This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
CustomEvent.initCustomEvent() method initializes a
CustomEvent object. If the event has already been dispatched, this method does nothing.
Events initialized in this way must have been created with the
Document.createEvent() method. This method must be called to set the event before it is dispatched, using
EventTarget.dispatchEvent(). Once dispatched, it doesn't do anything anymore.
Do not use this method anymore, as it is deprecated.
event.initCustomEvent(type, canBubble, cancelable, detail);
- Is a
DOMStringcontaining the name of the event.
- Is a
Booleanindicating whether the event bubbles up through the DOM or not.
- Is a
Booleanindicating whether the event is cancelable.
- The data passed when initializing the event.
The definition of 'CustomEvent' in that specification.
|Living Standard||Initial definition, but already deprecated in favor of the use of a constructor,
|Feature||Chrome||Edge||Firefox (Gecko)||Internet Explorer||Opera||Safari (WebKit)|
|Basic support||(Yes)||(Yes)||6 (6)||9||11||5.1 (533.3)|
|Feature||Android Webview||Chrome for Android||Edge||Firefox Mobile (Gecko)||IE Phone||Opera Mobile||Safari Mobile|
|Basic support||(Yes)||(Yes)||(Yes)||6.0 (6)||?||?||?|
 Starting in Chrome 59,
detail are optional parameters defaulting to