onkeydown：键盘按下事件
按键的ASCII：ev.keyCode
是否按下了特定的组合按钮 ：
if (ev.altKey == true) { console.log('您按下了alt键') } else if (ev.ctrlKey == true) { console.log('您按下了ctrl键') } else if (ev.shiftKey == true) { console.log('您按下了shift键') }
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body οnkeydοwn="key();"> </body> <script> function key(e){ var ev = e||event document.title=ev.keyCode // 判断是否按下了组合按键 if(ev.altKey==true){ console.log('您按下了alt键') } else if (ev.ctrlKey == true) { console.log('您按下了ctrl键')} else if (ev.shiftKey == true) { console.log('您按下了shift键') } } </script>
</html>
