This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.
The FocusEvent()
constructor returns a newly created FocusEvent
object with an optional EventTarget
. When a change a focus has a source and a destination, the relatedTarget value must be set to the other target.
var focusEvent = new FocusEvent(typeArg, focusEventInit);
The FocusEvent()
constructor also inherits arguments from UIEvent()
and from Event()
.
typeArg
DOMString
representing the name of the event.focusEventInit
Optional
FocusEventInit
dictionary, having the following fields: "relatedTarget"
, optional and defaulting to null
, is an EventTarget
representing the secondary target of a FocusEvent
.The FocusEventInit
dictionary also accepts fields from the UIEventInit
and EventInit
dictionaries.
Specification | Status | Comment |
---|---|---|
Document Object Model (DOM) Level 3 Events Specification The definition of 'FocusEvent()' in that specification. | Working Draft | Initial definition |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | 24.0 (24.0) | Not supported | (Yes) | (Yes) |
Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | 24.0 (24.0) | Not supported | (Yes) | (Yes) |
FocusEvent
interface it belongs to.
© 2005–2017 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/FocusEvent/FocusEvent