HTML | onoffline Event Attribute

The onoffline event attribute works when the browser work in offline mode. It is supported by <body> tag only. It is an opposite of ononline event attribute.

Syntax:

<element onoffline = "script">

Attribute Value: The script event is run when onoffline attribute is called.

Example:

<!DOCTYPE html> 
<html> 
    <head> 
        <title>onoffline event attribute</title> 
        <style> 
            h1 { 
                color:green; 
            } 
            body { 
                text-align:center; 
            } 
        </style> 
    </head> 
    <body onoffline = "gfg()"> 
        <h1>GeeksforGeeks</h1> 
        <h2>onoffline Event Attribute</h2> 
        <script> 
            function gfg() { 
                alert ("Browser working in offline mode"); 
            } 
        </script> 
    </body> 
</html>                     

Output:
onffline event

Supported Browsers: The browser supported by onoofline event attribute are listed below:

Firefox 3.0
Internet Explorer 8.0

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ManasChhabra2

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