onbeforeunload (HTML attribute)

Syntax

onbeforeunload="waveByeBye();"

Description

This attribute captures the moment just before a page is unloaded, immediately before the (standard) onunload event.

Value

No fixed value - could be a call to one or more defined functions or a simple alert() statement.

Compatibility

Non-standard event defined by Microsoft for use in Internet Explorer. May work in some other browsers but cannot be reliably used. Compatibility for this non-standard attribute not tested.

User-contributed notes

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