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How to determine whether the iframe is loaded through JS

不言
不言Original
2018-06-26 14:22:293666browse

This article mainly introduces the method of JS to judge whether the iframe is loaded. It provides two implementation methods, which can be judged and operated respectively for IE core and non-IE core browsers. It involves javascript event operation and judgment skills, which are required. Friends can refer to the following

The example of this article describes the method of JS to determine whether the iframe is loaded. Share it with everyone for your reference, the details are as follows: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
</head>
<body>
<script type="text/javascript">
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
var iframe = document.createElement("iframe");
iframe.src = "//www.jb51.net/";
if (isIE) {
  iframe.onreadystatechange = function(){
    if(iframe.readyState == "loaded" || iframe.readyState == "complete"){
      alert("loaded");
    }
  };
} else {
  iframe.onload = function(){
    alert("loaded");
  };
}
document.body.appendChild(iframe);
</script>
</body>
</html>

or: 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
</head>
<body>
<script type="text/javascript">
var iframe = document.createElement("iframe");
iframe.src = "//www.php.cn/";
if (iframe.attachEvent){
  iframe.attachEvent("onload", function(){
    alert("loaded");
  });
} else {
  iframe.onload = function(){
    alert("loaded");
  };
}
document.body.appendChild(iframe);
</script>
</body>
</html>

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