Shift Space Toggle Youtube CE Element

This is to toggle annoying Youtube CE Element near the end of the video

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Shift Space Toggle Youtube CE Element
// @name:en         Shift Space Toggle Youtube CE Element
// @name:ja         Shift Space Toggle Youtube CE Element
// @name:zh-TW         Shift Space Toggle Youtube CE Element
// @name:zh-CN         Shift Space Toggle Youtube CE Element
// @name         Shift Space Toggle Youtube CE Element
// @namespace    http://tampermonkey.net/
// @version      0.5.1
// @description  This is to toggle annoying Youtube CE Element near the end of the video
// @description:en  This is to toggle annoying Youtube CE Element near the end of the video
// @description:ja  これは、ビデオの終わり近くにある迷惑な Youtube CE 要素を切り替えるためのものです。
// @description:zh-TW  這是為了切換在影片結尾附近煩人的 Youtube CE 元素
// @description:zh-CN  這是為了切換在影片結尾附近煩人的 Youtube CE 元素
// @author       CY Fung
// @match        https://www.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant        none
// @license      MIT
// ==/UserScript==

/* jshint esversion:6 */
(function() {
  'use strict';

  let videoElm = null;
  const ceElems = [];
  let isPassiveAvailable = null

  let earliestShown = -1;
  let endTime = -1;

  const WeakRef = window?.WeakRef;

  let videoReady = false

  let lastPress = -1
  const allowList = [
        'DIV', 'SPAN', 'BODY', 'HTML', 'VIDEO', 'A',
        'YTD-PLAYER', 'YTD-WATCH-FLEXY', 'YTD-PAGE-MANAGER', 'YTD-MINIPLAYER'
    ];

  function cacheCEElems() {

    const m = document.querySelectorAll('ytd-player#ytd-player .ytp-ce-element');
    if (m.length === 0) return false;

    ceElems.length = 0;
    for (const elm of m) {
      ceElems.push(new WeakRef(elm))
    }

    return true;

  }

  function videoTimeUpdate(evt) {

    //passive = true
    //capture = false

    if (!videoReady) {
      if (evt?.target?.matches('ytd-player#ytd-player video')) {
        videoReady = true
        if (cacheCEElems() === false) setTimeout(cacheCEElems, 180);
      }
    }

    if (ceElems.length === 0) return;

    const video = evt.target;
    const anyShown = ceElems.some((elmRef) => elmRef.deref()?.classList?.contains('ytp-ce-element-show') === true)
    //console.log(135, anyShown, video.currentTime)
    if (anyShown) {
      if (earliestShown > 0 && -earliestShown < -video.currentTime) {
        earliestShown = video.currentTime
        endTime = video.duration
      } else if (earliestShown < 0) {
        videoElm = new WeakRef(video);
        earliestShown = video.currentTime
        endTime = video.duration
      }
    }


  }

  function initialForVideoDetection(evt) {

    //passive = true
    //capture = true

    const video = evt?.target;
    if (video?.nodeName === 'VIDEO' && typeof video.src == 'string') {} else return;

    videoReady = false;
    ceElems.length = 0;

    videoElm = null;
    earliestShown = -1;
    endTime = -1;


    new Promise(function() {


      if (video.hasAttribute('usr-video-cem')) return;
      video.setAttribute('usr-video-cem', '');

      if (isPassiveAvailable === null) isPassiveAvailable = checkPassive();
      video.addEventListener('timeupdate', videoTimeUpdate, optCapture(true, false));

    })

  }

  function pageKeyDownfunction(evt) {
    //passive = false
    //capture = true

    if (evt.code === 'Space' && evt.shiftKey) {

      if (!allowList.includes(evt.target.nodeName)) return;

      if (endTime > earliestShown && earliestShown > 0) {

        let video = videoElm?.deref();

        if (!video) return;

        let p = (video.currentTime - earliestShown) / (endTime - earliestShown);
        if (p >= 0 && p <= 1) {
          evt.preventDefault();
          evt.stopPropagation();
          evt.stopImmediatePropagation();

          for (const ceElem of ceElems) {
            ceElem?.deref()?.classList.toggle('ytp-ce-element-show');
          }
        }

      }

    }
  }

  function checkPassive() {

    let passiveSupported = false;

    try {
      const options = {
        get passive() {
          passiveSupported = true;
          return false;
        }
      };

      window.addEventListener("test", null, options);
      window.removeEventListener("test", null, options);
    } catch (err) {
      passiveSupported = false;
    }

    return passiveSupported

  }

  const optCapture = (passive, capture) => isPassiveAvailable ? { passive, capture } : capture;

  new Promise(function() {

    if (isPassiveAvailable === null) isPassiveAvailable = checkPassive();
    document.addEventListener('canplay', initialForVideoDetection, optCapture(true, true));

  })

  document.addEventListener('keydown', pageKeyDownfunction, true)

  //ytp-ce-video ytp-ce-top-left-quad ytp-ce-size-853 ytp-ce-element-show

  // Your code here...
})();