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YouTube: Stop Automatic Video Playback

Stop automatic video playback everywhere. Works on first page load & after navigating.

当前为 2021-05-06 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name            YouTube: Stop Automatic Video Playback
  3. // @namespace       de.sidneys.userscripts
  4. // @homepage        https://gist.githubusercontent.com/sidneys/02a9025ae1f23aefe1f4ea02e78b0ac8/raw/
  5. // @version         4.0.2
  6. // @description     Stop automatic video playback everywhere. Works on first page load & after navigating.
  7. // @author          sidneys
  8. // @icon            https://www.youtube.com/favicon.ico
  9. // @noframes
  10. // @include         http*://www.youtube.com/*
  11. // @require         https://greasyfork.org/scripts/38888-greasemonkey-color-log/code/Greasemonkey%20%7C%20Color%20Log.js
  12. // @run-at          document-start
  13. // ==/UserScript==
  14.  
  15. /**
  16.  * ESLint
  17.  * @global
  18.  */
  19. Debug = false
  20.  
  21.  
  22. /**
  23.  * Applicable URL paths
  24.  * @default
  25.  * @constant
  26.  */
  27. const urlPathList = [
  28.     '/channel',
  29.     '/watch'
  30. ]
  31.  
  32.  
  33. /**
  34.  * YouTube API Player States
  35.  * @constant
  36.  * @enum
  37.  */
  38. const PLAYERSTATE = {
  39.     '-1': 'UNSTARTED',
  40.     0: 'ENDED',
  41.     1: 'PLAYING',
  42.     2: 'PAUSED',
  43.     3: 'BUFFERING',
  44.     5: 'CUED'
  45. }
  46.  
  47.  
  48. /**
  49.  * Generate a method name for an event name using the DOM convention ("on" + Event Name)
  50.  * @param {String} eventName - Event name (e.g. 'Click')
  51.  * @returns {String} - Method name (e.g. 'onclick')
  52.  */
  53. let getHandlerMethodNameForEventName = eventName => `on${eventName.toLowerCase()}`
  54.  
  55. /**
  56.  * Lookup the first <video> Element
  57.  * @returns {Element} - <video> Element
  58.  */
  59. let getVideoElement = () => document.querySelector('video')
  60.  
  61. /**
  62.  * Lookup YouTube Video Player through the DOM
  63.  * @returns {Object} - YouTube Video Player
  64.  */
  65. let getYoutubePlayer = () => {
  66.     console.debug('getYoutubePlayer')
  67.  
  68.     // Lookup Player element
  69.     const playerElement = document.querySelector('ytd-player')
  70.  
  71.     // Return the property containing the Player API
  72.     return playerElement && playerElement.player_
  73. }
  74.  
  75. /**
  76.  * Stop playback on YouTube via the Player API
  77.  * @param {Object} youtubePlayer - YouTube Video Player API
  78.  */
  79. let stopYoutubePlayerPlayback = (youtubePlayer) => {
  80.     console.debug('stopYoutubePlayerPlayback')
  81.  
  82.     // Get YouTube Video element
  83.     const videoElement = getVideoElement()
  84.  
  85.     // Playback event types to watch
  86.     const eventTypeList = [ 'play', 'playing', 'timeupdate' ]
  87.  
  88.     // Iterate playback event types
  89.     eventTypeList.forEach((eventType, eventTypeIndex) => {
  90.  
  91.         // Playback "Stopper" method, each playback event
  92.         let eventHandler = () => {
  93.             console.debug(`videoElement#${eventType}`)
  94.  
  95.             // Remove all "Stopper" event handlers by deleting <video>#onplay, <video>#onplaying, <video>#ontimeupdate
  96.             eventTypeList.forEach((eventType) => {
  97.                 const handlerMethodName = getHandlerMethodNameForEventName(eventType)
  98.  
  99.                 delete videoElement[handlerMethodName]
  100.                 videoElement[handlerMethodName] = null
  101.  
  102.                 // DEBUG
  103.                 console.debug('videoElement', 'removing event handler method:', handlerMethodName)
  104.             })
  105.  
  106.             // Lookup YouTube Player state
  107.             const playerState = youtubePlayer.getPlayerState()
  108.  
  109.             // Stop video (if it is not already paused)
  110.             if (youtubePlayer.getPlayerState() !== 2) {
  111.                 youtubePlayer.pauseVideo()
  112.  
  113.                 // Status
  114.                 console.info('Stopped automatic video playback', 'during the', PLAYERSTATE[playerState], 'phase')
  115.  
  116.                 // DEBUG
  117.                 console.debug('stopYoutubePlayerPlayback', 'eventType:', eventType, 'playerState:', `${playerState} (${PLAYERSTATE[playerState]})`)
  118.             }
  119.         }
  120.  
  121.         // Add event handler to video element
  122.         const handlerMethodName = getHandlerMethodNameForEventName(eventType)
  123.         videoElement[handlerMethodName] = eventHandler
  124.     })
  125. }
  126.  
  127.  
  128. /**
  129.  * Init
  130.  */
  131. let init = () => {
  132.     console.info('init')
  133.  
  134.     // Verify URL path
  135.     if (!urlPathList.some(urlPath => window.location.pathname.startsWith(urlPath))) { return }
  136.  
  137.     // Initiate lookup loop
  138.     let requestId
  139.     let lookup = () => {
  140.         // Lookup YouTube Player
  141.         const youtubePlayer = getYoutubePlayer()
  142.  
  143.         // Is 1. the Player API available,  2. the Player ready?
  144.         if (!youtubePlayer || (youtubePlayer && !youtubePlayer.isReady())) {
  145.             // DEBUG
  146.             console.debug('❌ YouTube Player API unavailable or Player not ready yet.')
  147.  
  148.             // Skip loop
  149.             requestId = window.requestAnimationFrame(lookup)
  150.  
  151.             return
  152.         }
  153.  
  154.         // Stop Playback
  155.         stopYoutubePlayerPlayback(youtubePlayer)
  156.  
  157.         // DEBUG
  158.         console.debug('✅ YouTube Player API available and Player ready.')
  159.  
  160.         // End loop
  161.         window.cancelAnimationFrame(requestId)
  162.     }
  163.  
  164.     // Initiate loop
  165.     requestId = window.requestAnimationFrame(lookup)
  166. }
  167.  
  168.  
  169. /**
  170.  * Handle in-page navigation (modern YouTube)
  171.  * @listens window:Event#yt-navigate-finish
  172.  */
  173. window.addEventListener('yt-navigate-finish', () => {
  174.     console.debug('window#yt-navigate-finish')
  175.  
  176.     init()
  177. })