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Youtube Spacebar Pause/Play Fix

A Youtube bug disables the space key shortcut, which often happens when you change windows and return to Youtube, often with the ALT + TAB shortcut. This script ensures that the spacebar PAUSE / PLAY shortcut works correctly.

  1. // ==UserScript==
  2. // @name         Youtube Spacebar Pause/Play Fix
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.4
  5. // @description  A Youtube bug disables the space key shortcut, which often happens when you change windows and return to Youtube, often with the ALT + TAB shortcut. This script ensures that the spacebar PAUSE / PLAY shortcut works correctly.
  6. // @author       waszner and Mimo
  7. // @match        *://www.youtube.com/*
  8.  
  9. // @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
  10. // @grant        none
  11. // @license MIT
  12. // ==/UserScript==
  13.  
  14.  
  15.  
  16. (function() {
  17.  
  18.     'use strict';
  19.  
  20.  
  21.  
  22.  
  23.     function isYouTubeWatchPage() {
  24.         return window.location.href.includes('www.youtube.com/watch');
  25.     }
  26.  
  27.  
  28.     // Fonction pour détecter les changements de page sur YouTube
  29.     function detectPageChanges() {
  30.         // Fonction pour afficher une alerte en cas de changement
  31.         function pageIsWatch() {
  32.             console.log("new video listeners")
  33.             isYoutubeWatch = true;
  34.             updateVideoListeners();
  35.         }
  36.  
  37.         // Ajoutez un écouteur d'événement pour l'événement 'spfdone'
  38.         window.addEventListener('spfdone', function() {
  39.             if (isYouTubeWatchPage()) {
  40.                 pageIsWatch();
  41.             }else{
  42.                 isYoutubeWatch = false;
  43.             }
  44.         });
  45.  
  46.         // Ajoutez un écouteur d'événement pour l'événement 'yt-navigate-finish'
  47.         window.addEventListener('yt-navigate-finish', function() {
  48.             if (isYouTubeWatchPage()) {
  49.                 pageIsWatch();
  50.             }else{
  51.                 isYoutubeWatch = false;
  52.             }
  53.         });
  54.     }
  55.  
  56.  
  57.     detectPageChanges();
  58.     if(isYouTubeWatchPage()){
  59.         updateVideoListeners();
  60.  
  61.     }
  62.  
  63.  
  64.  
  65.  
  66.  
  67.     let isYoutubeWatch = isYouTubeWatchPage();
  68.  
  69.     let spacePressed = false;
  70.  
  71.     let currentTime = 0;
  72.  
  73.     let isVideoPlaying = false;
  74.  
  75.     let wasVideoPlaying = false;
  76.  
  77.     const YoutubeCommentFieldSelector = '#contenteditable-root'; //css selector of youtube comments
  78.     const YoutubeSearchBar = '#search'; //css selector of youtube search bar
  79.  
  80.     const KPressDelay = 200; // how much time will the program wait before pressing K (probably ping dependent)
  81.  
  82.     // Add event listener
  83.  
  84.     document.addEventListener('keydown', pressKifWatch, true);
  85.  
  86.     function pressKifWatch(e){
  87.         // Only executes the pressK function if it's a youtube watch page
  88.         if(isYouTubeWatchPage()){
  89.             pressKWithSpacebar(e);
  90.         }
  91.     }
  92.  
  93.     // Function to press "K" with the Spacebar when the video's play/pause state didn't change
  94.  
  95.     function pressKWithSpacebar(e) {
  96.  
  97.         //preventing playing/pausing the video while typing coments or replies
  98.  
  99.         if (e.target.matches(YoutubeCommentFieldSelector) || e.target.matches(YoutubeSearchBar)){
  100.  
  101.             return;
  102.  
  103.         }else{
  104.  
  105.             if (e.key === ' ' && spacePressed === false) {
  106.  
  107.                 spacePressed = true;
  108.  
  109.                 wasVideoPlaying = isVideoPlaying;
  110.  
  111.                 setTimeout(simulateKKeyPress, KPressDelay);
  112.  
  113.             }
  114.  
  115.         }
  116.  
  117.     }
  118.  
  119.     function updateVideoListeners(){
  120.         // Listen to the video's play and pause events to update the variables
  121.  
  122.         const video = document.querySelector('video');
  123.  
  124.         //These prevent external play/pause (pressing K, clicking on the video etc) from messing up the program's run
  125.  
  126.         video.addEventListener('play', function() {
  127.  
  128.             isVideoPlaying = true;
  129.  
  130.             if (spacePressed) { //Prevents the "double tap" of spaceBar when the video IS in focus and pressing the space bar did play/pause it
  131.  
  132.                 spacePressed = false; // Reset the Spacebar press time if video started playing
  133.  
  134.             }
  135.  
  136.         });
  137.  
  138.         video.addEventListener('pause', function() {
  139.  
  140.             isVideoPlaying = false;
  141.  
  142.             if (spacePressed) { //Prevents the "double tap" of spaceBar when the video IS in focus and pressing the space bar did play/pause it
  143.  
  144.                 spacePressed = false; // Reset the Spacebar press time if video paused
  145.  
  146.             }
  147.  
  148.         });
  149.  
  150.     }
  151.  
  152.     // Function to simulate pressing "K" if the conditions are met
  153.  
  154.     function simulateKKeyPress() {
  155.  
  156.         if (spacePressed && (wasVideoPlaying === isVideoPlaying)) {
  157.  
  158.             // Send an "K" keypress to simulate pressing "K"
  159.  
  160.             const nKeyPress = new KeyboardEvent('keydown', { key: 'K', code: 'KeyK', which: 75, keyCode: 75, charCode: 75});
  161.  
  162.             document.dispatchEvent(nKeyPress);
  163.  
  164.         }
  165.  
  166.     }
  167.  
  168.  
  169.  
  170.  
  171. })();

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