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HTML | DOM IFrame contentWindow Property

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  • Last Updated : 16 Jun, 2022
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The IFrame contentWindow Property in HTML DOM is used to return the Window object generated by an iframe element. It can be used in the host window to access the document object that belongs to a frame or iframe element.



Return Value: It returns reference Window object generated by an iframe element. 



<!DOCTYPE html>
        HTML DOM iframe contentWindow Property
<body style="text-align:center;">
        HTML DOM iframe contentWindow Property
    <button onclick="Geeks()">
        function Geeks() {
            var iframeID = document.getElementById("GFG");
            var iframeCW = (iframeID.contentWindow || iframeID.contentDocument);
            if (iframeCW.document) iframeCW = iframeCW.document;
   = "5px solid red";

  • Before Clicking On Button:


  • After Clicking on Button: 


Supported Browsers: The browsers supported by IFrame contentWindow Property are listed below:

  • Google Chrome 1.0 and above
  • Edge 12.0 and above
  • Firefox 1.0 and above
  • Internet Explorer 5.5 and above
  • Opera 8.0 and above
  • Safari 3.0 and above

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