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JS method to determine whether iframe is loaded

高洛峰
高洛峰Original
2017-01-12 11:03:041030browse

The example in this article describes the method of JS to determine whether the iframe is loaded. Share it with everyone for your reference, 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 = "http://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 = "http://www.jb51.net/";
if (iframe.attachEvent){
  iframe.attachEvent("onload", function(){
    alert("loaded");
  });
} else {
  iframe.onload = function(){
    alert("loaded");
  };
}
document.body.appendChild(iframe);
</script>
</body>
</html>

I hope this article will be helpful to everyone in JavaScript programming.

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