HTML5 video speed controller and preferred speed adjustment

HTML5 video speed controller and preferred speed adjustmen, increase video speed by 0.1 with'ctr+.'decrease video speed by 0.1 with 'ctrl+\'reset video speed with' ctrl+,'set video speed to 1.15 with 'ctrl+/' set video speed to 1.35 with' ctrl+:'set video speed to 1.65 with 'ctrl+]'

当前为 2021-01-25 提交的版本，查看最新版本。

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// ==UserScript==
// @name         HTML5 video speed controller and preferred speed adjustment
// @namespace    http://tampermonkey.net/
// @version    1.1
// @description HTML5 video speed controller and preferred speed adjustmen, increase video speed by 0.1 with'ctr+.'decrease video speed by 0.1 with 'ctrl+\'reset video speed with' ctrl+,'set video speed to 1.15 with 'ctrl+/' set video speed to 1.35 with' ctrl+:'set video speed to 1.65 with 'ctrl+]'
// @author      我的名字十二个字不信你数 
// @include  *
// @grant        none
// ==/UserScript==
(function () {
    'use strict';
    var div = document.createElement("div");
    div.innerHTML = '<div id="speeddiv" style="position:fixed;left:5px;top:5px;z-index:9999999;font-size:1.0em;display:none"></div>'
    document.getElementsByTagName('body')[0].appendChild(div);
    var itime='';
    document.onkeydown = function (event) {
            if(!document.querySelector('video')) return;
            event = event || window.event
            var fg=false;
            if (event.keyCode == 190 && event.ctrlKey) {
                document.querySelector('video').playbackRate += 0.1
                fg=true
            }
            if (event.keyCode == 226 && event.ctrlKey) {
                document.querySelector('video').playbackRate -= 0.1
                fg=true
            }
            if (event.keyCode == 188 && event.ctrlKey) {
                document.querySelector('video').playbackRate = 1
                fg=true
            }
            if (event.keyCode == 191 && event.ctrlKey) {
                document.querySelector('video').playbackRate = 1.15
                fg=true
            }
            if (event.keyCode == 186 && event.ctrlKey) {
                document.querySelector('video').playbackRate = 1.35
                fg=true
            }
            if (event.keyCode == 221 && event.ctrlKey) {
                document.querySelector('video').playbackRate = 1.65
                fg=true
            }
            if(fg){
              if(itime!==''){
                clearTimeout(itime);
              }
              document.getElementById('speeddiv').style.display='block'
              document.getElementById('speeddiv').innerHTML='speed:'+document.querySelector('video').playbackRate.toFixed(2)
              itime=setTimeout(function(){
                  document.getElementById('speeddiv').style.display='none'
              },2000)
            }
        }
        // Your code here...
})();

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