Tutorials References Exercises Bootcamp Menu
Sign Up Create Website Get Certified Pro

HTML onoffline Event Attribute

❮ HTML Event Attributes


Execute a JavaScript when the browser starts to work offline:

<body onoffline="myFunction()">
Try it Yourself »

Definition and Usage

The onoffline attribute fires when the browser starts to work offline.

Tip: The onoffline attribute is the opposite of the ononline attribute.

Browser Support

The numbers in the table specify the first browser version that fully supports the event attribute.

Event Attribute
onoffline Not supported Deprecated as of IE11
3.0 Not supported Not supported


<element onoffline="script">

Attribute Values

Value Description
script The script to be run on onoffline

Technical Details

Supported HTML tags: <body>

Related Pages

HTML DOM reference: onoffline event

❮ HTML Event Attributes