동영상을 빠르게 돌리자...

동영상 돌리기.js

// ==UserScript==
// @name     비디오 돌리기
// @version  1
// @grant    none
// ==/UserScript==

(()=>{
    const div = document.createElement('div')
    document.body.appendChild(div)
    div.style.position = 'absolute'
    div.style.backgroundColor = 'black';
    div.style.color = 'white';
    div.style.zIndex = 100000;
    
    const videofn = (mp3, key)=>{
        console.log('videofn')
        switch(key.toLocaleLowerCase()){
                case 'q': mp3.playbackRate-=0.25; break;
                case 'w': mp3.playbackRate=1.75; break;
                case 'e': mp3.playbackRate+=0.25; break;
                case 'r': mp3.playbackRate=4; break;
                default: break;
            }
        div.innerHTML = mp3.playbackRate;
    }
    
    try{
        div.innerHTML = document.getElementsByTagName('video')[0].playbackRate
    }catch{}
    
    document.documentElement.addEventListener('keydown',e=>{
        const iframe = [...document.getElementsByTagName('iframe')]
        const video = [...document.getElementsByTagName('video')]
        if(video) video.forEach(v=>videofn(v, e.key));
        if(iframe) iframe.forEach(v=>[...v.contentDocument.getElementsByTagName('video')].forEach(v=>videofn(v, e.key)))
    })
})();