WindowEventHandlers

The WindowEventHandlers mixin describes the event handlers common to several interfaces like Window, or HTMLBodyElement and HTMLFrameSetElement. Each of these interfaces can implement additional specific event handlers.

Note: WindowEventHandlers is a mixin and not an interface; you can't actually create an object of type WindowEventHandlers.

Properties

The events properties, of the form onXYZ, are defined on the WindowEventHandlers, and implemented by Window, and WorkerGlobalScope for Web Workers.

WindowEventHandlers.onafterprint

Is an event handler representing the code to be called when the afterprint event is raised.

WindowEventHandlers.onbeforeprint

Is an event handler representing the code to be called when the beforeprint event is raised.

WindowEventHandlers.onbeforeunload

Is an event handler representing the code to be called when the beforeunload event is raised.

WindowEventHandlers.onhashchange

Is an event handler representing the code to be called when the hashchange event is raised.

WindowEventHandlers.onlanguagechange

Is an event handler representing the code to be called when the languagechange event is raised.

WindowEventHandlers.onmessage

Is an event handler representing the code to be called when the message event is raised.

WindowEventHandlers.onmessageerror

Is an event handler representing the code to be called when the MessageError event is raised.

WindowEventHandlers.onoffline

Is an event handler representing the code to be called when the offline event is raised.

WindowEventHandlers.ononline

Is an event handler representing the code to be called when the online event is raised.

WindowEventHandlers.onpagehide

Is an event handler representing the code to be called when the pagehide event is raised.

WindowEventHandlers.onpageshow

Is an event handler representing the code to be called when the pageshow event is raised.

WindowEventHandlers.onpopstate

Is an event handler representing the code to be called when the popstate event is raised.

WindowEventHandlers.onrejectionhandled

Is an event handler representing the code to be called when the rejectionhandled event is raised, indicating that a Promise was rejected and the rejection has been handled.

WindowEventHandlers.onstorage

Is an event handler representing the code to be called when the storage event is raised.

WindowEventHandlers.onunhandledrejection

Is an event handler representing the code to be called when the unhandledrejection event is raised, indicating that a Promise was rejected but the rejection was not handled.

WindowEventHandlers.onunload

Is an event handler representing the code to be called when the unload event is raised.

Methods

This interface defines no method.

Specifications

Specification
HTML Standard (HTML)
# windoweventhandlers

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
WindowEventHandlers
1
12
1
4
≤12.1
3
1
18
4
≤12.1
1
1.0
onafterprint
63
12
6
≤6
50
13
63
63
?
46
13
8.0
onbeforeprint
63
12
6
≤6
50
13
63
63
?
46
13
8.0
onbeforeunload
1
12
1
4
12
3
1
18
4
12
1
1.0
onhashchange
5
12
3.6
8
10
5
≤37
18
4
10.1
5
1.0
onlanguagechange
37
≤79
32
No
24
10.1
37
37
4
24
10.3
4.0
onmessage
60
12
9
8
47
4
60
60
9
44
4
8.0
onmessageerror
60
18
57
No
47
No
60
60
57
44
No
8.0
onpopstate
5
12
4
10
11.5
5
37
18
4
11.5
4.2
1.0
onrejectionhandled
49
≤79
69
68
55
This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 and enabled by default in Firefox 69.
No
36
11
49
49
68
55
This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 but not enabled by default.
No
11.3
5.0
onstorage
1
15
45
9
15
4
≤37
18
45
14
4
1.0
onunhandledrejection
49
79
69
68
55
This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 and enabled by default in Firefox 69.
No
36
11
49
49
68
55
This event handler was added in Firefox 55 but was disabled since it wasn't fully implemented. It was fully implemented in Firefox 68 but not enabled by default.
No
11.3
5.0
onunload
1
12
9
≤6
≤12.1
≤4
≤37
18
9
≤12.1
≤3
1.0

See also

© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers