一. 按下某个键
document.addEventListener('keydown',e => {console.log(e.key,'key=='); })
二. 按下ctrl,shift,alt加任意键
document.addEventListener('keydown',e => {// 用ctrlKey,shiftKey,altKey的值来监听是否按下了这三个键,true表示按下了，false表示没有按下if(e.key == 'a' && e.ctrlKey){console.log(e.key,'key==');}})
三. 按下任意组合键
// 以按下a,b,p三个键为例，无所谓先后顺序let tempSrt = ''const pressArr = ['abp','apb','bap','bpa','pab','pba']// 监听键盘按下document.addEventListener('keydown', e => {if(!tempStr.includes(e.key)){tempStr += e.keyif(pressArr.includes(tempStr)){console.log(tempStr,'tempStr===');}}})// 监听键盘抬起，抬起的时候删除这个keydocument.addEventListener('keyup', e => {tempStr = tempStr.replace(e.key,'')})
