BeforeUnloadEvent object (Windows)

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Provides event properties that are specific to the onbeforeunload event.

Event

BeforeUnloadEvent

The BeforeUnloadEvent object has these types of members:

The BeforeUnloadEvent object has these methods.

Method	Description
initEvent	Initializes a new generic event that the createEvent method created.
preventDefault	Cancels the default action of an event.
stopImmediatePropagation	Prevents any further propagation of an event.
stopPropagation	Prevents propagation of an event beyond the current target.

The BeforeUnloadEvent object has these properties.

Property	Description
bubbles	Gets a value that indicates whether an event propagates up from the event target.
cancelable	Gets a value that indicates whether you can cancel an event's default action.
cancelBubble	Gets or sets a value that indicates whether an event should be stopped from propagating up from the current target.
currentTarget	Gets the event target that is currently being processed.
defaultPrevented	Gets a value that indicates whether the default action should be canceled.
eventPhase	Gets the event phase that is being evaluated.
isTrusted	Gets a value that indicates whether a trusted event source created an event.
returnValue	Gets or sets a value that indicates whether to warn the user prior to navigating away from a page.
srcElement	Gets the element that the event was originally dispatched to. Compare to target.
target	Gets the element that is the target of the event.
timeStamp	Gets the time, in milliseconds, when an event occurred.
type	Gets the name of an event.

BeforeUnloadEvent object