BeforeUnloadEvent

package js.html

extends Event

Available on js

The beforeunload event is fired when the window, the document and its resources are about to be unloaded.

Documentation BeforeUnloadEvent by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

https://developer.mozilla.org/en-US/docs/Web/API/BeforeUnloadEvent

Variables

returnValue:String