HTML | DOM IFrame contentDocument Property

HTML | DOM IFrame contentWindow Property

Last Updated : 06 May, 2025

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.

Syntax:

iframeObject.contentWindow

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

Example:

index.html

<!DOCTYPE html>
<html>
<head>
    <title>
        HTML DOM iframe contentWindow Property
    </title>
</head>
<body style="text-align:center;">
    <h1>GeeksforGeeks</h1>
    <h2> 
        HTML DOM iframe contentWindow Property 
    </h2>
    <iframe src="https://www.geeksforgeeks.org/community"
            id="GFG"
            height="200" 
            width="400">
    </iframe>
    <br>
    <br>
    <button onclick="Geeks()">
        Submit
    </button>
    <script>
        function Geeks() {
            var iframeID = document.getElementById("GFG");
            var iframeCW = (iframeID.contentWindow || iframeID.contentDocument);
            if (iframeCW.document) iframeCW = iframeCW.document;
            iframeCW.body.style.border = "5px solid red";
        }
    </script>
</body>
</html>

</html>

Temporary Note: The HTML iframe syntax is correct, the https://geeksforgeeks.org/community website does not allow itself to be embedded in iframes on other domains. This is due to protective headers (X-Frame-Options, CSP) that prevent clickjacking and preserve content security. As a result, the iframe appears broken, even though the code itself is valid. You can use some other site link to see the output.

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

HTML | DOM IFrame contentDocument Property

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