Js 监听浏览器内键盘事件

https://developer.mozilla.org/zh-CN/docs/Web/API/EventTarget/addEventListene
搜索一下keyCode
按F12打印ssss

window.addEventListener('keyup', doSomething, true)

function doSomething(e)
{
  if(e.keyCode == 123)
  {

    console.log("ssssss");
  }
}