HTML | DOM IFrame contentDocument Property

Last Updated : 30 Sep, 2019

The IFrame contentDocument property in HTML DOM is used to return the document object generated by a frame or 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.contentDocument

Return Value: It returns the reference of the document object. If there is no object available then it returns null.

Example:

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        HTML DOM iframe contentDocument Property  
    </title>  
</head>  
  
<body style="text-align:center;">  
  
    <h1>GeeksforGeeks</h1>  
  
    <h2>  
        HTML DOM iframe contentDocument Property  
    </h2>  
  
    <iframe src="https://ide.geeksforgeeks.org/index.php"
                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 black"; 
        }  
    </script>  
</body>  
  
</html> 

Before Clicking on the Button:
After Clicking on the Button:

Supported Browsers: The browsers supported by HTML DOM IFrame contentDocument property are listed below:

Google Chrome
Internet Explorer
Firefox
Safari
Opera

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