HTML onbeforeunload Attribute
Example
<body onbeforeunload="return myFunction()">Meaning
The onbeforeunload attribute is invoked just before a page or object is unloaded from the user agent.
Standard Syntax
<element onbeforeunload="script">Browser Support
Status
Applies to:
The onbeforeunload attribute can be used on the following element:
| Element | Attribute |
|---|---|
| <body> | onbeforeunload |
Attribute Values
| Value | Description |
|---|---|
| script | Specifies the script to be run on onbeforeunload |