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Youtube playback rate shortcut

Press [ and ] to slow down/speed up the video, and shift+[ to reset the playback rate

当前为 2020-06-17 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Youtube playback rate shortcut 
  3. // @namespace   Violentmonkey Scripts
  4. // @match       *://youtube.com/*
  5. // @match       *://*.youtube.com/*
  6. // @grant       none
  7. // @run-at      document-idle
  8. // @version     1.0
  9. // @author      qsniyg
  10. // @description Press [ and ] to slow down/speed up the video, and shift+[ to reset the playback rate
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.   var playback_increment = 0.25;
  15.  
  16.   var set_playback = function(diff) {
  17.     var video_el = document.querySelector("video.video-stream.html5-main-video");
  18.     if (video_el) {
  19.       if (diff === 0)
  20.         video_el.playbackRate = 1;
  21.       else {
  22.         var new_pr = video_el.playbackRate + diff * playback_increment;
  23.         if (new_pr > 0)
  24.           video_el.playbackRate = new_pr;
  25.       }
  26.     }
  27.   }
  28.  
  29.   document.addEventListener("keydown", function(e) {
  30.     if (e.target && e.target.tagName === "INPUT" || e.target.tagName === "TEXTAREA")
  31.       return;
  32.     
  33.     if (e.key === "[" && !e.shiftKey) {
  34.       set_playback(-1);
  35.     } else if (e.key === "]") {
  36.       set_playback(1);
  37.     } else if (e.shiftKey && (e.key === "[" || e.key === "{")) {
  38.       set_playback(0);
  39.     }
  40.   });
  41. })();