HTML onoffline Event Attribute

HTML Event Attributes : Execute a JavaScript when the browser starts to work offline

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.

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 8.0	3.0	Not supported	Not supported

<element onoffline="script">

Value	Description
script	The script to be run on onoffline

Supported HTML tags:	<body>

HTML DOM reference: onoffline event

❮ HTML Event Attributes

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