Get IFrame's document, from JavaScript in main document

user_175908 0
Viewed 174731

I have this HTML code:

<html>
  <head>
    <script type="text/javascript">
      function GetDoc(x)
      {
        return x.document ||
          x.contentDocument ||
          x.contentWindow.document;
      }

      function DoStuff()
      {
        var fr = document.all["myframe"];
        while(fr.ariaBusy) { }
        var doc = GetDoc(fr);
        if (doc == document)
          alert("Bad");
        else 
          alert("Good");
      }
    </script>
  </head>
  <body>
    <iframe id="myframe" src="http://example.com" width="100%" height="100%" onload="DoStuff()"></iframe>
  </body>
</html>

The problem is that I get message "Bad". That mean that the document of iframe is not got correctly, and what is actualy returned by GetDoc function is the parent document.

I would be thankful, if you told where I do my mistake. (I want to get document hosted in IFrame.)

Thank you.

document iframe html javascript
4 Answers

In case you get a cross-domain error:

If you have control over the content of the iframe - that is, if it is merely loaded in a cross-origin setup such as on Amazon Mechanical Turk - you can circumvent this problem with the <body onload='my_func(my_arg)'> attribute for the inner html.

For example, for the inner html, use the this html parameter (yes - this is defined and it refers to the parent window of the inner body element):

<body onload='changeForm(this)'>

In the inner html : 

    function changeForm(window) {
        console.log('inner window loaded: do whatever you want with the inner html');
        window.document.getElementById('mturk_form').style.display = 'none';
    </script>
user_38535370

You can also use:

document.querySelector('iframe').contentDocument
user_145187730
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