-change: unset !important;
  449.     }
  450.  
  451.   ` : '';
  452.  
  453.   const ENABLE_FONT_PRE_RENDERING = typeof HTMLElement.prototype.append === 'function' ? (ENABLE_FONT_PRE_RENDERING_PREFERRED || 0) : 0;
  454.   const cssText8_fonts_pre_render = ENABLE_FONT_PRE_RENDERING ? `
  455.  
  456.     elzm-fonts {
  457.         visibility: collapse;
  458.         position: fixed;
  459.         top: -10px;
  460.         left: -10px;
  461.         font-size: 10pt;
  462.         line-height: 100%;
  463.         width: 100px;
  464.         height: 100px;
  465.         transform: scale(0.1);
  466.         transform: scale(0.01);
  467.         transform: scale(0.001);
  468.         transform-origin: 0 0;
  469.         contain: strict;
  470.         display: block;
  471.  
  472.         pointer-events: none !important;
  473.         user-select: none !important;
  474.     }
  475.  
  476.     elzm-fonts[id]#elzm-fonts-yk75g {
  477.         user-select: none !important;
  478.         pointer-events: none !important;
  479.     }
  480.  
  481.     elzm-font {
  482.         visibility: collapse;
  483.         position: absolute;
  484.         line-height: 100%;
  485.         width: 100px;
  486.         height: 100px;
  487.         contain: strict;
  488.         display: block;
  489.  
  490.         user-select: none !important;
  491.         pointer-events: none !important;
  492.     }
  493.  
  494.     elzm-font::before {
  495.         visibility: collapse;
  496.         position: absolute;
  497.         line-height: 100%;
  498.         width: 100px;
  499.         height: 100px;
  500.         contain: strict;
  501.         display: block;
  502.  
  503.         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';
  504.  
  505.         user-select: none !important;
  506.         pointer-events: none !important;
  507.     }
  508.  
  509.   `: '';
  510.  
  511.   const cssText9_no_backdrop_filter_when_menu_shown = NO_BACKDROP_FILTER_WHEN_MENU_SHOWN ? `
  512.     tp-yt-iron-dropdown.yt-live-chat-app ytd-menu-popup-renderer  {
  513.         -webkit-backdrop-filter: none;
  514.         backdrop-filter: none;
  515.     }
  516.   `: '';
  517.  
  518.   const cssText10_show_more_blinker = ENABLE_SHOW_MORE_BLINKER ? `
  519.  
  520.     @keyframes blinker-miuzp {
  521.         0%, 60%, 100% {
  522.             opacity: 1;
  523.         }
  524.         30% {
  525.             opacity: 0.6;
  526.         }
  527.     }
  528.  
  529.     yt-icon-button#show-more.has-new-messages-miuzp {
  530.         animation: blinker-miuzp 1.74s linear infinite;
  531.     }
  532.  
  533.   `: '';
  534.  
  535.  
  536.   const addCss = () => `
  537.  
  538.   @property --ticker-rtime {
  539.     syntax: "<percentage>";
  540.     inherits: false;
  541.     initial-value: 0%;
  542.   }
  543.  
  544.   /*
  545.   .run-ticker {
  546.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  547.   }
  548.  
  549.   .run-ticker-test {
  550.     background: #00000001;
  551.   }
  552.  
  553.   .run-ticker-forced,
  554.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker-forced,
  555.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker-forced[class]
  556.   {
  557.     background:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2)) !important;
  558.   }
  559.   */
  560.  
  561.   .run-ticker {
  562.     --ticker-bg:linear-gradient(90deg, var(--ticker-c1),var(--ticker-c1) var(--ticker-rtime),var(--ticker-c2) var(--ticker-rtime),var(--ticker-c2));
  563.   }
  564.  
  565.   .run-ticker,
  566.   yt-live-chat-ticker-renderer #items > * > #container.run-ticker,
  567.   yt-live-chat-ticker-renderer[class] #items[class] > *[class] > #container.run-ticker[class]
  568.   {
  569.     background: var(--ticker-bg) !important;
  570.   }
  571.  
  572.   yt-live-chat-ticker-dummy777-item-renderer {
  573.     background: #00000001;
  574.   }
  575.  
  576.   yt-live-chat-ticker-dummy777-item-renderer[dummy777] {
  577.     position: fixed !important;
  578.     top: -1000px !important;
  579.     left: -1000px !important;
  580.     font-size: 1px !important;
  581.     color: transparent !important;
  582.     pointer-events: none !important;
  583.     z-index: -1 !important;
  584.     contain: strict !important;
  585.     box-sizing: border-box !important;
  586.     pointer-events: none !important;
  587.     user-select: none !important;
  588.     max-width: 1px !important;
  589.     max-height: 1px !important;
  590.     overflow: hidden !important;
  591.     visibility: collapse !important;
  592.     display: none !important;
  593.   }
  594.  
  595.   yt-live-chat-ticker-dummy777-item-renderer #container {
  596.     background: inherit;
  597.   }
  598.  
  599.  
  600.   ${cssText8_fonts_pre_render}
  601.  
  602.   ${cssText9_no_backdrop_filter_when_menu_shown}
  603.  
  604.   @supports (contain: layout paint style) {
  605.  
  606.     ${cssText5}
  607.  
  608.   }
  609.  
  610.   @supports (color: var(--general)) {
  611.  
  612.     html {
  613.         --yt-live-chat-item-list-renderer-padding: 0px 0px;
  614.     }
  615.  
  616.     ${cssText3_smooth_transform_position}
  617.  
  618.     ${cssText7c_will_change_unset}
  619.  
  620.     ${cssText7b_content_visibility_unset}
  621.  
  622.     yt-live-chat-item-list-renderer:not([allow-scroll]) #item-scroller.yt-live-chat-item-list-renderer {
  623.         overflow-y: scroll;
  624.         padding-right: 0;
  625.     }
  626.  
  627.     ${cssText4_smooth_transform_forced_props}
  628.  
  629.     yt-icon[icon="down_arrow"] > *, yt-icon-button#show-more > * {
  630.         pointer-events: none !important;
  631.     }
  632.  
  633.     #continuations, #continuations * {
  634.         contain: strict;
  635.         position: fixed;
  636.         top: 2px;
  637.         height: 1px;
  638.         width: 2px;
  639.         height: 1px;
  640.         visibility: collapse;
  641.     }
  642.  
  643.     ${cssText6b_show_more_button}
  644.  
  645.     ${cssText6d_input_panel_border}
  646.  
  647.     ${cssText6c_input_panel_overflow}
  648.  
  649.   }
  650.  
  651.  
  652.   @supports (overflow-anchor: auto) {
  653.  
  654.     .no-anchor * {
  655.         overflow-anchor: none;
  656.     }
  657.     .no-anchor > item-anchor {
  658.         overflow-anchor: auto;
  659.     }
  660.  
  661.     item-anchor {
  662.  
  663.         height:1px;
  664.         width: 100%;
  665.         transform: scaleY(0.00001);
  666.         transform-origin:0 0;
  667.         contain: strict;
  668.         opacity:0;
  669.         display:flex;
  670.         position:relative;
  671.         flex-shrink:0;
  672.         flex-grow:0;
  673.         margin-bottom:0;
  674.         overflow:hidden;
  675.         box-sizing:border-box;
  676.         visibility: visible;
  677.         content-visibility: visible;
  678.         contain-intrinsic-size: auto 1px;
  679.         pointer-events:none !important;
  680.  
  681.     }
  682.  
  683.     #item-scroller.style-scope.yt-live-chat-item-list-renderer[class] {
  684.         overflow-anchor: initial !important; /* whenever ENABLE_OVERFLOW_ANCHOR or not */
  685.     }
  686.  
  687.     html item-anchor {
  688.  
  689.         height: 1px;
  690.         width: 1px;
  691.         top: auto;
  692.         left: auto;
  693.         right: auto;
  694.         bottom: auto;
  695.         transform: translateY(-1px);
  696.         position: absolute;
  697.         z-index: -1;
  698.  
  699.     }
  700.  
  701.   }
  702.  
  703.   @supports (color: var(--pre-rendering)) {
  704.  
  705.     @keyframes dontRenderAnimation {
  706.         0% {
  707.             background-position-x: 3px;
  708.         }
  709.         100% {
  710.             background-position-x: 4px;
  711.         }
  712.     }
  713.  
  714.     .dont-render[class] {
  715.         /* visibility: collapse !important; */
  716.         /* visibility: collapse will make innerText become "" which conflicts with BetterStreamChat; see https://greasyfork.org/scripts/469878/discussions/197267 */
  717.  
  718.         transform: scale(0.01) !important;
  719.         transform: scale(0.00001) !important;
  720.         transform: scale(0.0000001) !important;
  721.         transform-origin: 0 0 !important;
  722.         z-index: -1 !important;
  723.         contain: strict !important;
  724.         box-sizing: border-box !important;
  725.  
  726.         height: 1px !important;
  727.         height: 0.1px !important;
  728.         height: 0.01px !important;
  729.         height: 0.0001px !important;
  730.         height: 0.000001px !important;
  731.  
  732.         animation: dontRenderAnimation 1ms linear 80ms 1 normal forwards !important;
  733.  
  734.         pointer-events: none !important;
  735.         user-select: none !important;
  736.  
  737.     }
  738.  
  739.     #sk35z {
  740.       display: block !important;
  741.  
  742.       visibility: collapse !important;
  743.  
  744.       transform: scale(0.01) !important;
  745.       transform: scale(0.00001) !important;
  746.       transform: scale(0.0000001) !important;
  747.       transform-origin: 0 0 !important;
  748.       z-index: -1 !important;
  749.       contain: strict !important;
  750.       box-sizing: border-box !important;
  751.  
  752.       height: 1px !important;
  753.       height: 0.1px !important;
  754.       height: 0.01px !important;
  755.       height: 0.0001px !important;
  756.       height: 0.000001px !important;
  757.  
  758.       position: absolute !important;
  759.       top: -1000px !important;
  760.       left: -1000px !important;
  761.  
  762.     }
  763.  
  764.   }
  765.  
  766.   [rNgzQ] {
  767.     opacity: 0.1 !important;
  768.     opacity: 0.01 !important;
  769.     opacity: 0.001 !important;
  770.     opacity: 0.0001 !important;
  771.     opacity: 0.00001 !important;
  772.     opacity: 0.00000001 !important;
  773.  
  774.     pointer-events: none !important;
  775.   }
  776.  
  777.   ${cssText10_show_more_blinker}
  778.  
  779.   `;
  780.  
  781.  
  782.   const win = typeof unsafeWindow !== 'undefined' ? unsafeWindow : (this instanceof Window ? this : window);
  783.  
  784.   // Create a unique key for the script and check if it is already running
  785.   const hkey_script = 'mchbwnoasqph';
  786.   if (win[hkey_script]) throw new Error('Duplicated Userscript Calling'); // avoid duplicated scripting
  787.   win[hkey_script] = true;
  788.  
  789.   if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  790.  
  791.     let te4 = setTimeout(() => { }); // dummy; skip timerId only;
  792.     if (te4 < 3) {
  793.       setTimeout(() => { });
  794.       setTimeout(() => { });
  795.     }
  796.  
  797.   }
  798.  
  799.   class Mutex {
  800.  
  801.     constructor() {
  802.       this.p = Promise.resolve()
  803.     }
  804.  
  805.     /**
  806.      *  @param {(lockResolve: () => void)} f
  807.      */
  808.     lockWith(f) {
  809.       this.p = this.p.then(() => new Promise(f).catch(console.warn))
  810.     }
  811.  
  812.   }
  813.  
  814.   function dr(s) {
  815.     // reserved for future use
  816.     return s;
  817.     // return window.deWeakJS ? window.deWeakJS(s) : s;
  818.   }
  819.  
  820.   const getProto = (element) => {
  821.     if (element) {
  822.       const cnt = element.inst || element;
  823.       return cnt.constructor.prototype || null;
  824.     }
  825.     return null;
  826.   }
  827.  
  828.   const assertor = (f) => f() || console.assert(false, f + "");
  829.  
  830.   const fnIntegrity = (f, d) => {
  831.     if (!f || typeof f !== 'function') {
  832.       console.warn('f is not a function', f);
  833.       return;
  834.     }
  835.     let p = f + "", s = 0, j = -1, w = 0;
  836.     for (let i = 0, l = p.length; i < l; i++) {
  837.       const t = p[i];
  838.       if (((t >= 'a' && t <= 'z') || (t >= 'A' && t <= 'Z'))) {
  839.         if (j < i - 1) w++;
  840.         j = i;
  841.       } else {
  842.         s++;
  843.       }
  844.     }
  845.     let itz = `${f.length}.${s}.${w}`;
  846.     if (!d) {
  847.       return itz;
  848.     } else {
  849.       return itz === d;
  850.     }
  851.   }
  852.  
  853.  
  854.   console.assert(MAX_ITEMS_FOR_TOTAL_DISPLAY > 0 && MAX_ITEMS_FOR_FULL_FLUSH > 0 && MAX_ITEMS_FOR_TOTAL_DISPLAY > MAX_ITEMS_FOR_FULL_FLUSH)
  855.  
  856.   let ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = false;
  857.   const isContainSupport = CSS.supports('contain', 'layout paint style');
  858.   if (!isContainSupport) {
  859.     console.warn("Your browser does not support css property 'contain'.\nPlease upgrade to the latest version.".trim());
  860.   } else {
  861.     ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE = true;
  862.   }
  863.  
  864.   let ENABLE_OVERFLOW_ANCHOR_CAPABLE = false;
  865.   const isOverflowAnchorSupport = CSS.supports('overflow-anchor', 'auto');
  866.   if (!isOverflowAnchorSupport) {
  867.     console.warn("Your browser does not support css property 'overflow-anchor'.\nPlease upgrade to the latest version.".trim());
  868.   } else {
  869.     ENABLE_OVERFLOW_ANCHOR_CAPABLE = true;
  870.   }
  871.  
  872.   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.
  873.  
  874.   const ENABLE_OVERFLOW_ANCHOR = ENABLE_OVERFLOW_ANCHOR_PREFERRED && ENABLE_OVERFLOW_ANCHOR_CAPABLE && ENABLE_NO_SMOOTH_TRANSFORM;
  875.   const ENABLE_DELAYED_CHAT_OCCURRENCE = ENABLE_DELAYED_CHAT_OCCURRENCE_PREFERRED && ENABLE_DELAYED_CHAT_OCCURRENCE_CAPABLE && ENABLE_OVERFLOW_ANCHOR && ENABLE_NO_SMOOTH_TRANSFORM && NOT_FIREFOX;
  876.  
  877.   let hasTimerModified = null;
  878.   const DO_CHECK_TICKER_BACKGROUND_OVERRIDED = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND || ENABLE_RAF_HACK_TICKERS;
  879.  
  880.   const fxOperator = (proto, propertyName) => {
  881.     let propertyDescriptorGetter = null;
  882.     try {
  883.       propertyDescriptorGetter = Object.getOwnPropertyDescriptor(proto, propertyName).get;
  884.     } catch (e) { }
  885.     return typeof propertyDescriptorGetter === 'function' ? (e) => {
  886.       try {
  887.  
  888.         return propertyDescriptorGetter.call(dr(e));
  889.       } catch (e) { }
  890.       return e[propertyName];
  891.     } : (e) => e[propertyName];
  892.   };
  893.  
  894.   const nodeParent = fxOperator(Node.prototype, 'parentNode');
  895.   // const nFirstElem = fxOperator(HTMLElement.prototype, 'firstElementChild');
  896.   const nPrevElem = fxOperator(HTMLElement.prototype, 'previousElementSibling');
  897.   const nNextElem = fxOperator(HTMLElement.prototype, 'nextElementSibling');
  898.   const nLastElem = fxOperator(HTMLElement.prototype, 'lastElementChild');
  899.  
  900.   const groupCollapsed = (text1, text2) => {
  901.  
  902.     console.groupCollapsed(`%c${text1}%c${text2}`,
  903.       "background-color: #010502; color: #6acafe; font-weight: 700; padding: 2px;",
  904.       "background-color: #010502; color: #6ad9fe; font-weight: 300; padding: 2px;"
  905.     );
  906.   }
  907.  
  908.  
  909.   const EVENT_KEY_ON_REGISTRY_READY = "ytI-ce-registry-created";
  910.   const onRegistryReady = (callback) => {
  911.     if (typeof customElements === 'undefined') {
  912.       if (!('__CE_registry' in document)) {
  913.         // https://github.com/webcomponents/polyfills/
  914.         Object.defineProperty(document, '__CE_registry', {
  915.           get() {
  916.             // return undefined
  917.           },
  918.           set(nv) {
  919.             if (typeof nv == 'object') {
  920.               delete this.__CE_registry;
  921.               this.__CE_registry = nv;
  922.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  923.             }
  924.             return true;
  925.           },
  926.           enumerable: false,
  927.           configurable: true
  928.         })
  929.       }
  930.       let eventHandler = (evt) => {
  931.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  932.         const f = callback;
  933.         callback = null;
  934.         eventHandler = null;
  935.         f();
  936.       };
  937.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  938.     } else {
  939.       callback();
  940.     }
  941.   };
  942.  
  943.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  944.  
  945.   const renderReadyPn = typeof ResizeObserver !== 'undefined' ? (sizingTarget) => {
  946.  
  947.     return new Promise(resolve => {
  948.  
  949.       let ro = new ResizeObserver(entries => {
  950.         if (entries && entries.length >= 1) {
  951.           resolve();
  952.           ro.disconnect();
  953.           ro = null;
  954.         }
  955.       });
  956.       ro.observe(sizingTarget);
  957.  
  958.  
  959.  
  960.     });
  961.  
  962.   } : (sizingTarget) => {
  963.  
  964.  
  965.     return new Promise(resolve => {
  966.  
  967.       let io = new IntersectionObserver(entries => {
  968.         if (entries && entries.length >= 1) {
  969.           resolve();
  970.           io.disconnect();
  971.           io = null;
  972.         }
  973.       });
  974.       io.observe(sizingTarget);
  975.  
  976.  
  977.  
  978.     });
  979.  
  980.   };
  981.  
  982.   /* globals WeakRef:false */
  983.  
  984.   /** @type {(o: Object | null) => WeakRef | null} */
  985.   const mWeakRef = typeof WeakRef === 'function' ? (o => o ? new WeakRef(o) : null) : (o => o || null);
  986.  
  987.   /** @type {(wr: Object | null) => Object | null} */
  988.   const kRef = (wr => (wr && wr.deref) ? wr.deref() : wr);
  989.  
  990.   const { addCssManaged } = (() => {
  991.  
  992.     const addFontPreRendering = () => {
  993.  
  994.       groupCollapsed("YouTube Super Fast Chat", " | Fonts Pre-Rendering");
  995.  
  996.       let efsContainer = document.createElement('elzm-fonts');
  997.       efsContainer.id = 'elzm-fonts-yk75g'
  998.  
  999.       const arr = [];
  1000.       let p = document.createElement('elzm-font');
  1001.       arr.push(p);
  1002.  
  1003.       if (ENABLE_FONT_PRE_RENDERING & 1) {
  1004.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1005.  
  1006.           p = document.createElement('elzm-font');
  1007.           p.style.fontWeight = size;
  1008.           arr.push(p);
  1009.         }
  1010.       }
  1011.  
  1012.       if (ENABLE_FONT_PRE_RENDERING & 2) {
  1013.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1014.  
  1015.           p = document.createElement('elzm-font');
  1016.           p.style.fontFamily = 'Roboto';
  1017.           p.style.fontWeight = size;
  1018.           arr.push(p);
  1019.         }
  1020.       }
  1021.  
  1022.       if (ENABLE_FONT_PRE_RENDERING & 4) {
  1023.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1024.  
  1025.           p = document.createElement('elzm-font');
  1026.           p.style.fontFamily = '"YouTube Noto",Roboto,Arial,Helvetica,sans-serif';
  1027.           p.style.fontWeight = size;
  1028.           arr.push(p);
  1029.         }
  1030.       }
  1031.  
  1032.  
  1033.       if (ENABLE_FONT_PRE_RENDERING & 8) {
  1034.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1035.  
  1036.           p = document.createElement('elzm-font');
  1037.           p.style.fontFamily = '"Noto",Roboto,Arial,Helvetica,sans-serif';
  1038.           p.style.fontWeight = size;
  1039.           arr.push(p);
  1040.         }
  1041.       }
  1042.  
  1043.  
  1044.       if (ENABLE_FONT_PRE_RENDERING & 16) {
  1045.         for (const size of [100, 200, 300, 400, 500, 600, 700, 800, 900]) {
  1046.  
  1047.           p = document.createElement('elzm-font');
  1048.           p.style.fontFamily = 'sans-serif';
  1049.           p.style.fontWeight = size;
  1050.           arr.push(p);
  1051.         }
  1052.       }
  1053.  
  1054.       console.log('number of elzm-font elements', arr.length);
  1055.  
  1056.       HTMLElement.prototype.append.apply(efsContainer, arr);
  1057.  
  1058.       (document.body || document.documentElement).appendChild(efsContainer);
  1059.  
  1060.  
  1061.       console.log('elzm-font elements have been added to the page for rendering.');
  1062.  
  1063.       console.groupEnd();
  1064.  
  1065.     }
  1066.  
  1067.     let isCssAdded = false;
  1068.  
  1069.     function addCssElement() {
  1070.       let s = document.createElement('style');
  1071.       s.id = 'ewRvC';
  1072.       return s;
  1073.     }
  1074.  
  1075.     const addCssManaged = () => {
  1076.       if (!isCssAdded && document.documentElement && document.head) {
  1077.         isCssAdded = true;
  1078.         document.head.appendChild(dr(addCssElement())).textContent = addCss();
  1079.         if (ENABLE_FONT_PRE_RENDERING) {
  1080.           Promise.resolve().then(addFontPreRendering)
  1081.         }
  1082.       }
  1083.     }
  1084.  
  1085.     return { addCssManaged };
  1086.   })();
  1087.  
  1088.  
  1089.   const { setupStyle } = (() => {
  1090.  
  1091.     const sp7 = Symbol();
  1092.  
  1093.     const proxyHelperFn = (dummy) => ({
  1094.  
  1095.       get(target, prop) {
  1096.         return (prop in dummy) ? dummy[prop] : prop === sp7 ? target : target[prop];
  1097.       },
  1098.       set(target, prop, value) {
  1099.         if (!(prop in dummy)) {
  1100.           target[prop] = value;
  1101.         }
  1102.         return true;
  1103.       },
  1104.       has(target, prop) {
  1105.         return (prop in target);
  1106.       },
  1107.       deleteProperty(target, prop) {
  1108.         return true;
  1109.       },
  1110.       ownKeys(target) {
  1111.         return Object.keys(target);
  1112.       },
  1113.       defineProperty(target, key, descriptor) {
  1114.         return Object.defineProperty(target, key, descriptor);
  1115.       },
  1116.       getOwnPropertyDescriptor(target, key) {
  1117.         return Object.getOwnPropertyDescriptor(target, key);
  1118.       },
  1119.  
  1120.     });
  1121.  
  1122.     const setupStyle = (m1, m2) => {
  1123.       if (!ENABLE_NO_SMOOTH_TRANSFORM) return;
  1124.  
  1125.       const dummy1v = {
  1126.         transform: '',
  1127.         height: '',
  1128.         minHeight: '',
  1129.         paddingBottom: '',
  1130.         paddingTop: ''
  1131.       };
  1132.  
  1133.       const dummyStyleFn = (k) => (function () { const style = this[sp7]; return style[k](...arguments); });
  1134.       for (const k of ['toString', 'getPropertyPriority', 'getPropertyValue', 'item', 'removeProperty', 'setProperty']) {
  1135.         dummy1v[k] = dummyStyleFn(k);
  1136.       }
  1137.  
  1138.       const dummy1p = proxyHelperFn(dummy1v);
  1139.       const sp1v = new Proxy(m1.style, dummy1p);
  1140.       const sp2v = new Proxy(m2.style, dummy1p);
  1141.       Object.defineProperty(m1, 'style', { get() { return sp1v }, set() { }, enumerable: true, configurable: true });
  1142.       Object.defineProperty(m2, 'style', { get() { return sp2v }, set() { }, enumerable: true, configurable: true });
  1143.       m1.removeAttribute("style");
  1144.       m2.removeAttribute("style");
  1145.  
  1146.     }
  1147.  
  1148.     return { setupStyle };
  1149.  
  1150.   })();
  1151.  
  1152.  
  1153.  
  1154.   function setThumbnails(config) {
  1155.  
  1156.     const { baseObject, thumbnails, flag0, imageLinks } = config;
  1157.  
  1158.     if (flag0 || (ENABLE_PRELOAD_THUMBNAIL && imageLinks)) {
  1159.  
  1160.  
  1161.       if (thumbnails && thumbnails.length > 0) {
  1162.         if (flag0 > 0 && thumbnails.length > 1) {
  1163.           let pSize = 0;
  1164.           let newThumbnails = [];
  1165.           for (const thumbnail of thumbnails) {
  1166.             if (!thumbnail || !thumbnail.url) continue;
  1167.             const squarePhoto = thumbnail.width === thumbnail.height && typeof thumbnail.width === 'number';
  1168.             const condSize = pSize <= 0 || (flag0 === 1 ? pSize > thumbnail.width : pSize < thumbnail.width);
  1169.             const leastSizeFulfilled = squarePhoto ? thumbnail.width >= LEAST_IMAGE_SIZE : true;
  1170.             if ((!squarePhoto || condSize) && leastSizeFulfilled) {
  1171.               newThumbnails.push(thumbnail);
  1172.               if (imageLinks) imageLinks.add(thumbnail.url);
  1173.             }
  1174.             if (squarePhoto && condSize && leastSizeFulfilled) {
  1175.               pSize = thumbnail.width;
  1176.             }
  1177.           }
  1178.           if (thumbnails.length !== newThumbnails.length && thumbnails === baseObject.thumbnails && newThumbnails.length > 0) {
  1179.             baseObject.thumbnails = newThumbnails;
  1180.           } else {
  1181.             newThumbnails.length = 0;
  1182.           }
  1183.           newThumbnails = null;
  1184.         } else {
  1185.           for (const thumbnail of thumbnails) {
  1186.             if (thumbnail && thumbnail.url) {
  1187.               if (imageLinks) imageLinks.add(thumbnail.url);
  1188.             }
  1189.           }
  1190.         }
  1191.       }
  1192.  
  1193.     }
  1194.   }
  1195.  
  1196.   function fixLiveChatItem(item, imageLinks) {
  1197.     const liveChatTextMessageRenderer = (item || 0).liveChatTextMessageRenderer || 0;
  1198.     if (liveChatTextMessageRenderer) {
  1199.       const messageRuns = (liveChatTextMessageRenderer.message || 0).runs || 0;
  1200.       if (messageRuns && messageRuns.length > 0) {
  1201.         for (const run of messageRuns) {
  1202.           const emojiImage = (((run || 0).emoji || 0).image || 0);
  1203.           setThumbnails({
  1204.             baseObject: emojiImage,
  1205.             thumbnails: emojiImage.thumbnails,
  1206.             flag0: EMOJI_IMAGE_SINGLE_THUMBNAIL,
  1207.             imageLinks
  1208.           });
  1209.         }
  1210.       }
  1211.       const authorPhoto = liveChatTextMessageRenderer.authorPhoto || 0;
  1212.       setThumbnails({
  1213.         baseObject: authorPhoto,
  1214.         thumbnails: authorPhoto.thumbnails,
  1215.         flag0: AUTHOR_PHOTO_SINGLE_THUMBNAIL,
  1216.         imageLinks
  1217.       });
  1218.     }
  1219.   }
  1220.  
  1221.  
  1222.   const flagsFnOnInterval = (ENABLE_FLAGS_MAINTAIN_STABLE_LIST || ENABLE_FLAGS_REUSE_COMPONENTS) ? (() => {
  1223.  
  1224.     const flags = () => {
  1225.       try {
  1226.         return ytcfg.data_.EXPERIMENT_FLAGS;
  1227.       } catch (e) { }
  1228.       return null;
  1229.     };
  1230.  
  1231.     const flagsForced = () => {
  1232.       try {
  1233.         return ytcfg.data_.EXPERIMENTS_FORCED_FLAGS;
  1234.       } catch (e) { }
  1235.       return null;
  1236.     };
  1237.  
  1238.     const flagsFn = (EXPERIMENT_FLAGS) => {
  1239.  
  1240.       if (!EXPERIMENT_FLAGS) return;
  1241.  
  1242.       if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST) {
  1243.         if (USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true : true) {
  1244.           EXPERIMENT_FLAGS.kevlar_tuner_should_test_maintain_stable_list = true;
  1245.           EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list = true;
  1246.         }
  1247.       }
  1248.  
  1249.       if (ENABLE_FLAGS_REUSE_COMPONENTS) {
  1250.         EXPERIMENT_FLAGS.kevlar_tuner_should_test_reuse_components = true;
  1251.         EXPERIMENT_FLAGS.kevlar_tuner_should_reuse_components = true;
  1252.       }
  1253.  
  1254.     };
  1255.  
  1256.     const uf = (EXPERIMENT_FLAGS) => {
  1257.       if (EXPERIMENT_FLAGS === undefined) EXPERIMENT_FLAGS = flags();
  1258.       if (EXPERIMENT_FLAGS) {
  1259.         flagsFn(EXPERIMENT_FLAGS);
  1260.         flagsFn(flagsForced());
  1261.       }
  1262.     }
  1263.  
  1264.     uf();
  1265.  
  1266.     const flagsFnOnInterval = (setInterval, clearInterval) => {
  1267.  
  1268.       uf();
  1269.       let cidFlags = 0;
  1270.       let kd = 0;
  1271.       new Promise(flagResolve => {
  1272.  
  1273.         const flagTimer = () => {
  1274.           const EXPERIMENT_FLAGS = flags();
  1275.           if (!EXPERIMENT_FLAGS) return;
  1276.           uf(EXPERIMENT_FLAGS);
  1277.           if (kd > 0) return;
  1278.           kd = 1;
  1279.           const delay1000 = new Promise(resolve => setTimeout(resolve, 1000));
  1280.           const moDeferred = new Promise(resolve => {
  1281.             let mo = new MutationObserver(() => {
  1282.               if (mo) {
  1283.                 mo.disconnect();
  1284.                 mo.takeRecords();
  1285.                 mo = null;
  1286.                 resolve();
  1287.               }
  1288.             });
  1289.             mo.observe(document, { subtree: true, childList: true });
  1290.           });
  1291.           Promise.race([delay1000, moDeferred]).then(flagResolve);
  1292.         };
  1293.  
  1294.         uf();
  1295.         cidFlags = setInterval(flagTimer, 1);
  1296.       }).then(() => {
  1297.         if (cidFlags > 0) clearInterval(cidFlags);
  1298.         cidFlags = 0;
  1299.         uf();
  1300.       });
  1301.  
  1302.     }
  1303.  
  1304.     return flagsFnOnInterval;
  1305.  
  1306.   })() : null;
  1307.  
  1308.   let kptPF = null;
  1309.   const emojiPrefetched = new Set();
  1310.   const authorPhotoPrefetched = new Set();
  1311.  
  1312.   function linker(link, rel, href, _as) {
  1313.     return new Promise(resolve => {
  1314.       if (!link) link = document.createElement('link');
  1315.       link.rel = rel;
  1316.       if (_as) link.setAttribute('as', _as);
  1317.       link.onload = function () {
  1318.         resolve({
  1319.           link: this,
  1320.           success: true
  1321.         })
  1322.         this.remove();
  1323.       };
  1324.       link.onerror = function () {
  1325.         resolve({
  1326.           link: this,
  1327.           success: false
  1328.         });
  1329.         this.remove();
  1330.       };
  1331.       link.href = href;
  1332.       document.head.appendChild(link);
  1333.       link = null;
  1334.     });
  1335.   }
  1336.  
  1337.  
  1338.  
  1339.   const cleanContext = async (win) => {
  1340.     const waitFn = requestAnimationFrame; // shall have been binded to window
  1341.     try {
  1342.       let mx = 16; // MAX TRIAL
  1343.       const frameId = 'vanillajs-iframe-v1';
  1344.       /** @type {HTMLIFrameElement | null} */
  1345.       let frame = document.getElementById(frameId);
  1346.       let removeIframeFn = null;
  1347.       if (!frame) {
  1348.         frame = document.createElement('iframe');
  1349.         frame.id = 'vanillajs-iframe-v1';
  1350.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  1351.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  1352.         n.appendChild(frame);
  1353.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  1354.         const root = document.documentElement;
  1355.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  1356.         removeIframeFn = (setTimeout) => {
  1357.           const removeIframeOnDocumentReady = (e) => {
  1358.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1359.             win = null;
  1360.             setTimeout(() => {
  1361.               n.remove();
  1362.               n = null;
  1363.             }, 200);
  1364.           }
  1365.           if (document.readyState !== 'loading') {
  1366.             removeIframeOnDocumentReady();
  1367.           } else {
  1368.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  1369.           }
  1370.         }
  1371.       }
  1372.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  1373.       const fc = frame.contentWindow;
  1374.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  1375.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval } = fc;
  1376.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval };
  1377.       for (let k in res) res[k] = res[k].bind(win); // necessary
  1378.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  1379.       res.animate = HTMLElement.prototype.animate;
  1380.       jsonParseFix = {
  1381.         _JSON: fc.JSON, _parse: fc.JSON.parse
  1382.       }
  1383.       return res;
  1384.     } catch (e) {
  1385.       console.warn(e);
  1386.       return null;
  1387.     }
  1388.   };
  1389.  
  1390.   cleanContext(win).then(__CONTEXT__ => {
  1391.     if (!__CONTEXT__) return null;
  1392.  
  1393.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate } = __CONTEXT__;
  1394.  
  1395.     let aeConstructor = null;
  1396.  
  1397.     // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  1398.     let pairForPauseResume = 0; // each increasion = number of ticker
  1399.     let pairForPauseResumeM = 0;
  1400.     // << end >>
  1401.  
  1402.     // << __openedChanged82 >>
  1403.     let currentMenuPivotWR = null;
  1404.  
  1405.     // << if DO_PARTICIPANT_LIST_HACKS >>
  1406.     const beforeParticipantsMap = new WeakMap();
  1407.     // << end >>
  1408.  
  1409.  
  1410.  
  1411.     // << if onRegistryReadyForDOMOperations >>
  1412.  
  1413.     let dt0 = Date.now() - 2000;
  1414.     const dateNow = () => Date.now() - dt0;
  1415.     // let lastScroll = 0;
  1416.     // let lastLShow = 0;
  1417.     let lastWheel = 0;
  1418.     let lastMouseDown = 0;
  1419.     let lastMouseUp = 0;
  1420.     let currentMouseDown = false;
  1421.     let lastTouchDown = 0;
  1422.     let lastTouchUp = 0;
  1423.     let currentTouchDown = false;
  1424.     let lastUserInteraction = 0;
  1425.  
  1426.     let scrollChatFn = null;
  1427.  
  1428.     let skipDontRender = true; // true first; false by flushActiveItems_
  1429.     let allowDontRender = null;
  1430.  
  1431.     // ---- #items mutation ----
  1432.     let sk35zResolveFn = null;
  1433.     let firstList = true;
  1434.  
  1435.     // << end >>
  1436.  
  1437.     class RAFHub {
  1438.       constructor() {
  1439.         /** @type {number} */
  1440.         this.startAt = 8170;
  1441.         /** @type {number} */
  1442.         this.counter = 0;
  1443.         /** @type {number} */
  1444.         this.rid = 0;
  1445.         /** @type {Map<number, FrameRequestCallback>} */
  1446.         this.funcs = new Map();
  1447.         const funcs = this.funcs;
  1448.         /** @type {FrameRequestCallback} */
  1449.         this.bCallback = this.mCallback.bind(this);
  1450.         this.pClear = () => funcs.clear();
  1451.       }
  1452.       /** @param {DOMHighResTimeStamp} highResTime */
  1453.       mCallback(highResTime) {
  1454.         this.rid = 0;
  1455.         Promise.resolve().then(this.pClear);
  1456.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  1457.       }
  1458.       /** @param {FrameRequestCallback} f */
  1459.       request(f) {
  1460.         if (this.counter > 1e9) this.counter = 9;
  1461.         let cid = this.startAt + (++this.counter);
  1462.         this.funcs.set(cid, f);
  1463.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  1464.         return cid;
  1465.       }
  1466.       /** @param {number} cid */
  1467.       cancel(cid) {
  1468.         cid = +cid;
  1469.         if (cid > 0) {
  1470.           if (cid <= this.startAt) {
  1471.             return cancelAnimationFrame(cid);
  1472.           }
  1473.           if (this.rid > 0) {
  1474.             this.funcs.delete(cid);
  1475.             if (this.funcs.size === 0) {
  1476.               cancelAnimationFrame(this.rid);
  1477.               this.rid = 0;
  1478.             }
  1479.           }
  1480.         }
  1481.       }
  1482.     }
  1483.  
  1484.     function basePrefetching() {
  1485.  
  1486.       new Promise(resolve => {
  1487.  
  1488.         if (document.readyState !== 'loading') {
  1489.           resolve();
  1490.         } else {
  1491.           win.addEventListener("DOMContentLoaded", resolve, false);
  1492.         }
  1493.  
  1494.       }).then(() => {
  1495.         const hostL1 = [
  1496.           'https://www.youtube.com', 'https://googlevideo.com',
  1497.           'https://googleapis.com', 'https://accounts.youtube.com',
  1498.           'https://www.gstatic.com', 'https://ggpht.com',
  1499.           'https://yt3.ggpht.com', 'https://yt4.ggpht.com'
  1500.         ];
  1501.  
  1502.         const hostL2 = [
  1503.           'https://youtube.com',
  1504.           'https://fonts.googleapis.com', 'https://fonts.gstatic.com'
  1505.         ];
  1506.  
  1507.         let link = null;
  1508.  
  1509.         function kn() {
  1510.  
  1511.           link = document.createElement('link');
  1512.           if (link.relList && link.relList.supports) {
  1513.             kptPF = (link.relList.supports('dns-prefetch') ? 1 : 0) + (link.relList.supports('preconnect') ? 2 : 0) + (link.relList.supports('prefetch') ? 4 : 0) + (link.relList.supports('subresource') ? 8 : 0) + (link.relList.supports('preload') ? 16 : 0)
  1514.           } else {
  1515.             kptPF = 0;
  1516.           }
  1517.  
  1518.           groupCollapsed("YouTube Super Fast Chat", " | PREFETCH SUPPORTS");
  1519.           if (ENABLE_BASE_PREFETCHING) console.log('dns-prefetch', (kptPF & 1) ? 'OK' : 'NG');
  1520.           if (ENABLE_BASE_PREFETCHING) console.log('preconnect', (kptPF & 2) ? 'OK' : 'NG');
  1521.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('prefetch', (kptPF & 4) ? 'OK' : 'NG');
  1522.           // console.log('subresource', (kptPF & 8) ? 'OK' : 'NG');
  1523.           if (ENABLE_PRELOAD_THUMBNAIL) console.log('preload', (kptPF & 16) ? 'OK' : 'NG');
  1524.           console.groupEnd();
  1525.  
  1526.         }
  1527.  
  1528.         for (const h of hostL1) {
  1529.  
  1530.           if (kptPF === null) kn();
  1531.           if (ENABLE_BASE_PREFETCHING) {
  1532.             // if (kptPF & 1) {
  1533.             //   linker(link, 'dns-prefetch', h);
  1534.             //   link = null;
  1535.             // }
  1536.             if (kptPF & 2) {
  1537.               linker(link, 'preconnect', h);
  1538.               link = null;
  1539.             }
  1540.           }
  1541.         }
  1542.  
  1543.         for (const h of hostL2) {
  1544.           if (kptPF === null) kn();
  1545.           if (ENABLE_BASE_PREFETCHING) {
  1546.             if (kptPF & 1) {
  1547.               linker(link, 'dns-prefetch', h);
  1548.               link = null;
  1549.             }
  1550.           }
  1551.         }
  1552.  
  1553.       })
  1554.  
  1555.  
  1556.     }
  1557.  
  1558.     if (flagsFnOnInterval) flagsFnOnInterval(setInterval, clearInterval);
  1559.  
  1560.     if (DO_LINK_PREFETCH) basePrefetching();
  1561.  
  1562.     const { notifyPath7081 } = (() => {
  1563.       // DO_PARTICIPANT_LIST_HACKS
  1564.  
  1565.       const mutexParticipants = new Mutex();
  1566.  
  1567.       let uvid = 0;
  1568.       let r95dm = 0;
  1569.       let c95dm = -1;
  1570.  
  1571.       const foundMap = (base, content) => {
  1572.         /*
  1573.           let lastSearch = 0;
  1574.           let founds = base.map(baseEntry => {
  1575.             let search = content.indexOf(baseEntry, lastSearch);
  1576.             if (search < 0) return false;
  1577.             lastSearch = search + 1;
  1578.             return true;
  1579.           });
  1580.           return founds;
  1581.         */
  1582.         const contentSet = new Set(content);
  1583.         return base.map(baseEntry => contentSet.has(baseEntry));
  1584.  
  1585.       }
  1586.  
  1587.  
  1588.  
  1589.       const spliceIndicesFunc = (beforeParticipants, participants, idsBefore, idsAfter) => {
  1590.  
  1591.         const handler1 = {
  1592.           get(target, prop, receiver) {
  1593.             if (prop === 'object') {
  1594.               return participants; // avoid memory leakage
  1595.             }
  1596.             if (prop === 'type') {
  1597.               return 'splice';
  1598.             }
  1599.             return target[prop];
  1600.           }
  1601.         };
  1602.         const releaser = () => {
  1603.           participants = null;
  1604.         }
  1605.  
  1606.         let foundsForAfter = foundMap(idsAfter, idsBefore);
  1607.         let foundsForBefore = foundMap(idsBefore, idsAfter);
  1608.  
  1609.         let indexSplices = [];
  1610.         let contentUpdates = [];
  1611.         for (let i = 0, j = 0; i < foundsForBefore.length || j < foundsForAfter.length;) {
  1612.           if (beforeParticipants[i] === participants[j]) {
  1613.             i++; j++;
  1614.           } else if (idsBefore[i] === idsAfter[j]) {
  1615.             // content changed
  1616.             contentUpdates.push({ indexI: i, indexJ: j })
  1617.             i++; j++;
  1618.           } else {
  1619.             let addedCount = 0;
  1620.             for (let q = j; q < foundsForAfter.length; q++) {
  1621.               if (foundsForAfter[q] === false) addedCount++;
  1622.               else break;
  1623.             }
  1624.             let removedCount = 0;
  1625.             for (let q = i; q < foundsForBefore.length; q++) {
  1626.               if (foundsForBefore[q] === false) removedCount++;
  1627.               else break;
  1628.             }
  1629.             if (!addedCount && !removedCount) {
  1630.               throw 'ERROR(0xFF32): spliceIndicesFunc';
  1631.             }
  1632.             indexSplices.push(new Proxy({
  1633.               index: j,
  1634.               addedCount: addedCount,
  1635.               removed: removedCount >= 1 ? beforeParticipants.slice(i, i + removedCount) : []
  1636.             }, handler1));
  1637.             i += removedCount;
  1638.             j += addedCount;
  1639.           }
  1640.         }
  1641.         foundsForBefore = null;
  1642.         foundsForAfter = null;
  1643.         idsBefore = null;
  1644.         idsAfter = null;
  1645.         beforeParticipants = null;
  1646.         return { indexSplices, contentUpdates, releaser };
  1647.  
  1648.       }
  1649.  
  1650.       /*
  1651.  
  1652.       customElements.get("yt-live-chat-participant-renderer").prototype.notifyPath=function(){  console.log(123);  console.log(new Error().stack)}
  1653.  
  1654.       VM63631:1 Error
  1655.       at customElements.get.notifyPath (<anonymous>:1:122)
  1656.       at e.forwardRendererStamperChanges_ (live_chat_polymer.js:4453:35)
  1657.       at e.rendererStamperApplyChangeRecord_ (live_chat_polymer.js:4451:12)
  1658.       at e.rendererStamperObserver_ (live_chat_polymer.js:4448:149)
  1659.       at Object.pu [as fn] (live_chat_polymer.js:1692:118)
  1660.       at ju (live_chat_polymer.js:1674:217)
  1661.       at a._propertiesChanged (live_chat_polymer.js:1726:122)
  1662.       at b._flushProperties (live_chat_polymer.js:1597:200)
  1663.       at a._invalidateProperties (live_chat_polymer.js:1718:69)
  1664.       at a.notifyPath (live_chat_polymer.js:1741:182)
  1665.  
  1666.       */
  1667.  
  1668.       function convertToIds(participants) {
  1669.         return participants.map(participant => {
  1670.           if (!participant || typeof participant !== 'object') {
  1671.             console.warn('Error(0xFA41): convertToIds', participant);
  1672.             return participant; // just in case
  1673.           }
  1674.           let keys = Object.keys(participant);
  1675.           // liveChatTextMessageRenderer
  1676.           // liveChatParticipantRenderer - livestream channel owner [no authorExternalChannelId]
  1677.           // liveChatPaidMessageRenderer
  1678.           /*
  1679.  
  1680.             'yt-live-chat-participant-renderer' utilizes the following:
  1681.             authorName.simpleText: string
  1682.             authorPhoto.thumbnails: Object{url:string, width:int, height:int} []
  1683.             authorBadges[].liveChatAuthorBadgeRenderer.icon.iconType: string
  1684.             authorBadges[].liveChatAuthorBadgeRenderer.tooltip: string
  1685.             authorBadges[].liveChatAuthorBadgeRenderer.accessibility.accessibilityData: Object{label:string}
  1686.  
  1687.           */
  1688.           if (keys.length !== 1) {
  1689.             console.warn('Error(0xFA42): convertToIds', participant);
  1690.             return participant; // just in case
  1691.           }
  1692.           let key = keys[0];
  1693.           let renderer = (participant[key] || 0);
  1694.           let authorName = (renderer.authorName || 0);
  1695.           let text = `${authorName.simpleText || authorName.text}`
  1696.           let res = participant; // fallback if it is not a vaild entry
  1697.           if (typeof text !== 'string') {
  1698.             console.warn('Error(0xFA53): convertToIds', participant);
  1699.           } else {
  1700.             text = `${renderer.authorExternalChannelId || 'null'}|${text || ''}`;
  1701.             if (text.length > 1) res = text;
  1702.           }
  1703.           return res;
  1704.           // return renderer?`${renderer.id}|${renderer.authorExternalChannelId}`: '';
  1705.           // note: renderer.id will be changed if the user typed something to trigger the update of the participants' record.
  1706.         });
  1707.       }
  1708.  
  1709.       const checkChangeToParticipantRendererContent = CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT ? (p1, p2) => {
  1710.         // just update when content is changed.
  1711.         if (p1.authorName !== p2.authorName) return true;
  1712.         if (p1.authorPhoto !== p2.authorPhoto) return true;
  1713.         if (p1.authorBadges !== p2.authorBadges) return true;
  1714.         return false;
  1715.       } : (p1, p2) => {
  1716.         // keep integrity all the time.
  1717.         return p1 !== p2; // always true
  1718.       }
  1719.  
  1720.       function notifyPath7081(path) { // cnt "yt-live-chat-participant-list-renderer"
  1721.  
  1722.         if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1723.           if (path !== "participantsManager.participants") {
  1724.             return this.__notifyPath5036__.apply(this, arguments);
  1725.           }
  1726.           if (c95dm === r95dm) return;
  1727.         } else {
  1728.           const stack = new Error().stack;
  1729.           if (path !== "participantsManager.participants" || stack.indexOf('.onParticipantsChanged') < 0) {
  1730.             return this.__notifyPath5036__.apply(this, arguments);
  1731.           }
  1732.         }
  1733.  
  1734.         if (uvid > 1e8) uvid = uvid % 100;
  1735.         let tid = ++uvid;
  1736.  
  1737.         const cnt = this; // "yt-live-chat-participant-list-renderer"
  1738.         mutexParticipants.lockWith(lockResolve => {
  1739.  
  1740.           const participants00 = cnt.participantsManager.participants;
  1741.  
  1742.           if (tid !== uvid || typeof (participants00 || 0).splice !== 'function') {
  1743.             lockResolve();
  1744.             return;
  1745.           }
  1746.  
  1747.           let doUpdate = false;
  1748.  
  1749.           if (PARTICIPANT_UPDATE_ONLY_ONLY_IF_MODIFICATION_DETECTED) {
  1750.  
  1751.             if (!participants00.r94dm) {
  1752.               participants00.r94dm = 1;
  1753.               if (++r95dm > 1e9) r95dm = 9;
  1754.               participants00.push = function () {
  1755.                 if (++r95dm > 1e9) r95dm = 9;
  1756.                 return Array.prototype.push.apply(this, arguments);
  1757.               }
  1758.               participants00.pop = function () {
  1759.                 if (++r95dm > 1e9) r95dm = 9;
  1760.                 return Array.prototype.pop.apply(this, arguments);
  1761.               }
  1762.               participants00.shift = function () {
  1763.                 if (++r95dm > 1e9) r95dm = 9;
  1764.                 return Array.prototype.shift.apply(this, arguments);
  1765.               }
  1766.               participants00.unshift = function () {
  1767.                 if (++r95dm > 1e9) r95dm = 9;
  1768.                 return Array.prototype.unshift.apply(this, arguments);
  1769.               }
  1770.               participants00.splice = function () {
  1771.                 if (++r95dm > 1e9) r95dm = 9;
  1772.                 return Array.prototype.splice.apply(this, arguments);
  1773.               }
  1774.               participants00.sort = function () {
  1775.                 if (++r95dm > 1e9) r95dm = 9;
  1776.                 return Array.prototype.sort.apply(this, arguments);
  1777.               }
  1778.               participants00.reverse = function () {
  1779.                 if (++r95dm > 1e9) r95dm = 9;
  1780.                 return Array.prototype.reverse.apply(this, arguments);
  1781.               }
  1782.             }
  1783.  
  1784.             if (c95dm !== r95dm) {
  1785.               c95dm = r95dm;
  1786.               doUpdate = true;
  1787.             }
  1788.  
  1789.           } else {
  1790.             doUpdate = true;
  1791.           }
  1792.  
  1793.           if (!doUpdate) {
  1794.             lockResolve();
  1795.             return;
  1796.           }
  1797.  
  1798.           const participants = participants00.slice(0);
  1799.           const beforeParticipants = beforeParticipantsMap.get(cnt) || [];
  1800.           beforeParticipantsMap.set(cnt, participants);
  1801.  
  1802.           const resPromise = (async () => {
  1803.  
  1804.             if (beforeParticipants.length === 0) {
  1805.               // not error
  1806.               return 0;
  1807.             }
  1808.  
  1809.             let countOfElements = cnt.__getAllParticipantsDOMRenderedLength__()
  1810.  
  1811.             // console.log(participants.length, doms.length) // different if no requestAnimationFrame
  1812.             if (beforeParticipants.length !== countOfElements) {
  1813.               // there is somewrong for the cache. - sometimes happen
  1814.               return 0;
  1815.             }
  1816.  
  1817.             const idsBefore = convertToIds(beforeParticipants);
  1818.             const idsAfter = convertToIds(participants);
  1819.  
  1820.             let { indexSplices, contentUpdates, releaser } = spliceIndicesFunc(beforeParticipants, participants, idsBefore, idsAfter);
  1821.  
  1822.             let res = 1; // default 1 for no update
  1823.  
  1824.             if (indexSplices.length >= 1) {
  1825.  
  1826.  
  1827.               // let p2 =  participants.slice(indexSplices[0].index, indexSplices[0].index+indexSplices[0].addedCount);
  1828.               // let p1 = indexSplices[0].removed;
  1829.               // console.log(indexSplices.length, indexSplices ,p1,p2,  convertToIds(p1),convertToIds(p2))
  1830.  
  1831.               /* folllow
  1832.                   a.notifyPath(c + ".splices", d);
  1833.                   a.notifyPath(c + ".length", b.length);
  1834.               */
  1835.               // stampDomArraySplices_
  1836.  
  1837.  
  1838.               await new Promise(resolve => {
  1839.                 cnt.resolveForDOMRendering781 = resolve;
  1840.  
  1841.                 cnt.__notifyPath5036__("participantsManager.participants.splices", {
  1842.                   indexSplices
  1843.                 });
  1844.                 indexSplices = null;
  1845.                 releaser();
  1846.                 releaser = null;
  1847.                 cnt.__notifyPath5036__("participantsManager.participants.length",
  1848.                   participants.length
  1849.                 );
  1850.  
  1851.               });
  1852.  
  1853.               await Promise.resolve(0); // play safe for the change of 'length'
  1854.               countOfElements = cnt.__getAllParticipantsDOMRenderedLength__();
  1855.  
  1856.               let wrongSize = participants.length !== countOfElements
  1857.               if (wrongSize) {
  1858.                 console.warn("ERROR(0xE2C3): notifyPath7081", beforeParticipants.length, participants.length, doms.length)
  1859.                 return 0;
  1860.               }
  1861.  
  1862.               res = 2 | 4;
  1863.  
  1864.             } else {
  1865.  
  1866.               indexSplices = null;
  1867.               releaser();
  1868.               releaser = null;
  1869.  
  1870.               if (participants.length !== countOfElements) {
  1871.                 // other unhandled cases
  1872.                 return 0;
  1873.               }
  1874.  
  1875.             }
  1876.  
  1877.             // participants.length === countOfElements before contentUpdates
  1878.             if (contentUpdates.length >= 1) {
  1879.               for (const contentUpdate of contentUpdates) {
  1880.                 let isChanged = checkChangeToParticipantRendererContent(beforeParticipants[contentUpdate.indexI], participants[contentUpdate.indexJ]);
  1881.                 if (isChanged) {
  1882.                   cnt.__notifyPath5036__(`participantsManager.participants[${contentUpdate.indexJ}]`);
  1883.                   res |= 4 | 8;
  1884.                 }
  1885.               }
  1886.             }
  1887.             contentUpdates = null;
  1888.  
  1889.             return res;
  1890.  
  1891.  
  1892.           })();
  1893.  
  1894.  
  1895.           resPromise.then(resValue => {
  1896.  
  1897.             const isLogRequired = SHOW_PARTICIPANT_CHANGES_IN_CONSOLE && ((resValue === 0) || ((resValue & 4) === 4));
  1898.             isLogRequired && groupCollapsed("Participant List Change", `tid = ${tid}; res = ${resValue}`);
  1899.             if (resValue === 0) {
  1900.               new Promise(resolve => {
  1901.                 cnt.resolveForDOMRendering781 = resolve;
  1902.                 isLogRequired && console.log("Full Refresh begins");
  1903.                 cnt.__notifyPath5036__("participantsManager.participants"); // full refresh
  1904.               }).then(() => {
  1905.                 isLogRequired && console.log("Full Refresh ends");
  1906.                 console.groupEnd();
  1907.               }).then(lockResolve);
  1908.               return;
  1909.             }
  1910.  
  1911.             const delayLockResolve = (resValue & 4) === 4;
  1912.  
  1913.             if (delayLockResolve) {
  1914.               isLogRequired && console.log(`Number of participants (before): ${beforeParticipants.length}`);
  1915.               isLogRequired && console.log(`Number of participants (after): ${participants.length}`);
  1916.               isLogRequired && console.log(`Total number of rendered participants: ${cnt.__getAllParticipantsDOMRenderedLength__()}`);
  1917.               isLogRequired && console.log(`Participant Renderer Content Updated: ${(resValue & 8) === 8}`);
  1918.               isLogRequired && console.groupEnd();
  1919.               // requestAnimationFrame is required to avoid particiant update during DOM changing (stampDomArraySplices_)
  1920.               // mutex lock with requestAnimationFrame can also disable participants update in background
  1921.               requestAnimationFrame(lockResolve);
  1922.             } else {
  1923.               lockResolve();
  1924.             }
  1925.  
  1926.           });
  1927.  
  1928.         });
  1929.  
  1930.       }
  1931.  
  1932.       return { notifyPath7081 };
  1933.  
  1934.     })();
  1935.  
  1936.  
  1937.     const onRegistryReadyForDataManipulation = () => {
  1938.  
  1939.       function dummy5035(a, b, c) { }
  1940.       function dummy411(a, b, c) { }
  1941.  
  1942.       customElements.whenDefined("yt-live-chat-participant-list-renderer").then(() => {
  1943.  
  1944.         if (!DO_PARTICIPANT_LIST_HACKS) return;
  1945.  
  1946.         const tag = "yt-live-chat-participant-list-renderer";
  1947.         const cProto = getProto(document.createElement(tag));
  1948.         if (!cProto || typeof cProto.attached !== 'function') {
  1949.           // for _registered, proto.attached shall exist when the element is defined.
  1950.           // for controller extraction, attached shall exist when instance creates.
  1951.           console.warn(`proto.attached for ${tag} is unavailable.`);
  1952.           return;
  1953.         }
  1954.  
  1955.  
  1956.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-participant-list-renderer hacks");
  1957.  
  1958.         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'];
  1959.         const fgs = {};
  1960.         for (const key of fgsArr) fgs[key] = undefined;
  1961.  
  1962.         try {
  1963.           const EXPERIMENT_FLAGS = ytcfg.data_.EXPERIMENT_FLAGS;
  1964.           for (const key of fgsArr) fgs[key] = EXPERIMENT_FLAGS[key];
  1965.         } catch (e) { }
  1966.         console.log(`EXPERIMENT_FLAGS: ${JSON.stringify(fgs, null, 2)}`);
  1967.  
  1968.         const canDoReplacement = (() => {
  1969.           if (typeof cProto.__notifyPath5035__ === 'function' && cProto.__notifyPath5035__.name !== 'dummy5035') {
  1970.             console.warn('YouTube Live Chat Tamer is running.');
  1971.             return;
  1972.           }
  1973.  
  1974.           if (typeof cProto.__attached411__ === 'function' && cProto.__attached411__.name !== 'dummy411') {
  1975.             console.warn('YouTube Live Chat Tamer is running.');
  1976.             return;
  1977.           }
  1978.  
  1979.           cProto.__notifyPath5035__ = dummy5035 // just to against Live Chat Tamer
  1980.           cProto.__attached411__ = dummy411 // just to against Live Chat Tamer
  1981.  
  1982.           if (typeof cProto.flushRenderStamperComponentBindings_ !== 'function' || cProto.flushRenderStamperComponentBindings_.length !== 0) {
  1983.             console.warn("ERROR(0xE355): cProto.flushRenderStamperComponentBindings_ not found");
  1984.             return;
  1985.           }
  1986.  
  1987.           if (typeof cProto.flushRenderStamperComponentBindings66_ === 'function') {
  1988.             console.warn("ERROR(0xE356): cProto.flushRenderStamperComponentBindings66_");
  1989.             return;
  1990.           }
  1991.  
  1992.           if (typeof cProto.__getAllParticipantsDOMRenderedLength__ === 'function') {
  1993.             console.warn("ERROR(0xE357): cProto.__getAllParticipantsDOMRenderedLength__");
  1994.             return;
  1995.           }
  1996.           return true;
  1997.         })();
  1998.  
  1999.         console.log(`Data Manipulation Boost = ${canDoReplacement}`);
  2000.  
  2001.         assertor(() => fnIntegrity(cProto.attached, '0.32.22')) // just warning
  2002.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2003.           const fiRSCB = fnIntegrity(cProto.flushRenderStamperComponentBindings_);
  2004.           const s = fiRSCB.split('.');
  2005.           if (s[0] === '0' && +s[1] > 381 && +s[1] < 391 && +s[2] > 228 && +s[2] < 238) {
  2006.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - OK`);
  2007.           } else {
  2008.             console.log(`flushRenderStamperComponentBindings_ ### ${fiRSCB} ### - Failed`);
  2009.           }
  2010.         } else {
  2011.           console.log("flushRenderStamperComponentBindings_ - not found");
  2012.         }
  2013.         // assertor(() => fnIntegrity(cProto.flushRenderStamperComponentBindings_, '0.386.233')) // just warning
  2014.  
  2015.         if (typeof cProto.flushRenderStamperComponentBindings_ === 'function') {
  2016.           cProto.flushRenderStamperComponentBindings66_ = cProto.flushRenderStamperComponentBindings_;
  2017.           cProto.flushRenderStamperComponentBindings_ = function () {
  2018.             // console.log('flushRenderStamperComponentBindings_')
  2019.             this.flushRenderStamperComponentBindings66_();
  2020.             if (this.resolveForDOMRendering781) {
  2021.               this.resolveForDOMRendering781();
  2022.               this.resolveForDOMRendering781 = null;
  2023.             }
  2024.           };
  2025.         }
  2026.  
  2027.         cProto.__getAllParticipantsDOMRenderedLength__ = function () {
  2028.           const container = ((this || 0).$ || 0).participants;
  2029.           if (!container) return 0;
  2030.           return HTMLElement.prototype.querySelectorAll.call(container, 'yt-live-chat-participant-renderer').length;
  2031.         }
  2032.  
  2033.         const onPageElements = [...document.querySelectorAll('yt-live-chat-participant-list-renderer:not(.n9fJ3)')];
  2034.  
  2035.         cProto.__attached412__ = cProto.attached;
  2036.         const fpPList = function (hostElement) {
  2037.           const cnt = hostElement.inst || hostElement;
  2038.           if (beforeParticipantsMap.has(cnt)) return;
  2039.           hostElement.classList.add('n9fJ3');
  2040.  
  2041.           assertor(() => (cnt.__dataEnabled === true && cnt.__dataReady === true));
  2042.           if (typeof cnt.notifyPath !== 'function' || typeof cnt.__notifyPath5036__ !== 'undefined') {
  2043.             console.warn("ERROR(0xE318): yt-live-chat-participant-list-renderer")
  2044.             return;
  2045.           }
  2046.  
  2047.           groupCollapsed("Participant List attached", "");
  2048.           // cnt.$.participants.appendChild = cnt.$.participants.__shady_native_appendChild =  function(){
  2049.           //   console.log(123, 'appendChild');
  2050.           //   return HTMLElement.prototype.appendChild.apply(this, arguments)
  2051.           // }
  2052.  
  2053.           // cnt.$.participants.insertBefore =cnt.$.participants.__shady_native_insertBefore =  function(){
  2054.           //   console.log(123, 'insertBefore');
  2055.           //   return HTMLElement.prototype.insertBefore.apply(this, arguments)
  2056.           // }
  2057.  
  2058.           cnt.__notifyPath5036__ = cnt.notifyPath
  2059.           const participants = ((cnt.participantsManager || 0).participants || 0);
  2060.           assertor(() => (participants.length > -1 && typeof participants.slice === 'function'));
  2061.           console.log(`initial number of participants: ${participants.length}`);
  2062.           const newParticipants = (participants.length >= 1 && typeof participants.slice === 'function') ? participants.slice(0) : [];
  2063.           beforeParticipantsMap.set(cnt, newParticipants);
  2064.           cnt.notifyPath = notifyPath7081;
  2065.           console.log(`CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT = ${CHECK_CHANGE_TO_PARTICIPANT_RENDERER_CONTENT}`);
  2066.           console.groupEnd();
  2067.         }
  2068.         cProto.attached = function () {
  2069.           fpPList(this.hostElement || this);
  2070.           this.__attached412__.apply(this, arguments);
  2071.         };
  2072.  
  2073.  
  2074.         if (ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST) {
  2075.  
  2076.           /** @type {boolean | (()=>boolean)} */
  2077.           let toUseMaintainStableList = USE_MAINTAIN_STABLE_LIST_ONLY_WHEN_KS_FLAG_IS_SET ? (() => ytcfg.data_.EXPERIMENT_FLAGS.kevlar_should_maintain_stable_list === true) : true;
  2078.           if (typeof cProto.stampDomArray_ === 'function' && cProto.stampDomArray_.length === 6 && !cProto.stampDomArray_.nIegT && !cProto.stampDomArray66_) {
  2079.  
  2080.             let lastMessageDate = 0;
  2081.             cProto.stampDomArray66_ = cProto.stampDomArray_;
  2082.  
  2083.             cProto.stampDomArray_ = function (...args) {
  2084.               if (args[0] && args[0].length > 0 && args[1] === "participants" && args[2] && args[3] === true && !args[5]) {
  2085.                 if (typeof toUseMaintainStableList === 'function') {
  2086.                   toUseMaintainStableList = toUseMaintainStableList();
  2087.                 }
  2088.                 args[5] = toUseMaintainStableList;
  2089.                 let currentDate = Date.now();
  2090.                 if (currentDate - lastMessageDate > 440) {
  2091.                   lastMessageDate = currentDate;
  2092.                   console.log('maintain_stable_list for participants list', toUseMaintainStableList);
  2093.                 }
  2094.               }
  2095.               return this.stampDomArray66_.apply(this, args);
  2096.             }
  2097.  
  2098.             cProto.stampDomArray_.nIegT = 1;
  2099.  
  2100.           }
  2101.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - YES`);
  2102.         } else {
  2103.           console.log(`ENABLE_FLAGS_MAINTAIN_STABLE_LIST_FOR_PARTICIPANTS_LIST - NO`);
  2104.         }
  2105.  
  2106.         console.groupEnd();
  2107.  
  2108.         if (onPageElements.length >= 1) {
  2109.           for (const s of onPageElements) {
  2110.             if ((s.inst || s).isAttached === true) {
  2111.               fpPList(s);
  2112.             }
  2113.           }
  2114.         }
  2115.  
  2116.       }).catch(console.warn);
  2117.  
  2118.     };
  2119.  
  2120.     if (DO_PARTICIPANT_LIST_HACKS) {
  2121.       promiseForCustomYtElementsReady.then(onRegistryReadyForDataManipulation);
  2122.     }
  2123.  
  2124.  
  2125.  
  2126.     const rafHub = (ENABLE_RAF_HACK_TICKERS || ENABLE_RAF_HACK_DOCKED_MESSAGE || ENABLE_RAF_HACK_INPUT_RENDERER || ENABLE_RAF_HACK_EMOJI_PICKER) ? new RAFHub() : null;
  2127.  
  2128.  
  2129.  
  2130.  
  2131.     const bnForDelayChatOccurrence = () => {
  2132.  
  2133.       document.addEventListener('animationstart', (evt) => {
  2134.  
  2135.         if (evt.animationName === 'dontRenderAnimation') {
  2136.           evt.target.classList.remove('dont-render');
  2137.           if (scrollChatFn) scrollChatFn();
  2138.         }
  2139.  
  2140.       }, true);
  2141.  
  2142.       const f = (elm) => {
  2143.         if (elm && elm.nodeType === 1) {
  2144.           if (!skipDontRender && allowDontRender === true) {
  2145.             // innerTextFixFn();
  2146.             elm.classList.add('dont-render');
  2147.           }
  2148.         }
  2149.       }
  2150.  
  2151.       Node.prototype.__appendChild931__ = function (a) {
  2152.         a = dr(a);
  2153.         if (this.id === 'items' && this.classList.contains('yt-live-chat-item-list-renderer')) {
  2154.           if (a && a.nodeType === 1) f(a);
  2155.           else if (a instanceof DocumentFragment) {
  2156.             for (let n = a.firstChild; n; n = n.nextSibling) {
  2157.               f(n);
  2158.             }
  2159.           }
  2160.         }
  2161.       }
  2162.  
  2163.       Node.prototype.__appendChild932__ = function () {
  2164.         this.__appendChild931__.apply(this, arguments);
  2165.         return Node.prototype.appendChild.apply(this, arguments);
  2166.       }
  2167.  
  2168.  
  2169.     };
  2170.  
  2171.     const watchUserCSS = () => {
  2172.  
  2173.       // if (!CSS.supports('contain-intrinsic-size', 'auto var(--wsr94)')) return;
  2174.  
  2175.       const getElemFromWR = (nr) => {
  2176.         const n = kRef(nr);
  2177.         if (n && n.isConnected) return n;
  2178.         return null;
  2179.       }
  2180.  
  2181.       const clearContentVisibilitySizing = () => {
  2182.         Promise.resolve().then(() => {
  2183.  
  2184.           const e = document.querySelector('#show-more[disabled]');
  2185.           let btnShowMoreWR = e ? mWeakRef(e) : null;
  2186.  
  2187.           let lastVisibleItemWR = null;
  2188.           for (const elm of document.querySelectorAll('[wSr93]')) {
  2189.             if (elm.getAttribute('wSr93') === 'visible') lastVisibleItemWR = mWeakRef(elm);
  2190.             elm.setAttribute('wSr93', '');
  2191.             // custom CSS property --wsr94 not working when attribute wSr93 removed
  2192.           }
  2193.           requestAnimationFrame(() => {
  2194.             const btnShowMore = getElemFromWR(btnShowMoreWR); btnShowMoreWR = null;
  2195.             if (btnShowMore) btnShowMore.click();
  2196.             else {
  2197.               // would not work if switch it frequently
  2198.               const lastVisibleItem = getElemFromWR(lastVisibleItemWR); lastVisibleItemWR = null;
  2199.               if (lastVisibleItem) {
  2200.  
  2201.                 Promise.resolve()
  2202.                   .then(() => lastVisibleItem.scrollIntoView())
  2203.                   .then(() => lastVisibleItem.scrollIntoView(false))
  2204.                   .then(() => lastVisibleItem.scrollIntoView({ behavior: "instant", block: "end", inline: "nearest" }))
  2205.                   .catch(e => { }) // break the chain when method not callable
  2206.  
  2207.               }
  2208.             }
  2209.           });
  2210.  
  2211.         });
  2212.  
  2213.       }
  2214.  
  2215.       const mutObserver = new MutationObserver((mutations) => {
  2216.         for (const mutation of mutations) {
  2217.           if ((mutation.addedNodes || 0).length >= 1) {
  2218.             for (const addedNode of mutation.addedNodes) {
  2219.               if (addedNode.nodeName === 'STYLE') {
  2220.                 clearContentVisibilitySizing();
  2221.                 return;
  2222.               }
  2223.             }
  2224.           }
  2225.           if ((mutation.removedNodes || 0).length >= 1) {
  2226.             for (const removedNode of mutation.removedNodes) {
  2227.               if (removedNode.nodeName === 'STYLE') {
  2228.                 clearContentVisibilitySizing();
  2229.                 return;
  2230.               }
  2231.             }
  2232.           }
  2233.         }
  2234.       });
  2235.  
  2236.       mutObserver.observe(document.documentElement, {
  2237.         childList: true,
  2238.         subtree: false
  2239.       });
  2240.       mutObserver.observe(document.head, {
  2241.         childList: true,
  2242.         subtree: false
  2243.       });
  2244.       mutObserver.observe(document.body, {
  2245.         childList: true,
  2246.         subtree: false
  2247.       });
  2248.  
  2249.     }
  2250.  
  2251.  
  2252.     class WillChangeController {
  2253.       constructor(itemScroller, willChangeValue) {
  2254.         this.element = itemScroller;
  2255.         this.counter = 0;
  2256.         this.active = false;
  2257.         this.willChangeValue = willChangeValue;
  2258.       }
  2259.  
  2260.       beforeOper() {
  2261.         if (!this.active) {
  2262.           this.active = true;
  2263.           this.element.style.willChange = this.willChangeValue;
  2264.         }
  2265.         this.counter++;
  2266.       }
  2267.  
  2268.       afterOper() {
  2269.         const c = this.counter;
  2270.         requestAnimationFrame(() => {
  2271.           if (c === this.counter) {
  2272.             this.active = false;
  2273.             this.element.style.willChange = '';
  2274.           }
  2275.         });
  2276.       }
  2277.  
  2278.       release() {
  2279.         const element = this.element;
  2280.         this.element = null;
  2281.         this.counter = 1e16;
  2282.         this.active = false;
  2283.         try {
  2284.           element.style.willChange = '';
  2285.         } catch (e) { }
  2286.       }
  2287.  
  2288.     }
  2289.  
  2290.  
  2291.     const skzData = (skz) => skz.data = {
  2292.       "message": {
  2293.         "runs": [
  2294.           {
  2295.             "text": "em2o"
  2296.           },
  2297.           {
  2298.             "emoji": {
  2299.               "emojiId": "cm35z",
  2300.               "shortcuts": [
  2301.                 ":_s:",
  2302.                 ":s:"
  2303.               ],
  2304.               "searchTerms": [
  2305.                 "_s",
  2306.                 "s"
  2307.               ],
  2308.               "image": {
  2309.                 "thumbnails": [
  2310.                   {
  2311.                     "url": dummyImgURL,
  2312.                     "width": 48,
  2313.                     "height": 48
  2314.                   }
  2315.                 ],
  2316.                 "accessibility": {
  2317.                   "accessibilityData": {
  2318.                     "label": "s"
  2319.                   }
  2320.                 }
  2321.               },
  2322.               "isCustomEmoji": true
  2323.             }
  2324.           },
  2325.           {
  2326.             "text": "ji"
  2327.           }
  2328.         ]
  2329.       },
  2330.       "authorName": {
  2331.         "simpleText": "N"
  2332.       },
  2333.       "authorPhoto": {
  2334.         "thumbnails": [
  2335.           {
  2336.             "url": dummyImgURL,
  2337.             "width": 64,
  2338.             "height": 64
  2339.           }
  2340.         ]
  2341.       },
  2342.       "contextMenuEndpoint": {
  2343.         "commandMetadata": {
  2344.           "webCommandMetadata": {
  2345.             "ignoreNavigation": true
  2346.           }
  2347.         },
  2348.         "liveChatItemContextMenuEndpoint": {
  2349.           "params": "123=="
  2350.         }
  2351.       },
  2352.       "id": "sk35z",
  2353.       "timestampUsec": "1232302352350000",
  2354.       "authorBadges": [
  2355.         {
  2356.           "liveChatAuthorBadgeRenderer": {
  2357.             "customThumbnail": {
  2358.               "thumbnails": [
  2359.                 {
  2360.                   "url": dummyImgURL,
  2361.                   "width": 16,
  2362.                   "height": 16
  2363.                 },
  2364.                 {
  2365.                   "url": dummyImgURL,
  2366.                   "width": 32,
  2367.                   "height": 32
  2368.                 }
  2369.               ]
  2370.             },
  2371.             "tooltip": "T",
  2372.             "accessibility": {
  2373.               "accessibilityData": {
  2374.                 "label": "E"
  2375.               }
  2376.             }
  2377.           }
  2378.         }
  2379.       ],
  2380.       "authorExternalChannelId": "A",
  2381.       "contextMenuAccessibility": {
  2382.         "accessibilityData": {
  2383.           "label": "E"
  2384.         }
  2385.       },
  2386.       "timestampText": {
  2387.         "simpleText": "0:43"
  2388.       }
  2389.     };
  2390.  
  2391.  
  2392.  
  2393.     const { lcRendererElm, visObserver } = (() => {
  2394.  
  2395.  
  2396.  
  2397.       let lcRendererWR = null;
  2398.  
  2399.       const lcRendererElm = () => {
  2400.         let lcRenderer = kRef(lcRendererWR);
  2401.         if (!lcRenderer || !lcRenderer.isConnected) {
  2402.           lcRenderer = document.querySelector('yt-live-chat-item-list-renderer.yt-live-chat-renderer');
  2403.           lcRendererWR = lcRenderer ? mWeakRef(lcRenderer) : null;
  2404.         }
  2405.         return lcRenderer;
  2406.       };
  2407.  
  2408.  
  2409.       let hasFirstShowMore = false;
  2410.  
  2411.       const visObserverFn = (entry) => {
  2412.  
  2413.         const target = entry.target;
  2414.         if (!target) return;
  2415.         // if(target.classList.contains('dont-render')) return;
  2416.         let isVisible = entry.isIntersecting === true && entry.intersectionRatio > 0.5;
  2417.         // const h = entry.boundingClientRect.height;
  2418.         /*
  2419.         if (h < 16) { // wrong: 8 (padding/margin); standard: 32; test: 16 or 20
  2420.             // e.g. under fullscreen. the element created but not rendered.
  2421.             target.setAttribute('wSr93', '');
  2422.             return;
  2423.         }
  2424.         */
  2425.         if (isVisible) {
  2426.           // target.style.setProperty('--wsr94', h + 'px');
  2427.           target.setAttribute('wSr93', 'visible');
  2428.           if (nNextElem(target) === null) {
  2429.  
  2430.             // firstVisibleItemDetected = true;
  2431.             /*
  2432.               if (dateNow() - lastScroll < 80) {
  2433.                   lastLShow = 0;
  2434.                   lastScroll = 0;
  2435.                   Promise.resolve().then(clickShowMore);
  2436.               } else {
  2437.                   lastLShow = dateNow();
  2438.               }
  2439.               */
  2440.             // lastLShow = dateNow();
  2441.           } else if (!hasFirstShowMore) { // should more than one item being visible
  2442.             // implement inside visObserver to ensure there is sufficient delay
  2443.             hasFirstShowMore = true;
  2444.             requestAnimationFrame(() => {
  2445.               // foreground page
  2446.               // page visibly ready -> load the latest comments at initial loading
  2447.               const lcRenderer = lcRendererElm();
  2448.               if (lcRenderer) {
  2449.                 (lcRenderer.inst || lcRenderer).scrollToBottom_();
  2450.               }
  2451.             });
  2452.           }
  2453.         }
  2454.         else if (target.getAttribute('wSr93') === 'visible') { // ignore target.getAttribute('wSr93') === '' to avoid wrong sizing
  2455.  
  2456.           // target.style.setProperty('--wsr94', h + 'px');
  2457.           target.setAttribute('wSr93', 'hidden');
  2458.         } // note: might consider 0 < entry.intersectionRatio < 0.5 and target.getAttribute('wSr93') === '' <new last item>
  2459.  
  2460.       }
  2461.  
  2462.  
  2463.  
  2464.       const visObserver = new IntersectionObserver((entries) => {
  2465.  
  2466.         for (const entry of entries) {
  2467.  
  2468.           Promise.resolve(entry).then(visObserverFn);
  2469.  
  2470.         }
  2471.  
  2472.       }, {
  2473.         // root: HTMLElement.prototype.closest.call(m2, '#item-scroller.yt-live-chat-item-list-renderer'), // nullable
  2474.         rootMargin: "0px",
  2475.         threshold: [0.05, 0.95],
  2476.       });
  2477.  
  2478.  
  2479.       return { lcRendererElm, visObserver }
  2480.  
  2481.  
  2482.     })();
  2483.  
  2484.     const { setupMutObserver } = (() => {
  2485.  
  2486.       const mutFn = (items) => {
  2487.         for (let node = nLastElem(items); node !== null; node = nPrevElem(node)) {
  2488.           if (node.hasAttribute('wSr93')) break;
  2489.           node.setAttribute('wSr93', '');
  2490.           visObserver.observe(node);
  2491.         }
  2492.       }
  2493.  
  2494.       const mutObserver = new MutationObserver((mutations) => {
  2495.         const items = (mutations[0] || 0).target;
  2496.         if (!items) return;
  2497.         if (sk35zResolveFn) {
  2498.           sk35zResolveFn();
  2499.           sk35zResolveFn = null;
  2500.         }
  2501.         mutFn(items);
  2502.       });
  2503.  
  2504.       const setupMutObserver = (m2) => {
  2505.         scrollChatFn = null;
  2506.         mutObserver.disconnect();
  2507.         mutObserver.takeRecords();
  2508.         if (m2) {
  2509.           ENABLE_DELAYED_CHAT_OCCURRENCE && bnForDelayChatOccurrence();
  2510.           if (typeof m2.__appendChild932__ === 'function') {
  2511.             if (typeof m2.appendChild === 'function') m2.appendChild = m2.__appendChild932__;
  2512.             if (typeof m2.__shady_native_appendChild === 'function') m2.__shady_native_appendChild = m2.__appendChild932__;
  2513.           }
  2514.           mutObserver.observe(m2, {
  2515.             childList: true,
  2516.             subtree: false
  2517.           });
  2518.           mutFn(m2);
  2519.  
  2520.           const isFirstList = firstList;
  2521.           firstList = false;
  2522.  
  2523.           if (ENABLE_OVERFLOW_ANCHOR) {
  2524.  
  2525.             let items = m2;
  2526.             let addedAnchor = false;
  2527.             if (items) {
  2528.               if (items.nextElementSibling === null) {
  2529.                 items.classList.add('no-anchor');
  2530.                 addedAnchor = true;
  2531.                 items.parentNode.appendChild(dr(document.createElement('item-anchor')));
  2532.               }
  2533.             }
  2534.  
  2535.  
  2536.  
  2537.             if (addedAnchor) {
  2538.               nodeParent(m2).classList.add('no-anchor'); // required
  2539.             }
  2540.  
  2541.           }
  2542.  
  2543.           // let div = document.createElement('div');
  2544.           // div.id = 'qwcc';
  2545.           // HTMLElement.prototype.appendChild.call(document.querySelector('yt-live-chat-item-list-renderer'), div )
  2546.           // bufferRegion =div;
  2547.  
  2548.           // buffObserver.takeRecords();
  2549.           // buffObserver.disconnect();
  2550.           // buffObserver.observe(div,  {
  2551.           //     childList: true,
  2552.           //     subtree: false
  2553.           // })
  2554.  
  2555.           if (ENABLE_DELAYED_CHAT_OCCURRENCE && isFirstList) {
  2556.  
  2557.             promiseForCustomYtElementsReady.then(() => {
  2558.  
  2559.               customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  2560.  
  2561.  
  2562.  
  2563.  
  2564.                 setTimeout(() => {
  2565.  
  2566.                   /** @type {HTMLTemplateElement} */
  2567.                   let skz = document.createElement('yt-live-chat-text-message-renderer');
  2568.  
  2569.                   let cz1 = null;
  2570.  
  2571.                   if (skz && 'data' in skz && 'attached' in skz) {
  2572.  
  2573.                     const deferredZy1 = new Promise(resolve => {
  2574.  
  2575.                       skz.attached = function () {
  2576.                         cz1 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2577.                         resolve(skz.textContent);
  2578.                       }
  2579.                       skz.detached = function () {
  2580.  
  2581.                       }
  2582.  
  2583.                     });
  2584.                     skz.id = 'sk35z';
  2585.                     skzData(skz);
  2586.  
  2587.  
  2588.                     sk35zResolveFn = null;
  2589.                     const deferredMutation = new Promise(resolve => {
  2590.                       sk35zResolveFn = resolve;
  2591.                       HTMLElement.prototype.appendChild.call(m2, skz);
  2592.                     });
  2593.  
  2594.                     Promise.all([deferredZy1, deferredMutation]).then(async (res) => {
  2595.                       const [zy1, _] = res;
  2596.                       function fn() {
  2597.                         const zy2 = skz.textContent;
  2598.                         const cz2 = HTMLElement.prototype.querySelector.call(skz, '#message img') !== null;
  2599.                         if (typeof zy1 === 'string' && typeof zy2 === 'string') {
  2600.                           allowDontRender = zy1 === zy2 && cz1 === cz2; // '0:43N​em2oji'
  2601.                         }
  2602.                         if (allowDontRender === false) {
  2603.  
  2604.                           console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2605.                             "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2606.                             "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2607.                           );
  2608.  
  2609.                           console.warn(`%cWarning:\n\tYou might have added a userscript or extension that stops YouTube Super Fast Chat's quick loading.\n\tTo figure out which one affects the script, turn them off one by one and let the author know.`, 'color: #bada55');
  2610.  
  2611.                           console.groupEnd();
  2612.                         } else if (allowDontRender === true) {
  2613.                           return true;
  2614.                         }
  2615.                       }
  2616.                       await new Promise(r => setTimeout(r, 1));
  2617.                       if (fn()) {
  2618.                         await new Promise(r => requestAnimationFrame(r));
  2619.                         if (fn()) {
  2620.                           skz.remove();
  2621.                           skz.textContent = '';
  2622.                           console.log('%cALLOW_DELAYED_CHAT_OCCURRENCE', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2623.                         }
  2624.                       }
  2625.                     });
  2626.  
  2627.                   }
  2628.  
  2629.                 }, 1);
  2630.  
  2631.               }).catch(console.warn);
  2632.  
  2633.             })
  2634.  
  2635.           }
  2636.  
  2637.  
  2638.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  2639.  
  2640.             (() => {
  2641.  
  2642.               const tag = 'yt-iframed-player-events-relay'
  2643.               const dummy = document.createElement(tag);
  2644.  
  2645.               const cProto = getProto(dummy);
  2646.               if (!cProto || !cProto.handlePostMessage_) {
  2647.                 console.warn(`proto.handlePostMessage_ for ${tag} is unavailable.`);
  2648.                 return;
  2649.               }
  2650.  
  2651.               if (typeof cProto.handlePostMessage_ === 'function' && !cProto.handlePostMessage66_) {
  2652.  
  2653.                 cProto.handlePostMessage66_ = cProto.handlePostMessage_;
  2654.  
  2655.                 cProto.handlePostMessage_ = function (a) {
  2656.  
  2657.                   const da = (a || 0).data || 0;
  2658.                   if (typeof da === 'object') {
  2659.  
  2660.                     // console.log('handlePostMessage_', da)
  2661.                     const qc = da['yt-player-state-change'];
  2662.                     if (qc === 3) { // pause
  2663.                       pairForPauseResume++;
  2664.                       pairForPauseResumeM++;
  2665.                     } else if (qc === 1) { // pause
  2666.                       pairForPauseResume++;
  2667.                       pairForPauseResumeM++;
  2668.                     } else if (qc === 2) {
  2669.                       pairForPauseResume++;
  2670.                       pairForPauseResumeM++;
  2671.                     }
  2672.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  2673.                     if (pairForPauseResumeM > 1e9) pairForPauseResumeM = pairForPauseResumeM % 1e4;
  2674.                     return this.handlePostMessage66_(a);
  2675.  
  2676.                   }
  2677.  
  2678.  
  2679.                 }
  2680.  
  2681.               }
  2682.  
  2683.  
  2684.             })();
  2685.  
  2686.           }
  2687.  
  2688.           if (isFirstList && DO_CHECK_TICKER_BACKGROUND_OVERRIDED) {
  2689.             setTimeout(() => {
  2690.               if (!hasTimerModified) return;
  2691.               const tickerRenderer = document.querySelector('#ticker yt-live-chat-ticker-renderer.style-scope.yt-live-chat-renderer');
  2692.               if (!tickerRenderer) return;
  2693.  
  2694.               const items = (tickerRenderer.$ || 0).items || 0;
  2695.               if (!items) return;
  2696.               const template = document.createElement('template');
  2697.               template.innerHTML = `<yt-live-chat-ticker-dummy777-item-renderer class="style-scope yt-live-chat-ticker-renderer" whole-message-clickable=""
  2698.                 modern="" aria-label="¥1,000" role="button" tabindex="0" id="Chw777" style="width: 94px; overflow: hidden;"
  2699.                 dimmed="" [dummy777]>
  2700.                 <div id="container" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer"
  2701.                   style="--background:linear-gradient(90deg, rgba(1,2,3,1),rgba(1,2,3,1) 7%,rgba(4,0,0,1) 7%,rgba(4,0,0,1));">
  2702.                   <div id="content" class="style-scope yt-live-chat-ticker-dummy777-item-renderer" style="color: rgb(255, 255, 255);">
  2703.                     <yt-img-shadow777 id="author-photo" height="24" width="24"
  2704.                       class="style-scope yt-live-chat-ticker-dummy777-item-renderer no-transition"
  2705.                       style="background-color: transparent;" loaded=""><img id="img"
  2706.                         draggable="false" class="style-scope yt-img-shadow" alt="I" height="24" width="24"
  2707.                         src="${dummyImgURL}"></yt-img-shadow777>
  2708.  
  2709.                     <span id="text" dir="ltr" class="style-scope yt-live-chat-ticker-dummy777-item-renderer">¥1,000</span>
  2710.                   </div>
  2711.                 </div>
  2712.               </yt-live-chat-ticker-dummy777-item-renderer>`;
  2713.               const dummy777 = template.content.firstElementChild;
  2714.               items.appendChild(dummy777);
  2715.               Promise.resolve(dummy777).then((dummy777) => {
  2716.                 let container = HTMLElement.prototype.querySelector.call(dummy777, '#container') || 0;
  2717.                 if (container.isConnected === true) {
  2718.  
  2719.                   const evaluated = `${window.getComputedStyle(container).background}`;
  2720.  
  2721.                   container = null;
  2722.                   dummy777.remove();
  2723.                   dummy777.textContent = '';
  2724.                   dummy777 = null;
  2725.  
  2726.                   if (evaluated.indexOf('0.') < 4) {
  2727.  
  2728.                     // not fulfilling
  2729.                     // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  2730.  
  2731.                     console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  2732.                       "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  2733.                       "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  2734.                     );
  2735.                     console.warn(`%cWarning:\n\tYou might have added a userscript or extension that also modifies the ticker background.\n\tYouTube Super Fast Chat is taking over.`, 'color: #bada55');
  2736.                     console.groupEnd();
  2737.  
  2738.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND (Overriding other scripting)', 'background-color: #7eb32b; color: #102624; padding: 2px 4px');
  2739.  
  2740.                   } else {
  2741.  
  2742.                     console.log('%cALLOW_ADVANCED_ANIMATED_TICKER_BACKGROUND', 'background-color: #16c450; color: #102624; padding: 2px 4px');
  2743.                   }
  2744.                 }
  2745.               });
  2746.  
  2747.             }, 800);
  2748.           }
  2749.  
  2750.         }
  2751.       }
  2752.  
  2753.       return { setupMutObserver };
  2754.  
  2755.  
  2756.  
  2757.     })();
  2758.  
  2759.     const setupEvents = () => {
  2760.  
  2761.  
  2762.       let scrollCount = 0;
  2763.  
  2764.       const passiveCapture = typeof IntersectionObserver === 'function' ? { capture: true, passive: true } : true;
  2765.  
  2766.  
  2767.       const delayFlushActiveItemsAfterUserActionK_ = () => {
  2768.  
  2769.         const lcRenderer = lcRendererElm();
  2770.         if (lcRenderer) {
  2771.           const cnt = (lcRenderer.inst || lcRenderer);
  2772.           if (!cnt.hasUserJustInteracted11_) return;
  2773.           if (cnt.atBottom && cnt.allowScroll && cnt.activeItems_.length >= 1 && cnt.hasUserJustInteracted11_()) {
  2774.             cnt.delayFlushActiveItemsAfterUserAction11_ && cnt.delayFlushActiveItemsAfterUserAction11_();
  2775.           }
  2776.         }
  2777.  
  2778.       }
  2779.  
  2780.       document.addEventListener('scroll', (evt) => {
  2781.         if (!evt || !evt.isTrusted) return;
  2782.         // lastScroll = dateNow();
  2783.         if (++scrollCount > 1e9) scrollCount = 9;
  2784.       }, passiveCapture); // support contain => support passive
  2785.  
  2786.       let lastScrollCount = -1;
  2787.       document.addEventListener('wheel', (evt) => {
  2788.         if (!evt || !evt.isTrusted) return;
  2789.         if (lastScrollCount === scrollCount) return;
  2790.         lastScrollCount = scrollCount;
  2791.         lastWheel = dateNow();
  2792.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2793.       }, passiveCapture); // support contain => support passive
  2794.  
  2795.       document.addEventListener('mousedown', (evt) => {
  2796.         if (!evt || !evt.isTrusted) return;
  2797.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2798.         lastMouseDown = dateNow();
  2799.         currentMouseDown = true;
  2800.         lastUserInteraction = lastMouseDown;
  2801.       }, passiveCapture);
  2802.  
  2803.       document.addEventListener('pointerdown', (evt) => {
  2804.         if (!evt || !evt.isTrusted) return;
  2805.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2806.         lastMouseDown = dateNow();
  2807.         currentMouseDown = true;
  2808.         lastUserInteraction = lastMouseDown;
  2809.       }, passiveCapture);
  2810.  
  2811.       document.addEventListener('click', (evt) => {
  2812.         if (!evt || !evt.isTrusted) return;
  2813.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2814.         lastMouseDown = lastMouseUp = dateNow();
  2815.         currentMouseDown = false;
  2816.         lastUserInteraction = lastMouseDown;
  2817.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2818.       }, passiveCapture);
  2819.  
  2820.       document.addEventListener('tap', (evt) => {
  2821.         if (!evt || !evt.isTrusted) return;
  2822.         if (((evt || 0).target || 0).id !== 'item-scroller') return;
  2823.         lastMouseDown = lastMouseUp = dateNow();
  2824.         currentMouseDown = false;
  2825.         lastUserInteraction = lastMouseDown;
  2826.         delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2827.       }, passiveCapture);
  2828.  
  2829.  
  2830.       document.addEventListener('mouseup', (evt) => {
  2831.         if (!evt || !evt.isTrusted) return;
  2832.         if (currentMouseDown) {
  2833.           lastMouseUp = dateNow();
  2834.           currentMouseDown = false;
  2835.           lastUserInteraction = lastMouseUp;
  2836.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2837.         }
  2838.       }, passiveCapture);
  2839.  
  2840.  
  2841.       document.addEventListener('pointerup', (evt) => {
  2842.         if (!evt || !evt.isTrusted) return;
  2843.         if (currentMouseDown) {
  2844.           lastMouseUp = dateNow();
  2845.           currentMouseDown = false;
  2846.           lastUserInteraction = lastMouseUp;
  2847.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2848.         }
  2849.       }, passiveCapture);
  2850.  
  2851.       document.addEventListener('touchstart', (evt) => {
  2852.         if (!evt || !evt.isTrusted) return;
  2853.         lastTouchDown = dateNow();
  2854.         currentTouchDown = true;
  2855.         lastUserInteraction = lastTouchDown;
  2856.       }, passiveCapture);
  2857.  
  2858.       document.addEventListener('touchmove', (evt) => {
  2859.         if (!evt || !evt.isTrusted) return;
  2860.         lastTouchDown = dateNow();
  2861.         currentTouchDown = true;
  2862.         lastUserInteraction = lastTouchDown;
  2863.       }, passiveCapture);
  2864.  
  2865.       document.addEventListener('touchend', (evt) => {
  2866.         if (!evt || !evt.isTrusted) return;
  2867.         if (currentTouchDown) {
  2868.           lastTouchUp = dateNow();
  2869.           currentTouchDown = false;
  2870.           lastUserInteraction = lastTouchUp;
  2871.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2872.         }
  2873.       }, passiveCapture);
  2874.  
  2875.       document.addEventListener('touchcancel', (evt) => {
  2876.         if (!evt || !evt.isTrusted) return;
  2877.         if (currentTouchDown) {
  2878.           lastTouchUp = dateNow();
  2879.           currentTouchDown = false;
  2880.           lastUserInteraction = lastTouchUp;
  2881.           delayFlushActiveItemsAfterUserActionK_ && delayFlushActiveItemsAfterUserActionK_();
  2882.         }
  2883.       }, passiveCapture);
  2884.  
  2885.  
  2886.     }
  2887.  
  2888.  
  2889.     const onRegistryReadyForDOMOperations = () => {
  2890.  
  2891.       let firstCheckedOnYtInit = false;
  2892.  
  2893.       const assertorURL = () => assertor(() => location.pathname.startsWith('/live_chat') && (location.search.indexOf('continuation=') > 0 || location.search.indexOf('v=') > 0));
  2894.  
  2895.       const mightFirstCheckOnYtInit = () => {
  2896.         if (firstCheckedOnYtInit) return;
  2897.         firstCheckedOnYtInit = true;
  2898.  
  2899.         if (!document.body || !document.head) return;
  2900.         if (!assertorURL()) return;
  2901.  
  2902.         addCssManaged();
  2903.  
  2904.         let efsContainer = document.getElementById('elzm-fonts-yk75g');
  2905.         if (efsContainer && efsContainer.parentNode !== document.body) {
  2906.           document.body.appendChild(efsContainer);
  2907.         }
  2908.  
  2909.       };
  2910.  
  2911.       if (!assertorURL()) return;
  2912.       // if (!assertor(() => document.getElementById('yt-masthead') === null)) return;
  2913.  
  2914.       if (document.documentElement && document.head) {
  2915.         addCssManaged();
  2916.       }
  2917.       // console.log(document.body===null)
  2918.  
  2919.       customElements.whenDefined('yt-live-chat-item-list-renderer').then(() => {
  2920.  
  2921.         const tag = "yt-live-chat-item-list-renderer"
  2922.         const dummy = document.createElement(tag);
  2923.  
  2924.         const cProto = getProto(dummy);
  2925.         if (!cProto || !cProto.attached) {
  2926.           console.warn(`proto.attached for ${tag} is unavailable.`);
  2927.           return;
  2928.         }
  2929.  
  2930.         mightFirstCheckOnYtInit();
  2931.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-item-list-renderer hacks");
  2932.         console.log("[Begin]");
  2933.  
  2934.         const mclp = cProto;
  2935.         try {
  2936.           assertor(() => typeof mclp.scrollToBottom_ === 'function');
  2937.           assertor(() => typeof mclp.flushActiveItems_ === 'function');
  2938.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2939.           assertor(() => typeof mclp.setAtBottom === 'function');
  2940.           assertor(() => typeof mclp.scrollToBottom66_ === 'undefined');
  2941.           assertor(() => typeof mclp.flushActiveItems66_ === 'undefined');
  2942.         } catch (e) { }
  2943.  
  2944.  
  2945.         try {
  2946.           assertor(() => typeof mclp.attached === 'function');
  2947.           assertor(() => typeof mclp.detached === 'function');
  2948.           assertor(() => typeof mclp.canScrollToBottom_ === 'function');
  2949.           assertor(() => typeof mclp.isSmoothScrollEnabled_ === 'function');
  2950.           assertor(() => typeof mclp.maybeResizeScrollContainer_ === 'function');
  2951.           assertor(() => typeof mclp.refreshOffsetContainerHeight_ === 'function');
  2952.           assertor(() => typeof mclp.smoothScroll_ === 'function');
  2953.           assertor(() => typeof mclp.resetSmoothScroll_ === 'function');
  2954.         } catch (e) { }
  2955.  
  2956.         mclp.__intermediate_delay__ = null;
  2957.  
  2958.         let mzk = 0;
  2959.         let myk = 0;
  2960.         let mlf = 0;
  2961.         let myw = 0;
  2962.         let mzt = 0;
  2963.         let zarr = null;
  2964.         let mlg = 0;
  2965.  
  2966.         if ((mclp.clearList || 0).length === 0) {
  2967.           assertor(() => fnIntegrity(mclp.clearList, '0.106.50'));
  2968.           mclp.clearList66 = mclp.clearList;
  2969.           mclp.clearList = function () {
  2970.             mzk++;
  2971.             myk++;
  2972.             mlf++;
  2973.             myw++;
  2974.             mzt++;
  2975.             mlg++;
  2976.             zarr = null;
  2977.             this.__intermediate_delay__ = null;
  2978.             this.clearList66();
  2979.           };
  2980.           console.log("clearList", "OK");
  2981.         } else {
  2982.           console.log("clearList", "NG");
  2983.         }
  2984.  
  2985.  
  2986.         let onListRendererAttachedDone = false;
  2987.  
  2988.         function setList(itemOffset, items) {
  2989.  
  2990.           const isFirstTime = onListRendererAttachedDone === false;
  2991.  
  2992.           if (isFirstTime) {
  2993.             onListRendererAttachedDone = true;
  2994.             Promise.resolve().then(watchUserCSS);
  2995.             addCssManaged();
  2996.             setupEvents();
  2997.           }
  2998.  
  2999.           setupStyle(itemOffset, items);
  3000.  
  3001.           setupMutObserver(items);
  3002.         }
  3003.  
  3004.         mclp.attached419 = async function () {
  3005.  
  3006.           if (!this.isAttached) return;
  3007.  
  3008.           let maxTrial = 16;
  3009.           while (!this.$ || !this.$['item-scroller'] || !this.$['item-offset'] || !this.$['items']) {
  3010.             if (--maxTrial < 0 || !this.isAttached) return;
  3011.             await new Promise(requestAnimationFrame);
  3012.           }
  3013.  
  3014.           if (this.isAttached !== true) return;
  3015.  
  3016.           if (!this.$) {
  3017.             console.warn("!this.$");
  3018.             return;
  3019.           }
  3020.           if (!this.$) return;
  3021.           /** @type {HTMLElement | null} */
  3022.           const itemScroller = this.$['item-scroller'];
  3023.           /** @type {HTMLElement | null} */
  3024.           const itemOffset = this.$['item-offset'];
  3025.           /** @type {HTMLElement | null} */
  3026.           const items = this.$['items'];
  3027.  
  3028.           if (!itemScroller || !itemOffset || !items) {
  3029.             console.warn("items.parentNode !== itemOffset");
  3030.             return;
  3031.           }
  3032.  
  3033.           if (nodeParent(items) !== itemOffset) {
  3034.  
  3035.             console.warn("items.parentNode !== itemOffset");
  3036.             return;
  3037.           }
  3038.  
  3039.  
  3040.           if (items.id !== 'items' || itemOffset.id !== "item-offset") {
  3041.  
  3042.             console.warn("id incorrect");
  3043.             return;
  3044.           }
  3045.  
  3046.           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')
  3047.  
  3048.           if (!isTargetItems) {
  3049.             console.warn("!isTargetItems");
  3050.             return;
  3051.           }
  3052.  
  3053.           setList(itemOffset, items);
  3054.  
  3055.         }
  3056.  
  3057.         mclp.attached331 = mclp.attached;
  3058.         mclp.attached = function () {
  3059.           this.attached419 && this.attached419();
  3060.           return this.attached331();
  3061.         }
  3062.  
  3063.         mclp.detached331 = mclp.detached;
  3064.  
  3065.         mclp.detached = function () {
  3066.           setupMutObserver();
  3067.           return this.detached331();
  3068.         }
  3069.  
  3070.         const t29s = document.querySelectorAll("yt-live-chat-item-list-renderer");
  3071.         for (const t29 of t29s) {
  3072.           if ((t29.inst || t29).isAttached === true) {
  3073.             t29.attached419();
  3074.           }
  3075.         }
  3076.  
  3077.         if ((mclp.async || 0).length === 2 && (mclp.cancelAsync || 0).length === 1) {
  3078.  
  3079.           assertor(() => fnIntegrity(mclp.async, '2.24.15'));
  3080.           assertor(() => fnIntegrity(mclp.cancelAsync, '1.15.8'));
  3081.  
  3082.           /** @type {Map<number, any>} */
  3083.           const aMap = new Map();
  3084.           let count = 6150;
  3085.           mclp.async66 = mclp.async;
  3086.           mclp.async = function (e, f) {
  3087.             // ensure the previous operation is done
  3088.             // .async is usually after the time consuming functions like flushActiveItems_ and scrollToBottom_
  3089.             const hasF = arguments.length === 2;
  3090.             const stack = new Error().stack;
  3091.             const isFlushAsync = stack.indexOf('flushActiveItems_') >= 0;
  3092.             if (count > 1e9) count = 6159;
  3093.             const resId = ++count;
  3094.             aMap.set(resId, e);
  3095.             (this.__intermediate_delay__ || Promise.resolve()).then(rk => {
  3096.               const rp = aMap.get(resId);
  3097.               if (typeof rp !== 'function') {
  3098.                 return;
  3099.               }
  3100.               let cancelCall = false;
  3101.               if (isFlushAsync) {
  3102.                 if (rk < 0) {
  3103.                   cancelCall = true;
  3104.                 } else if (rk === 2 && arguments[0] === this.maybeScrollToBottom_) {
  3105.                   cancelCall = true;
  3106.                 }
  3107.               }
  3108.               if (cancelCall) {
  3109.                 aMap.delete(resId);
  3110.               } else {
  3111.                 const asyncEn = function () {
  3112.                   aMap.delete(resId);
  3113.                   return rp.apply(this, arguments);
  3114.                 };
  3115.                 aMap.set(resId, hasF ? this.async66(asyncEn, f) : this.async66(asyncEn));
  3116.               }
  3117.             });
  3118.  
  3119.             return resId;
  3120.           }
  3121.  
  3122.           mclp.cancelAsync66 = mclp.cancelAsync;
  3123.           mclp.cancelAsync = function (resId) {
  3124.             if (resId <= 6150) {
  3125.               this.cancelAsync66(resId);
  3126.             } else if (aMap.has(resId)) {
  3127.               const rp = aMap.get(resId);
  3128.               aMap.delete(resId);
  3129.               if (typeof rp !== 'function') {
  3130.                 this.cancelAsync66(rp);
  3131.               }
  3132.             }
  3133.           }
  3134.  
  3135.           console.log("async", "OK");
  3136.         } else {
  3137.           console.log("async", "NG");
  3138.         }
  3139.  
  3140.  
  3141.         if ((mclp.showNewItems_ || 0).length === 0 && ENABLE_NO_SMOOTH_TRANSFORM) {
  3142.  
  3143.           assertor(() => fnIntegrity(mclp.showNewItems_, '0.170.79'));
  3144.           mclp.showNewItems66_ = mclp.showNewItems_;
  3145.  
  3146.           mclp.showNewItems77_ = async function () {
  3147.             if (myk > 1e9) myk = 9;
  3148.             let tid = ++myk;
  3149.  
  3150.             await new Promise(requestAnimationFrame);
  3151.  
  3152.             if (tid !== myk) {
  3153.               return;
  3154.             }
  3155.  
  3156.             const cnt = this;
  3157.  
  3158.             await Promise.resolve();
  3159.             cnt.showNewItems66_();
  3160.  
  3161.             await Promise.resolve();
  3162.  
  3163.           }
  3164.  
  3165.           mclp.showNewItems_ = function () {
  3166.  
  3167.             const cnt = this;
  3168.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3169.               cnt.showNewItems77_().then(() => {
  3170.                 resolve();
  3171.               });
  3172.             });
  3173.           }
  3174.  
  3175.           console.log("showNewItems_", "OK");
  3176.         } else {
  3177.           console.log("showNewItems_", "NG");
  3178.         }
  3179.  
  3180.  
  3181.         if ((mclp.flushActiveItems_ || 0).length === 0) {
  3182.  
  3183.           assertor(() => fnIntegrity(mclp.flushActiveItems_, '0.137.81'));
  3184.  
  3185.           let hasMoreMessageState = !ENABLE_SHOW_MORE_BLINKER ? -1 : 0;
  3186.  
  3187.           let contensWillChangeController = null;
  3188.  
  3189.           mclp.flushActiveItems66_ = mclp.flushActiveItems_;
  3190.  
  3191.           mclp.flushActiveItems78_ = async function (tid) {
  3192.             try {
  3193.               if (tid !== mlf) return;
  3194.               const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3195.               let logger = false;
  3196.               const cnt = this;
  3197.               let immd = cnt.__intermediate_delay__;
  3198.               await new Promise(requestAnimationFrame);
  3199.  
  3200.               if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3201.               if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return;
  3202.  
  3203.               mlf++;
  3204.               if (mlg > 1e9) mlg = 9;
  3205.               ++mlg;
  3206.  
  3207.               const tmpMaxItemsCount = this.data.maxItemsToDisplay;
  3208.               const reducedMaxItemsToDisplay = MAX_ITEMS_FOR_FULL_FLUSH;
  3209.               let changeMaxItemsToDisplay = false;
  3210.               const activeItemsLen = this.activeItems_.length;
  3211.               if (activeItemsLen > tmpMaxItemsCount && tmpMaxItemsCount > 0) {
  3212.                 logger = true;
  3213.  
  3214.                 groupCollapsed("YouTube Super Fast Chat", " | flushActiveItems78_");
  3215.  
  3216.                 logger && console.log('[Begin]')
  3217.  
  3218.                 console.log('this.activeItems_.length > N', activeItemsLen, tmpMaxItemsCount);
  3219.                 if (ENABLE_REDUCED_MAXITEMS_FOR_FLUSH && lockedMaxItemsToDisplay === tmpMaxItemsCount && lockedMaxItemsToDisplay !== reducedMaxItemsToDisplay) {
  3220.                   console.log('reduce maxitems');
  3221.                   if (tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3222.                     // as all the rendered chats are already "outdated"
  3223.                     // all old chats shall remove and reduced number of few chats will be rendered
  3224.                     // then restore to the original number
  3225.                     changeMaxItemsToDisplay = true;
  3226.                     this.data.maxItemsToDisplay = reducedMaxItemsToDisplay;
  3227.                     console.log(`'maxItemsToDisplay' is reduced from ${tmpMaxItemsCount} to ${reducedMaxItemsToDisplay}.`)
  3228.                   }
  3229.                   this.activeItems_.splice(0, activeItemsLen - this.data.maxItemsToDisplay);
  3230.                   //   console.log('changeMaxItemsToDisplay 01', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3231.  
  3232.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3233.                 } else {
  3234.                   this.activeItems_.splice(0, activeItemsLen - (tmpMaxItemsCount < 900 ? tmpMaxItemsCount : 900));
  3235.  
  3236.                   console.log('new this.activeItems_.length > N', this.activeItems_.length);
  3237.                 }
  3238.               }
  3239.               // it is found that it will render all stacked chats after switching back from background
  3240.               // to avoid lagging in popular livestream with massive chats, trim first before rendering.
  3241.               // this.activeItems_.length > this.data.maxItemsToDisplay && this.activeItems_.splice(0, this.activeItems_.length - this.data.maxItemsToDisplay);
  3242.  
  3243.  
  3244.               const items = (cnt.$ || 0).items;
  3245.  
  3246.               if (USE_WILL_CHANGE_CONTROLLER) {
  3247.                 if (contensWillChangeController && contensWillChangeController.element !== items) {
  3248.                   contensWillChangeController.release();
  3249.                   contensWillChangeController = null;
  3250.                 }
  3251.                 if (!contensWillChangeController) contensWillChangeController = new WillChangeController(items, 'contents');
  3252.               }
  3253.               const wcController = contensWillChangeController;
  3254.               cnt.__intermediate_delay__ = Promise.all([cnt.__intermediate_delay__ || null, immd || null]);
  3255.               wcController && wcController.beforeOper();
  3256.               await Promise.resolve();
  3257.               const acItems = cnt.activeItems_;
  3258.               const len1 = acItems.length;
  3259.               if (!len1) console.warn('cnt.activeItems_.length = 0');
  3260.               let waitFor = [];
  3261.  
  3262.  
  3263.               /** @type {Set<string>} */
  3264.               const imageLinks = new Set();
  3265.  
  3266.               if (ENABLE_PRELOAD_THUMBNAIL || EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL) {
  3267.                 for (const item of acItems) {
  3268.                   fixLiveChatItem(item, imageLinks);
  3269.                 }
  3270.               }
  3271.               if (ENABLE_PRELOAD_THUMBNAIL && kptPF !== null && (kptPF & (8 | 4)) && imageLinks.size > 0) {
  3272.                 if (emojiPrefetched.size > PREFETCH_LIMITED_SIZE_EMOJI) emojiPrefetched.clear();
  3273.                 if (authorPhotoPrefetched.size > PREFETCH_LIMITED_SIZE_AUTHOR_PHOTO) authorPhotoPrefetched.clear();
  3274.  
  3275.                 // reference: https://github.com/Yuanfang-fe/Blog-X/issues/34
  3276.                 const rel = kptPF & 8 ? 'subresource' : kptPF & 16 ? 'preload' : kptPF & 4 ? 'prefetch' : '';
  3277.                 // preload performs the high priority fetching.
  3278.                 // prefetch delays the chat display if the video resoruce is demanding.
  3279.  
  3280.                 if (rel) {
  3281.  
  3282.                   imageLinks.forEach(imageLink => {
  3283.                     let d = false;
  3284.                     const isEmoji = imageLink.includes('/emoji/');
  3285.                     const pretechedSet = isEmoji ? emojiPrefetched : authorPhotoPrefetched;
  3286.                     if (!pretechedSet.has(imageLink)) {
  3287.                       pretechedSet.add(imageLink);
  3288.                       d = true;
  3289.                     }
  3290.                     if (d) {
  3291.                       waitFor.push(linker(null, rel, imageLink, 'image'));
  3292.  
  3293.                     }
  3294.                   })
  3295.  
  3296.                 }
  3297.  
  3298.               }
  3299.  
  3300.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3301.               // console.log('ss1', Date.now())
  3302.               if (waitFor.length > 0) {
  3303.                 await Promise.race([new Promise(r => setTimeout(r, 250)), Promise.all(waitFor)]);
  3304.               }
  3305.               waitFor.length = 0;
  3306.               waitFor = null;
  3307.               // console.log('ss2', Date.now())
  3308.               cnt.flushActiveItems66_();
  3309.               skipDontRender = ((cnt.visibleItems || 0).length || 0) === 0;
  3310.               const len2 = cnt.activeItems_.length;
  3311.               const bAsync = len1 !== len2;
  3312.               await Promise.resolve();
  3313.               if (wcController) {
  3314.                 if (bAsync) {
  3315.                   cnt.async(() => {
  3316.                     wcController.afterOper();
  3317.                   });
  3318.                 } else {
  3319.                   wcController.afterOper();
  3320.                 }
  3321.               }
  3322.               if (changeMaxItemsToDisplay && this.data.maxItemsToDisplay === reducedMaxItemsToDisplay && tmpMaxItemsCount > reducedMaxItemsToDisplay) {
  3323.                 this.data.maxItemsToDisplay = tmpMaxItemsCount;
  3324.  
  3325.                 logger && console.log(`'maxItemsToDisplay' is restored from ${reducedMaxItemsToDisplay} to ${tmpMaxItemsCount}.`);
  3326.                 //   console.log('changeMaxItemsToDisplay 02', this.data.maxItemsToDisplay, oMaxItemsToDisplay, reducedMaxItemsToDisplay)
  3327.               } else if (changeMaxItemsToDisplay) {
  3328.  
  3329.                 logger && console.log(`'maxItemsToDisplay' cannot be restored`, {
  3330.                   maxItemsToDisplay: this.data.maxItemsToDisplay,
  3331.                   reducedMaxItemsToDisplay,
  3332.                   originalMaxItemsToDisplay: tmpMaxItemsCount
  3333.                 });
  3334.               }
  3335.               logger && console.log('[End]')
  3336.  
  3337.               logger && console.groupEnd();
  3338.  
  3339.               if (!ENABLE_NO_SMOOTH_TRANSFORM) {
  3340.  
  3341.  
  3342.                 const ff = () => {
  3343.  
  3344.                   if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3345.                   //   if (tid !== mlf || cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3346.                   if (!cnt.atBottom && cnt.allowScroll && cnt.hasUserJustInteracted11_ && !cnt.hasUserJustInteracted11_()) {
  3347.                     cnt.scrollToBottom_();
  3348.  
  3349.                     Promise.resolve().then(() => {
  3350.  
  3351.                       if (cnt.isAttached === false || (cnt.hostElement || cnt).isConnected === false) return;
  3352.                       if (!cnt.canScrollToBottom_()) cnt.scrollToBottom_();
  3353.                     });
  3354.  
  3355.  
  3356.                   }
  3357.                 }
  3358.  
  3359.                 ff();
  3360.  
  3361.  
  3362.                 Promise.resolve().then(ff);
  3363.  
  3364.                 // requestAnimationFrame(ff);
  3365.               } else if (true) { // it might not be sticky to bottom when there is a full refresh.
  3366.  
  3367.                 const knt = cnt;
  3368.                 if (!scrollChatFn) {
  3369.                   const cnt = knt;
  3370.                   const f = () => {
  3371.                     const itemScroller = cnt.itemScroller;
  3372.                     if (!itemScroller || itemScroller.isConnected === false || cnt.isAttached === false) return;
  3373.                     if (!cnt.atBottom) {
  3374.                       cnt.scrollToBottom_();
  3375.                     } else if (itemScroller.scrollTop === 0) { // not yet interacted by user; cannot stick to bottom
  3376.                       itemScroller.scrollTop = itemScroller.scrollHeight;
  3377.                     }
  3378.                   };
  3379.                   scrollChatFn = () => Promise.resolve().then(f).then(f);
  3380.                 }
  3381.  
  3382.                 if (!ENABLE_DELAYED_CHAT_OCCURRENCE) scrollChatFn();
  3383.               }
  3384.  
  3385.               return 1;
  3386.  
  3387.  
  3388.             } catch (e) {
  3389.               console.warn(e);
  3390.             }
  3391.           }
  3392.  
  3393.           mclp.flushActiveItems77_ = function () {
  3394.  
  3395.             return new Promise(resResolve => {
  3396.               try {
  3397.                 const cnt = this;
  3398.                 if (mlf > 1e9) mlf = 9;
  3399.                 let tid = ++mlf;
  3400.                 const hostElement = cnt.hostElement || cnt;
  3401.                 if (tid !== mlf || cnt.isAttached === false || hostElement.isConnected === false) return resResolve();
  3402.                 if (!cnt.activeItems_ || cnt.activeItems_.length === 0) return resResolve();
  3403.  
  3404.                 // 4 times to maxItems to avoid frequent trimming.
  3405.                 // 1 ... 10 ... 20 ... 30 ... 40 ... 50 ... 60 => 16 ... 20 ... 30 ..... 60 ... => 16
  3406.  
  3407.                 const lockedMaxItemsToDisplay = this.data.maxItemsToDisplay944;
  3408.                 this.activeItems_.length > lockedMaxItemsToDisplay * 4 && lockedMaxItemsToDisplay > 4 && this.activeItems_.splice(0, this.activeItems_.length - lockedMaxItemsToDisplay - 1);
  3409.                 if (cnt.canScrollToBottom_()) {
  3410.                   cnt.mutexPromiseFA78 = (cnt.mutexPromiseFA78 || Promise.resolve())
  3411.                     .then(() => cnt.flushActiveItems78_(tid)) // async function
  3412.                     .then((asyncResult) => {
  3413.                       resResolve(asyncResult); // either undefined or 1
  3414.                       resResolve = null;
  3415.                     }).catch((e) => {
  3416.                       console.warn(e);
  3417.                       if (resResolve) resResolve();
  3418.                     });
  3419.                 } else {
  3420.                   resResolve(2);
  3421.                   resResolve = null;
  3422.                 }
  3423.               } catch (e) {
  3424.                 console.warn(e);
  3425.                 if (resResolve) resResolve();
  3426.               }
  3427.  
  3428.  
  3429.             });
  3430.  
  3431.           }
  3432.  
  3433.           mclp.flushActiveItems_ = function () {
  3434.             const cnt = this;
  3435.  
  3436.             if (arguments.length !== 0 || !cnt.activeItems_ || !cnt.canScrollToBottom_) return cnt.flushActiveItems66_.apply(this, arguments);
  3437.  
  3438.             if (cnt.activeItems_.length === 0) {
  3439.               cnt.__intermediate_delay__ = null;
  3440.               return;
  3441.             }
  3442.  
  3443.             const cntData = ((cnt || 0).data || 0);
  3444.             if (cntData.maxItemsToDisplay944 === undefined) {
  3445.               cntData.maxItemsToDisplay944 = null;
  3446.               if (cntData.maxItemsToDisplay > MAX_ITEMS_FOR_TOTAL_DISPLAY) cntData.maxItemsToDisplay = MAX_ITEMS_FOR_TOTAL_DISPLAY;
  3447.               cntData.maxItemsToDisplay944 = cntData.maxItemsToDisplay || null;
  3448.             }
  3449.  
  3450.             // ignore previous __intermediate_delay__ and create a new one
  3451.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3452.               cnt.flushActiveItems77_().then(rt => {  // either undefined or 1 or 2
  3453.                 if (rt === 1) {
  3454.                   resolve(1); // success, scroll to bottom
  3455.                   if (hasMoreMessageState === 1) {
  3456.                     hasMoreMessageState = 0;
  3457.                     const showMore = (cnt.$ || 0)['show-more'];
  3458.                     if (showMore) {
  3459.                       showMore.classList.remove('has-new-messages-miuzp');
  3460.                     }
  3461.                   }
  3462.                 }
  3463.                 else if (rt === 2) {
  3464.                   resolve(2); // success, trim
  3465.                   if (hasMoreMessageState === 0) {
  3466.                     hasMoreMessageState = 1;
  3467.                     const showMore = cnt.$['show-more'];
  3468.                     if (showMore) {
  3469.                       showMore.classList.add('has-new-messages-miuzp');
  3470.                     }
  3471.                   }
  3472.                 }
  3473.                 else resolve(-1); // skip
  3474.               }).catch(e => {
  3475.                 console.warn(e);
  3476.               });
  3477.             });
  3478.  
  3479.           }
  3480.           console.log("flushActiveItems_", "OK");
  3481.         } else {
  3482.           console.log("flushActiveItems_", "NG");
  3483.         }
  3484.  
  3485.         mclp.delayFlushActiveItemsAfterUserAction11_ = async function () {
  3486.           try {
  3487.             if (mlg > 1e9) mlg = 9;
  3488.             const tid = ++mlg;
  3489.             const keepTrialCond = () => this.atBottom && this.allowScroll && (tid === mlg) && this.isAttached === true && this.activeItems_.length >= 1 && (this.hostElement || 0).isConnected === true;
  3490.             const runCond = () => this.canScrollToBottom_();
  3491.             if (!keepTrialCond()) return;
  3492.             if (runCond()) return this.flushActiveItems_() | 1; // avoid return promise
  3493.             await new Promise(r => setTimeout(r, 80));
  3494.             if (!keepTrialCond()) return;
  3495.             if (runCond()) return this.flushActiveItems_() | 1;
  3496.             await new Promise(requestAnimationFrame);
  3497.             if (runCond()) return this.flushActiveItems_() | 1;
  3498.           } catch (e) {
  3499.             console.warn(e);
  3500.           }
  3501.         }
  3502.  
  3503.         if ((mclp.atBottomChanged_ || 0).length === 1) {
  3504.           // note: if the scrolling is too frequent, the show more visibility might get wrong.
  3505.           assertor(() => fnIntegrity(mclp.atBottomChanged_, '1.75.39'));
  3506.  
  3507.           const querySelector = HTMLElement.prototype.querySelector;
  3508.           const U = (element) => ({
  3509.             querySelector: (selector) => querySelector.call(element, selector)
  3510.           });
  3511.  
  3512.           let qid = 0;
  3513.           mclp.atBottomChanged_ = function (a) {
  3514.             let tid = ++qid;
  3515.             let b = this;
  3516.             a ? this.hideShowMoreAsync_ || (this.hideShowMoreAsync_ = this.async(function () {
  3517.               if (tid !== qid) return;
  3518.               U(b.hostElement).querySelector("#show-more").style.visibility = "hidden"
  3519.             }, 200)) : (this.hideShowMoreAsync_ && this.cancelAsync(this.hideShowMoreAsync_),
  3520.               this.hideShowMoreAsync_ = null,
  3521.               U(this.hostElement).querySelector("#show-more").style.visibility = "visible")
  3522.           }
  3523.  
  3524.           console.log("atBottomChanged_", "OK");
  3525.         } else {
  3526.           console.log("atBottomChanged_", "NG");
  3527.         }
  3528.  
  3529.         if ((mclp.onScrollItems_ || 0).length === 1) {
  3530.  
  3531.           assertor(() => fnIntegrity(mclp.onScrollItems_, '1.17.9'));
  3532.           mclp.onScrollItems66_ = mclp.onScrollItems_;
  3533.           mclp.onScrollItems77_ = async function (evt) {
  3534.             if (myw > 1e9) myw = 9;
  3535.             let tid = ++myw;
  3536.  
  3537.             await new Promise(requestAnimationFrame);
  3538.  
  3539.             if (tid !== myw) {
  3540.               return;
  3541.             }
  3542.  
  3543.             const cnt = this;
  3544.  
  3545.             await Promise.resolve();
  3546.             if (USE_OPTIMIZED_ON_SCROLL_ITEMS) {
  3547.               await Promise.resolve().then(() => {
  3548.                 this.ytRendererBehavior.onScroll(evt);
  3549.               }).then(() => {
  3550.                 if (this.canScrollToBottom_()) {
  3551.                   const hasUserJustInteracted = this.hasUserJustInteracted11_ ? this.hasUserJustInteracted11_() : true;
  3552.                   if (hasUserJustInteracted) {
  3553.                     // only when there is an user action
  3554.                     this.setAtBottom();
  3555.                     return 1;
  3556.                   }
  3557.                 } else {
  3558.                   // no message inserting
  3559.                   this.setAtBottom();
  3560.                   return 1;
  3561.                 }
  3562.               }).then((r) => {
  3563.  
  3564.                 if (this.activeItems_.length) {
  3565.  
  3566.                   if (this.canScrollToBottom_()) {
  3567.                     this.flushActiveItems_();
  3568.                     return 1 && r;
  3569.                   } else if (this.atBottom && this.allowScroll && (this.hasUserJustInteracted11_ && this.hasUserJustInteracted11_())) {
  3570.                     // delayed due to user action
  3571.                     this.delayFlushActiveItemsAfterUserAction11_ && this.delayFlushActiveItemsAfterUserAction11_();
  3572.                     return 0;
  3573.                   }
  3574.                 }
  3575.               }).then((r) => {
  3576.                 if (r) {
  3577.                   // ensure setAtBottom is correctly set
  3578.                   this.setAtBottom();
  3579.                 }
  3580.               });
  3581.             } else {
  3582.               cnt.onScrollItems66_(evt);
  3583.             }
  3584.  
  3585.             await Promise.resolve();
  3586.  
  3587.           }
  3588.  
  3589.           mclp.onScrollItems_ = function (evt) {
  3590.  
  3591.             const cnt = this;
  3592.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3593.               cnt.onScrollItems77_(evt).then(() => {
  3594.                 resolve();
  3595.               });
  3596.             });
  3597.           }
  3598.           console.log("onScrollItems_", "OK");
  3599.         } else {
  3600.           console.log("onScrollItems_", "NG");
  3601.         }
  3602.  
  3603.         if ((mclp.handleLiveChatActions_ || 0).length === 1) {
  3604.  
  3605.           assertor(() => fnIntegrity(mclp.handleLiveChatActions_, '1.31.17'));
  3606.           mclp.handleLiveChatActions66_ = mclp.handleLiveChatActions_;
  3607.  
  3608.           mclp.handleLiveChatActions77_ = async function (arr) {
  3609.             if (typeof (arr || 0).length !== 'number') {
  3610.               this.handleLiveChatActions66_(arr);
  3611.               return;
  3612.             }
  3613.             if (mzt > 1e9) mzt = 9;
  3614.             let tid = ++mzt;
  3615.  
  3616.             if (zarr === null) zarr = arr;
  3617.             else Array.prototype.push.apply(zarr, arr);
  3618.             arr = null;
  3619.  
  3620.             await new Promise(requestAnimationFrame);
  3621.  
  3622.             if (tid !== mzt || zarr === null) {
  3623.               return;
  3624.             }
  3625.  
  3626.             const carr = zarr;
  3627.             zarr = null;
  3628.  
  3629.             await Promise.resolve();
  3630.             this.handleLiveChatActions66_(carr);
  3631.             await Promise.resolve();
  3632.  
  3633.           }
  3634.  
  3635.           mclp.handleLiveChatActions_ = function (arr) {
  3636.  
  3637.             const cnt = this;
  3638.             cnt.__intermediate_delay__ = new Promise(resolve => {
  3639.               cnt.handleLiveChatActions77_(arr).then(() => {
  3640.                 resolve();
  3641.               });
  3642.             });
  3643.           }
  3644.           console.log("handleLiveChatActions_", "OK");
  3645.         } else {
  3646.           console.log("handleLiveChatActions_", "NG");
  3647.         }
  3648.  
  3649.         mclp.hasUserJustInteracted11_ = () => {
  3650.           const t = dateNow();
  3651.           return (t - lastWheel < 80) || currentMouseDown || currentTouchDown || (t - lastUserInteraction < 80);
  3652.         }
  3653.  
  3654.         if ((mclp.canScrollToBottom_ || 0).length === 0) {
  3655.  
  3656.           assertor(() => fnIntegrity(mclp.canScrollToBottom_, '0.9.5'));
  3657.  
  3658.           mclp.canScrollToBottom_ = function () {
  3659.             return this.atBottom && this.allowScroll && !this.hasUserJustInteracted11_();
  3660.           }
  3661.  
  3662.           console.log("canScrollToBottom_", "OK");
  3663.         } else {
  3664.           console.log("canScrollToBottom_", "NG");
  3665.         }
  3666.  
  3667.         if (ENABLE_NO_SMOOTH_TRANSFORM) {
  3668.  
  3669.           mclp.isSmoothScrollEnabled_ = function () {
  3670.             return false;
  3671.           }
  3672.  
  3673.           mclp.maybeResizeScrollContainer_ = function () {
  3674.             //
  3675.           }
  3676.  
  3677.           mclp.refreshOffsetContainerHeight_ = function () {
  3678.             //
  3679.           }
  3680.  
  3681.           mclp.smoothScroll_ = function () {
  3682.             //
  3683.           }
  3684.  
  3685.           mclp.resetSmoothScroll_ = function () {
  3686.             //
  3687.           }
  3688.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "OK");
  3689.         } else {
  3690.           console.log("ENABLE_NO_SMOOTH_TRANSFORM", "NG");
  3691.         }
  3692.  
  3693.         if (typeof mclp.handleAddChatItemAction_ === 'function' && !mclp.handleAddChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3694.  
  3695.           mclp.handleAddChatItemAction66_ = mclp.handleAddChatItemAction_;
  3696.           mclp.handleAddChatItemAction_ = function (a) {
  3697.             try {
  3698.               if (a && typeof a === 'object' && !('length' in a)) {
  3699.                 fixLiveChatItem(a.item, null);
  3700.                 console.assert(arguments[0] === a);
  3701.               }
  3702.             } catch (e) { console.warn(e) }
  3703.             return this.handleAddChatItemAction66_.apply(this, arguments);
  3704.           }
  3705.  
  3706.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3707.         } else {
  3708.  
  3709.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION) console.log("handleAddChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_ADDITION ]", "OK");
  3710.         }
  3711.  
  3712.  
  3713.         if (typeof mclp.handleReplaceChatItemAction_ === 'function' && !mclp.handleReplaceChatItemAction66_ && FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT && (EMOJI_IMAGE_SINGLE_THUMBNAIL || AUTHOR_PHOTO_SINGLE_THUMBNAIL)) {
  3714.  
  3715.           mclp.handleReplaceChatItemAction66_ = mclp.handleReplaceChatItemAction_;
  3716.           mclp.handleReplaceChatItemAction_ = function (a) {
  3717.             try {
  3718.               if (a && typeof a === 'object' && !('length' in a)) {
  3719.                 fixLiveChatItem(a.replacementItem, null);
  3720.                 console.assert(arguments[0] === a);
  3721.               }
  3722.             } catch (e) { console.warn(e) }
  3723.             return this.handleReplaceChatItemAction66_.apply(this, arguments);
  3724.           }
  3725.  
  3726.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3727.         } else {
  3728.  
  3729.           if (FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT) console.log("handleReplaceChatItemAction_ [ FIX_THUMBNAIL_SIZE_ON_ITEM_REPLACEMENT ]", "OK");
  3730.         }
  3731.  
  3732.         console.log("[End]");
  3733.         console.groupEnd();
  3734.  
  3735.       }).catch(console.warn);
  3736.  
  3737.  
  3738.       const tickerContainerSetAttribute = function (attrName, attrValue) { // ensure '14.30000001%'.toFixed(1)
  3739.  
  3740.         let yd = (this.__dataHost || (this.inst || 0).__dataHost || 0).__data;
  3741.  
  3742.         if (arguments.length === 2 && attrName === 'style' && yd && attrValue) {
  3743.  
  3744.           // let v = yd.containerStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
  3745.           let v = `${attrValue}`;
  3746.           // conside a ticker is 101px width
  3747.           // 1% = 1.01px
  3748.           // 0.2% = 0.202px
  3749.  
  3750.  
  3751.           const ratio1 = (yd.ratio * 100);
  3752.           if (ratio1 > -1) { // avoid NaN
  3753.  
  3754.             // countdownDurationMs
  3755.             // 600000 - 0.2%    <1% = 6s>  <0.2% = 1.2s>
  3756.             // 300000 - 0.5%    <1% = 3s>  <0.5% = 1.5s>
  3757.             // 150000 - 1%    <1% = 1.5s>
  3758.             // 75000 - 2%    <1% =0.75s > <2% = 1.5s>
  3759.             // 30000 - 5%    <1% =0.3s > <5% = 1.5s>
  3760.  
  3761.             // 99px * 5% = 4.95px
  3762.  
  3763.             // 15000 - 10%    <1% =0.15s > <10% = 1.5s>
  3764.  
  3765.  
  3766.             // 1% Duration
  3767.  
  3768.             let ratio2 = ratio1;
  3769.  
  3770.             const ydd = yd.data;
  3771.             if (ydd) {
  3772.  
  3773.               const d1 = ydd.durationSec;
  3774.               const d2 = ydd.fullDurationSec;
  3775.  
  3776.               // @ step timing [min. 0.2%]
  3777.               let numOfSteps = 500;
  3778.               if ((d1 === d2 || (d1 + 1 === d2)) && d1 > 1) {
  3779.                 if (d2 > 400) numOfSteps = 500; // 0.2%
  3780.                 else if (d2 > 200) numOfSteps = 200; // 0.5%
  3781.                 else if (d2 > 100) numOfSteps = 100; // 1%
  3782.                 else if (d2 > 50) numOfSteps = 50; // 2%
  3783.                 else if (d2 > 25) numOfSteps = 20; // 5% (max => 99px * 5% = 4.95px)
  3784.                 else numOfSteps = 20;
  3785.               }
  3786.               if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  3787.               if (numOfSteps < 5) numOfSteps = 5;
  3788.  
  3789.               const rd = numOfSteps / 100.0;
  3790.  
  3791.               ratio2 = Math.round(ratio2 * rd) / rd;
  3792.  
  3793.               // ratio2 = Math.round(ratio2 * 5) / 5;
  3794.               ratio2 = ratio2.toFixed(1);
  3795.               v = v.replace(`${ratio1}%`, `${ratio2}%`).replace(`${ratio1}%`, `${ratio2}%`);
  3796.  
  3797.               if (yd.__style_last__ === v) return;
  3798.               yd.__style_last__ = v;
  3799.               // do not consider any delay here.
  3800.               // it shall be inside the looping for all properties changes. all the css background ops are in the same microtask.
  3801.  
  3802.             }
  3803.           }
  3804.  
  3805.           HTMLElement.prototype.setAttribute.call(dr(this), attrName, v);
  3806.  
  3807.  
  3808.         } else {
  3809.           HTMLElement.prototype.setAttribute.apply(dr(this), arguments);
  3810.         }
  3811.  
  3812.       };
  3813.  
  3814.  
  3815.       const fpTicker = (renderer) => {
  3816.         const cnt = renderer.inst || renderer;
  3817.         assertor(() => typeof (cnt || 0).is === 'string');
  3818.         assertor(() => ((cnt || 0).hostElement || 0).nodeType === 1);
  3819.         const container = (cnt.$ || 0).container;
  3820.         if (container) {
  3821.           assertor(() => (container || 0).nodeType === 1);
  3822.           assertor(() => typeof container.setAttribute === 'function');
  3823.           container.setAttribute = tickerContainerSetAttribute;
  3824.         } else {
  3825.           console.warn(`"container" does not exist in ${cnt.is}`);
  3826.         }
  3827.       };
  3828.  
  3829.  
  3830.       const tags = ["yt-live-chat-ticker-paid-message-item-renderer", "yt-live-chat-ticker-paid-sticker-item-renderer",
  3831.         "yt-live-chat-ticker-renderer", "yt-live-chat-ticker-sponsor-item-renderer"];
  3832.  
  3833.  
  3834.       Promise.all(tags.map(tag => customElements.whenDefined(tag))).then(() => {
  3835.  
  3836.         mightFirstCheckOnYtInit();
  3837.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-... hacks");
  3838.         console.log("[Begin]");
  3839.  
  3840.         // << if ENABLE_VIDEO_PROGRESS_STATE_FIX >>
  3841.         let isMainVideoOngoing = null;
  3842.         let mainVideoLastProgress = null;
  3843.         // << end >>
  3844.  
  3845.         for (const tag of tags) {
  3846.           const dummy = document.createElement(tag);
  3847.  
  3848.           const cProto = getProto(dummy);
  3849.           if (!cProto || !cProto.attached) {
  3850.             console.warn(`proto.attached for ${tag} is unavailable.`);
  3851.             continue;
  3852.           }
  3853.  
  3854.           cProto.attached77 = cProto.attached;
  3855.  
  3856.           cProto.attached = function () {
  3857.             fpTicker(this.hostElement || this);
  3858.             return this.attached77();
  3859.           }
  3860.  
  3861.           for (const elm of document.getElementsByTagName(tag)) {
  3862.             if ((elm || elm.inst).isAttached === true) {
  3863.               fpTicker(elm);
  3864.             }
  3865.           }
  3866.  
  3867.  
  3868.           let rafHackState = 0;
  3869.  
  3870.           let isTimingFunctionHackable = false;
  3871.  
  3872.           let urt = 0;
  3873.  
  3874.           if (typeof cProto.startCountdown === 'function' && typeof cProto.updateTimeout === 'function' && typeof cProto.isAnimationPausedChanged === 'function') {
  3875.  
  3876.             // console.log('startCountdown', typeof cProto.startCountdown)
  3877.             // console.log('updateTimeout', typeof cProto.updateTimeout)
  3878.             // console.log('isAnimationPausedChanged', typeof cProto.isAnimationPausedChanged)
  3879.  
  3880.             isTimingFunctionHackable = fnIntegrity(cProto.startCountdown, '2.66.37') && fnIntegrity(cProto.updateTimeout, '1.76.45') && fnIntegrity(cProto.isAnimationPausedChanged, '2.56.30')
  3881.  
  3882.           } else {
  3883.             console.log(`Skip Timing Function Modification for ${tag}`);
  3884.             continue;
  3885.           }
  3886.  
  3887.  
  3888.           if (ENABLE_RAF_HACK_TICKERS && rafHub !== null) {
  3889.  
  3890.             // cancelable - this.rafId < isAnimationPausedChanged >
  3891.             rafHackState = 1;
  3892.  
  3893.             if (isTimingFunctionHackable) {
  3894.               rafHackState = 2;
  3895.  
  3896.             } else {
  3897.               rafHackState = 4;
  3898.             }
  3899.  
  3900.           }
  3901.  
  3902.           const isCSSPropertySupported = () => {
  3903.  
  3904.             if (typeof CSS !== 'object' || typeof (CSS || 0).registerProperty !== 'function') return;
  3905.             const documentElement = document.documentElement;
  3906.             if (!documentElement) {
  3907.               console.warn('document.documentElement is not found');
  3908.               return false;
  3909.             }
  3910.             if (`${window.getComputedStyle(documentElement).getPropertyValue('--ticker-rtime')}`.length === 0) {
  3911.               return false;
  3912.             }
  3913.             return true;
  3914.  
  3915.           };
  3916.  
  3917.           const doAnimator = !!ATTEMPT_ANIMATED_TICKER_BACKGROUND && isTimingFunctionHackable && typeof KeyframeEffect === 'function' && typeof animate === 'function' && typeof cProto.computeContainerStyle === 'function' && typeof cProto.colorFromDecimal === 'function' && isCSSPropertySupported();
  3918.  
  3919.           const doRAFHack = rafHackState === 2;
  3920.  
  3921.           cProto._throwOut = function () {
  3922.             this._r782 = 1;
  3923.             Promise.resolve().then(() => {
  3924.               this.detached();
  3925.               this.data = null;
  3926.               this.countdownMs = 0;
  3927.               this.lastCountdownTimeMs = null;
  3928.               if (this.__dataClientsReady === true) this.__dataClientsReady = false;
  3929.               if (this.__dataEnabled === true) this.__dataEnabled = false;
  3930.               if (this.__dataReady === true) this.__dataReady = false;
  3931.               const hm = this.hostElement || this;
  3932.               if (hm.parentNode) hm.remove();
  3933.               if (hm.firstChild) hm.textContent = '';
  3934.             }).catch(e => {
  3935.               console.warn(e);
  3936.             });
  3937.           };
  3938.  
  3939.           // cProto._checkTickerBackgroundChanged = doAnimator ? function () {
  3940.           //   if (runTickerClassName === 'run-ticker') {
  3941.           //     const container = (this.$ || 0).container || 0;
  3942.           //     if (!container) return;
  3943.           //     container.classList.add('run-ticker-test');
  3944.           //     const evaluated = `${window.getComputedStyle(container).background}`;
  3945.           //     container.classList.remove('run-ticker-test');
  3946.           //     if (evaluated.indexOf('0.') < 4) {
  3947.           //       // not fulfilling
  3948.           //       // rgba(0, 0, 0, 0.004) none repeat scroll 0% 0% / auto padding-box border-box
  3949.           //       runTickerClassName = 'run-ticker-forced';
  3950.           //       console.groupCollapsed(`%c${"YouTube Super Fast Chat"}%c${" | Incompatibility Found"}`,
  3951.           //         "background-color: #010502; color: #fe806a; font-weight: 700; padding: 2px;",
  3952.           //         "background-color: #010502; color: #fe806a; font-weight: 300; padding: 2px;"
  3953.           //       );
  3954.           //       console.warn(`%cWarning:\n\tYou might have added a userscript or extension that hacks ticker background too.\n\tYouTube Super Fast Chat will override it for you.`, 'color: #bada55');
  3955.           //       console.groupEnd();
  3956.           //     }
  3957.           //   }
  3958.           // } : null;
  3959.  
  3960.           cProto._makeAnimator = doAnimator ? function () {
  3961.             if (this._r782) return;
  3962.             // if (!this.isAttached) return;
  3963.             if (!this._runnerAE) {
  3964.               const aElement = (this.$ || 0).container;
  3965.               if (!aElement) return console.warn("this.$.container is undefined");
  3966.               const da = this.data;
  3967.               if (!da || !da.startBackgroundColor || !da.endBackgroundColor) return console.warn("this.data is undefined or incorrect");
  3968.               const c1 = this.colorFromDecimal(da.startBackgroundColor);
  3969.               const c2 = this.colorFromDecimal(da.endBackgroundColor);
  3970.               if (typeof c1 !== 'string' || typeof c2 !== 'string') return console.warn('c1, c2 is not a string');
  3971.  
  3972.               // if (!this.__tickerBackgroundInitialChecked__) {
  3973.               //   this.constructor.prototype.__tickerBackgroundInitialChecked__ = true;
  3974.               //   console.log('__tickerBackgroundInitialChecked__')
  3975.               //   this._checkTickerBackgroundChanged();
  3976.               // }
  3977.  
  3978.               aElement.style.setProperty('--ticker-c1', c1);
  3979.               aElement.style.setProperty('--ticker-c2', c2);
  3980.               aElement.classList.add(runTickerClassName);
  3981.               const p = (this.countdownMs / this.countdownDurationMs) * 100;
  3982.               // this._aeStartV = this.countdownMs;
  3983.               // this._aeStartT = this.countdownDurationMs;
  3984.               if (!(p >= 0 && p <= 100)) {
  3985.                 console.warn('incorrect time ratio', p);
  3986.               } else {
  3987.                 /*
  3988.                 const u0 = p.toFixed(4) + '%';
  3989.                 this._runnerAE = animate.call(aElement,
  3990.                   [
  3991.                     { '--ticker-rtime': u0 },
  3992.                     { '--ticker-rtime': '0%' }
  3993.                   ]
  3994.                   ,
  3995.                   {
  3996.                     fill: "forwards",
  3997.                     duration: this.countdownMs,
  3998.                     easing: "linear"
  3999.                   }
  4000.                 );
  4001.                 */
  4002.  
  4003.                 let timingFn = 'linear';
  4004.  
  4005.                 const totalDuration = this.countdownDurationMs;
  4006.  
  4007.                 if (ATTEMPT_ANIMATED_TICKER_BACKGROUND === 'steps') {
  4008.  
  4009.                   // @ step timing [min. 0.2%]
  4010.                   let stepInterval = 0.2; // unit: %
  4011.                   if (totalDuration > 400000) stepInterval = 0.2;
  4012.                   else if (totalDuration > 200000) stepInterval = 0.5;
  4013.                   else if (totalDuration > 100000) stepInterval = 1;
  4014.                   else if (totalDuration > 50000) stepInterval = 2;
  4015.                   else if (totalDuration > 25000) stepInterval = 5;
  4016.                   else stepInterval = 5;
  4017.  
  4018.                   let numOfSteps = Math.round(100 / stepInterval);
  4019.  
  4020.                   if (numOfSteps > TICKER_MAX_STEPS_LIMIT) numOfSteps = TICKER_MAX_STEPS_LIMIT;
  4021.                   if (numOfSteps < 5) numOfSteps = 5;
  4022.  
  4023.                   timingFn = `steps(${numOfSteps}, end)`;
  4024.  
  4025.                 }
  4026.  
  4027.  
  4028.  
  4029.                 this._runnerAE = animate.call(aElement,
  4030.                   [
  4031.                     { '--ticker-rtime': '100%' },
  4032.                     { '--ticker-rtime': '0%' }
  4033.                   ]
  4034.                   ,
  4035.                   {
  4036.                     fill: "forwards",
  4037.                     duration: totalDuration,
  4038.                     easing: timingFn
  4039.                   }
  4040.                 );
  4041.  
  4042.                 this._runnerAE.onfinish = () => {
  4043.                   if (this.isAttached === true && !this._r782 && ((this.$ || 0).container || 0).isConnected === true) {
  4044.                     this._aeFinished();
  4045.                   }
  4046.                 }
  4047.  
  4048.                 let bq = (1.0 - (this.countdownMs / totalDuration)) * totalDuration;
  4049.                 if (bq >= 0 && bq <= totalDuration) {
  4050.  
  4051.                   this._runnerAE.currentTime = bq
  4052.                 } else {
  4053.                   console.warn('Error on setting _runnerAE.currentTime!');
  4054.                 }
  4055.  
  4056.  
  4057.                 aeConstructor = this._runnerAE.constructor; // constructor is from iframe
  4058.                 return this._runnerAE;
  4059.               }
  4060.             } else {
  4061.               if (!aeConstructor) return console.warn('aeConstructor is undefined');
  4062.               // assume just time update
  4063.               const ae = this._runnerAE;
  4064.               if (!(ae instanceof aeConstructor)) return console.warn('this._runnerAE is not Animation');
  4065.               if (ae.playState !== 'paused') console.warn('ae.playState !== paused');
  4066.               let p = (this.countdownMs / this.countdownDurationMs) * 100;
  4067.               if (!(p >= 0 && p <= 100)) {
  4068.                 console.warn('incorrect time ratio', p);
  4069.               } else {
  4070.                 // let u0 = p.toFixed(4) + '%'
  4071.                 /*
  4072.                 ae.effect.setKeyframes([
  4073.                   { '--ticker-rtime': u0 },
  4074.                   { '--ticker-rtime': '0%' }
  4075.                 ]);
  4076.                 ae.effect.updateTiming({ duration: this.countdownMs });
  4077.                 */
  4078.                 // ae.currentTime = 0;
  4079.  
  4080.  
  4081.  
  4082.                 let bq = (1.0 - (this.countdownMs / this.countdownDurationMs)) * this.countdownDurationMs;
  4083.                 if (bq >= 0 && bq <= this.countdownDurationMs) {
  4084.  
  4085.                   this._runnerAE.currentTime = bq
  4086.                 } else {
  4087.                   console.warn('Error on setting _runnerAE.currentTime!');
  4088.                 }
  4089.  
  4090.  
  4091.                 ae.play();
  4092.                 return ae;
  4093.               }
  4094.             }
  4095.           } : null;
  4096.  
  4097.           cProto._aeFinished = doAnimator ? function () {
  4098.  
  4099.             if (this._r782) return;
  4100.  
  4101.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4102.               this._throwOut();
  4103.               return;
  4104.             }
  4105.  
  4106.             if (doAnimator) {
  4107.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4108.  
  4109.               let lc = window.performance.now();
  4110.               this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4111.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4112.               this.lastCountdownTimeMs = lc;
  4113.               if (this.countdownMs > 10) console.warn('Warning: this.countdownMs is not zero when finished!', this.countdownMs); // just warning.
  4114.  
  4115.               this.countdownMs = 0;
  4116.               this.lastCountdownTimeMs = null;
  4117.  
  4118.               if (this.isAttached) {
  4119.                 if (Date.now() - windowShownAt < 80) {
  4120.                   // no animation if the video page is switched from background to foreground
  4121.                   this.hostElement.style.display = 'none';
  4122.                 } else {
  4123.                   "auto" === this.hostElement.style.width && this.setContainerWidth();
  4124.                   this.slideDown();
  4125.                 }
  4126.               }
  4127.  
  4128.  
  4129.             } else {
  4130.               console.warn('unexpected issue')
  4131.             }
  4132.           } : null;
  4133.  
  4134.  
  4135.           if (ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX) {
  4136.  
  4137.             if (typeof cProto.handlePauseReplay === 'function' && !cProto.handlePauseReplay66 && cProto.handlePauseReplay.length === 0) {
  4138.               urt++;
  4139.               assertor(() => fnIntegrity(cProto.handlePauseReplay, '0.12.4'));
  4140.               cProto.handlePauseReplay66 = cProto.handlePauseReplay;
  4141.               cProto.handlePauseReplay = function () {
  4142.                 if (this.isAttached) {
  4143.  
  4144.                   if (pairForPauseResumeM === 0) {
  4145.                     pairForPauseResume++;
  4146.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4147.                   }
  4148.                   // console.log('handlePauseReplay');
  4149.                   // console.log('handlePauseReplay', pairForPauseResume);
  4150.                   const r = this.handlePauseReplay66.apply(this, arguments);
  4151.                   isMainVideoOngoing = false;
  4152.                   return r;
  4153.                 }
  4154.               };
  4155.             } else {
  4156.               console.log('Error for setting cProto.handlePauseReplay', tag)
  4157.             }
  4158.  
  4159.             if (typeof cProto.handleResumeReplay === 'function' && !cProto.handleResumeReplay66 && cProto.handlePauseReplay.length === 0) {
  4160.               urt++;
  4161.               assertor(() => fnIntegrity(cProto.handleResumeReplay, '0.8.2'));
  4162.               cProto.handleResumeReplay66 = cProto.handleResumeReplay;
  4163.               cProto.handleResumeReplay = function () {
  4164.                 if (this.isAttached) {
  4165.  
  4166.                   if (pairForPauseResumeM === 0) {
  4167.                     pairForPauseResume++;
  4168.                     if (pairForPauseResume > 1e9) pairForPauseResume = pairForPauseResume % 1e4;
  4169.                   }
  4170.                   // console.log('handleResumeReplay');
  4171.                   // console.log('handleResumeReplay', pairForPauseResume);
  4172.                   const r = this.handleResumeReplay66.apply(this, arguments);
  4173.                   isMainVideoOngoing = true;
  4174.                   return r;
  4175.  
  4176.                 }
  4177.               };
  4178.             } else {
  4179.               console.log('Error for setting cProto.handleResumeReplay', tag)
  4180.             }
  4181.  
  4182.             if (typeof cProto.handleReplayProgress === 'function' && !cProto.handleReplayProgress66 && cProto.handleReplayProgress.length === 1) {
  4183.               urt++;
  4184.               assertor(() => fnIntegrity(cProto.handleReplayProgress, '1.16.13'));
  4185.               cProto.handleReplayProgress66 = cProto.handleReplayProgress;
  4186.               cProto.handleReplayProgress = function (a) {
  4187.                 if (this.isAttached) {
  4188.                   const p = mainVideoLastProgress;
  4189.                   mainVideoLastProgress = a;
  4190.                   if (isMainVideoOngoing === false) { // ignore isMainVideoOngoing === null ?
  4191.                     const d = a - p;
  4192.                     if (d > 0 && d < 0.28) isMainVideoOngoing = true; // timeupdate
  4193.                     // 0.28 is due to
  4194.                     //    - most browsers will fire the timeupdate event between 4 to 60 times per second
  4195.                     //    - i.e. timeupdate roughly every 15-250 milliseconds
  4196.                   }
  4197.                   let promiseResult = null;
  4198.                   if (this.isAnimationPaused) {
  4199.                     // unstable state for isMainVideoOngoing; delay required
  4200.                     // all the tickers' handleReplayProgress are executed in the same microtask
  4201.                     // execute after result returned
  4202.                     const lz1 = pairForPauseResume;
  4203.                     Promise.resolve().then(() => {
  4204.                       return promiseResult
  4205.                     }).then(() => {
  4206.  
  4207.  
  4208.                       if (isMainVideoOngoing === true && this.isAnimationPaused) {
  4209.                         const lz2 = pairForPauseResume;
  4210.                         // console.log( 10044000, lz1, lz2 , mainVideoLastProgress - a, isMainVideoOngoing  )
  4211.                         if (lz1 === lz2 && mainVideoLastProgress !== null && mainVideoLastProgress - a >= -1e-5) this.isAnimationPaused = false; // trigger isAnimationPausedChanged
  4212.                       }
  4213.  
  4214.                     });
  4215.                   }
  4216.  
  4217.                   const lq1 = pairForPauseResume;
  4218.                   promiseResult = Promise.resolve().then(() => {
  4219.                     const lq2 = pairForPauseResume;
  4220.  
  4221.                     if (lq1 === lq2) {
  4222.                       this.handleReplayProgress66(a);
  4223.                     }
  4224.  
  4225.  
  4226.                   })
  4227.  
  4228.                 }
  4229.               };
  4230.             } else {
  4231.               console.log('Error for setting cProto.handleReplayProgress', tag)
  4232.             }
  4233.  
  4234.           }
  4235.  
  4236.           const ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED = ENABLE_VIDEO_PLAYBACK_PROGRESS_STATE_FIX && urt === 3;
  4237.  
  4238.           const doTimerFnModification = (doRAFHack || doAnimator);
  4239.  
  4240.           let windowShownAt = 0;
  4241.           if (doTimerFnModification) {
  4242.  
  4243.             window.addEventListener('visibilitychange', () => {
  4244.               if (document.visibilityState === 'visible') windowShownAt = Date.now();
  4245.               else windowShownAt = 0;
  4246.             }, false);
  4247.  
  4248.           }
  4249.  
  4250.           cProto.startCountdown = doTimerFnModification ? function (a, b) { // .startCountdown(a.durationSec, a.fullDurationSec)
  4251.  
  4252.             // a.durationSec [s] => countdownMs [ms]
  4253.             // a.fullDurationSec [s] => countdownDurationMs [ms] OR countdownMs [ms]
  4254.             // lastCountdownTimeMs => raf ongoing
  4255.             // lastCountdownTimeMs = 0 when rafId = 0 OR countdownDurationMs = 0
  4256.  
  4257.             if (this._r782) return;
  4258.  
  4259.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4260.               this._throwOut();
  4261.               return;
  4262.             }
  4263.  
  4264.             if (doAnimator) {
  4265.               b = void 0 === b ? 0 : b;
  4266.               if (void 0 !== a) {
  4267.                 this.countdownMs = 1E3 * a; // decreasing from durationSec[s] to zero
  4268.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs; // constant throughout the animation
  4269.                 if (!(this.lastCountdownTimeMs || this.isAnimationPaused)) {
  4270.                   this.lastCountdownTimeMs = performance.now()
  4271.                   this.rafId = 1
  4272.                   if (this._runnerAE) console.warn('Error in .startCountdown; this._runnerAE already created.')
  4273.                   this.detlaSincePausedSecs = 0;
  4274.                   const ae = this._makeAnimator();
  4275.                   if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4276.  
  4277.                   // console.log(539, isMainVideoOngoing)
  4278.                   if (this.isAnimationPaused === void 0 && ENABLE_VIDEO_PROGRESS_STATE_FIX_AND_URT_PASSED && isMainVideoOngoing === false && mainVideoLastProgress !== null) {
  4279.                     // << This is mainly for [PlayBack Replay] backwards >>
  4280.                     // fix the case when the main video is paused but due to seeking the tickers are added
  4281.                     // play first then pause immediately to allow the visual effect of initial state
  4282.                     // don't forget to set the "playerProgressSec"
  4283.                     // otherwise when it resumes from paused state, the detlaSincePausedSecs will be huge
  4284.                     this.playerProgressSec = mainVideoLastProgress; // save the progress first
  4285.                     this.isAnimationPaused = true; // trigger isAnimationPausedChanged
  4286.                     this.detlaSincePausedSecs = 0;
  4287.                     this._forceNoDetlaSincePausedSecs783 = 1; // reset this.detlaSincePausedSecs = 0 when resumed
  4288.                   }
  4289.                 }
  4290.               }
  4291.             } else {
  4292.               // console.log('cProto.startCountdown', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4293.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4294.               b = void 0 === b ? 0 : b;
  4295.               void 0 !== a && (this.countdownMs = 1E3 * a,
  4296.                 this.countdownDurationMs = b ? 1E3 * b : this.countdownMs,
  4297.                 this.ratio = 1,
  4298.                 this.lastCountdownTimeMs || this.isAnimationPaused || (this.lastCountdownTimeMs = performance.now(),
  4299.                   this.rafId = rafHub.request(this.boundUpdateTimeout37_)))
  4300.             }
  4301.  
  4302.           } : cProto.startCountdown;
  4303.  
  4304.           cProto.updateTimeout = doTimerFnModification ? function (a) {
  4305.  
  4306.             if (this._r782) return;
  4307.  
  4308.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4309.               this._throwOut();
  4310.               return;
  4311.             }
  4312.  
  4313.             if (doAnimator) {
  4314.               if (!this._runnerAE) console.warn('Error in .updateTimeout; this._runnerAE is undefined');
  4315.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4316.               if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4317.               if (this.isAttached && this.countdownMs) {
  4318.                 this.lastCountdownTimeMs = a
  4319.                 const ae = this._makeAnimator(); // request raf
  4320.                 if (!ae) console.warn('Error in startCountdown._makeAnimator()');
  4321.               } else {
  4322.                 (this.lastCountdownTimeMs = null,
  4323.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4324.                     this.slideDown()));
  4325.               }
  4326.             } else {
  4327.               // console.log('cProto.updateTimeout', tag) // yt-live-chat-ticker-sponsor-item-renderer
  4328.               if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4329.               this.countdownMs = Math.max(0, this.countdownMs - (a - (this.lastCountdownTimeMs || 0)));
  4330.               this.ratio = this.countdownMs / this.countdownDurationMs;
  4331.               this.isAttached && this.countdownMs ? (this.lastCountdownTimeMs = a,
  4332.                 this.rafId = rafHub.request(this.boundUpdateTimeout37_)) : (this.lastCountdownTimeMs = null,
  4333.                   this.isAttached && ("auto" === this.hostElement.style.width && this.setContainerWidth(),
  4334.                     this.slideDown()))
  4335.             }
  4336.  
  4337.           } : cProto.updateTimeout;
  4338.  
  4339.           // let ez = 0;
  4340.           cProto.isAnimationPausedChanged = doTimerFnModification ? function (a, b) {
  4341.  
  4342.             if (this._r782) return;
  4343.  
  4344.             if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4345.               this._throwOut();
  4346.               return;
  4347.             }
  4348.             let forceNoDetlaSincePausedSecs783 = this._forceNoDetlaSincePausedSecs783;
  4349.             this._forceNoDetlaSincePausedSecs783 = 0;
  4350.  
  4351.             Promise.resolve().then(() => {
  4352.  
  4353.               if (doAnimator) {
  4354.  
  4355.                 const playState = (this._runnerAE || 0).playState;
  4356.                 if (a && playState === 'running') {
  4357.  
  4358.                 } else if (!a && playState !== 'running' && b) {
  4359.  
  4360.                 } else {
  4361.                   return;
  4362.                 }
  4363.               }
  4364.  
  4365.               // if (Math.abs(this.detlaSincePausedSecs) < 0.01) this.detlaSincePausedSecs = 0;
  4366.               if (doAnimator) {
  4367.                 const pu = () => { // running -> pause
  4368.                   this._runnerAE.pause()
  4369.                   let lc = window.performance.now();
  4370.                   this.countdownMs = Math.max(0, this.countdownMs - (lc - this.lastCountdownTimeMs));
  4371.                   if (this.countdownMs > this.countdownDurationMs) this.countdownMs = this.countdownDurationMs;
  4372.                   this.lastCountdownTimeMs = lc;
  4373.                 };
  4374.                 const wa = () => { // pause -> running
  4375.                   if (forceNoDetlaSincePausedSecs783) this.detlaSincePausedSecs = 0;
  4376.                   a = this.detlaSincePausedSecs ? (this.lastCountdownTimeMs || 0) + 1000 * this.detlaSincePausedSecs : (this.lastCountdownTimeMs || 0);
  4377.                   this.detlaSincePausedSecs = 0;
  4378.                   this.updateTimeout(a);
  4379.                   this.lastCountdownTimeMs = window.performance.now();
  4380.                 };
  4381.                 a ? (this._runnerAE && pu()) : (!a && b && wa());
  4382.               } else {
  4383.                 // ez++;
  4384.                 // if(ez> 1e9) ez=9;
  4385.                 if (!this.boundUpdateTimeout37_) this.boundUpdateTimeout37_ = this.updateTimeout.bind(this);
  4386.                 a ? rafHub.cancel(this.rafId) : !a && b && (a = this.lastCountdownTimeMs || 0,
  4387.                   this.detlaSincePausedSecs && (a = (this.lastCountdownTimeMs || 0) + 1E3 * this.detlaSincePausedSecs,
  4388.                     this.detlaSincePausedSecs = 0),
  4389.                   this.boundUpdateTimeout37_(a),
  4390.                   this.lastCountdownTimeMs = window.performance.now())
  4391.               }
  4392.  
  4393.             }).catch(e => {
  4394.               console.log(e);
  4395.             });
  4396.  
  4397.  
  4398.  
  4399.           } : cProto.isAnimationPausedChanged;
  4400.  
  4401.  
  4402.           if (doAnimator) {
  4403.  
  4404.             assertor(() => fnIntegrity(cProto.computeContainerStyle, '2.81.31'));
  4405.  
  4406.             let dummyValueForStyleReturn = null;
  4407.  
  4408.             cProto.computeContainerStyle66 = cProto.computeContainerStyle;
  4409.             cProto.computeContainerStyle = function (a, b) {
  4410.  
  4411.               if (this._r782) return;
  4412.  
  4413.               if (this.isAttached === false && ((this.$ || 0).container || 0).isConnected === false) {
  4414.                 this._throwOut();
  4415.                 return;
  4416.               }
  4417.  
  4418.               const fullDurationSec = a ? a.fullDurationSec : 0;
  4419.               if (fullDurationSec > 0 && typeof b === 'number') {
  4420.  
  4421.                 // usually zero
  4422.  
  4423.                 // let currentDuationSrc = b * fullDurationSec; // a.durationSec
  4424.  
  4425.                 // console.log(231, fullDurationSec, b, currentDuationSrc, a.durationSec);
  4426.  
  4427.                 /*
  4428.                 if (a.mdsz && typeof a.mdst) return a.mdst;
  4429.                 a.mdsz = 1;
  4430.  
  4431.  
  4432.  
  4433.                 let c1 = this.colorFromDecimal(a.startBackgroundColor);
  4434.                 let c2 = this.colorFromDecimal(a.endBackgroundColor);
  4435.  
  4436.                 let ratio = currentDuationSrc / fullDurationSec;
  4437.  
  4438.                 let m = (ratio * 100).toFixed(1);
  4439.  
  4440.  
  4441.                 let s = `--background:linear-gradient(90deg, ${c1},${c1} ${m}%,${c2} ${m}%,${c2});`
  4442.                 let ro = {
  4443.                   "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4444.                   "implementsGoogStringTypedString": true
  4445.                 };
  4446.  
  4447.                 ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4448.  
  4449.                 a.mdst = s;
  4450.  
  4451.                 return ro;
  4452.                 */
  4453.               }
  4454.  
  4455.  
  4456.  
  4457.               // return this.computeContainerStyle66.apply(this, arguments);
  4458.  
  4459.               if (dummyValueForStyleReturn === null) {
  4460.  
  4461.                 let s = `--nx:82;`
  4462.                 let ro = {
  4463.                   "privateDoNotAccessOrElseSafeStyleWrappedValue_": s,
  4464.                   "implementsGoogStringTypedString": true
  4465.                 };
  4466.  
  4467.                 ro.getTypedStringValue = ro.toString = function () { return this.privateDoNotAccessOrElseSafeStyleWrappedValue_ };
  4468.  
  4469.  
  4470.                 dummyValueForStyleReturn = ro;
  4471.  
  4472.  
  4473.               }
  4474.  
  4475.  
  4476.               return dummyValueForStyleReturn;
  4477.  
  4478.  
  4479.             }
  4480.  
  4481.           }
  4482.  
  4483.           if (doTimerFnModification === true) hasTimerModified = true;
  4484.  
  4485.           if (!!ATTEMPT_ANIMATED_TICKER_BACKGROUND) {
  4486.             console.log('ATTEMPT_ANIMATED_TICKER_BACKGROUND', tag, doAnimator ? 'OK' : 'NG');
  4487.           }
  4488.  
  4489.           if (!doAnimator && (rafHackState === 2 || rafHackState === 4)) {
  4490.             console.log('RAF_HACK_TICKERS', tag, doRAFHack ? "OK" : "NG");
  4491.           }
  4492.  
  4493.         }
  4494.         console.log("[End]");
  4495.         console.groupEnd();
  4496.  
  4497.  
  4498.       }).catch(console.warn);
  4499.  
  4500.       customElements.whenDefined('yt-live-chat-ticker-renderer').then(() => {
  4501.  
  4502.         mightFirstCheckOnYtInit();
  4503.         groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-ticker-renderer hacks");
  4504.         console.log("[Begin]");
  4505.         (() => {
  4506.  
  4507.           const tag = "yt-live-chat-ticker-renderer"
  4508.           const dummy = document.createElement(tag);
  4509.  
  4510.           const cProto = getProto(dummy);
  4511.           if (!cProto || !cProto.attached) {
  4512.             console.warn(`proto.attached for ${tag} is unavailable.`);
  4513.             return;
  4514.           }
  4515.  
  4516.           if (RAF_FIX_keepScrollClamped) {
  4517.  
  4518.             // to be improved
  4519.  
  4520.             if (typeof cProto.keepScrollClamped === 'function' && !cProto.keepScrollClamped72 && fnIntegrity(cProto.keepScrollClamped) === '0.17.10') {
  4521.  
  4522.               cProto.keepScrollClamped72 = cProto.keepScrollClamped;
  4523.               cProto.keepScrollClamped = function () {
  4524.                 this._bound_keepScrollClamped = this._bound_keepScrollClamped || this.keepScrollClamped.bind(this);
  4525.                 this.scrollClampRaf = requestAnimationFrame(this._bound_keepScrollClamped);
  4526.                 this.maybeClampScroll()
  4527.               }
  4528.  
  4529.               console.log('RAF_FIX: keepScrollClamped', tag, "OK")
  4530.             } else {
  4531.  
  4532.               assertor(() => fnIntegrity(cProto.keepScrollClamped, '0.17.10'));
  4533.               console.log('RAF_FIX: keepScrollClamped', tag, "NG")
  4534.             }
  4535.  
  4536.           }
  4537.  
  4538.  
  4539.           if (RAF_FIX_scrollIncrementally && typeof cProto.startScrolling === 'function' && typeof cProto.scrollIncrementally === 'function' && fnIntegrity(cProto.startScrolling) === '1.44.32' && fnIntegrity(cProto.scrollIncrementally) === '1.82.43') {
  4540.             // to be replaced by animator
  4541.  
  4542.             cProto.startScrolling = function (a) {
  4543.               this.scrollStopHandle && this.cancelAsync(this.scrollStopHandle);
  4544.               this.asyncHandle && cancelAnimationFrame(this.asyncHandle);
  4545.               this.lastFrameTimestamp = this.scrollStartTime = performance.now();
  4546.               this.scrollRatePixelsPerSecond = a;
  4547.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4548.               this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally)
  4549.             };
  4550.  
  4551.             cProto.scrollIncrementally = function (a) {
  4552.               var b = a - (this.lastFrameTimestamp || 0);
  4553.               this.$.items.scrollLeft += b / 1E3 * (this.scrollRatePixelsPerSecond || 0);
  4554.               this.maybeClampScroll();
  4555.               this.updateArrows();
  4556.               this.lastFrameTimestamp = a;
  4557.               this._bound_scrollIncrementally = this._bound_scrollIncrementally || this.scrollIncrementally.bind(this);
  4558.               0 < this.$.items.scrollLeft || this.scrollRatePixelsPerSecond && 0 < this.scrollRatePixelsPerSecond ? this.asyncHandle = requestAnimationFrame(this._bound_scrollIncrementally) : this.stopScrolling()
  4559.             };
  4560.  
  4561.             console.log('RAF_FIX: scrollIncrementally', tag, "OK")
  4562.           } else {
  4563.             assertor(() => fnIntegrity(cProto.startScrolling, '1.44.32'));
  4564.             assertor(() => fnIntegrity(cProto.scrollIncrementally, '1.82.43'));
  4565.             console.log('RAF_FIX: scrollIncrementally', tag, "NG")
  4566.           }
  4567.  
  4568.  
  4569.         })();
  4570.  
  4571.         console.log("[End]");
  4572.  
  4573.         console.groupEnd();
  4574.  
  4575.       }).catch(console.warn);
  4576.  
  4577.  
  4578.       if (ENABLE_RAF_HACK_INPUT_RENDERER && rafHub !== null) {
  4579.  
  4580.  
  4581.         customElements.whenDefined("yt-live-chat-message-input-renderer").then(() => {
  4582.  
  4583.           mightFirstCheckOnYtInit();
  4584.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-message-input-renderer hacks");
  4585.           console.log("[Begin]");
  4586.           (() => {
  4587.  
  4588.             const tag = "yt-live-chat-message-input-renderer"
  4589.             const dummy = document.createElement(tag);
  4590.  
  4591.             const cProto = getProto(dummy);
  4592.             if (!cProto || !cProto.attached) {
  4593.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4594.               return;
  4595.             }
  4596.  
  4597.             let doHack = false;
  4598.             if (typeof cProto.handleTimeout === 'function' && typeof cProto.updateTimeout === 'function') {
  4599.  
  4600.               // not cancellable
  4601.  
  4602.  
  4603.               doHack = fnIntegrity(cProto.handleTimeout, '1.27.16') && fnIntegrity(cProto.updateTimeout, '1.50.33');
  4604.  
  4605.             }
  4606.  
  4607.             if (doHack) {
  4608.  
  4609.               cProto.handleTimeout = function (a) {
  4610.                 console.log('cProto.handleTimeout', tag)
  4611.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4612.                 this.timeoutDurationMs = this.timeoutMs = a;
  4613.                 this.countdownRatio = 1;
  4614.                 0 === this.lastTimeoutTimeMs && rafHub.request(this.boundUpdateTimeout38_)
  4615.               };
  4616.               cProto.updateTimeout = function (a) {
  4617.                 console.log('cProto.updateTimeout', tag)
  4618.                 if (!this.boundUpdateTimeout38_) this.boundUpdateTimeout38_ = this.updateTimeout.bind(this);
  4619.                 this.lastTimeoutTimeMs && (this.timeoutMs = Math.max(0, this.timeoutMs - (a - this.lastTimeoutTimeMs)),
  4620.                   this.countdownRatio = this.timeoutMs / this.timeoutDurationMs);
  4621.                 this.isAttached && this.timeoutMs ? (this.lastTimeoutTimeMs = a,
  4622.                   rafHub.request(this.boundUpdateTimeout38_)) : this.lastTimeoutTimeMs = 0
  4623.               };
  4624.  
  4625.               console.log('RAF_HACK_INPUT_RENDERER', tag, "OK")
  4626.             } else {
  4627.  
  4628.               console.log('typeof handleTimeout', typeof cProto.handleTimeout)
  4629.               console.log('typeof updateTimeout', typeof cProto.updateTimeout)
  4630.  
  4631.               console.log('RAF_HACK_INPUT_RENDERER', tag, "NG")
  4632.             }
  4633.  
  4634.           })();
  4635.  
  4636.           console.log("[End]");
  4637.  
  4638.           console.groupEnd();
  4639.  
  4640.  
  4641.         })
  4642.  
  4643.  
  4644.       }
  4645.  
  4646.       if (ENABLE_RAF_HACK_EMOJI_PICKER && rafHub !== null) {
  4647.  
  4648.  
  4649.         customElements.whenDefined("yt-emoji-picker-renderer").then(() => {
  4650.  
  4651.           mightFirstCheckOnYtInit();
  4652.           groupCollapsed("YouTube Super Fast Chat", " | yt-emoji-picker-renderer hacks");
  4653.           console.log("[Begin]");
  4654.           (() => {
  4655.  
  4656.             const tag = "yt-emoji-picker-renderer"
  4657.             const dummy = document.createElement(tag);
  4658.  
  4659.             const cProto = getProto(dummy);
  4660.             if (!cProto || !cProto.attached) {
  4661.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4662.               return;
  4663.             }
  4664.  
  4665.             let doHack = false;
  4666.             if (typeof cProto.animateScroll_ === 'function') {
  4667.  
  4668.               // not cancellable
  4669.               console.log('animateScroll_', typeof cProto.animateScroll_)
  4670.  
  4671.               doHack = fnIntegrity(cProto.animateScroll_, '1.102.49')
  4672.  
  4673.             }
  4674.  
  4675.             if (doHack) {
  4676.  
  4677.               const querySelector = HTMLElement.prototype.querySelector;
  4678.               const U = (element) => ({
  4679.                 querySelector: (selector) => querySelector.call(element, selector)
  4680.               });
  4681.  
  4682.               cProto.animateScroll_ = function (a) {
  4683.                 // console.log('cProto.animateScroll_', tag) // yt-emoji-picker-renderer
  4684.                 if (!this.boundAnimateScroll39_) this.boundAnimateScroll39_ = this.animateScroll_.bind(this);
  4685.                 this.lastAnimationTime_ || (this.lastAnimationTime_ = a);
  4686.                 a -= this.lastAnimationTime_;
  4687.                 200 > a ? (U(this.hostElement).querySelector("#categories").scrollTop = this.animationStart_ + (this.animationEnd_ - this.animationStart_) * a / 200,
  4688.                   rafHub.request(this.boundAnimateScroll39_)) : (null != this.animationEnd_ && (U(this.hostElement).querySelector("#categories").scrollTop = this.animationEnd_),
  4689.                     this.animationEnd_ = this.animationStart_ = null,
  4690.                     this.lastAnimationTime_ = 0);
  4691.                 this.updateButtons_()
  4692.               }
  4693.  
  4694.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "OK")
  4695.             } else {
  4696.  
  4697.               console.log('ENABLE_RAF_HACK_EMOJI_PICKER', tag, "NG")
  4698.             }
  4699.  
  4700.           })();
  4701.  
  4702.           console.log("[End]");
  4703.  
  4704.           console.groupEnd();
  4705.         });
  4706.       }
  4707.  
  4708.       if (ENABLE_RAF_HACK_DOCKED_MESSAGE && rafHub !== null) {
  4709.  
  4710.  
  4711.         customElements.whenDefined("yt-live-chat-docked-message").then(() => {
  4712.  
  4713.           mightFirstCheckOnYtInit();
  4714.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-docked-message hacks");
  4715.           console.log("[Begin]");
  4716.           (() => {
  4717.  
  4718.             const tag = "yt-live-chat-docked-message"
  4719.             const dummy = document.createElement(tag);
  4720.  
  4721.             const cProto = getProto(dummy);
  4722.             if (!cProto || !cProto.attached) {
  4723.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4724.               return;
  4725.             }
  4726.  
  4727.             let doHack = false;
  4728.             if (typeof cProto.detached === 'function' && typeof cProto.checkIntersections === 'function' && typeof cProto.onDockableMessagesChanged === 'function' && typeof cProto.boundCheckIntersections === 'undefined') {
  4729.  
  4730.               // cancelable - this.intersectRAF <detached>
  4731.               // yt-live-chat-docked-message
  4732.               // boundCheckIntersections <-> checkIntersections
  4733.               // onDockableMessagesChanged
  4734.               //  this.intersectRAF = window.requestAnimationFrame(this.boundCheckIntersections);
  4735.  
  4736.               console.log('detached', typeof cProto.detached)
  4737.               console.log('checkIntersections', typeof cProto.checkIntersections)
  4738.               console.log('onDockableMessagesChanged', typeof cProto.onDockableMessagesChanged)
  4739.  
  4740.               doHack = fnIntegrity(cProto.detached, '0.32.22') && fnIntegrity(cProto.checkIntersections, '0.128.85') && fnIntegrity(cProto.onDockableMessagesChanged, '0.20.11')
  4741.  
  4742.             }
  4743.  
  4744.             if (doHack) {
  4745.  
  4746.               cProto.checkIntersections = function () {
  4747.                 // console.log('cProto.checkIntersections', tag)
  4748.                 if (this.dockableMessages.length) {
  4749.                   this.intersectRAF = rafHub.request(this.boundCheckIntersections);
  4750.                   let a = this.dockableMessages[0]
  4751.                     , b = this.hostElement.getBoundingClientRect();
  4752.                   a = a.getBoundingClientRect();
  4753.                   let c = a.top - b.top
  4754.                     , d = 8 >= c;
  4755.                   c = 8 >= c - this.hostElement.clientHeight;
  4756.                   if (d) {
  4757.                     let e;
  4758.                     for (; d;) {
  4759.                       e = this.dockableMessages.shift();
  4760.                       d = this.dockableMessages[0];
  4761.                       if (!d)
  4762.                         break;
  4763.                       d = d.getBoundingClientRect();
  4764.                       c = d.top - b.top;
  4765.                       let f = 8 >= c;
  4766.                       if (8 >= c - a.height)
  4767.                         if (f)
  4768.                           a = d;
  4769.                         else
  4770.                           return;
  4771.                       d = f
  4772.                     }
  4773.                     this.dock(e)
  4774.                   } else
  4775.                     c && this.dockedItem && this.clear()
  4776.                 } else
  4777.                   this.intersectRAF = 0
  4778.               }
  4779.  
  4780.               cProto.onDockableMessagesChanged = function () {
  4781.                 // console.log('cProto.onDockableMessagesChanged', tag) // yt-live-chat-docked-message
  4782.                 this.dockableMessages.length && !this.intersectRAF && (this.intersectRAF = rafHub.request(this.boundCheckIntersections))
  4783.               }
  4784.  
  4785.               cProto.detached = function () {
  4786.                 this.intersectRAF && rafHub.cancel(this.intersectRAF)
  4787.               }
  4788.  
  4789.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "OK")
  4790.             } else {
  4791.  
  4792.               console.log('ENABLE_RAF_HACK_DOCKED_MESSAGE', tag, "NG")
  4793.             }
  4794.  
  4795.           })();
  4796.  
  4797.           console.log("[End]");
  4798.  
  4799.           console.groupEnd();
  4800.  
  4801.         }).catch(console.warn);
  4802.  
  4803.       }
  4804.  
  4805.       if (FIX_SETSRC_AND_THUMBNAILCHANGE_) {
  4806.  
  4807.  
  4808.         customElements.whenDefined("yt-img-shadow").then(() => {
  4809.  
  4810.           mightFirstCheckOnYtInit();
  4811.           groupCollapsed("YouTube Super Fast Chat", " | yt-img-shadow hacks");
  4812.           console.log("[Begin]");
  4813.           (() => {
  4814.  
  4815.             const tag = "yt-img-shadow"
  4816.             const dummy = document.createElement(tag);
  4817.  
  4818.             const cProto = getProto(dummy);
  4819.             if (!cProto || !cProto.attached) {
  4820.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4821.               return;
  4822.             }
  4823.  
  4824.             if (typeof cProto.thumbnailChanged_ === 'function' && !cProto.thumbnailChanged66_) {
  4825.  
  4826.               cProto.thumbnailChanged66_ = cProto.thumbnailChanged_;
  4827.               cProto.thumbnailChanged_ = function (a) {
  4828.  
  4829.                 if (this.oldThumbnail_ && this.thumbnail && this.oldThumbnail_.thumbnails === this.thumbnail.thumbnails) return;
  4830.                 if (!this.oldThumbnail_ && !this.thumbnail) return;
  4831.  
  4832.                 return this.thumbnailChanged66_.apply(this, arguments)
  4833.  
  4834.               }
  4835.               console.log("cProto.thumbnailChanged_ - OK");
  4836.  
  4837.             } else {
  4838.               console.log("cProto.thumbnailChanged_ - NG");
  4839.  
  4840.             }
  4841.             if (typeof cProto.setSrc_ === 'function' && !cProto.setSrc66_) {
  4842.  
  4843.               cProto.setSrc66_ = cProto.setSrc_;
  4844.               cProto.setSrc_ = function (a) {
  4845.                 if ((((this || 0).$ || 0).img || 0).src === a) return;
  4846.                 return this.setSrc66_.apply(this, arguments)
  4847.               }
  4848.  
  4849.               console.log("cProto.setSrc_ - OK");
  4850.             } else {
  4851.  
  4852.               console.log("cProto.setSrc_ - NG");
  4853.             }
  4854.  
  4855.           })();
  4856.  
  4857.           console.log("[End]");
  4858.  
  4859.           console.groupEnd();
  4860.  
  4861.         }).catch(console.warn);
  4862.  
  4863.       }
  4864.  
  4865.       if (FIX_THUMBNAIL_DATACHANGED) {
  4866.  
  4867.  
  4868.  
  4869.         customElements.whenDefined("yt-live-chat-author-badge-renderer").then(() => {
  4870.  
  4871.           mightFirstCheckOnYtInit();
  4872.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-author-badge-renderer hacks");
  4873.           console.log("[Begin]");
  4874.           (() => {
  4875.  
  4876.             const tag = "yt-live-chat-author-badge-renderer"
  4877.             const dummy = document.createElement(tag);
  4878.  
  4879.             const cProto = getProto(dummy);
  4880.             if (!cProto || !cProto.attached) {
  4881.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4882.               return;
  4883.             }
  4884.  
  4885.  
  4886.             if (typeof cProto.dataChanged === 'function' && !cProto.dataChanged86 && fnIntegrity(cProto.dataChanged) === '1.159.97') {
  4887.  
  4888.  
  4889.  
  4890.               cProto.dataChanged86 = cProto.dataChanged;
  4891.               cProto.dataChanged = function (a) {
  4892.  
  4893.                 /*
  4894.  
  4895.                   for (var b = xC(Z(this.hostElement).querySelector("#image")); b.firstChild; )
  4896.                       b.removeChild(b.firstChild);
  4897.                   if (a)
  4898.                       if (a.icon) {
  4899.                           var c = document.createElement("yt-icon");
  4900.                           "MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge ? (c.icon = "yt-sys-icons:shield-filled",
  4901.                           c.defaultToFilled = !0) : c.icon = "live-chat-badges:" + a.icon.iconType.toLowerCase();
  4902.                           b.appendChild(c)
  4903.                       } else if (a.customThumbnail) {
  4904.                           c = document.createElement("img");
  4905.                           var d;
  4906.                           (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4907.                           b.appendChild(c),
  4908.                           c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail",a.customThumbnail))
  4909.                       }
  4910.  
  4911.                 */
  4912.  
  4913.                 const image = ((this || 0).$ || 0).image
  4914.                 if (image && a && image.firstElementChild) {
  4915.                   let exisiting = image.firstElementChild;
  4916.                   if (exisiting === image.lastElementChild) {
  4917.  
  4918.  
  4919.                     if (a.icon && exisiting.nodeName.toUpperCase() === 'YT-ICON') {
  4920.  
  4921.                       let c = exisiting;
  4922.                       if ("MODERATOR" === a.icon.iconType && this.enableNewModeratorBadge) {
  4923.                         if (c.icon !== "yt-sys-icons:shield-filled") c.icon = "yt-sys-icons:shield-filled";
  4924.                         if (c.defaultToFilled !== true) c.defaultToFilled = true;
  4925.                       } else {
  4926.                         let p = "live-chat-badges:" + a.icon.iconType.toLowerCase();;
  4927.                         if (c.icon !== p) c.icon = p;
  4928.                         if (c.defaultToFilled !== false) c.defaultToFilled = false;
  4929.                       }
  4930.                       return;
  4931.  
  4932.  
  4933.                     } else if (a.customThumbnail && exisiting.nodeName.toUpperCase() == 'IMG') {
  4934.  
  4935.                       let c = exisiting;
  4936.                       if (a.customThumbnail.thumbnails.map(e => e.url).includes(c.src)) {
  4937.  
  4938.                         c.setAttribute("alt", this.hostElement.ariaLabel || "");
  4939.                         return;
  4940.                       }
  4941.                       /*
  4942.  
  4943.                       var d;
  4944.                       (d = (d = KC(a.customThumbnail.thumbnails, 16)) ? lc(oc(d)) : null) ? (c.src = d,
  4945.  
  4946.  
  4947.                         c.setAttribute("alt", this.hostElement.ariaLabel || "")) : lq(new tm("Could not compute URL for thumbnail", a.customThumbnail))
  4948.                         */
  4949.                     }
  4950.  
  4951.  
  4952.                   }
  4953.                 }
  4954.                 return this.dataChanged86.apply(this, arguments)
  4955.  
  4956.               }
  4957.               console.log("cProto.dataChanged - OK");
  4958.  
  4959.             } else {
  4960.               assertor(() => fnIntegrity(cProto.dataChanged, '1.159.97'));
  4961.               console.log("cProto.dataChanged - NG");
  4962.  
  4963.             }
  4964.  
  4965.           })();
  4966.  
  4967.           console.log("[End]");
  4968.  
  4969.           console.groupEnd();
  4970.  
  4971.         }).catch(console.warn);
  4972.  
  4973.  
  4974.       }
  4975.  
  4976.  
  4977.       if (FIX_TOOLTIP_DISPLAY) {
  4978.  
  4979.  
  4980.         customElements.whenDefined("tp-yt-paper-tooltip").then(() => {
  4981.  
  4982.           mightFirstCheckOnYtInit();
  4983.           groupCollapsed("YouTube Super Fast Chat", " | tp-yt-paper-tooltip hacks");
  4984.           console.log("[Begin]");
  4985.           (() => {
  4986.  
  4987.             const tag = "tp-yt-paper-tooltip"
  4988.             const dummy = document.createElement(tag);
  4989.  
  4990.             const cProto = getProto(dummy);
  4991.             if (!cProto || !cProto.attached) {
  4992.               console.warn(`proto.attached for ${tag} is unavailable.`);
  4993.               return;
  4994.             }
  4995.  
  4996.             if (typeof cProto.attached === 'function' && typeof cProto.detached === 'function' && cProto._readyClients && cProto._attachDom && cProto.ready && !cProto._readyClients43) {
  4997.  
  4998.               cProto._readyClients43 = cProto._readyClients;
  4999.               cProto._readyClients = function () {
  5000.                 let r = cProto._readyClients43.apply(this, arguments);
  5001.                 if (this.$ && this.$$ && this.$.tooltip) this.root = null; // fix this.root = null != (b = a.root) ? b : this.host
  5002.                 return r;
  5003.               }
  5004.  
  5005.               console.log("_readyClients - OK");
  5006.  
  5007.             } else {
  5008.               console.log("_readyClients - NG");
  5009.  
  5010.             }
  5011.  
  5012.  
  5013.           })();
  5014.  
  5015.           console.log("[End]");
  5016.  
  5017.           console.groupEnd();
  5018.  
  5019.         }).catch(console.warn);
  5020.  
  5021.  
  5022.  
  5023.       }
  5024.  
  5025.  
  5026.  
  5027.       if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK) {
  5028.  
  5029.  
  5030.         const hookDocumentMouseDownSetupFn = () => {
  5031.  
  5032.  
  5033.  
  5034.           let muzTimestamp = 0;
  5035.           let nszDropdown = null;
  5036.  
  5037.  
  5038.  
  5039.           const handlerObject = {
  5040.  
  5041.             // mdHandler282 : function (evt) {
  5042.             //   // console.log(evt, 1, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5043.             //   if (!evt || !evt.isTrusted) return;
  5044.             //   muzTimestamp = 0;
  5045.             //   nszDropdown = null;
  5046.  
  5047.             //   const hostElement = this.hostElement || this;
  5048.             //   if (!evt || !evt.isTrusted || !hostElement.hasAttribute('menu-visible')) return;
  5049.             //   if (!hostElement.contains(evt.target)) return;
  5050.             //   let targetDropDown = null;
  5051.             //   for(const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')){
  5052.             //     if(dropdown && dropdown.positionTarget && hostElement.contains( dropdown.positionTarget)){
  5053.             //       targetDropDown = dropdown;
  5054.             //     }
  5055.             //   }
  5056.             //   if ((nszDropdown = targetDropDown)) {
  5057.             //     muzTimestamp = Date.now();
  5058.             //     evt.stopImmediatePropagation();
  5059.             //     evt.stopPropagation();
  5060.             //   }
  5061.  
  5062.             // },
  5063.  
  5064.  
  5065.             muHandler282: function (evt) {
  5066.               // console.log(evt, 7, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5067.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5068.               const dropdown = nszDropdown;
  5069.               muzTimestamp = 0;
  5070.               nszDropdown = null;
  5071.  
  5072.               const kurMPC = kRef(currentMenuPivotWR) || 0;
  5073.               const hostElement = kurMPC.hostElement || kurMPC;
  5074.               if (!hostElement.hasAttribute('menu-visible')) return;
  5075.               if (dropdown && dropdown.positionTarget && hostElement.contains(dropdown.positionTarget)) {
  5076.                 muzTimestamp = Date.now();
  5077.                 evt.stopImmediatePropagation();
  5078.                 evt.stopPropagation();
  5079.                 Promise.resolve(dropdown).then((dropdown) => {
  5080.                   dropdown.cancel();
  5081.                 });
  5082.                 // document.body.click();
  5083.               }
  5084.  
  5085.             },
  5086.  
  5087.             mlHandler282: function (evt) {
  5088.               muzTimestamp = 0;
  5089.               nszDropdown = null;
  5090.             },
  5091.  
  5092.             ckHandler282: function (evt) {
  5093.               // console.log(evt, 3, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5094.  
  5095.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5096.               if (Date.now() - muzTimestamp < 40) {
  5097.                 muzTimestamp = Date.now();
  5098.                 evt.stopImmediatePropagation();
  5099.                 evt.stopPropagation();
  5100.               }
  5101.  
  5102.             },
  5103.  
  5104.             tapHandler282: function (evt) {
  5105.               // console.log(evt, 2, document.querySelector('tp-yt-iron-dropdown[focused].style-scope.yt-live-chat-app'))
  5106.  
  5107.               if (!evt || !evt.isTrusted || !muzTimestamp) return;
  5108.               if (Date.now() - muzTimestamp < 40) {
  5109.                 muzTimestamp = Date.now();
  5110.                 evt.stopImmediatePropagation();
  5111.                 evt.stopPropagation();
  5112.               }
  5113.  
  5114.             },
  5115.  
  5116.  
  5117.             handleEvent(evt) {
  5118.  
  5119.  
  5120.               if (evt) {
  5121.                 const kurMPC = kRef(currentMenuPivotWR) || 0;
  5122.                 const cnt = kurMPC.inst || kurMPC;
  5123.                 const hostElement = cnt.hostElement || cnt;
  5124.                 if (!cnt || cnt.isAttached !== true || hostElement.isConnected !== true) return;
  5125.                 switch (evt.type) {
  5126.                   // case 'mousedown':
  5127.                   // return this.mdHandler282.call(kurMPC, evt);
  5128.                   case 'mouseup':
  5129.                     return this.muHandler282(evt);
  5130.                   case 'mouseleave':
  5131.                     return this.mlHandler282(evt);
  5132.                   case 'tap':
  5133.                     return this.tapHandler282(evt);
  5134.                   case 'click':
  5135.                     return this.ckHandler282(evt);
  5136.                 }
  5137.               }
  5138.  
  5139.             }
  5140.  
  5141.  
  5142.  
  5143.           }
  5144.  
  5145.           document.addEventListener('mousedown', function (evt) {
  5146.  
  5147.             if (!evt || !evt.isTrusted || !evt.target) return;
  5148.             muzTimestamp = 0;
  5149.             nszDropdown = null;
  5150.  
  5151.             /** @type {HTMLElement | null} */
  5152.             const kurMP = kRef(currentMenuPivotWR);
  5153.             if (!kurMP) return;
  5154.             const kurMPC = kurMP.closest('[menu-visible]') || 0;
  5155.  
  5156.             if (!kurMPC.isClickableChatRow111 || !kurMPC.isClickableChatRow111() || !kurMPC.contains(evt.target)) return;
  5157.  
  5158.             let targetDropDown = null;
  5159.             for (const dropdown of document.querySelectorAll('tp-yt-iron-dropdown.style-scope.yt-live-chat-app')) {
  5160.               if (dropdown && dropdown.positionTarget === kurMP) {
  5161.                 targetDropDown = dropdown;
  5162.               }
  5163.             }
  5164.  
  5165.             if ((nszDropdown = targetDropDown)) {
  5166.               muzTimestamp = Date.now();
  5167.               evt.stopImmediatePropagation();
  5168.               evt.stopPropagation();
  5169.               currentMenuPivotWR = mWeakRef(kurMPC);
  5170.  
  5171.               const listenOpts = { capture: true, passive: false, once: true };
  5172.  
  5173.               // remove unexcecuted eventHandler
  5174.               document.removeEventListener('mouseup', handlerObject, listenOpts);
  5175.               document.removeEventListener('mouseleave', handlerObject, listenOpts);
  5176.               document.removeEventListener('tap', handlerObject, listenOpts);
  5177.               document.removeEventListener('click', handlerObject, listenOpts);
  5178.  
  5179.               // inject one time eventHandler to by pass events
  5180.               document.addEventListener('mouseup', handlerObject, listenOpts);
  5181.               document.addEventListener('mouseleave', handlerObject, listenOpts);
  5182.               document.addEventListener('tap', handlerObject, listenOpts);
  5183.               document.addEventListener('click', handlerObject, listenOpts);
  5184.  
  5185.             }
  5186.  
  5187.           }, true);
  5188.  
  5189.         }
  5190.  
  5191.  
  5192.         customElements.whenDefined('yt-live-chat-text-message-renderer').then(() => {
  5193.  
  5194.  
  5195.           mightFirstCheckOnYtInit();
  5196.           groupCollapsed("YouTube Super Fast Chat", " | yt-live-chat-text-message-renderer hacks");
  5197.           console.log("[Begin]");
  5198.           (() => {
  5199.  
  5200.             const tag = "yt-live-chat-text-message-renderer"
  5201.             const dummy = document.createElement(tag);
  5202.  
  5203.             const cProto = getProto(dummy);
  5204.             if (!cProto || !cProto.attached) {
  5205.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5206.               return;
  5207.             }
  5208.  
  5209.             /*
  5210.  
  5211.  
  5212.  
  5213.                 remarks:
  5214.                             
  5215.                 const w=new Set();
  5216.                 setInterval(()=>{
  5217.                 for(const a of document.getElementsByTagName('*')) if(a.shouldSupportWholeItemClick) w.add(a.is||''); 
  5218.                 console.log([...w.keys()]);
  5219.                 },800);
  5220.  
  5221.                             
  5222.                 [
  5223.                 "yt-live-chat-ticker-sponsor-item-renderer",
  5224.                 "yt-live-chat-banner-header-renderer",
  5225.                 "yt-live-chat-text-message-renderer",
  5226.                 "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5227.                 "ytd-sponsorships-live-chat-header-renderer",
  5228.                 "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer"
  5229.                 ]
  5230.               
  5231.             */
  5232.  
  5233.             cProto.isClickableChatRow111 = function () {
  5234.               return (
  5235.                 this.data && typeof this.shouldSupportWholeItemClick === 'function' && typeof this.hasModerationOverlayVisible === 'function' &&
  5236.                 this.data.contextMenuEndpoint && this.wholeMessageClickable && this.shouldSupportWholeItemClick() && !this.hasModerationOverlayVisible()
  5237.               ); // follow .onItemTap(a)
  5238.             }
  5239.  
  5240.  
  5241.  
  5242.             const toHookDocumentMouseDown = typeof cProto.shouldSupportWholeItemClick === 'function' && typeof cProto.hasModerationOverlayVisible === 'function';
  5243.  
  5244.             if (toHookDocumentMouseDown) {
  5245.  
  5246.               hookDocumentMouseDownSetupFn();
  5247.  
  5248.  
  5249.               console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent OK");
  5250.  
  5251.  
  5252.  
  5253.             } else {
  5254.  
  5255.               console.log("FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK - Doc MouseEvent NG");
  5256.  
  5257.             }
  5258.  
  5259.  
  5260.  
  5261.  
  5262.           })();
  5263.  
  5264.           console.log("[End]");
  5265.  
  5266.           console.groupEnd();
  5267.  
  5268.         }).catch(console.warn);
  5269.  
  5270.  
  5271.       }
  5272.  
  5273.  
  5274.       if (PREREQUEST_CONTEXT_MENU_ON_MOUSE_DOWN) {
  5275.  
  5276.         document.addEventListener('mousedown', function (evt) {
  5277.  
  5278.           const maxloopDOMTreeElements = 4;
  5279.           const maxloopYtCompontents = 4;
  5280.           let j1 = 0;
  5281.           let j2 = 0;
  5282.           let target = (evt || 0).target || 0;
  5283.           if (!target) return;
  5284.  
  5285.  
  5286.           while (target instanceof HTMLElement) {
  5287.             if (++j1 > maxloopDOMTreeElements) break;
  5288.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') break;
  5289.             target = nodeParent(target);
  5290.           }
  5291.           const components = [];
  5292.           while (target instanceof HTMLElement) {
  5293.             if (++j2 > maxloopYtCompontents) break;
  5294.             if (typeof (target.is || (target.inst || 0).is || null) === 'string') {
  5295.               components.push(target);
  5296.             }
  5297.             if (typeof (target.inst || target).showContextMenu === 'function') break;
  5298.             target = target.parentComponent || (target.inst || 0).parentComponent || null;
  5299.           }
  5300.           if (!(target instanceof HTMLElement)) return;
  5301.           const targetCnt = target.inst || target;
  5302.           if (typeof targetCnt.handleGetContextMenuResponse_ !== 'function' || typeof targetCnt.handleGetContextMenuError !== 'function') {
  5303.             console.log('Error Found: handleGetContextMenuResponse_ OR handleGetContextMenuError is not defined on a component with showContextMenu')
  5304.             return;
  5305.           }
  5306.  
  5307.           const endpoint = (targetCnt.data || 0).contextMenuEndpoint
  5308.           if (!endpoint) return;
  5309.           if (targetCnt.opened || !targetCnt.isAttached) return;
  5310.  
  5311.           if (typeof targetCnt.__cacheResolvedEndpointData__ !== 'function') {
  5312.             console.log(`preRequest for showContextMenu in ${targetCnt.is} is not yet supported.`)
  5313.           }
  5314.  
  5315.           let doPreRequest = false;
  5316.           if (components.length >= 2 && components[0].id === 'menu-button' && (target.$ || 0)['menu-button'] === components[0]) {
  5317.             doPreRequest = true;
  5318.           } else if (components.length === 1 && components[0] === target) {
  5319.             doPreRequest = true;
  5320.           } else if (components.length >= 2 && components[0].id === 'author-photo' && (target.$ || 0)['author-photo'] === components[0]) {
  5321.             doPreRequest = true;
  5322.           }
  5323.           if (doPreRequest === false) {
  5324.             console.log('doPreRequest = fasle on showContextMenu', components);
  5325.             return;
  5326.           }
  5327.  
  5328.           if (targetCnt.__getCachedEndpointData__(endpoint)) return;
  5329.  
  5330.           if (!targetCnt.__showContextMenu_mutex_unlock_isEmpty__()) {
  5331.             console.log('preRequest on showContextMenu aborted due to stacked network request');
  5332.             return;
  5333.           }
  5334.  
  5335.  
  5336.           const onSuccess = (a) => {
  5337.             /*
  5338.  
  5339.               dQ() && (a = a.response);
  5340.               a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && this.showContextMenu_(a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5341.               a.actions && Eu(this.hostElement, "yt-live-chat-actions", [a.actions])
  5342.               
  5343.             */
  5344.  
  5345.             a = a.response || a;
  5346.  
  5347.             if (!a) {
  5348.               console.log('unexpected error in prerequest for showContextMenu.onSuccess');
  5349.               return;
  5350.             }
  5351.  
  5352.             let z = null;
  5353.             a.liveChatItemContextMenuSupportedRenderers && a.liveChatItemContextMenuSupportedRenderers.menuRenderer && (z = a.liveChatItemContextMenuSupportedRenderers.menuRenderer);
  5354.  
  5355.             if (z) {
  5356.               a = z;
  5357.               targetCnt.__cacheResolvedEndpointData__(endpoint, a, true);
  5358.             }
  5359.  
  5360.           };
  5361.           const onFailure = (a) => {
  5362.  
  5363.             /*
  5364.  
  5365.               if (a instanceof Error || a instanceof Object || a instanceof String)
  5366.                   var b = a;
  5367.               hq(new xm("Error encountered calling GetLiveChatItemContextMenu",b))
  5368.  
  5369.             */
  5370.  
  5371.             targetCnt.__cacheResolvedEndpointData__(endpoint, null);
  5372.             // console.log('onFailure', a)
  5373.  
  5374.           };
  5375.  
  5376.           if (doPreRequest) {
  5377.  
  5378.             let propertyCounter = 0;
  5379.             let p1unlock = null;
  5380.             const p1 = new Promise(r => {
  5381.               p1unlock = r;
  5382.             });
  5383.             const p1Timeout = 800;
  5384.             const proxyKey = '__$$__proxy_to_this__$$__' + Date.now();
  5385.  
  5386.             try {
  5387.  
  5388.               const onSuccessHelperFn = function () {
  5389.                 p1unlock && p1unlock();
  5390.                 p1unlock = null;
  5391.                 if (propertyCounter !== 5) {
  5392.                   console.log('Error in prerequest for showContextMenu.onSuccessHelperFn')
  5393.                   return;
  5394.                 }
  5395.                 if (this[proxyKey] !== targetCnt) {
  5396.                   console.log('Error in prerequest for showContextMenu.this');
  5397.                   return;
  5398.                 }
  5399.                 onSuccess(...arguments);
  5400.               };
  5401.               const onFailureHelperFn = function () {
  5402.                 p1unlock && p1unlock();
  5403.                 p1unlock = null;
  5404.                 if (propertyCounter !== 5) {
  5405.                   console.log('Error in prerequest for showContextMenu.onFailureHelperFn')
  5406.                   return;
  5407.                 }
  5408.                 if (this[proxyKey] !== targetCnt) {
  5409.                   console.log('Error in prerequest for showContextMenu.this');
  5410.                   return;
  5411.                 }
  5412.                 onFailure(...arguments);
  5413.  
  5414.               }
  5415.               const fakeTargetCnt = new Proxy({
  5416.                 __showContextMenu_forceNativeRequest__: 1,
  5417.                 __showContextMenu_sync_mode_request__: 1,
  5418.                 get handleGetContextMenuResponse_() {
  5419.                   propertyCounter += 2;
  5420.                   return onSuccessHelperFn;
  5421.                 },
  5422.                 get handleGetContextMenuError() {
  5423.                   propertyCounter += 3;
  5424.                   return onFailureHelperFn;
  5425.                 }
  5426.               }, {
  5427.                 get(_, key, receiver) {
  5428.                   if (key in _) return _[key];
  5429.                   if (key === proxyKey) return targetCnt;
  5430.  
  5431.                   let giveNative = false;
  5432.                   if (key in targetCnt) {
  5433.                     if (key === 'data') giveNative = true;
  5434.                     else if (typeof targetCnt[key] === 'function') giveNative = true;
  5435.                   }
  5436.                   if (giveNative) return targetCnt[key];
  5437.                 }
  5438.               });
  5439.  
  5440.               const fakeEvent = (() => {
  5441.                 const { target, bubbles, cancelable, cancelBubble, srcElement, timeStamp, defaultPrevented, currentTarget, composed } = evt;
  5442.                 const nf = function () { }
  5443.                 const [stopPropagation, stopImmediatePropagation, preventDefault] = [nf, nf, nf];
  5444.  
  5445.                 return {
  5446.                   type: 'tap',
  5447.                   eventPhase: 0,
  5448.                   isTrusted: false,
  5449.                   __composed: true,
  5450.                   bubbles, cancelable, cancelBubble, timeStamp,
  5451.                   target, srcElement, defaultPrevented, currentTarget, composed,
  5452.                   stopPropagation, stopImmediatePropagation, preventDefault
  5453.                 };
  5454.               })(evt);
  5455.               targetCnt.showContextMenu.call(fakeTargetCnt, fakeEvent);
  5456.  
  5457.  
  5458.             } catch (e) {
  5459.               console.warn(e);
  5460.               propertyCounter = 7;
  5461.  
  5462.             }
  5463.             if (propertyCounter !== 5) {
  5464.               console.log('Error in prerequest for showContextMenu', propertyCounter);
  5465.               return;
  5466.             }
  5467.             targetCnt.__showContextMenu_assign_lock__(p1);
  5468.             setTimeout(() => {
  5469.               p1unlock && p1unlock();
  5470.               p1unlock = null;
  5471.             }, p1Timeout);
  5472.           }
  5473.  
  5474.  
  5475.  
  5476.  
  5477.  
  5478.  
  5479.         }, true);
  5480.  
  5481.  
  5482.       }
  5483.  
  5484.  
  5485.  
  5486.       /*
  5487.  
  5488.       const w=new Set(); for(const a of document.getElementsByTagName('*')) if(a.showContextMenu && a.showContextMenu_) w.add(a.is||''); console.log([...w.keys()])
  5489.  
  5490.       */
  5491.  
  5492.       let pTags = [];
  5493.       const sTags = [
  5494.         "yt-live-chat-ticker-sponsor-item-renderer",
  5495.         "yt-live-chat-banner-header-renderer",
  5496.         "yt-live-chat-text-message-renderer",
  5497.         "ytd-sponsorships-live-chat-gift-purchase-announcement-renderer",
  5498.         "ytd-sponsorships-live-chat-header-renderer",
  5499.         "ytd-sponsorships-live-chat-gift-redemption-announcement-renderer"
  5500.       ];
  5501.  
  5502.       for (const tag of sTags) {
  5503.         pTags.push(customElements.whenDefined(tag));
  5504.       }
  5505.  
  5506.  
  5507.       Promise.all(pTags).then(() => {
  5508.  
  5509.  
  5510.         mightFirstCheckOnYtInit();
  5511.         groupCollapsed("YouTube Super Fast Chat", " | fixShowContextMenu");
  5512.         console.log("[Begin]");
  5513.  
  5514.         for (const tag of sTags) {
  5515.  
  5516.  
  5517.  
  5518.           (() => {
  5519.  
  5520.             const dummy = document.createElement(tag);
  5521.  
  5522.             const cProto = getProto(dummy);
  5523.             if (!cProto || !cProto.attached) {
  5524.               console.warn(`proto.attached for ${tag} is unavailable.`);
  5525.               return;
  5526.             }
  5527.  
  5528.  
  5529.  
  5530.  
  5531.             if (CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN && typeof cProto.showContextMenu === 'function' && typeof cProto.showContextMenu_ === 'function' && !cProto.showContextMenu37 && !cProto.showContextMenu37_ && cProto.showContextMenu.length === 1 && cProto.showContextMenu_.length === 1) {
  5532.  
  5533.               cProto.showContextMenu37_ = cProto.showContextMenu_;
  5534.               cProto.showContextMenu37 = cProto.showContextMenu;
  5535.  
  5536.               function deepCopy(obj, skipKeys) {
  5537.                 skipKeys = skipKeys || [];
  5538.                 if (!obj || typeof obj !== 'object') return obj;
  5539.                 if (Array.isArray(obj)) {
  5540.                   return obj.map(item => deepCopy(item, skipKeys));
  5541.                 }
  5542.                 const copy = {};
  5543.                 for (let key in obj) {
  5544.                   if (!skipKeys.includes(key)) {
  5545.                     copy[key] = deepCopy(obj[key], skipKeys);
  5546.                   }
  5547.                 }
  5548.                 return copy;
  5549.               }
  5550.  
  5551.               /*
  5552.               const wm37 = new WeakMap();
  5553.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5554.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5555.                 if (a) {
  5556.                   if (doDeepCopy) a = deepCopy(a);
  5557.                   wm37.set(endpoint, a);
  5558.                 } else {
  5559.                   wm37.remove(endpoint);
  5560.                 }
  5561.               }
  5562.               cProto.__showContextMenuNetworkRequestMutex__ = null;
  5563.               cProto.__showContextMenuNetworkRequestMutexResolve__  = null;
  5564.               cProto.showContextMenu = function (a) {
  5565.                 if(this.__showContextMenu_forceNativeRequest__){
  5566.                   return this.showContextMenu37(a);
  5567.                 }
  5568.                 const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5569.                 if (!endpoint) {
  5570.                   return this.showContextMenu37(a);
  5571.                 }
  5572.                 this.__showContextMenuNetworkRequestMutex__ = (this.__showContextMenuNetworkRequestMutex__ || Promise.resolve())
  5573.                 .then(()=>new Promise(lockResolve=>{
  5574.  
  5575.                   if (endpoint !== (this.data || 0).contextMenuEndpoint || 0){
  5576.                     lockResolve();
  5577.                     return;
  5578.                   }
  5579.  
  5580.                   if (endpoint) {
  5581.                     let resolvedEndpoint = wm37.get(endpoint);
  5582.                     if (resolvedEndpoint) {
  5583.                       resolvedEndpoint = deepCopy(resolvedEndpoint);
  5584.                       // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5585.                       Promise.resolve(resolvedEndpoint).then(() => {
  5586.                         this.showContextMenu37_(resolvedEndpoint);
  5587.                       });
  5588.                       lockResolve();
  5589.                       return;
  5590.                       //this.showContextMenu37_(JSON.parse(JSON.stringify(a)));
  5591.                       //return;
  5592.                     }
  5593.  
  5594.                     this.__showContextMenuNetworkRequestMutexResolve__ = new Promise(resolve=>{
  5595.                       this.__showContextMenuNetworkRequestMutexResolve__ = resolve;
  5596.       
  5597.                     }).then((a)=>{
  5598.  
  5599.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5600.                   if (endpoint) {
  5601.                     const f = this.__cacheResolvedEndpointData__
  5602.                     if (typeof f === 'function') f(endpoint, a, true);
  5603.                   }
  5604.                    this.showContextMenu37_(a);
  5605.                    lockResolve();
  5606.  
  5607.                     }).catch(console.warn)
  5608.  
  5609.                   }else{
  5610.  
  5611.                     this.__showContextMenuNetworkRequestMutexResolve__ = null;
  5612.                     this.showContextMenu37(a);
  5613.                     lockResolve();
  5614.                   }
  5615.  
  5616.  
  5617.  
  5618.  
  5619.                 })).catch(console.warn);
  5620.               }
  5621.  
  5622.               cProto.showContextMenu_ = function (a) {
  5623.  
  5624.                 let resolve = this.__showContextMenuNetworkRequestMutexResolve__;
  5625.                 this.__showContextMenuNetworkRequestMutexResolve__= null;
  5626.  
  5627.                 if (resolve) {
  5628.                   resolve(a);
  5629.                 } else {
  5630.                   return this.showContextMenu37_(a);
  5631.                 }
  5632.  
  5633.               }
  5634.               */
  5635.  
  5636.  
  5637.               const wm37 = new WeakMap();
  5638.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5639.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5640.                 if (a) {
  5641.                   if (doDeepCopy) a = deepCopy(a);
  5642.                   wm37.set(endpoint, a);
  5643.                 } else {
  5644.                   wm37.remove(endpoint);
  5645.                 }
  5646.               }
  5647.               cProto.__getCachedEndpointData__ = function (endpoint) {
  5648.                 endpoint = endpoint || (this.data || 0).contextMenuEndpoint || 0;
  5649.                 if (endpoint) return wm37.get(endpoint);
  5650.                 return null;
  5651.               }
  5652.               cProto.__showCachedContextMenu__ = function (resolvedEndpoint) { // non-null
  5653.  
  5654.                 resolvedEndpoint = deepCopy(resolvedEndpoint);
  5655.                 // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5656.                 Promise.resolve(resolvedEndpoint).then(() => {
  5657.                   this.__showContextMenu_skip_cacheResolvedEndpointData__ = 1;
  5658.                   this.showContextMenu_(resolvedEndpoint);
  5659.                   this.__showContextMenu_skip_cacheResolvedEndpointData__ = 0;
  5660.                 });
  5661.  
  5662.  
  5663.  
  5664.               }
  5665.               cProto.showContextMenu = function (a) {
  5666.                 if (!this.__showContextMenu_forceNativeRequest__) {
  5667.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5668.                   if (endpoint) {
  5669.                     const resolvedEndpoint = this.__getCachedEndpointData__(endpoint);
  5670.                     if (resolvedEndpoint) {
  5671.                       this.__showCachedContextMenu__(resolvedEndpoint);
  5672.                       return;
  5673.                     }
  5674.                   }
  5675.                 }
  5676.                 return this.showContextMenu37(a);
  5677.               }
  5678.  
  5679.               cProto.showContextMenu_ = function (a) {
  5680.                 if (!this.__showContextMenu_skip_cacheResolvedEndpointData__) {
  5681.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5682.                   if (endpoint) {
  5683.                     const f = this.__cacheResolvedEndpointData__;
  5684.                     if (typeof f === 'function') f(endpoint, a, true);
  5685.                   }
  5686.                 }
  5687.                 return this.showContextMenu37_(a);
  5688.               }
  5689.  
  5690.  
  5691.  
  5692.  
  5693.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN - OK", tag);
  5694.  
  5695.  
  5696.  
  5697.             } else {
  5698.  
  5699.               console.log("CACHE_SHOW_CONTEXT_MENU_FOR_REOPEN -  NG", tag);
  5700.  
  5701.             }
  5702.  
  5703.  
  5704.  
  5705.  
  5706.  
  5707.  
  5708.             if (ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU && typeof cProto.showContextMenu === 'function' && typeof cProto.showContextMenu_ === 'function' && !cProto.showContextMenu47 && !cProto.showContextMenu47_ && cProto.showContextMenu.length === 1 && cProto.showContextMenu_.length === 1) {
  5709.  
  5710.               cProto.showContextMenu47_ = cProto.showContextMenu_;
  5711.               cProto.showContextMenu47 = cProto.showContextMenu;
  5712.  
  5713.               const mutex = new Mutex();
  5714.               let __showContextMenu_mutex_unlock__ = null;
  5715.               cProto.__showContextMenu_mutex_unlock_isEmpty__ = () => {
  5716.                 return __showContextMenu_mutex_unlock__ === null;
  5717.               }
  5718.               cProto.__showContextMenu_assign_lock__ = function (p) {
  5719.  
  5720.  
  5721.                 mutex.lockWith(unlock => {
  5722.                   p.then(unlock);
  5723.                 });
  5724.  
  5725.               }
  5726.               let lastShowMenuTarget = null;
  5727.               cProto.showContextMenu = function (a) {
  5728.                 lastShowMenuTarget = this;
  5729.  
  5730.                 if (this.__showContextMenu_sync_mode_request__) {
  5731.  
  5732.                   return this.showContextMenu47(a);
  5733.                 } else {
  5734.  
  5735.  
  5736.                   mutex.lockWith(unlock => {
  5737.                     if (lastShowMenuTarget !== this) {
  5738.                       unlock();
  5739.                       return;
  5740.                     }
  5741.  
  5742.                     setTimeout(unlock, 800); // in case network failure
  5743.                     __showContextMenu_mutex_unlock__ = unlock;
  5744.                     try {
  5745.                       this.showContextMenu47(a);
  5746.                     } catch (e) {
  5747.                       console.warn(e);
  5748.                       unlock(); // in case function script error
  5749.                     }
  5750.  
  5751.                   });
  5752.  
  5753.                 }
  5754.  
  5755.  
  5756.               }
  5757.  
  5758.  
  5759.               cProto.showContextMenu_ = function (a) {
  5760.  
  5761.                 if (__showContextMenu_mutex_unlock__ && this === lastShowMenuTarget) {
  5762.                   __showContextMenu_mutex_unlock__();
  5763.                   __showContextMenu_mutex_unlock__ = null;
  5764.                 }
  5765.                 return this.showContextMenu47_(a);
  5766.  
  5767.               }
  5768.  
  5769.               /*
  5770.               const wm37 = new WeakMap();
  5771.               cProto.__showContextMenu_forceNativeRequest__ = 0;
  5772.               cProto.__cacheResolvedEndpointData__ = (endpoint, a, doDeepCopy) => {
  5773.                 if (a) {
  5774.                   if (doDeepCopy) a = deepCopy(a);
  5775.                   wm37.set(endpoint, a);
  5776.                 } else {
  5777.                   wm37.remove(endpoint);
  5778.                 }
  5779.               }
  5780.               cProto.__showContextMenuNetworkRequestMutex__ = null;
  5781.               cProto.__showContextMenuNetworkRequestMutexResolve__  = null;
  5782.               cProto.showContextMenu = function (a) {
  5783.                 if(this.__showContextMenu_forceNativeRequest__){
  5784.                   return this.showContextMenu37(a);
  5785.                 }
  5786.                 const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5787.                 if (!endpoint) {
  5788.                   return this.showContextMenu37(a);
  5789.                 }
  5790.                 this.__showContextMenuNetworkRequestMutex__ = (this.__showContextMenuNetworkRequestMutex__ || Promise.resolve())
  5791.                 .then(()=>new Promise(lockResolve=>{
  5792.  
  5793.                   if (endpoint !== (this.data || 0).contextMenuEndpoint || 0){
  5794.                     lockResolve();
  5795.                     return;
  5796.                   }
  5797.  
  5798.                   if (endpoint) {
  5799.                     let resolvedEndpoint = wm37.get(endpoint);
  5800.                     if (resolvedEndpoint) {
  5801.                       resolvedEndpoint = deepCopy(resolvedEndpoint);
  5802.                       // let b = deepCopy(resolvedEndpoint, ['trackingParams', 'clickTrackingParams'])
  5803.                       Promise.resolve(resolvedEndpoint).then(() => {
  5804.                         this.showContextMenu37_(resolvedEndpoint);
  5805.                       });
  5806.                       lockResolve();
  5807.                       return;
  5808.                       //this.showContextMenu37_(JSON.parse(JSON.stringify(a)));
  5809.                       //return;
  5810.                     }
  5811.  
  5812.                     this.__showContextMenuNetworkRequestMutexResolve__ = new Promise(resolve=>{
  5813.                       this.__showContextMenuNetworkRequestMutexResolve__ = resolve;
  5814.       
  5815.                     }).then((a)=>{
  5816.  
  5817.                   const endpoint = (this.data || 0).contextMenuEndpoint || 0;
  5818.                   if (endpoint) {
  5819.                     const f = this.__cacheResolvedEndpointData__
  5820.                     if (typeof f === 'function') f(endpoint, a, true);
  5821.                   }
  5822.                    this.showContextMenu37_(a);
  5823.                    lockResolve();
  5824.  
  5825.                     }).catch(console.warn)
  5826.  
  5827.                   }else{
  5828.  
  5829.                     this.__showContextMenuNetworkRequestMutexResolve__ = null;
  5830.                     this.showContextMenu37(a);
  5831.                     lockResolve();
  5832.                   }
  5833.  
  5834.  
  5835.  
  5836.  
  5837.                 })).catch(console.warn);
  5838.               }
  5839.  
  5840.               cProto.showContextMenu_ = function (a) {
  5841.  
  5842.                 let resolve = this.__showContextMenuNetworkRequestMutexResolve__;
  5843.                 this.__showContextMenuNetworkRequestMutexResolve__= null;
  5844.  
  5845.                 if (resolve) {
  5846.                   resolve(a);
  5847.                 } else {
  5848.                   return this.showContextMenu37_(a);
  5849.                 }
  5850.  
  5851.               }
  5852.               */
  5853.  
  5854.  
  5855.  
  5856.  
  5857.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU - OK", tag);
  5858.  
  5859.  
  5860.  
  5861.             } else {
  5862.  
  5863.               console.log("ENABLE_MUTEX_FOR_SHOW_CONTEXT_MENU -  NG", tag);
  5864.  
  5865.             }
  5866.  
  5867.  
  5868.  
  5869.  
  5870.           })();
  5871.  
  5872.         }
  5873.  
  5874.  
  5875.  
  5876.         console.log("[End]");
  5877.  
  5878.         console.groupEnd();
  5879.  
  5880.       }).catch(console.warn);
  5881.  
  5882.  
  5883.  
  5884.       customElements.whenDefined('tp-yt-iron-dropdown').then(() => {
  5885.  
  5886.         mightFirstCheckOnYtInit();
  5887.         groupCollapsed("YouTube Super Fast Chat", " | tp-yt-iron-dropdown hacks");
  5888.         console.log("[Begin]");
  5889.         (() => {
  5890.  
  5891.           const tag = "tp-yt-iron-dropdown";
  5892.           const dummy = document.createElement(tag);
  5893.  
  5894.           const cProto = getProto(dummy);
  5895.           if (!cProto || !cProto.attached) {
  5896.             console.warn(`proto.attached for ${tag} is unavailable.`);
  5897.             return;
  5898.           }
  5899.  
  5900.  
  5901.           if (USE_VANILLA_DEREF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf34 && fnIntegrity(cProto.__deraf) === '2.42.24') {
  5902.             cProto.__deraf_hn__ = function (sId, fn) {
  5903.               const rhKey = `_rafHandler_${sId}`;
  5904.               const m = this[rhKey] || (this[rhKey] = new WeakMap());
  5905.               if (m.has(fn)) return m.get(fn);
  5906.               const resFn = () => {
  5907.                 this.__rafs[sId] = null;
  5908.                 fn.call(this)
  5909.               };
  5910.               m.set(fn, resFn);
  5911.               m.set(resFn, resFn);
  5912.               return resFn;
  5913.             };
  5914.             cProto.__deraf34 = cProto.__deraf;
  5915.             cProto.__deraf = function (a, b) { // sId, fn
  5916.               let c = this.__rafs;
  5917.               null !== c[a] && cancelAnimationFrame(c[a]);
  5918.               c[a] = requestAnimationFrame(this.__deraf_hn__(a, b));
  5919.             };
  5920.             console.log("USE_VANILLA_DEREF - OK");
  5921.           } else {
  5922.             console.log("USE_VANILLA_DEREF - NG");
  5923.           }
  5924.  
  5925.           if (FIX_DROPDOWN_DERAF && typeof cProto.__deraf === 'function' && cProto.__deraf.length === 2 && !cProto.__deraf66) {
  5926.             cProto.__deraf66 = cProto.__deraf;
  5927.             cProto.__deraf = function (sId, fn) {
  5928.               if (this.__byPassRAF__) {
  5929.                 Promise.resolve().then(() => {
  5930.                   fn.call(this);
  5931.                 });
  5932.               }
  5933.               let r = this.__deraf66.apply(this, arguments);
  5934.               return r;
  5935.             }
  5936.             console.log("FIX_DROPDOWN_DERAF - OK");
  5937.           } else {
  5938.             console.log("FIX_DROPDOWN_DERAF - NG");
  5939.           }
  5940.  
  5941.  
  5942.           if (BOOST_MENU_OPENCHANGED_RENDERING && typeof cProto.__openedChanged === 'function' && !cProto.__mtChanged__ && fnIntegrity(cProto.__openedChanged) === '0.46.20') {
  5943.  
  5944.             let lastClose = null;
  5945.             let lastOpen = null;
  5946.             let cid = 0;
  5947.  
  5948.             cProto.__mtChanged__ = function (b) {
  5949.  
  5950.               Promise.resolve().then(() => {
  5951.                 this._applyFocus();
  5952.               }).then(() => {
  5953.                 b ? this._renderOpened() : this._renderClosed();
  5954.               }).catch(console.warn);
  5955.  
  5956.             };
  5957.  
  5958.             const __moChanged__ = () => {
  5959.               if (!cid) return;
  5960.               // console.log(553, !!lastOpen, !!lastClose);
  5961.               cid = 0;
  5962.               if (lastOpen && !lastClose && lastOpen.isAttached) {
  5963.                 lastOpen.__mtChanged__(1)
  5964.               } else if (lastClose && !lastOpen && lastClose.isAttached) {
  5965.                 lastClose.__mtChanged__(0);
  5966.               }
  5967.               lastOpen = null;
  5968.               lastClose = null;
  5969.             };
  5970.  
  5971.  
  5972.             if (typeof cProto._openedChanged === 'function' && !cProto._openedChanged66) {
  5973.               cProto._openedChanged66 = cProto._openedChanged;
  5974.               cProto._openedChanged = function () {
  5975.                 // this.__byPassRAF__ = !lastOpen ? true : false; // or just true?
  5976.                 this.__byPassRAF__ = true;
  5977.                 let r = this._openedChanged66.apply(this, arguments);
  5978.                 this.__byPassRAF__ = false;
  5979.                 return r;
  5980.               }
  5981.             }
  5982.  
  5983.             const pSetGet = (key, pdThis, pdBase) => {
  5984.               // note: this is not really a standard way for the getOwnPropertyDescriptors; but it is sufficient to make the job done
  5985.               return {
  5986.                 get: (pdThis[key] || 0).get || (pdBase[key] || 0).get,
  5987.                 set: (pdThis[key] || 0).set || (pdBase[key] || 0).set
  5988.               };
  5989.             };
  5990.  
  5991.             cProto.__modifiedMenuPropsFn__ = function () {
  5992.               const pdThis = Object.getOwnPropertyDescriptors(this.constructor.prototype)
  5993.               const pdBase = Object.getOwnPropertyDescriptors(this)
  5994.  
  5995.               const pdAutoFitOnAttach = pSetGet('autoFitOnAttach', pdThis, pdBase);
  5996.               const pdExpandSizingTargetForScrollbars = pSetGet('expandSizingTargetForScrollbars', pdThis, pdBase);
  5997.               const pdAllowOutsideScroll = pSetGet('allowOutsideScroll', pdThis, pdBase);
  5998.  
  5999.               if (pdAutoFitOnAttach.get || pdAutoFitOnAttach.set) {
  6000.                 console.warn('there is setter/getter for autoFitOnAttach');
  6001.                 return;
  6002.               }
  6003.               if (pdExpandSizingTargetForScrollbars.get || pdExpandSizingTargetForScrollbars.set) {
  6004.                 console.warn('there is setter/getter for expandSizingTargetForScrollbars');
  6005.                 return;
  6006.               }
  6007.               if (!pdAllowOutsideScroll.get || !pdAllowOutsideScroll.set) {
  6008.                 console.warn('there is NO setter-getter for allowOutsideScroll');
  6009.                 return;
  6010.               }
  6011.  
  6012.               let { autoFitOnAttach, expandSizingTargetForScrollbars, allowOutsideScroll } = this;
  6013.  
  6014.               this.__AllowOutsideScrollPD__ = pdAllowOutsideScroll;
  6015.  
  6016.               const fitEnable = CHAT_MENU_REFIT_ALONG_SCROLLING === 2;
  6017.  
  6018.               Object.defineProperties(this, {
  6019.                 autoFitOnAttach: {
  6020.                   get() {
  6021.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6022.                     return autoFitOnAttach;
  6023.                   },
  6024.                   set(nv) {
  6025.                     autoFitOnAttach = nv;
  6026.                     return true;
  6027.                   },
  6028.                   enumerable: true,
  6029.                   configurable: true
  6030.                 }, expandSizingTargetForScrollbars: {
  6031.                   get() {
  6032.                     if (fitEnable && this._modifiedMenuPropOn062__) return true;
  6033.                     return expandSizingTargetForScrollbars;
  6034.                   },
  6035.                   set(nv) {
  6036.                     expandSizingTargetForScrollbars = nv;
  6037.                     return true;
  6038.                   },
  6039.                   enumerable: true,
  6040.                   configurable: true
  6041.                 }, allowOutsideScroll: {
  6042.                   get() {
  6043.                     if (this._modifiedMenuPropOn062__) return true;
  6044.                     return allowOutsideScroll;
  6045.                   },
  6046.                   set(nv) {
  6047.                     allowOutsideScroll = nv;
  6048.                     this.__AllowOutsideScrollPD__.set.call(this, nv);
  6049.                     return true;
  6050.                   },
  6051.                   enumerable: true,
  6052.                   configurable: true
  6053.                 }
  6054.               })
  6055.             };
  6056.  
  6057.             /*
  6058.                // ***** position() to be changed. *****
  6059.               tp-yt-iron-dropdown[class], tp-yt-iron-dropdown[class] #contentWrapper, tp-yt-iron-dropdown[class] ytd-menu-popup-renderer[class] {
  6060.  
  6061.                   overflow: visible !important;
  6062.                   min-width: max-content !important;
  6063.                   max-width: max-content !important;
  6064.                   max-height: max-content !important;
  6065.                   min-height: max-content !important;
  6066.                   white-space: nowrap;
  6067.               }
  6068.  
  6069.             */
  6070.             if (FIX_MENU_POSITION_N_SIZING_ON_SHOWN && typeof cProto.position === 'function' && !cProto.position34 && typeof cProto.refit === 'function') {
  6071.  
  6072.               let m34 = 0;
  6073.               cProto.__refitByPosition__ = function () {
  6074.                 m34++;
  6075.                 if (m34 <= 0) m34 = 0;
  6076.                 if (m34 !== 1) return;
  6077.                 const hostElement = this.hostElement || this;
  6078.                 if (document.visibilityState === 'visible') {
  6079.                   const sizingTarget = this.sizingTarget;
  6080.                   if (!sizingTarget) {
  6081.                     m34 = 0;
  6082.                     return;
  6083.                   }
  6084.  
  6085.                   let useVisibilityCollapse = true;
  6086.                   if (HTMLElement.prototype.querySelector.call(sizingTarget, 'yt-icon:empty')) {
  6087.                     useVisibilityCollapse = false;
  6088.                   }
  6089.  
  6090.                   if (useVisibilityCollapse) {
  6091.                     hostElement.style.visibility = 'collapse';
  6092.                     sizingTarget.style.visibility = 'collapse';
  6093.                   } else {
  6094.                     hostElement.setAttribute('rNgzQ', '');
  6095.                     sizingTarget.setAttribute('rNgzQ', '');
  6096.                   }
  6097.  
  6098.                   const gn = () => {
  6099.  
  6100.                     if (useVisibilityCollapse) {
  6101.                       hostElement.style.visibility = '';
  6102.                       sizingTarget.style.visibility = '';
  6103.                     } else {
  6104.                       hostElement.removeAttribute('rNgzQ');
  6105.                       sizingTarget.removeAttribute('rNgzQ');
  6106.                     }
  6107.                   }
  6108.  
  6109.                   const an = async () => {
  6110.                     while (m34 >= 1) {
  6111.                       await renderReadyPn(sizingTarget);
  6112.                       if (this.opened && this.isAttached && sizingTarget.isConnected === true && sizingTarget === this.sizingTarget) {
  6113.                         if (sizingTarget.matches('ytd-menu-popup-renderer[slot="dropdown-content"].yt-live-chat-app')) this.refit();
  6114.                       }
  6115.                       m34--;
  6116.                     }
  6117.                     m34 = 0;
  6118.                     Promise.resolve().then(gn);
  6119.                   }
  6120.                   setTimeout(an, 4); // wait those resizing function calls
  6121.  
  6122.  
  6123.                 } else {
  6124.                   m34 = 0;
  6125.                 }
  6126.               }
  6127.               cProto.position34 = cProto.position
  6128.               cProto.position = function () {
  6129.                 if (this._positionInitialize_) {
  6130.                   this._positionInitialize_ = 0;
  6131.                   this.__refitByPosition__();
  6132.                 }
  6133.                 let r = cProto.position34.apply(this, arguments);
  6134.                 return r;
  6135.               }
  6136.               console.log("FIX_MENU_POSITION_ON_SHOWN - OK");
  6137.  
  6138.             } else {
  6139.  
  6140.               console.log("FIX_MENU_POSITION_ON_SHOWN - NG");
  6141.  
  6142.             }
  6143.  
  6144.  
  6145.  
  6146.             cProto.__openedChanged = function () {
  6147.               this._positionInitialize_ = 1;
  6148.               // this.removeAttribute('horizontal-align')
  6149.               // this.removeAttribute('vertical-align')
  6150.               if (typeof this.__menuTypeCheck__ !== 'boolean') {
  6151.                 this.__menuTypeCheck__ = true;
  6152.                 if (CHAT_MENU_SCROLL_UNLOCKING) {
  6153.                   this._modifiedMenuPropOn062__ = false;
  6154.                   // console.log(513, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6155.                   // this.autoFitOnAttach = true;
  6156.                   // this.expandSizingTargetForScrollbars = true;
  6157.                   // this.allowOutsideScroll = true;
  6158.                   // console.log(519,Object.getOwnPropertyDescriptors(this.constructor.prototype))
  6159.                   this.__modifiedMenuPropsFn__();
  6160.                   // this.constrain= function(){}
  6161.                   // this.position= function(){}
  6162.  
  6163.                   // this.autoFitOnAttach = true;
  6164.                   // this.expandSizingTargetForScrollbars = true;
  6165.                   // this.allowOutsideScroll = true;
  6166.                 }
  6167.               }
  6168.               if (CHAT_MENU_SCROLL_UNLOCKING && this.opened) {
  6169.                 let newValue = null;
  6170.                 const positionTarget = this.positionTarget;
  6171.                 if (positionTarget && positionTarget.classList.contains('yt-live-chat-text-message-renderer')) {
  6172.                   if (this._modifiedMenuPropOn062__ === false) {
  6173.                     newValue = true;
  6174.                   }
  6175.                 } else if (this._modifiedMenuPropOn062__ === true) {
  6176.                   newValue = false;
  6177.                 }
  6178.                 if (newValue !== null) {
  6179.                   const beforeAllowOutsideScroll = this.allowOutsideScroll;
  6180.                   this._modifiedMenuPropOn062__ = newValue;
  6181.                   const afterAllowOutsideScroll = this.allowOutsideScroll;
  6182.                   if (beforeAllowOutsideScroll !== afterAllowOutsideScroll) this.__AllowOutsideScrollPD__.set.call(this, afterAllowOutsideScroll);
  6183.                 }
  6184.               }
  6185.  
  6186.               if (this.opened) {
  6187.  
  6188.                 Promise.resolve().then(() => {
  6189.  
  6190.                   this._prepareRenderOpened();
  6191.                 }).then(() => {
  6192.                   this._manager.addOverlay(this);
  6193.                   if (this._manager._overlays.length === 1) {
  6194.                     lastOpen = this;
  6195.                     lastClose = null;
  6196.                   } else {
  6197.                     return 1;
  6198.                   }
  6199.                   // if (cid) {
  6200.                   //   clearTimeout(cid);
  6201.                   //   cid = -1;
  6202.                   //   this.__moChanged__();
  6203.                   //   cid = 0;
  6204.                   // } else {
  6205.                   //   cid = -1;
  6206.                   //   this.__moChanged__();
  6207.                   //   cid = 0;
  6208.                   // }
  6209.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6210.                   // console.log(580, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6211.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6212.                   cid = cid || requestAnimationFrame(__moChanged__);
  6213.                 }).then((r) => {
  6214.  
  6215.                   if (r) this.__mtChanged__(1);
  6216.                 }).catch(console.warn);
  6217.  
  6218.               } else {
  6219.                 Promise.resolve().then(() => {
  6220.                   this._manager.removeOverlay(this);
  6221.                   if (this._manager._overlays.length === 0) {
  6222.                     lastClose = this;
  6223.                     lastOpen = null;
  6224.                   } else {
  6225.                     return 1;
  6226.                   }
  6227.                   // cid = cid > 0 ? clearTimeout(cid) : 0;
  6228.                   // console.log(581, this.positionTarget && this.positionTarget.classList.contains('yt-live-chat-text-message-renderer'))
  6229.                   // cid = cid || setTimeout(__moChanged__, delay1);
  6230.                   cid = cid || requestAnimationFrame(__moChanged__);
  6231.                 }).then((r) => {
  6232.                   if (r) this.__mtChanged__(0);
  6233.                 }).catch(console.warn);
  6234.  
  6235.               }
  6236.  
  6237.             }
  6238.             console.log("BOOST_MENU_OPENCHANGED_RENDERING - OK");
  6239.  
  6240.           } else {
  6241.  
  6242.             assertor(() => fnIntegrity(cProto.__openedChanged, '0.46.20'));
  6243.             console.log("FIX_MENU_REOPEN_RENDER_PERFORMANC_1 - NG");
  6244.  
  6245.           }
  6246.  
  6247.  
  6248.           if (FIX_CLICKING_MESSAGE_MENU_DISPLAY_ON_MOUSE_CLICK && typeof cProto.__openedChanged === 'function' && !cProto.__openedChanged82) {
  6249.  
  6250.             cProto.__openedChanged82 = cProto.__openedChanged;
  6251.  
  6252.  
  6253.             cProto.__openedChanged = function () {
  6254.  
  6255.               // currentMenuPivotWR = null;
  6256.               // console.log(1480, '__openedChanged.A', this.positionTarget)
  6257.  
  6258.  
  6259.  
  6260.               // if (this.opened && this.positionTarget) {
  6261.  
  6262.               //   const positionTarget = this.positionTarget;
  6263.               //   console.log(1480, '__openedChanged.B', positionTarget)
  6264.               //   currentMenuPivotWR = mWeakRef(positionTarget);
  6265.  
  6266.               // }
  6267.  
  6268.               const positionTarget = this.positionTarget;
  6269.               currentMenuPivotWR = positionTarget ? mWeakRef(positionTarget) : null;
  6270.               return this.__openedChanged82.apply(this, arguments);
  6271.             }
  6272.           }
  6273.  
  6274.  
  6275.           // if(FIX_MENU_CAPTURE_SCROLL && typeof cProto.__onCaptureScroll === 'function' && !cProto.__onCaptureScroll66){
  6276.  
  6277.           //   cProto.__onCaptureScroll66 = cProto.__onCaptureScroll;
  6278.  
  6279.           //   cProto.__onCaptureScroll = function(a){
  6280.  
  6281.           //     const q = true;
  6282.           //     if(this.scrollAction === 'lock'  && q && this.opened){
  6283.  
  6284.           //       // console.log(9107, this.scrollAction, this.__isAnimating, this.opened, a); // lock; __isAnimating = false
  6285.           //       async function af() {
  6286.           //         this.__isAnimating && this._finishRenderOpened();
  6287.           //         if (!this.opened) return;
  6288.           //         this.__restoreScrollPosition();
  6289.           //         await new Promise(r => requestAnimationFrame(r));
  6290.           //         if (!this.opened) return;
  6291.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6292.           //         if (!this.opened) return;
  6293.           //         this.__restoreScrollPosition();
  6294.           //         await new Promise(r => requestAnimationFrame(r));
  6295.           //         if (!this.opened) return;
  6296.           //         this.opened && this.__isAnimating && this._finishRenderOpened();
  6297.           //         if (!this.opened) return;
  6298.           //         this.opened && !this.__isAnimating && this.refit();
  6299.           //       }
  6300.           //       Promise.resolve().then(af);
  6301.  
  6302.           //        return cProto.__onCaptureScroll66.apply(this, arguments);
  6303.           //     }else{
  6304.  
  6305.           //       // console.log(9102, this.scrollAction, this.__isAnimating, this.opened, a); // lock
  6306.  
  6307.           //       return cProto.__onCaptureScroll66.apply(this, arguments);
  6308.           //     }
  6309.           //   }
  6310.           //   console.log("FIX_MENU_CAPTURE_SCROLL - OK");
  6311.           // }else{
  6312.           //   console.log("FIX_MENU_CAPTURE_SCROLL - NG");
  6313.  
  6314.           // }
  6315.  
  6316.  
  6317.         })();
  6318.  
  6319.         console.log("[End]");
  6320.  
  6321.         console.groupEnd();
  6322.  
  6323.       }).catch(console.warn);
  6324.  
  6325.  
  6326.     }
  6327.  
  6328.  
  6329.  
  6330.  
  6331.     promiseForCustomYtElementsReady.then(onRegistryReadyForDOMOperations);
  6332.  
  6333.     const fixJsonParse = () => {
  6334.  
  6335.  
  6336.  
  6337.       if (jsonParseFix && typeof JSON.parse === 'function' && !JSON.parse68) {
  6338.  
  6339.         let { _parse, _JSON } = jsonParseFix;
  6340.  
  6341.  
  6342.         let error = 0;
  6343.         try {
  6344.           _parse.apply(JSON, ["{}"])
  6345.           _JSON = JSON;
  6346.         } catch (e) {
  6347.           error = 1;
  6348.         }
  6349.         if (error === 1) {
  6350.  
  6351.           try {
  6352.             _parse.apply(_JSON, ["{}"])
  6353.           } catch (e) {
  6354.             error = 2;
  6355.           }
  6356.           if (error === 2) {
  6357.             return;
  6358.           }
  6359.         }
  6360.  
  6361.  
  6362.         JSON.parse68 = JSON.parse;
  6363.  
  6364.         JSON.parse = function parse(a, b) {
  6365.           const stack = (new Error()).stack;
  6366.           if (stack.includes('.readyStateChangeHandler_')) return _parse.apply(_JSON, arguments);
  6367.           return this.parse68(...arguments);
  6368.         };
  6369.  
  6370.         JSON.parse.toString = function () {
  6371.           return JSON.parse68.toString();
  6372.         };
  6373.  
  6374.         jsonParseFix = null;
  6375.  
  6376.       }
  6377.  
  6378.     }
  6379.  
  6380.     if (DE_JSONPRUNE_FOR_readyStateChangeHandler_) {
  6381.       promiseForCustomYtElementsReady.then(fixJsonParse);
  6382.       fixJsonParse();
  6383.     }
  6384.  
  6385.   });
  6386.  
  6387.  
  6388.  
  6389. })({ IntersectionObserver });