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Editorial Team
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Asked: 2026-06-04T10:33:09+00:00

I am using the fancybox plugin to open up an html file in the

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I am using the fancybox plugin to open up an html file in the fancybox popup. How do I access the external html files width and height using javascript/jquery. My external html looks something like this:

<html>
<head>
<style type="text/css">
body {
  width:500px;
  height:500px;
  background-color:red;
}
</style>
</head>

<body>
<p>TEXT_TEXT_TEXT</p>
</body>
</html>
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1 Answer

  1. Editorial Team

    I guess FancyBox will load the html file in iFrame, then it would be something like that:

    This goes to your html file (which is being used in iframe):

    window.myFunction = function(width, height) {
 //change body width
 //change body height
}

    And like that you can access the function in iframe

    document.getElementById('YOURFRAMEIDHERE').contentWindow.myFunction(args);
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