onkeyup 按键弹起
onkeypress 按键按下并弹起
onkeydown 按键按下时触发
1. window.onkeydown =function(e){
2. console.log(e)
3. console.log(e.key)
4. console.log(e.keyCode)
5. console.log(e.ctrlKey)
6. // e.key 获取点击的哪个字符
7. // e.keyCode 获取点击字符的字符编码
8. if(e.key == 'c' && e.ctrlKey){
9. console.log('你按下了Ctrl + c')
10. }
11. if(e.keyCode == '83' && e.ctrlKey && e.shiftKey && e.altKey){
12. console.log('你按下了 Ctrl + shift + alt + s')
13. }
14. }