Web/API/WindowEventHandlers

From Get docs


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 EventHandler representing the code to be called when the afterprint event is raised.
WindowEventHandlers.onbeforeprint
Is an EventHandler representing the code to be called when the beforeprint event is raised.
WindowEventHandlers.onbeforeunload
Is an EventHandler representing the code to be called when the beforeunload event is raised.
WindowEventHandlers.onhashchange
Is an EventHandler representing the code to be called when the hashchange event is raised.
WindowEventHandlers.onlanguagechange '
Is an EventHandler representing the code to be called when the languagechange event is raised.
WindowEventHandlers.onmessage
Is an EventHandler representing the code to be called when the message event is raised.
WindowEventHandlers.onmessageerror
Is an EventHandler representing the code to be called when the MessageError event is raised.
WindowEventHandlers.onoffline
Is an EventHandler representing the code to be called when the offline event is raised.
WindowEventHandlers.ononline
Is an EventHandler representing the code to be called when the online event is raised.
WindowEventHandlers.onpagehide
Is an EventHandler representing the code to be called when the pagehide event is raised.
WindowEventHandlers.onpageshow
Is an EventHandler representing the code to be called when the pageshow event is raised.
WindowEventHandlers.onpopstate
Is an EventHandler representing the code to be called when the popstate event is raised.
WindowEventHandlers.onrejectionhandled
Is an EventHandler 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 EventHandler representing the code to be called when the storage event is raised.
WindowEventHandlers.onunhandledrejection
Is an EventHandler 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 EventHandler representing the code to be called when the unload event is raised.

Methods

This interface defines no method.

Specifications

Specification Status Comment
HTML Living StandardThe definition of 'WindowEventHandlers' in that specification. Living Standard No change since the latest snapshot, HTML 5.1.
HTML 5.1The definition of 'WindowEventHandlers' in that specification. Recommendation Snapshot of HTML Living Standard. Added onlanguage since the HTML5 snapshot.
HTML5The definition of 'WindowEventHandlers' in that specification. Recommendation Snapshot of HTML Living Standard. Creation of WindowEventHandlers (properties where on the target before it).

Browser compatibility

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
WindowEventHandlers Chrome

Full support Yes

Edge

Full support 12

Firefox

Full support Yes

IE

Full support Yes

Opera

Full support Yes

Safari

Full support Yes

WebView Android

Full support Yes

Chrome Android

Full support Yes

Firefox Android

Full support Yes

Opera Android

Full support Yes

Safari iOS

Full support Yes

Samsung Internet Android

Full support Yes

onafterprint Chrome

Full support 63

Edge

Full support 12

Firefox

Full support 6

IE

Full support Yes

Opera

Full support 50

Safari

Full support 13

WebView Android

Full support 63

Chrome Android

Full support 63

Firefox Android

?

Opera Android

Full support 46

Safari iOS

Full support 13

Samsung Internet Android

Full support 8.0

onbeforeprint Chrome

Full support 63

Edge

Full support 12

Firefox

Full support 6

IE

Full support Yes

Opera

Full support 50

Safari

Full support 13

WebView Android

Full support 63

Chrome Android

Full support 63

Firefox Android

?

Opera Android

Full support 46

Safari iOS

Full support 13

Samsung Internet Android

Full support 8.0

onbeforeunload Chrome

Full support 1

Edge

Full support 12

Firefox

Full support 1

IE

Full support 4

Opera

Full support 12

Safari

Full support 3

WebView Android

Full support 1

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android

Full support 12

Safari iOS

Full support 1

Samsung Internet Android

Full support 1.0

onhashchange Chrome

Full support 5

Edge

Full support 12

Firefox

Full support 3.6

IE

Full support 8

Opera

Full support 10

Safari

Full support 5

WebView Android

Full support ≤37

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android

Full support 10.1

Safari iOS

Full support 5

Samsung Internet Android

Full support 1.0

onlanguagechange

Experimental'

Chrome

Full support 37

Edge

Full support ≤79

Firefox

Full support 32

IE

No support No

Opera

Full support 24

Safari

?

WebView Android

Full support 37

Chrome Android

Full support 37

Firefox Android

Full support 4

Opera Android

Full support 24

Safari iOS

?

Samsung Internet Android

Full support 4.0

onmessage Chrome

Full support 60

Edge

Full support ≤79

Firefox

?

IE

?

Opera

Full support 47

Safari

?

WebView Android

Full support 60

Chrome Android

Full support 60

Firefox Android

?

Opera Android

Full support 44

Safari iOS

?

Samsung Internet Android

Full support 8.0

onmessageerror Chrome

Full support 60

Edge

Full support ≤79

Firefox

Full support 57

IE

?

Opera

Full support 47

Safari

?

WebView Android

Full support 60

Chrome Android

Full support 60

Firefox Android

Full support 57

Opera Android

Full support 44

Safari iOS

?

Samsung Internet Android

Full support 8.0

onpopstate Chrome

Full support 5

Edge

Full support 12

Firefox

Full support 4

IE

Full support 10

Opera

Full support 11.5

Safari

Full support 6

WebView Android

Full support 37

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android

Full support 11.5

Safari iOS

Full support 5.1

Samsung Internet Android

Full support 1.0

onrejectionhandled Chrome

Full support 49

Edge

Full support ≤79

Firefox Full support 69


Full support 69


Full support 68

Disabled'

Disabled' From version 68: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config. Partial support 55

Notes' Disabled'

Notes' 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. Disabled' From version 55: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

IE

No support No

Opera

Full support 36

Safari

Full support 11

WebView Android

Full support 49

Chrome Android

Full support 49

Firefox Android Full support 68

Disabled'

Full support 68

Disabled'

Disabled' From version 68: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config. Partial support 55

Notes' Disabled'

Notes' 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. Disabled' From version 55: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

Opera Android

No support No

Safari iOS

Full support 11.3

Samsung Internet Android

Full support 5.0

onstorage Chrome

Full support 1

Edge

Full support ≤18

Firefox

Full support 45

IE

?

Opera

Full support 15

Safari

?

WebView Android

Full support ≤37

Chrome Android

Full support 18

Firefox Android

Full support 45

Opera Android

Full support 14

Safari iOS

?

Samsung Internet Android

Full support 1.0

onunhandledrejection Chrome

Full support 49

Edge

Full support ≤79

Firefox Full support 69


Full support 69


Full support 68

Disabled'

Disabled' From version 68: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config. Partial support 55

Notes' Disabled'

Notes' 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. Disabled' From version 55: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

IE

No support No

Opera

Full support 36

Safari

Full support 11

WebView Android

Full support 49

Chrome Android

Full support 49

Firefox Android Full support 68

Disabled'

Full support 68

Disabled'

Disabled' From version 68: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config. Partial support 55

Notes' Disabled'

Notes' 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. Disabled' From version 55: this feature is behind the dom.promise_rejection_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

Opera Android

No support No

Safari iOS

Full support 11.3

Samsung Internet Android

Full support 5.0

onunload Chrome

Full support Yes

Edge

Full support 12

Firefox

Full support Yes

IE

Full support Yes

Opera

Full support Yes

Safari

Full support Yes

WebView Android

Full support Yes

Chrome Android

Full support Yes

Firefox Android

Full support Yes

Opera Android

Full support Yes

Safari iOS

Full support Yes

Samsung Internet Android

Full support Yes

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.'
Experimental. Expect behavior to change in the future.
See implementation notes.'
See implementation notes.
User must explicitly enable this feature.'
User must explicitly enable this feature.


See also