☰

YouTube JS Engine Tamer

To enhance YouTube performance by modifying YouTube JS Engine

当前为 2023-09-01 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        YouTube JS Engine Tamer
  3. // @namespace   UserScripts
  4. // @match       https://www.youtube.com/*
  5. // @version     0.4.6
  6. // @license     MIT
  7. // @author      CY Fung
  8. // @icon        https://github.com/cyfung1031/userscript-supports/raw/main/icons/yt-engine.png
  9. // @description To enhance YouTube performance by modifying YouTube JS Engine
  10. // @grant       none
  11. // @run-at      document-start
  12. // @unwrap
  13. // @inject-into page
  14. // @allFrames   true
  15. // ==/UserScript==
  16.  
  17. (() => {
  18.  
  19.   const NATIVE_CANVAS_ANIMATION = true; // for #cinematics
  20.   const FIX_schedulerInstanceInstance_ = true;
  21.   const FIX_yt_player = true;
  22.   const FIX_Animation_n_timeline = true;
  23.   const NO_PRELOAD_GENERATE_204 = false;
  24.   const CHANGE_appendChild = true;
  25.  
  26.   const FIX_error_many_stack = true; // should be a bug caused by uBlock Origin
  27.   // const FIX_error_many_stack_keepAliveDuration = 200; // ms
  28.   // const FIX_error_many_stack_keepAliveDuration_check_if_n_larger_than = 8;
  29.  
  30.   /*
  31.   window.addEventListener('edm',()=>{
  32.     let p = [...this.onerror.errorTokens][0].token; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  33.   });
  34.  
  35.   window.addEventListener('edn',()=>{
  36.     let p = [...this.onerror.errorTokens][0].token+"X"; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  37.   });
  38.   window.addEventListener('edr',()=>{
  39.     let p = '123'; (()=>{ console.log(p); throw new Error(p);console.log(334,p) })()
  40.   });
  41. */
  42.  
  43.  
  44.   const prepareLogs = [];
  45.  
  46.   const skipAdsDetection = new Set(['/robots.txt', '/live_chat', '/live_chat_replay']);
  47.  
  48.   let winError00 = window.onerror;
  49.  
  50.   let fix_error_many_stack_state = !FIX_error_many_stack ? 0 : skipAdsDetection.has(location.pathname) ? 2 : 1;
  51.  
  52.  
  53.   ; fix_error_many_stack_state === 2 && (() => {
  54.  
  55.  
  56.     let p1 = winError00;
  57.  
  58.     let objectPrune = null;
  59.     let stackNeedleDetails = null;
  60.  
  61.     Object.defineProperty(Function.prototype, 'findOwner', {
  62.       get() {
  63.         objectPrune = this;
  64.         return this._findOwner;
  65.       },
  66.       set(nv) {
  67.         this._findOwner = nv;
  68.         return true;
  69.       },
  70.       enumerable: true,
  71.       configurable: true
  72.     });
  73.  
  74.     Object.defineProperty(Object.prototype, 'matchAll', {
  75.       get() {
  76.         stackNeedleDetails = this;
  77.         return true;
  78.       },
  79.       enumerable: true,
  80.       configurable: true
  81.     });
  82.  
  83.     try {
  84.       JSON.parse("{}");
  85.     } catch (e) {
  86.       console.warn(e)
  87.       fix_error_many_stack_state = 0;
  88.     }
  89.  
  90.     delete Function.prototype['findOwner'];
  91.     delete Object.prototype['matchAll'];
  92.  
  93.     let p2 = window.onerror;
  94.  
  95.     if (p1 !== p2) fix_error_many_stack_state = 0;
  96.  
  97.     if (fix_error_many_stack_state === 0) return;
  98.  
  99.     // the following will only execute when Brave's scriptlets.js is executed.
  100.  
  101.     prepareLogs.push("fix_error_many_stack_state NB")
  102.  
  103.     if (stackNeedleDetails) {
  104.       stackNeedleDetails.pattern = null;
  105.       stackNeedleDetails.re = null;
  106.       stackNeedleDetails.expect = null;
  107.       stackNeedleDetails.matchAll = true;
  108.     }
  109.  
  110.     if (objectPrune) {
  111.       objectPrune.findOwner = objectPrune.mustProcess = objectPrune.logJson = () => { }
  112.       delete objectPrune._findOwner;
  113.     }
  114.  
  115.  
  116.     JSON.parseProxy = JSON.parse;
  117.  
  118.  
  119.  
  120.     fix_error_many_stack_state = 1;
  121.  
  122.  
  123.  
  124.   })();
  125.  
  126.   ; fix_error_many_stack_state === 1 && (() => {
  127.  
  128.  
  129.     let p1 = winError00;
  130.  
  131.     try {
  132.       JSON.parse("{}");
  133.     } catch (e) {
  134.       console.warn(e)
  135.       fix_error_many_stack_state = 0;
  136.     }
  137.  
  138.     let p2 = window.onerror;
  139.  
  140.     if (p1 === p2) return;
  141.  
  142.     window.onerror = p1;
  143.  
  144.     if (fix_error_many_stack_state === 0) return;
  145.  
  146.     // the following will only execute when Brave's scriptlets.js is executed.
  147.  
  148.     prepareLogs.push("fix_error_many_stack_state AB")
  149.  
  150.     JSON.parseProxy = JSON.parse;
  151.  
  152.     JSON.parse = ((parse) => {
  153.  
  154.       parse = parse.bind(JSON); // get a new instance of the current JSON.parse
  155.       return function (text, reviver) {
  156.         const onerror = window.onerror;
  157.         window.onerror = null;
  158.         let r;
  159.         try {
  160.           r = parse(...arguments);
  161.         } catch (e) {
  162.           r = e;
  163.         }
  164.         window.onerror = onerror;
  165.         if (r instanceof Error) {
  166.           throw r;
  167.         }
  168.         return r;
  169.       }
  170.  
  171.     })(JSON.parse);
  172.  
  173.  
  174.   })();
  175.  
  176.  
  177.  
  178.   // ================================================ 0.4.5 ================================================
  179.  
  180.  
  181.   // ; (() => {
  182.  
  183.   //   if (FIX_error_many_stack && self instanceof Window) {
  184.   //     // infinite stack due to matchesStackTrace inside objectPrune of AdsBlock
  185.  
  186.   //     const pdK = Object.getOwnPropertyDescriptor(window, 'onerror');
  187.   //     if (!pdK || (pdK.get && pdK.configurable)) {
  188.  
  189.   //     } else {
  190.   //       return;
  191.   //     }
  192.  
  193.   //     let unsupportErrorFix = false;
  194.  
  195.   //     let firstHook = true;
  196.   //     let busy33 = false;
  197.  
  198.   //     let state = 0;
  199.  
  200.   //     if (pdK) {
  201.   //       delete window['onerror'];
  202.   //     }
  203.  
  204.   //     const pd = {
  205.   //       get() {
  206.   //         const stack = (new Error()).stack;
  207.   //         // targetStack = stack;
  208.   //         let isGetExceptionToken = stack.indexOf('getExceptionToken') >= 0;
  209.   //         state = isGetExceptionToken ? 1 : 0;
  210.   //         delete Window.prototype['onerror'];
  211.   //         let r = pdK ? pdK.get.call(this) : this.onerror;
  212.   //         Object.defineProperty(Window.prototype, 'onerror', pd);
  213.   //         //        console.log('onerror get', r)
  214.   //         return r;
  215.   //       },
  216.   //       set(nv) {
  217.   //         const stack = (new Error()).stack;
  218.   //         let isGetExceptionToken = stack.indexOf('getExceptionToken') >= 0;
  219.   //         state = state === 1 && isGetExceptionToken ? 2 : 0;
  220.   //         /** @type {string?} */
  221.   //         let sToken = null;
  222.   //         if (unsupportErrorFix || busy33) {
  223.  
  224.   //         } else if (typeof nv === 'function' && state === 2) {
  225.   //           if (firstHook) {
  226.   //             firstHook = false;
  227.   //             console.groupCollapsed('Infinite onerror Bug Found');
  228.   //             console.log(location.href);
  229.   //             console.log(stack);
  230.   //             console.log(nv);
  231.   //             console.groupEnd();
  232.   //           }
  233.   //           let _token = null;
  234.   //           busy33 = true;
  235.   //           String.prototype.includes76 = String.prototype.includes;
  236.   //           String.prototype.includes = function (token) {
  237.   //             _token = token;
  238.   //             return true;
  239.   //           }
  240.   //           nv('token');
  241.   //           String.prototype.includes = String.prototype.includes76;
  242.   //           sToken = _token;
  243.   //           busy33 = false;
  244.   //           if (typeof sToken !== 'string') {
  245.   //             unsupportErrorFix = true;
  246.   //           }
  247.   //         }
  248.   //         delete Window.prototype['onerror'];
  249.   //         if (typeof sToken === 'string' && sToken.length > 1) {
  250.   //           /** @type {string} */
  251.   //           const token = sToken;
  252.   //           /** @type {OnErrorEventHandler & {errorTokens: Set<string>?} } */
  253.   //           const currentOnerror = pdK ? pdK.get.call(this) : this.onerror;
  254.  
  255.   //           const now = Date.now();
  256.   //           const tokenEntry = {
  257.   //             token,
  258.   //             expired: now + FIX_error_many_stack_keepAliveDuration
  259.   //           }
  260.   //           /** @typedef {typeof tokenEntry} TokenEntry */
  261.  
  262.   //           /** @type {Set<TokenEntry>} */
  263.   //           const errorTokens = currentOnerror.errorTokens;
  264.  
  265.   //           if (errorTokens) {
  266.   //             if (errorTokens.size > FIX_error_many_stack_keepAliveDuration_check_if_n_larger_than) {
  267.   //               for (const entry of errorTokens) {
  268.   //                 if (entry.expired < now) {
  269.   //                   errorTokens.delete(entry);
  270.   //                 }
  271.   //               }
  272.   //             }
  273.   //             errorTokens.add(tokenEntry)
  274.   //           } else {
  275.   //             /** @type {Set<TokenEntry>} */
  276.   //             const errorTokens = new Set([tokenEntry]);
  277.   //             /** @type {OnErrorEventHandler & {errorTokens: Set<string>} } */
  278.   //             const newOnerror = ((oe) => {
  279.   //               const r = function (msg, ...args) {
  280.   //                 if (typeof msg === 'string' && errorTokens.size > 0) {
  281.   //                   for (const entry of errorTokens) {
  282.   //                     if (msg.includes(entry.token)) return true;
  283.   //                   }
  284.   //                 }
  285.   //                 if (typeof oe === 'function') {
  286.   //                   return oe.apply(this, arguments);
  287.   //                 }
  288.   //               };
  289.   //               r.errorTokens = errorTokens;
  290.   //               return r;
  291.   //             })(currentOnerror);
  292.  
  293.   //             if (pdK && pdK.set) pdK.set.call(this, newOnerror);
  294.   //             else this.onerror = newOnerror;
  295.   //           }
  296.   //         } else {
  297.   //           if (pdK && pdK.set) pdK.set.call(this, nv);
  298.   //           else this.onerror = nv;
  299.   //         }
  300.   //         Object.defineProperty(Window.prototype, 'onerror', pd);
  301.  
  302.   //         // console.log('onerror set', nv)
  303.   //         return true;
  304.   //       },
  305.   //       enumerable: true,
  306.   //       configurable: true
  307.   //     }
  308.  
  309.   //     Object.defineProperty(Window.prototype, 'onerror', pd);
  310.  
  311.  
  312.   //   }
  313.  
  314.  
  315.   // })();
  316.  
  317.  
  318.  
  319.   // ================================================ 0.4.5 ================================================
  320.  
  321.  
  322.   // << if FIX_yt_player >>
  323.  
  324.   // credit to @nopeless (https://greasyfork.org/scripts/471489-youtube-player-perf/)
  325.   const PERF_471489_ = true;
  326.   // PERF_471489_ is not exactly the same to Youtube Player perf v0.7
  327.   // This script uses a much gentle way to tamer the JS engine instead.
  328.  
  329.   // << end >>
  330.  
  331.   const steppingScaleN = 200; // transform: scaleX(k/N); 0<k<N
  332.  
  333.   const Promise = (async () => { })().constructor;
  334.  
  335.   let isMainWindow = false;
  336.   try {
  337.     isMainWindow = window.document === window.top.document
  338.   } catch (e) { }
  339.  
  340.   let NO_PRELOAD_GENERATE_204_BYPASS = NO_PRELOAD_GENERATE_204 ? false : true;
  341.  
  342.   const onRegistryReady = (callback) => {
  343.     if (typeof customElements === 'undefined') {
  344.       if (!('__CE_registry' in document)) {
  345.         // https://github.com/webcomponents/polyfills/
  346.         Object.defineProperty(document, '__CE_registry', {
  347.           get() {
  348.             // return undefined
  349.           },
  350.           set(nv) {
  351.             if (typeof nv == 'object') {
  352.               delete this.__CE_registry;
  353.               this.__CE_registry = nv;
  354.               this.dispatchEvent(new CustomEvent(EVENT_KEY_ON_REGISTRY_READY));
  355.             }
  356.             return true;
  357.           },
  358.           enumerable: false,
  359.           configurable: true
  360.         })
  361.       }
  362.       let eventHandler = (evt) => {
  363.         document.removeEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  364.         const f = callback;
  365.         callback = null;
  366.         eventHandler = null;
  367.         f();
  368.       };
  369.       document.addEventListener(EVENT_KEY_ON_REGISTRY_READY, eventHandler, false);
  370.     } else {
  371.       callback();
  372.     }
  373.   };
  374.  
  375.   const getZq = (_yt_player) => {
  376.  
  377.     const w = 'Zq';
  378.  
  379.     let arr = [];
  380.  
  381.     for (const [k, v] of Object.entries(_yt_player)) {
  382.  
  383.       const p = typeof v === 'function' ? v.prototype : 0;
  384.       if (p
  385.         && typeof p.start === 'function' && p.start.length === 0
  386.         && typeof p.isActive === 'function' && p.isActive.length === 0
  387.         && typeof p.stop === 'function' && p.stop.length === 0
  388.         && !p.isComplete && !p.getStatus && !p.getResponseHeader && !p.getLastError
  389.         && !p.send && !p.abort
  390.         && !p.sample && !p.initialize && !p.fail && !p.getName
  391.         // && !p.dispose && !p.isDisposed
  392.  
  393.       ) {
  394.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  395.  
  396.  
  397.       }
  398.  
  399.     }
  400.  
  401.     if (arr.length === 0) {
  402.  
  403.       console.warn(`Key does not exist. [${w}]`);
  404.     } else {
  405.  
  406.       console.log(`[${w}]`, arr);
  407.       return arr[0];
  408.     }
  409.  
  410.  
  411.  
  412.  
  413.   }
  414.  
  415.  
  416.   const getVG = (_yt_player) => {
  417.     const w = 'VG';
  418.  
  419.     let arr = [];
  420.  
  421.     for (const [k, v] of Object.entries(_yt_player)) {
  422.  
  423.       const p = typeof v === 'function' ? v.prototype : 0;
  424.       if (p
  425.         && typeof p.show === 'function' && p.show.length === 1
  426.         && typeof p.hide === 'function' && p.hide.length === 0
  427.         && typeof p.stop === 'function' && p.stop.length === 0) {
  428.  
  429.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  430.  
  431.       }
  432.  
  433.     }
  434.  
  435.  
  436.     if (arr.length === 0) {
  437.  
  438.       console.warn(`Key does not exist. [${w}]`);
  439.     } else {
  440.  
  441.       console.log(`[${w}]`, arr);
  442.       return arr[0];
  443.     }
  444.  
  445.  
  446.  
  447.   }
  448.  
  449.  
  450.   const getzo = (_yt_player) => {
  451.     const w = 'zo';
  452.  
  453.     let arr = [];
  454.  
  455.     for (const [k, v] of Object.entries(_yt_player)) {
  456.  
  457.       if (
  458.         typeof v === 'function' && v.length === 3 && k.length < 3
  459.         && (v + "").includes("a.style[b]=c")
  460.       ) {
  461.  
  462.         arr.push(k);
  463.  
  464.       }
  465.  
  466.     }
  467.  
  468.  
  469.     if (arr.length === 0) {
  470.  
  471.       console.warn(`Key does not exist. [${w}]`);
  472.     } else {
  473.  
  474.       console.log(`[${w}]`, arr);
  475.       return arr[0];
  476.     }
  477.  
  478.   }
  479.  
  480.   const addProtoToArr = (parent, key, arr) => {
  481.  
  482.  
  483.     let isChildProto = false;
  484.     for (const sr of arr) {
  485.       if (parent[key].prototype instanceof parent[sr]) {
  486.         isChildProto = true;
  487.         break;
  488.       }
  489.     }
  490.  
  491.     if (isChildProto) return;
  492.  
  493.     arr = arr.filter(sr => {
  494.       if (parent[sr].prototype instanceof parent[key]) {
  495.         return false;
  496.       }
  497.       return true;
  498.     });
  499.  
  500.     arr.push(key);
  501.  
  502.     return arr;
  503.  
  504.  
  505.   }
  506.  
  507.   const getuG = (_yt_player) => {
  508.  
  509.     const w = 'uG';
  510.  
  511.     let arr = [];
  512.  
  513.     for (const [k, v] of Object.entries(_yt_player)) {
  514.  
  515.  
  516.       const p = typeof v === 'function' ? v.prototype : 0;
  517.  
  518.       if (p
  519.         && typeof p.createElement === 'function' && p.createElement.length === 2
  520.         && typeof p.detach === 'function' && p.detach.length === 0
  521.         && typeof p.update === 'function' && p.update.length === 1
  522.         && typeof p.updateValue === 'function' && p.updateValue.length === 2
  523.       ) {
  524.  
  525.         arr = addProtoToArr(_yt_player, k, arr) || arr;
  526.  
  527.       }
  528.  
  529.     }
  530.  
  531.  
  532.  
  533.  
  534.  
  535.     if (arr.length === 0) {
  536.  
  537.       console.warn(`Key does not exist. [${w}]`);
  538.     } else {
  539.  
  540.       console.log(`[${w}]`, arr);
  541.       return arr[0];
  542.     }
  543.  
  544.   }
  545.  
  546.  
  547.  
  548.   // << if FIX_schedulerInstanceInstance_ >>
  549.  
  550.   let idleFrom = Date.now() + 2700;
  551.   let slowMode = false;
  552.  
  553.   let ytEvented = false;
  554.  
  555.  
  556.   function setupEvents() {
  557.  
  558.     document.addEventListener('yt-navigate', () => {
  559.  
  560.       ytEvented = true;
  561.       slowMode = false;
  562.       idleFrom = Date.now() + 2700;
  563.  
  564.     });
  565.     document.addEventListener('yt-navigate-start', () => {
  566.  
  567.       ytEvented = true;
  568.       slowMode = false;
  569.       idleFrom = Date.now() + 2700;
  570.  
  571.     });
  572.  
  573.     document.addEventListener('yt-page-type-changed', () => {
  574.  
  575.       ytEvented = true;
  576.       slowMode = false;
  577.       idleFrom = Date.now() + 1700;
  578.  
  579.     });
  580.  
  581.  
  582.     document.addEventListener('yt-player-updated', () => {
  583.  
  584.       ytEvented = true;
  585.       slowMode = false;
  586.       idleFrom = Date.now() + 1700;
  587.  
  588.     });
  589.  
  590.  
  591.     document.addEventListener('yt-page-data-fetched', () => {
  592.  
  593.       ytEvented = true;
  594.       slowMode = false;
  595.       idleFrom = Date.now() + 1700;
  596.  
  597.     });
  598.  
  599.     document.addEventListener('yt-navigate-finish', () => {
  600.  
  601.       ytEvented = true;
  602.       slowMode = false;
  603.       let t = Date.now() + 700;
  604.       if (t > idleFrom) idleFrom = t;
  605.  
  606.     });
  607.  
  608.     document.addEventListener('yt-page-data-updated', () => {
  609.  
  610.       ytEvented = true;
  611.       slowMode = false;
  612.       let t = Date.now() + 700;
  613.       if (t > idleFrom) idleFrom = t;
  614.  
  615.     });
  616.  
  617.     document.addEventListener('yt-watch-comments-ready', () => {
  618.  
  619.       ytEvented = true;
  620.       slowMode = false;
  621.       let t = Date.now() + 700;
  622.       if (t > idleFrom) idleFrom = t;
  623.  
  624.     });
  625.   }
  626.  
  627.  
  628.   // << end >>
  629.  
  630.   const cleanContext = async (win) => {
  631.     const waitFn = requestAnimationFrame; // shall have been binded to window
  632.     try {
  633.       let mx = 16; // MAX TRIAL
  634.       const frameId = 'vanillajs-iframe-v1';
  635.       /** @type {HTMLIFrameElement | null} */
  636.       let frame = document.getElementById(frameId);
  637.       let removeIframeFn = null;
  638.       if (!frame) {
  639.         frame = document.createElement('iframe');
  640.         frame.id = 'vanillajs-iframe-v1';
  641.         frame.sandbox = 'allow-same-origin'; // script cannot be run inside iframe but API can be obtained from iframe
  642.         let n = document.createElement('noscript'); // wrap into NOSCRPIT to avoid reflow (layouting)
  643.         n.appendChild(frame);
  644.         while (!document.documentElement && mx-- > 0) await new Promise(waitFn); // requestAnimationFrame here could get modified by YouTube engine
  645.         const root = document.documentElement;
  646.         root.appendChild(n); // throw error if root is null due to exceeding MAX TRIAL
  647.         removeIframeFn = (setTimeout) => {
  648.           const removeIframeOnDocumentReady = (e) => {
  649.             e && win.removeEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  650.             win = null;
  651.             setTimeout(() => {
  652.               n.remove();
  653.               n = null;
  654.             }, 200);
  655.           }
  656.           if (document.readyState !== 'loading') {
  657.             removeIframeOnDocumentReady();
  658.           } else {
  659.             win.addEventListener("DOMContentLoaded", removeIframeOnDocumentReady, false);
  660.           }
  661.         }
  662.       }
  663.       while (!frame.contentWindow && mx-- > 0) await new Promise(waitFn);
  664.       const fc = frame.contentWindow;
  665.       if (!fc) throw "window is not found."; // throw error if root is null due to exceeding MAX TRIAL
  666.       const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, requestIdleCallback, getComputedStyle } = fc;
  667.       const res = { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, requestIdleCallback, getComputedStyle };
  668.       for (let k in res) res[k] = res[k].bind(win); // necessary
  669.       if (removeIframeFn) Promise.resolve(res.setTimeout).then(removeIframeFn);
  670.       res.animate = fc.HTMLElement.prototype.animate;
  671.       return res;
  672.     } catch (e) {
  673.       console.warn(e);
  674.       return null;
  675.     }
  676.   };
  677.  
  678.  
  679.   const promiseForCustomYtElementsReady = new Promise(onRegistryReady);
  680.  
  681.   cleanContext(window).then(__CONTEXT__ => {
  682.     if (!__CONTEXT__) return null;
  683.  
  684.     const { requestAnimationFrame, setTimeout, cancelAnimationFrame, setInterval, clearInterval, animate, requestIdleCallback, getComputedStyle } = __CONTEXT__;
  685.  
  686.  
  687.  
  688.     let rafPromiseForTickers = null;
  689.  
  690.     const getRafPromiseForTickers = () => rafPromiseForTickers || (rafPromiseForTickers = new Promise(resolve => {
  691.       requestAnimationFrame(hRes => {
  692.         rafPromiseForTickers = null;
  693.         resolve(hRes);
  694.       });
  695.     }));
  696.  
  697.     const getForegroundPromise = () => {
  698.       if (document.visibilityState === 'visible') {
  699.         return Promise.resolve();
  700.       } else {
  701.         return getRafPromiseForTickers();
  702.       }
  703.     };
  704.  
  705.     NO_PRELOAD_GENERATE_204_BYPASS || promiseForCustomYtElementsReady.then(() => {
  706.       setTimeout(() => {
  707.         NO_PRELOAD_GENERATE_204_BYPASS = true;
  708.       }, 1270);
  709.     });
  710.  
  711.     const promiseForTamerTimeout = new Promise(resolve => {
  712.       promiseForCustomYtElementsReady.then(() => {
  713.         customElements.whenDefined('ytd-app').then(() => {
  714.           setTimeout(resolve, 1200);
  715.         });
  716.       });
  717.       setTimeout(resolve, 3000);
  718.     });
  719.  
  720.  
  721.     class RAFHub {
  722.       constructor() {
  723.         /** @type {number} */
  724.         this.startAt = 8170;
  725.         /** @type {number} */
  726.         this.counter = 0;
  727.         /** @type {number} */
  728.         this.rid = 0;
  729.         /** @type {Map<number, FrameRequestCallback>} */
  730.         this.funcs = new Map();
  731.         const funcs = this.funcs;
  732.         /** @type {FrameRequestCallback} */
  733.         this.bCallback = this.mCallback.bind(this);
  734.         this.pClear = () => funcs.clear();
  735.       }
  736.       /** @param {DOMHighResTimeStamp} highResTime */
  737.       mCallback(highResTime) {
  738.         this.rid = 0;
  739.         Promise.resolve().then(this.pClear);
  740.         this.funcs.forEach(func => Promise.resolve(highResTime).then(func).catch(console.warn));
  741.       }
  742.       /** @param {FrameRequestCallback} f */
  743.       request(f) {
  744.         if (this.counter > 1e9) this.counter = 9;
  745.         let cid = this.startAt + (++this.counter);
  746.         this.funcs.set(cid, f);
  747.         if (this.rid === 0) this.rid = requestAnimationFrame(this.bCallback);
  748.         return cid;
  749.       }
  750.       /** @param {number} cid */
  751.       cancel(cid) {
  752.         cid = +cid;
  753.         if (cid > 0) {
  754.           if (cid <= this.startAt) {
  755.             return cancelAnimationFrame(cid);
  756.           }
  757.           if (this.rid > 0) {
  758.             this.funcs.delete(cid);
  759.             if (this.funcs.size === 0) {
  760.               cancelAnimationFrame(this.rid);
  761.               this.rid = 0;
  762.             }
  763.           }
  764.         }
  765.       }
  766.     }
  767.  
  768.  
  769.  
  770.     NATIVE_CANVAS_ANIMATION && (() => {
  771.  
  772.       HTMLCanvasElement.prototype.animate = animate;
  773.  
  774.       let cid = setInterval(() => {
  775.         HTMLCanvasElement.prototype.animate = animate;
  776.       }, 1);
  777.  
  778.       promiseForTamerTimeout.then(() => {
  779.         clearInterval(cid)
  780.       });
  781.  
  782.     })();
  783.  
  784.     CHANGE_appendChild && (() => {
  785.  
  786.       HTMLElement.prototype.appendChild73 = HTMLElement.prototype.appendChild;
  787.       HTMLElement.prototype.appendChild = function (a) {
  788.         if (!NO_PRELOAD_GENERATE_204_BYPASS && document.head === this) {
  789.           for (let node = this.firstElementChild; node instanceof HTMLElement; node = node.nextElementSibling) {
  790.             if (node.nodeName === 'LINK' && node.rel === 'preload' && node.as === 'fetch' && !node.__m848__) {
  791.               node.__m848__ = 1;
  792.               node.rel = 'prefetch'; // see https://github.com/GoogleChromeLabs/quicklink
  793.             }
  794.           }
  795.         }
  796.         if (a instanceof DocumentFragment) {
  797.           if (a.firstElementChild === null) return a;
  798.         }
  799.         return this.appendChild73.apply(this, arguments)
  800.       }
  801.  
  802.  
  803.     })();
  804.  
  805.  
  806.     FIX_schedulerInstanceInstance_ && (async () => {
  807.  
  808.  
  809.       const schedulerInstanceInstance_ = await new Promise(resolve => {
  810.  
  811.         let cid = setInterval(() => {
  812.           let t = (((window || 0).ytglobal || 0).schedulerInstanceInstance_ || 0);
  813.           if (t) {
  814.  
  815.             clearInterval(cid);
  816.             resolve(t);
  817.           }
  818.         }, 1);
  819.         promiseForTamerTimeout.then(() => {
  820.           resolve(null)
  821.         });
  822.       });
  823.  
  824.       if (!schedulerInstanceInstance_) return;
  825.  
  826.  
  827.       if (!ytEvented) {
  828.         idleFrom = Date.now() + 2700;
  829.         slowMode = false; // integrity
  830.       }
  831.  
  832.       const checkOK = typeof schedulerInstanceInstance_.start === 'function' && !schedulerInstanceInstance_.start991 && !schedulerInstanceInstance_.stop && !schedulerInstanceInstance_.cancel && !schedulerInstanceInstance_.terminate && !schedulerInstanceInstance_.interupt;
  833.       if (checkOK) {
  834.  
  835.         schedulerInstanceInstance_.start991 = schedulerInstanceInstance_.start;
  836.  
  837.         let requestingFn = null;
  838.         let requestingArgs = null;
  839.         let requestingDT = 0;
  840.  
  841.         // let timerId = null;
  842.         const entries = [];
  843.         const f = function () {
  844.           requestingFn = this.fn;
  845.           requestingArgs = [...arguments];
  846.           requestingDT = Date.now();
  847.           entries.push({
  848.             fn: requestingFn,
  849.             args: requestingArgs,
  850.             t: requestingDT
  851.           });
  852.           // if (Date.now() < idleFrom) {
  853.           //   timerId = this.fn.apply(window, arguments);
  854.           // } else {
  855.           //   timerId = this.fn.apply(window, arguments);
  856.  
  857.           // }
  858.           // timerId = 12377;
  859.           return 12377;
  860.         }
  861.  
  862.  
  863.         const fakeFns = [
  864.           f.bind({ fn: requestAnimationFrame }),
  865.           f.bind({ fn: setInterval }),
  866.           f.bind({ fn: setTimeout }),
  867.           f.bind({ fn: requestIdleCallback })
  868.         ]
  869.  
  870.  
  871.  
  872.  
  873.         let timerResolve = null;
  874.         setInterval(() => {
  875.           timerResolve && timerResolve();
  876.           timerResolve = null;
  877.           if (!slowMode && Date.now() > idleFrom) slowMode = true;
  878.         }, 250);
  879.  
  880.         let mzt = 0;
  881.  
  882.         let fnSelectorProp = null;
  883.  
  884.         schedulerInstanceInstance_.start = function () {
  885.  
  886.           const mk1 = window.requestAnimationFrame
  887.           const mk2 = window.setInterval
  888.           const mk3 = window.setTimeout
  889.           const mk4 = window.requestIdleCallback
  890.  
  891.           const tThis = this['$$12378$$'] || this;
  892.  
  893.  
  894.           window.requestAnimationFrame = fakeFns[0]
  895.           window.setInterval = fakeFns[1]
  896.           window.setTimeout = fakeFns[2]
  897.           window.requestIdleCallback = fakeFns[3]
  898.  
  899.           fnSelectorProp = null;
  900.  
  901.  
  902.           tThis.start991.call(new Proxy(tThis, {
  903.             get(target, prop, receiver) {
  904.               if (prop === '$$12377$$') return true;
  905.               if (prop === '$$12378$$') return target;
  906.  
  907.               // console.log('get',prop)
  908.               return target[prop]
  909.             },
  910.             set(target, prop, value, receiver) {
  911.               // console.log('set', prop, value)
  912.  
  913.  
  914.               if (value >= 1 && value <= 4) fnSelectorProp = prop;
  915.               if (value === 12377 && fnSelectorProp) {
  916.  
  917.                 const originalSelection = target[fnSelectorProp];
  918.                 const timerIdProp = prop;
  919.  
  920.                 /*
  921.  
  922.  
  923.           case 1:
  924.               var a = this.K;
  925.               this.g = this.I ? window.requestIdleCallback(a, {
  926.                   timeout: 3E3
  927.               }) : window.setTimeout(a, ma);
  928.               break;
  929.           case 2:
  930.               this.g = window.setTimeout(this.M, this.N);
  931.               break;
  932.           case 3:
  933.               this.g = window.requestAnimationFrame(this.L);
  934.               break;
  935.           case 4:
  936.               this.g = window.setTimeout(this.J, 0)
  937.           }
  938.  
  939.           */
  940.  
  941.                 const doForegroundSlowMode = () => {
  942.  
  943.                   const tir = ++mzt;
  944.                   const f = requestingArgs[0];
  945.  
  946.  
  947.                   getForegroundPromise().then(() => {
  948.  
  949.  
  950.                     new Promise(r => {
  951.                       timerResolve = r
  952.                     }).then(() => {
  953.                       if (target[timerIdProp] === -tir) f();
  954.                     });
  955.  
  956.                   })
  957.  
  958.                   target[fnSelectorProp] = 931;
  959.                   target[prop] = -tir;
  960.                 }
  961.  
  962.                 if (target[fnSelectorProp] === 2 && requestingFn === setTimeout) {
  963.                   if (slowMode && !(requestingArgs[1] > 250)) {
  964.  
  965.                     doForegroundSlowMode();
  966.  
  967.                   } else {
  968.                     target[prop] = setTimeout.apply(window, requestingArgs);
  969.  
  970.                   }
  971.  
  972.                 } else if (target[fnSelectorProp] === 3 && requestingFn === requestAnimationFrame) {
  973.  
  974.                   if (slowMode) {
  975.  
  976.                     doForegroundSlowMode();
  977.  
  978.                   } else {
  979.                     target[prop] = requestAnimationFrame.apply(window, requestingArgs);
  980.                   }
  981.  
  982.  
  983.                 } else if (target[fnSelectorProp] === 4 && requestingFn === setTimeout && !requestingArgs[1]) {
  984.  
  985.                   const f = requestingArgs[0];
  986.                   const tir = ++mzt;
  987.                   Promise.resolve().then(() => {
  988.                     if (target[timerIdProp] === -tir) f();
  989.                   });
  990.                   target[fnSelectorProp] = 930;
  991.                   target[prop] = -tir;
  992.  
  993.                 } else if (target[fnSelectorProp] === 1 && (requestingFn === requestIdleCallback || requestingFn === setTimeout)) {
  994.  
  995.                   doForegroundSlowMode();
  996.  
  997.                 } else {
  998.                   // target[prop] = timerId;
  999.                   target[fnSelectorProp] = 0;
  1000.                   target[prop] = 0;
  1001.                 }
  1002.  
  1003.                 // *****
  1004.                 // console.log('[[set]]', slowMode , prop, value, `fnSelectorProp: ${originalSelection} -> ${target[fnSelectorProp]}`)
  1005.               } else {
  1006.  
  1007.                 target[prop] = value;
  1008.               }
  1009.               // console.log('set',prop,value)
  1010.               return true;
  1011.             }
  1012.           }));
  1013.  
  1014.           fnSelectorProp = null;
  1015.  
  1016.  
  1017.           window.requestAnimationFrame = mk1;
  1018.           window.setInterval = mk2
  1019.           window.setTimeout = mk3
  1020.           window.requestIdleCallback = mk4;
  1021.  
  1022.  
  1023.  
  1024.         }
  1025.  
  1026.         schedulerInstanceInstance_.start.toString = function () {
  1027.           return schedulerInstanceInstance_.start991.toString();
  1028.         }
  1029.  
  1030.         // const funcNames = [...(schedulerInstanceInstance_.start + "").matchAll(/[\(,]this\.(\w{1,2})[,\)]/g)].map(e => e[1]).map(prop => ({
  1031.         //   prop,
  1032.         //   value: schedulerInstanceInstance_[prop],
  1033.         //   type: typeof schedulerInstanceInstance_[prop]
  1034.  
  1035.         // }));
  1036.         // console.log('fcc', funcNames)
  1037.  
  1038.  
  1039.  
  1040.  
  1041.       }
  1042.     })();
  1043.  
  1044.  
  1045.     FIX_yt_player && (async () => {
  1046.  
  1047.  
  1048.  
  1049.       const rafHub = new RAFHub();
  1050.  
  1051.  
  1052.       const _yt_player = await new Promise(resolve => {
  1053.  
  1054.         let cid = setInterval(() => {
  1055.           let t = (((window || 0)._yt_player || 0) || 0);
  1056.           if (t) {
  1057.  
  1058.             clearInterval(cid);
  1059.             resolve(t);
  1060.           }
  1061.         }, 1);
  1062.  
  1063.         promiseForTamerTimeout.then(() => {
  1064.           resolve(null)
  1065.         });
  1066.  
  1067.       });
  1068.  
  1069.  
  1070.  
  1071.       if (!_yt_player || typeof _yt_player !== 'object') return;
  1072.  
  1073.  
  1074.  
  1075.       let keyZq = getZq(_yt_player);
  1076.       let keyVG = getVG(_yt_player);
  1077.       let buildVG = _yt_player[keyVG];
  1078.       let u = new buildVG({
  1079.         api: {},
  1080.         element: document.createElement('noscript'),
  1081.         api: {},
  1082.         hide: () => { }
  1083.       }, 250);
  1084.       const timeDelayConstructor = u.delay.constructor; // g.br
  1085.       // console.log(keyVG, u)
  1086.       // buildVG.prototype.show = function(){}
  1087.       // _yt_player[keyZq] = g.k
  1088.  
  1089.       if (!keyZq) return;
  1090.  
  1091.  
  1092.       const g = _yt_player
  1093.       let k = keyZq
  1094.  
  1095.       const gk = g[k];
  1096.       if (typeof gk !== 'function') return;
  1097.  
  1098.       let dummyObject = new gk;
  1099.       let nilFunc = () => { };
  1100.  
  1101.       let nilObj = {};
  1102.  
  1103.       // console.log(1111111111)
  1104.  
  1105.       let keyBoolD = '';
  1106.       let keyWindow = '';
  1107.       let keyFuncC = '';
  1108.       let keyCidj = '';
  1109.  
  1110.       for (const [t, y] of Object.entries(dummyObject)) {
  1111.         if (y instanceof Window) keyWindow = t;
  1112.       }
  1113.  
  1114.       const dummyObjectProxyHandler = {
  1115.         get(target, prop) {
  1116.           let v = target[prop]
  1117.           if (v instanceof Window && !keyWindow) {
  1118.             keyWindow = t;
  1119.           }
  1120.           let y = typeof v === 'function' ? nilFunc : typeof v === 'object' ? nilObj : v;
  1121.           if (prop === keyWindow) y = {
  1122.             requestAnimationFrame(f) {
  1123.               return 3;
  1124.             },
  1125.             cancelAnimationFrame() {
  1126.  
  1127.             }
  1128.           }
  1129.           if (!keyFuncC && typeof v === 'function' && !(prop in target.constructor.prototype)) {
  1130.             keyFuncC = prop;
  1131.           }
  1132.           // console.log('[get]', prop, typeof target[prop])
  1133.  
  1134.  
  1135.           return y;
  1136.         },
  1137.         set(target, prop, value) {
  1138.  
  1139.           if (typeof value === 'boolean' && !keyBoolD) {
  1140.             keyBoolD = prop;
  1141.           }
  1142.           if (typeof value === 'number' && !keyCidj && value >= 2) {
  1143.             keyCidj = prop;
  1144.           }
  1145.  
  1146.           // console.log('[set]', prop, value)
  1147.           target[prop] = value
  1148.  
  1149.           return true;
  1150.         }
  1151.       };
  1152.  
  1153.       dummyObject.start.call(new Proxy(dummyObject, dummyObjectProxyHandler))
  1154.  
  1155.       /*
  1156.             console.log({
  1157.               keyBoolD,
  1158.               keyFuncC,
  1159.               keyWindow,
  1160.               keyCidj
  1161.             })
  1162.  
  1163.             console.log( dummyObject[keyFuncC])
  1164.  
  1165.  
  1166.             console.log(2222222222)
  1167.       */
  1168.  
  1169.  
  1170.  
  1171.  
  1172.       g[k].prototype.start = function () {
  1173.         this.stop();
  1174.         this[keyBoolD] = true;
  1175.         this[keyCidj] = rafHub.request(this[keyFuncC]);
  1176.       }
  1177.         ;
  1178.       g[k].prototype.stop = function () {
  1179.         if (this.isActive() && this[keyCidj]) {
  1180.           rafHub.cancel(this[keyCidj]);
  1181.         }
  1182.         this[keyCidj] = null
  1183.       }
  1184.  
  1185.  
  1186.       /*
  1187.         g[k].start = function() {
  1188.             this.stop();
  1189.             this.D = true;
  1190.             var a = requestAnimationFrame
  1191.               , b = cancelAnimationFrame;
  1192.             this.j =  a.call(this.B, this.C)
  1193.         }
  1194.         ;
  1195.         g[k].stop = function() {
  1196.             if (this.isActive()) {
  1197.                 var a = requestAnimationFrame
  1198.                   , b = cancelAnimationFrame;
  1199.                 b.call(this.B, this.j)
  1200.             }
  1201.             this.j = null
  1202.         }
  1203.       */
  1204.  
  1205.  
  1206.  
  1207.       const keyzo = PERF_471489_ ? getzo(_yt_player) : null;
  1208.  
  1209.       if (keyzo) {
  1210.  
  1211.         k = keyzo
  1212.  
  1213.         const setCSSProp = (() => {
  1214.  
  1215.           let animationPropCapable = false;
  1216.           try {
  1217.             const propName = "--ibxpf"
  1218.             const value = 2;
  1219.             const keyframes = [{
  1220.               [propName]: value
  1221.             }];
  1222.             window.CSS.registerProperty({
  1223.               name: "--ibxpf",
  1224.               syntax: "<number>",
  1225.               inherits: false,
  1226.               initialValue: 1,
  1227.             });
  1228.             animationPropCapable = '1' === `${getComputedStyle(document.documentElement).getPropertyValue('--ibxpf')}`
  1229.           } catch (e) { }
  1230.  
  1231.           if (!animationPropCapable) {
  1232.             return (element, cssProp, value) => {
  1233.  
  1234.  
  1235.               element.style.setProperty(cssProp, value);
  1236.  
  1237.             }
  1238.           }
  1239.  
  1240.           const propMaps = new Map();
  1241.  
  1242.           function setCustomCSSProperty(element, propName, value) {
  1243.             let wm = propMaps.get(propName);
  1244.             if (!wm) {
  1245.  
  1246.               try {
  1247.                 window.CSS.registerProperty({
  1248.                   name: propName,
  1249.                   syntax: "*",
  1250.                   inherits: false
  1251.                 });
  1252.               } catch (e) {
  1253.                 console.warn(e);
  1254.               }
  1255.  
  1256.               propMaps.set(propName, (wm = new WeakMap()));
  1257.             }
  1258.  
  1259.             // Create the animation keyframes with the provided property and value
  1260.             const keyframes = [{
  1261.               [propName]: value
  1262.             }];
  1263.  
  1264.             let currentAnimation = wm.get(element);
  1265.             if (currentAnimation) {
  1266.  
  1267.               currentAnimation.effect.setKeyframes(keyframes);
  1268.  
  1269.             } else {
  1270.  
  1271.  
  1272.  
  1273.               // Set the animation on the element and immediately pause it
  1274.               const animation = animate.call(element, keyframes, {
  1275.                 duration: 1, // Very short duration as we just want to set the value
  1276.                 fill: 'forwards',
  1277.                 iterationStart: 1,
  1278.                 iterations: 2,
  1279.                 direction: 'alternate'
  1280.               });
  1281.  
  1282.  
  1283.               // animation.currentTime = 1;
  1284.               animation.pause();
  1285.  
  1286.               wm.set(element, animation);
  1287.  
  1288.  
  1289.             }
  1290.  
  1291.           }
  1292.  
  1293.           return setCustomCSSProperty;
  1294.  
  1295.  
  1296.         })();
  1297.  
  1298.  
  1299.         const attrUpdateFn = g[k];
  1300.         g['$$original$$' + k] = attrUpdateFn;
  1301.         g[k] = function (a, b, c) {
  1302.  
  1303.           // console.log(140000, a, b, c);
  1304.  
  1305.           let transformType = '';
  1306.           let transformValue = 0;
  1307.           let transformUnit = '';
  1308.  
  1309.           let byPassDefaultFn = false;
  1310.           if (b === "transform" && typeof c === 'string') {
  1311.  
  1312.             byPassDefaultFn = true;
  1313.  
  1314.             const aStyle = a.style;
  1315.  
  1316.             // let beforeMq = aStyle.getPropertyValue('--mq-transform');
  1317.             if (!(a instanceof HTMLElement)) return;
  1318.             if (c.length === 0) {
  1319.  
  1320.             } else if (c.startsWith('scalex(0.') || (c === 'scalex(0)' || c === 'scalex(1)')) {
  1321.               let p = c.substring(7, c.length - 1);
  1322.               let q = p.length >= 1 ? parseFloat(p) : -1;
  1323.               if (q > -1e-5 && q < 1 + 1e-5) {
  1324.                 transformType = 'scalex'
  1325.                 transformValue = q;
  1326.                 transformUnit = '';
  1327.               }
  1328.  
  1329.  
  1330.             } else if (c.startsWith('translateX(') && c.endsWith('px)')) {
  1331.  
  1332.               let p = c.substring(11, c.length - 3);
  1333.               let q = p.length >= 1 ? parseFloat(p) : NaN;
  1334.  
  1335.               if (typeof q === 'number' && !isNaN(q)) {
  1336.                 transformType = 'translateX'
  1337.                 transformValue = q;
  1338.                 transformUnit = 'px';
  1339.               }
  1340.  
  1341.  
  1342.             } else if (c.startsWith('scaley(0.') || (c === 'scaley(0)' || c === 'scaley(1)')) {
  1343.               let p = c.substring(7, c.length - 1);
  1344.               let q = p.length >= 1 ? parseFloat(p) : -1;
  1345.               if (q > -1e-5 && q < 1 + 1e-5) {
  1346.                 transformType = 'scaley'
  1347.                 transformValue = q;
  1348.                 transformUnit = '';
  1349.               }
  1350.  
  1351.  
  1352.             } else if (c.startsWith('translateY(') && c.endsWith('px)')) {
  1353.  
  1354.               let p = c.substring(11, c.length - 3);
  1355.               let q = p.length >= 1 ? parseFloat(p) : NaN;
  1356.  
  1357.               if (typeof q === 'number' && !isNaN(q)) {
  1358.                 transformType = 'translateY'
  1359.                 transformValue = q;
  1360.                 transformUnit = 'px';
  1361.               }
  1362.  
  1363.  
  1364.             }
  1365.  
  1366.             if (transformType) {
  1367.  
  1368.               if (transformType === 'scalex' || transformType === 'scaley') {
  1369.  
  1370.                 const q = transformValue;
  1371.  
  1372.  
  1373.                 /*
  1374.  
  1375.                 let vz = Math.round(steppingScaleN * q);
  1376.                 const customPropName = '--discrete-'+transformType
  1377.  
  1378.                 const currentValue = aStyle.getPropertyValue(customPropName);
  1379.  
  1380.                 const transform = (aStyle.transform || '');
  1381.                 const u = transform.includes(customPropName)
  1382.                 if (`${currentValue}` === `${vz}`) {
  1383.                   if (u) return;
  1384.                 }
  1385.  
  1386.  
  1387.                 setCSSProp(a,customPropName, vz);
  1388.                 // aStyle.setProperty(customPropName, vz)
  1389.  
  1390.                 let ck = '';
  1391.  
  1392.                 if (c.length === 9) ck = c;
  1393.                 else if (!u) ck = c.replace(/[.\d]+/, '0.5');
  1394.  
  1395.                 if (ck && beforeMq !== ck) {
  1396.                   aStyle.setProperty('--mq-transform', ck);
  1397.                 }
  1398.  
  1399.                 if (u) return;
  1400.                 c = `${transformType}(calc(var(--discrete-${transformType})/${steppingScaleN}))`;
  1401.  
  1402.  
  1403.  
  1404.                 */
  1405.  
  1406.                 const vz = +(Math.round(q * steppingScaleN) / steppingScaleN).toFixed(3);
  1407.  
  1408.                 c = `${transformType === 'scalex' ? 'scaleX' : 'scaleY'}(${vz})`
  1409.                 const cv = aStyle.transform;
  1410.  
  1411.                 // console.log(157, cv,c)
  1412.  
  1413.                 if (c === cv) return;
  1414.                 // console.log(257, cv,c)
  1415.  
  1416.                 aStyle.transform = c;
  1417.  
  1418.                 // return;
  1419.  
  1420.               } else if (transformType === 'translateX' || transformType === 'translateY') {
  1421.  
  1422.                 const q = transformValue;
  1423.  
  1424.                 /*
  1425.  
  1426.                 let vz = q.toFixed(1);
  1427.                 const customPropName = '--discrete-'+transformType
  1428.  
  1429.                 const aStyle = a.style;
  1430.                 const currentValue = (aStyle.getPropertyValue(customPropName) || '').replace('px', '');
  1431.  
  1432.  
  1433.                 const transform = (aStyle.transform || '');
  1434.                 const u = transform.includes(customPropName)
  1435.                 if (parseFloat(currentValue).toFixed(1) === vz) {
  1436.                   if (u) return;
  1437.                 }
  1438.  
  1439.                 setCSSProp(a,customPropName, vz + 'px');
  1440.                 // aStyle.setProperty(customPropName, vz + 'px')
  1441.  
  1442.                 let ck = '';
  1443.                 if (c.length === 15) ck = c;
  1444.                 else if (!u) ck = c.replace(/[.\d]+/, '0.5');
  1445.  
  1446.                 if (ck && beforeMq !== ck) {
  1447.                   aStyle.setProperty('--mq-transform', ck);
  1448.                 }
  1449.  
  1450.                 if (u) return;
  1451.                 c = `${transformType}(var(--discrete-${transformType}))`;
  1452.  
  1453.                 */
  1454.  
  1455.  
  1456.                 const vz = +q.toFixed(1);
  1457.  
  1458.                 c = `${transformType}(${vz}${transformUnit})`
  1459.                 const cv = aStyle.transform;
  1460.  
  1461.                 // console.log(158, cv,c)
  1462.  
  1463.                 if (c === cv) return;
  1464.                 // console.log(258, cv,c)
  1465.  
  1466.                 aStyle.transform = c;
  1467.  
  1468.                 // return;
  1469.  
  1470.               } else {
  1471.                 throw new Error();
  1472.               }
  1473.  
  1474.             } else {
  1475.               // if(beforeMq) a.style.setProperty('--mq-transform', '');
  1476.               const cv = aStyle.transform
  1477.               if (!c && !cv) return;
  1478.               else if (c === cv) return;
  1479.               aStyle.transform = c;
  1480.               // return;
  1481.             }
  1482.  
  1483.           } else if (b === "display") {
  1484.  
  1485.             const cv = a.style.display;
  1486.             if (!cv && !c) return;
  1487.             if (cv === c) return;
  1488.  
  1489.  
  1490.           } else if (b === "width") {
  1491.  
  1492.             const cv = a.style.width;
  1493.             if (!cv && !c) return;
  1494.             if (cv === c) return;
  1495.  
  1496.           }
  1497.  
  1498.           // console.log(130000, a, b, c);
  1499.  
  1500.           if (byPassDefaultFn) return;
  1501.           return attrUpdateFn.call(this, a, b, c);
  1502.         }
  1503.  
  1504.  
  1505.         /*
  1506.  
  1507.             g.zo = function(a, b, c) {
  1508.                 if ("string" === typeof b)
  1509.                     (b = yo(a, b)) && (a.style[b] = c);
  1510.                 else
  1511.                     for (var d in b) {
  1512.                         c = a;
  1513.                         var e = b[d]
  1514.                           , f = yo(c, d);
  1515.                         f && (c.style[f] = e)
  1516.                     }
  1517.             }
  1518.  
  1519.  
  1520.         */
  1521.  
  1522.  
  1523.       }
  1524.  
  1525.  
  1526.  
  1527.       const keyuG = PERF_471489_ ? getuG(_yt_player) : null;
  1528.  
  1529.       if (keyuG) {
  1530.  
  1531.         k = keyuG;
  1532.  
  1533.         const gk = g[k];
  1534.         const gkp = gk.prototype;
  1535.  
  1536.  
  1537.         /** @type { Map<string, WeakMap<any, any>> } */
  1538.         const ntLogs = new Map();
  1539.  
  1540.         if (typeof gkp.updateValue === 'function' && gkp.updateValue.length === 2 && !gkp.updateValue31) {
  1541.  
  1542.           gkp.updateValue31 = gkp.updateValue;
  1543.           gkp.updateValue = function (a, b) {
  1544.             if (typeof a !== 'string') return this.updateValue31(a, b);
  1545.  
  1546.             const element = this.element;
  1547.             if (!(element instanceof HTMLElement)) return this.updateValue31(a, b);
  1548.  
  1549.             let ntLog = ntLogs.get(a);
  1550.             if (!ntLog) ntLogs.set(a, (ntLog = new WeakMap()));
  1551.  
  1552.             let cache = ntLog.get(element);
  1553.             if (cache && cache.value === b) {
  1554.               return;
  1555.             }
  1556.             if (!cache) {
  1557.               this.__oldValueByUpdateValue__ = null;
  1558.               ntLog.set(element, cache = { value: b });
  1559.             } else {
  1560.               this.__oldValueByUpdateValue__ = cache.value;
  1561.               cache.value = b;
  1562.             }
  1563.  
  1564.  
  1565.             return this.updateValue31(a, b);
  1566.           }
  1567.  
  1568.  
  1569.           /*
  1570.             g.k.update = function(a) {
  1571.                 for (var b = g.u(Object.keys(a)), c = b.next(); !c.done; c = b.next())
  1572.                     c = c.value,
  1573.                     this.updateValue(c, a[c])
  1574.             }
  1575.             ;
  1576.             g.k.updateValue = function(a, b) {
  1577.                 (a = this.Td["{{" + a + "}}"]) && wG(this, a[0], a[1], b)
  1578.             }
  1579.           */
  1580.  
  1581.  
  1582.         }
  1583.  
  1584.  
  1585.       }
  1586.  
  1587.  
  1588.  
  1589.  
  1590.     })();
  1591.  
  1592.  
  1593.  
  1594.     FIX_Animation_n_timeline && (async () => {
  1595.  
  1596.  
  1597.       const timeline = await new Promise(resolve => {
  1598.  
  1599.         let cid = setInterval(() => {
  1600.           let t = (((document || 0).timeline || 0) || 0);
  1601.           if (t && typeof t._play === 'function') {
  1602.  
  1603.             clearInterval(cid);
  1604.             resolve(t);
  1605.           }
  1606.         }, 1);
  1607.  
  1608.         promiseForTamerTimeout.then(() => {
  1609.           resolve(null)
  1610.         });
  1611.  
  1612.       });
  1613.  
  1614.  
  1615.       const Animation = await new Promise(resolve => {
  1616.  
  1617.         let cid = setInterval(() => {
  1618.           let t = (((window || 0).Animation || 0) || 0);
  1619.           if (t && typeof t === 'function' && t.length === 2 && typeof t.prototype._updatePromises === 'function') {
  1620.  
  1621.             clearInterval(cid);
  1622.             resolve(t);
  1623.           }
  1624.         }, 1);
  1625.  
  1626.         promiseForTamerTimeout.then(() => {
  1627.           resolve(null)
  1628.         });
  1629.  
  1630.       });
  1631.  
  1632.       if (!timeline) return;
  1633.       if (!Animation) return;
  1634.  
  1635.       const aniProto = Animation.prototype;
  1636.  
  1637.       const getXroto = (x) => {
  1638.         try {
  1639.           return x.__proto__;
  1640.         } catch (e) { }
  1641.         return null;
  1642.       }
  1643.       const timProto = getXroto(timeline);
  1644.       if (!timProto) return;
  1645.       if (
  1646.         (
  1647.           typeof timProto.getAnimations === 'function' && typeof timProto.play === 'function' &&
  1648.           typeof timProto._discardAnimations === 'function' && typeof timProto._play === 'function' &&
  1649.           typeof timProto._updateAnimationsPromises === 'function' && !timProto.nofCQ &&
  1650.           typeof aniProto._updatePromises === 'function' && !aniProto.nofYH
  1651.         )
  1652.  
  1653.       ) {
  1654.  
  1655.         timProto.nofCQ = 1;
  1656.         aniProto.nofYH = 1;
  1657.  
  1658.         const originalAnimationsWithPromises = ((_updateAnimationsPromises) => {
  1659.  
  1660.  
  1661.           /*
  1662.             v.animationsWithPromises = v.animationsWithPromises.filter(function (c) {
  1663.               return c._updatePromises();
  1664.             });
  1665.           */
  1666.  
  1667.           const p = Array.prototype.filter;
  1668.  
  1669.           let res = null;
  1670.           Array.prototype.filter = function () {
  1671.  
  1672.             res = this;
  1673.             return this;
  1674.  
  1675.           };
  1676.  
  1677.           _updateAnimationsPromises.call({});
  1678.  
  1679.           Array.prototype.filter = p;
  1680.  
  1681.           if (res && typeof res.length === 'number') {
  1682.             /** @type {any[]} */
  1683.             const _res = res;
  1684.             return _res;
  1685.           }
  1686.  
  1687.  
  1688.           return null;
  1689.  
  1690.  
  1691.  
  1692.  
  1693.         })(timProto._updateAnimationsPromises);
  1694.  
  1695.         if (!originalAnimationsWithPromises || typeof originalAnimationsWithPromises.length !== 'number') return;
  1696.  
  1697.         // console.log('originalAnimationsWithPromises', originalAnimationsWithPromises)
  1698.  
  1699.         aniProto._updatePromises31 = aniProto._updatePromises;
  1700.  
  1701.         /*
  1702.         aniProto._updatePromises = function(){
  1703.           console.log('eff',this._oldPlayState, this.playState)
  1704.           return this._updatePromises31.apply(this, arguments)
  1705.         }
  1706.         */
  1707.  
  1708.         aniProto._updatePromises = function () {
  1709.           var oldPlayState = this._oldPlayState;
  1710.           var newPlayState = this.playState;
  1711.           // console.log('ett', oldPlayState, newPlayState)
  1712.           if (newPlayState !== oldPlayState) {
  1713.             this._oldPlayState = newPlayState;
  1714.             if (this._readyPromise) {
  1715.               if ("idle" == newPlayState) {
  1716.                 this._rejectReadyPromise();
  1717.                 this._readyPromise = void 0;
  1718.               } else if ("pending" == oldPlayState) {
  1719.                 this._resolveReadyPromise();
  1720.               } else if ("pending" == newPlayState) {
  1721.                 this._readyPromise = void 0;
  1722.               }
  1723.             }
  1724.             if (this._finishedPromise) {
  1725.               if ("idle" == newPlayState) {
  1726.                 this._rejectFinishedPromise();
  1727.                 this._finishedPromise = void 0;
  1728.               } else if ("finished" == newPlayState) {
  1729.                 this._resolveFinishedPromise();
  1730.               } else if ("finished" == oldPlayState) {
  1731.                 this._finishedPromise = void 0;
  1732.               }
  1733.             }
  1734.           }
  1735.           return this._readyPromise || this._finishedPromise;
  1736.         };
  1737.  
  1738.  
  1739.         let restartWebAnimationsNextTickFlag = false;
  1740.  
  1741.         const looperMethodT = () => {
  1742.  
  1743.           const runnerFn = (hRes) => {
  1744.             var b = timeline;
  1745.             b.currentTime = hRes;
  1746.             b._discardAnimations();
  1747.             if (0 == b._animations.length) {
  1748.               restartWebAnimationsNextTickFlag = false;
  1749.             } else {
  1750.               getRafPromiseForTickers().then(runnerFn);
  1751.             }
  1752.           }
  1753.  
  1754.           const restartWebAnimationsNextTick = () => {
  1755.             if (!restartWebAnimationsNextTickFlag) {
  1756.               restartWebAnimationsNextTickFlag = true;
  1757.               getRafPromiseForTickers().then(runnerFn);
  1758.             }
  1759.           }
  1760.  
  1761.           return { restartWebAnimationsNextTick }
  1762.         };
  1763.  
  1764.  
  1765.         const looperMethodN = () => {
  1766.  
  1767.           const acs = document.createElement('a-f');
  1768.           acs.id = 'a-f';
  1769.  
  1770.           const style = document.createElement('style');
  1771.           style.textContent = `
  1772.             @keyFrames aF1 {
  1773.               0% {
  1774.                 order: 0;
  1775.               }
  1776.               100% {
  1777.                 order: 6;
  1778.               }
  1779.             }
  1780.             #a-f[id] {
  1781.               visibility: collapse !important;
  1782.               position: fixed !important;
  1783.               top: -100px !important;
  1784.               left: -100px !important;
  1785.               margin:0 !important;
  1786.               padding:0 !important;
  1787.               outline:0 !important;
  1788.               border:0 !important;
  1789.               z-index:-1 !important;
  1790.               width: 0px !important;
  1791.               height: 0px !important;
  1792.               contain: strict !important;
  1793.               pointer-events: none !important;
  1794.               animation: 1ms steps(2) 0ms infinite alternate forwards running aF1 !important;
  1795.             }
  1796.           `;
  1797.           (document.head || document.documentElement).appendChild(style);
  1798.  
  1799.           document.documentElement.insertBefore(acs, document.documentElement.firstChild);
  1800.  
  1801.           const _onanimationiteration = function (evt) {
  1802.             const hRes = evt.timeStamp;
  1803.             var b = timeline;
  1804.             b.currentTime = hRes;
  1805.             b._discardAnimations();
  1806.             if (0 == b._animations.length) {
  1807.               restartWebAnimationsNextTickFlag = false;
  1808.               acs.onanimationiteration = null;
  1809.             } else {
  1810.               acs.onanimationiteration = _onanimationiteration;
  1811.             }
  1812.  
  1813.           }
  1814.  
  1815.  
  1816.  
  1817.           const restartWebAnimationsNextTick = () => {
  1818.             if (!restartWebAnimationsNextTickFlag) {
  1819.               restartWebAnimationsNextTickFlag = true;
  1820.               acs.onanimationiteration = _onanimationiteration;
  1821.  
  1822.             }
  1823.           }
  1824.  
  1825.           return { restartWebAnimationsNextTick }
  1826.         };
  1827.  
  1828.  
  1829.  
  1830.         const { restartWebAnimationsNextTick } = ('onanimationiteration' in document.documentElement) ? looperMethodN() : looperMethodT();
  1831.  
  1832.         timProto._play = function (c) {
  1833.           c = new Animation(c, this);
  1834.           this._animations.push(c);
  1835.           restartWebAnimationsNextTick();
  1836.           c._updatePromises();
  1837.           c._animation.play();
  1838.           c._updatePromises();
  1839.           return c
  1840.         }
  1841.  
  1842.         const animationsWithPromisesMap = new Set(originalAnimationsWithPromises);
  1843.         originalAnimationsWithPromises.length = 0;
  1844.         originalAnimationsWithPromises.push = null;
  1845.         originalAnimationsWithPromises.splice = null;
  1846.         originalAnimationsWithPromises.slice = null;
  1847.         originalAnimationsWithPromises.indexOf = null;
  1848.         originalAnimationsWithPromises.unshift = null;
  1849.         originalAnimationsWithPromises.shift = null;
  1850.         originalAnimationsWithPromises.pop = null;
  1851.         originalAnimationsWithPromises.filter = null;
  1852.         originalAnimationsWithPromises.forEach = null;
  1853.         originalAnimationsWithPromises.map = null;
  1854.  
  1855.  
  1856.  
  1857.         const _updateAnimationsPromises = () => {
  1858.           animationsWithPromisesMap.forEach(c => {
  1859.             if (!c._updatePromises()) animationsWithPromisesMap.delete(c);
  1860.           })
  1861.           /*
  1862.           v.animationsWithPromises = v.animationsWithPromises.filter(function (c) {
  1863.             return c._updatePromises();
  1864.           });
  1865.           */
  1866.         }
  1867.  
  1868.         timProto._updateAnimationsPromises31 = timProto._updateAnimationsPromises;
  1869.  
  1870.         timProto._updateAnimationsPromises = _updateAnimationsPromises;
  1871.  
  1872.  
  1873.         let pdFinished = Object.getOwnPropertyDescriptor(aniProto, 'finished');
  1874.         aniProto.__finished_native_get__ = pdFinished.get;
  1875.         if (typeof pdFinished.get === 'function' && !pdFinished.set && pdFinished.configurable === true && pdFinished.enumerable === true) {
  1876.  
  1877.  
  1878.           Object.defineProperty(aniProto, 'finished', {
  1879.             get() {
  1880.               this._finishedPromise || (!animationsWithPromisesMap.has(this) && animationsWithPromisesMap.add(this),
  1881.                 this._finishedPromise = new Promise((resolve, reject) => {
  1882.                   this._resolveFinishedPromise = function () {
  1883.                     resolve(this)
  1884.                   };
  1885.                   this._rejectFinishedPromise = function () {
  1886.                     reject({
  1887.                       type: DOMException.ABORT_ERR,
  1888.                       name: "AbortError"
  1889.                     })
  1890.                   };
  1891.                 }),
  1892.                 "finished" == this.playState && this._resolveFinishedPromise());
  1893.               return this._finishedPromise
  1894.             },
  1895.             set: undefined,
  1896.             enumerable: true,
  1897.             configurable: true
  1898.           });
  1899.  
  1900.         }
  1901.  
  1902.  
  1903.  
  1904.         let pdReady = Object.getOwnPropertyDescriptor(aniProto, 'ready');
  1905.         aniProto.__ready_native_get__ = pdReady.get;
  1906.         if (typeof pdReady.get === 'function' && !pdReady.set && pdReady.configurable === true && pdReady.enumerable === true) {
  1907.  
  1908.           Object.defineProperty(aniProto, 'ready', {
  1909.             get() {
  1910.               this._readyPromise || (!animationsWithPromisesMap.has(this) && animationsWithPromisesMap.add(this),
  1911.                 this._readyPromise = new Promise((resolve, reject) => {
  1912.                   this._resolveReadyPromise = function () {
  1913.                     resolve(this)
  1914.                   };
  1915.                   this._rejectReadyPromise = function () {
  1916.                     reject({
  1917.                       type: DOMException.ABORT_ERR,
  1918.                       name: "AbortError"
  1919.                     })
  1920.                   };
  1921.                 }),
  1922.                 "pending" !== this.playState && this._resolveReadyPromise());
  1923.               return this._readyPromise
  1924.             },
  1925.             set: undefined,
  1926.             enumerable: true,
  1927.             configurable: true
  1928.           });
  1929.  
  1930.         }
  1931.  
  1932.  
  1933.  
  1934.  
  1935.         /*
  1936.  
  1937.  
  1938.           function f(c) {
  1939.               var b = v.timeline;
  1940.               b.currentTime = c;
  1941.               b._discardAnimations();
  1942.               0 == b._animations.length ? d = !1 : requestAnimationFrame(f)
  1943.           }
  1944.           var h = window.requestAnimationFrame;
  1945.           window.requestAnimationFrame = function(c) {
  1946.               return h(function(b) {
  1947.                   v.timeline._updateAnimationsPromises();
  1948.                   c(b);
  1949.                   v.timeline._updateAnimationsPromises()
  1950.               })
  1951.           }
  1952.           ;
  1953.           v.AnimationTimeline = function() {
  1954.               this._animations = [];
  1955.               this.currentTime = void 0
  1956.           }
  1957.           ;
  1958.           v.AnimationTimeline.prototype = {
  1959.               getAnimations: function() {
  1960.                   this._discardAnimations();
  1961.                   return this._animations.slice()
  1962.               },
  1963.               _updateAnimationsPromises: function() {
  1964.                   v.animationsWithPromises = v.animationsWithPromises.filter(function(c) {
  1965.                       return c._updatePromises()
  1966.                   })
  1967.               },
  1968.               _discardAnimations: function() {
  1969.                   this._updateAnimationsPromises();
  1970.                   this._animations = this._animations.filter(function(c) {
  1971.                       return "finished" != c.playState && "idle" != c.playState
  1972.                   })
  1973.               },
  1974.               _play: function(c) {
  1975.                   c = new v.Animation(c,this);
  1976.                   this._animations.push(c);
  1977.                   v.restartWebAnimationsNextTick();
  1978.                   c._updatePromises();
  1979.                   c._animation.play();
  1980.                   c._updatePromises();
  1981.                   return c
  1982.               },
  1983.               play: function(c) {
  1984.                   c && c.remove();
  1985.                   return this._play(c)
  1986.               }
  1987.           };
  1988.           var d = !1;
  1989.           v.restartWebAnimationsNextTick = function() {
  1990.               d || (d = !0,
  1991.               requestAnimationFrame(f))
  1992.           }
  1993.           ;
  1994.           var a = new v.AnimationTimeline;
  1995.           v.timeline = a;
  1996.           try {
  1997.               Object.defineProperty(window.document, "timeline", {
  1998.                   configurable: !0,
  1999.                   get: function() {
  2000.                       return a
  2001.                   }
  2002.               })
  2003.           } catch (c) {}
  2004.           try {
  2005.               window.document.timeline = a
  2006.           } catch (c) {}
  2007.  
  2008.         */
  2009.  
  2010.  
  2011.  
  2012.         /*
  2013.  
  2014.       var g = window.getComputedStyle;
  2015.       Object.defineProperty(window, "getComputedStyle", {
  2016.           configurable: !0,
  2017.           enumerable: !0,
  2018.           value: function() {
  2019.               v.timeline._updateAnimationsPromises();
  2020.               var e = g.apply(this, arguments);
  2021.               h() && (e = g.apply(this, arguments));
  2022.               v.timeline._updateAnimationsPromises();
  2023.               return e
  2024.           }
  2025.       });
  2026.  
  2027.       */
  2028.  
  2029.  
  2030.  
  2031.  
  2032.       }
  2033.  
  2034.  
  2035.  
  2036.  
  2037.     })();
  2038.  
  2039.  
  2040.  
  2041.   });
  2042.  
  2043.  
  2044.   setupEvents();
  2045.  
  2046.  
  2047.  
  2048.   if (isMainWindow) {
  2049.  
  2050.     console.groupCollapsed(
  2051.       "%cYouTube JS Engine Tamer",
  2052.       "background-color: #EDE43B ; color: #000 ; font-weight: bold ; padding: 4px ;"
  2053.     );
  2054.  
  2055.  
  2056.  
  2057.     console.log("Script is loaded.");
  2058.     console.log("This script changes the core mechanisms of the YouTube JS engine.");
  2059.  
  2060.     console.log("This script is experimental and subject to further changes.");
  2061.  
  2062.     console.log("This might boost your YouTube performance.");
  2063.  
  2064.     console.log("CAUTION: This might break your YouTube.");
  2065.  
  2066.  
  2067.     if (prepareLogs.length >= 1) {
  2068.       console.log(" =========================================================================== ");
  2069.  
  2070.       for (const msg of prepareLogs) {
  2071.         console.log(msg)
  2072.       }
  2073.  
  2074.       console.log(" =========================================================================== ");
  2075.     }
  2076.  
  2077.     console.groupEnd();
  2078.  
  2079.   }
  2080.  
  2081.  
  2082. })();