Javascript:readystatechange事件

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  • Post category:java


关于EventTarget.addEventListener():

https://developer.mozilla.org/zh-CN/docs/Web/API/EventTarget/addEventListener


代码:

<!DOCTYPE html>
<html>
<head>
  <title></title>
</head>
<body>
hi
<script type="text/javascript">
  function add(e) {
    console.log('document.readyState: ', document.readyState)
    console.log('trigger: ', e);
  }

  if (document.addEventListener) {
    document.addEventListener('readystatechange', add);
  }
  else if(document.attachEvent) {  // IE
    document.attachEvent('onreadystatechange', add);
  }

</script>
</body>
</html>

浏览器打开,运行结果:

输入图片说明


转载于:https://my.oschina.net/letiantian/blog/775916