Abstract base observer class. Observers are classes which listen to DOM events, do the preliminary
processing and fire events on the
Observers can also add features to the view, for instance by updating its status or marking elements
which need a refresh on DOM events.
isEnabled : Boolean
State of the observer. If it is disabled no events will be fired.
An instance of the view controller.
constructor( view )
checkShouldIgnoreEventFromTarget( domTarget ) → Boolean
Checks whether a given DOM event should be ignored (should not be turned into a synthetic view document event).
Currently, an event will be ignored only if its target or any of its ancestors has the
data-cke-ignore-eventsattribute. This attribute can be used inside the structures generated by
DowncastWriter#createUIElement()to ignore events fired within a UI that should be excluded from CKEditor 5's realms.
domTarget : Node
The DOM event target to check (usually an element, sometimes a text node and potentially sometimes a document, too).
Whether this event should be ignored by the observer.
Disables and destroys the observer, among others removes event listeners created by the observer.
A typical use case for disabling observers is that mutation observers need to be disabled for the rendering. However, a child class may not need to be disabled, so it can implement an empty method.
observe( domElement, name )
Starts observing the given root element.
domElement : HTMLElement
name : String
The name of the root element.