https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget
There are two important simplifications compared to the specification:
useCapture in addEventListener and
removeEventListener. There is no real capture model.stopPropagation and preventDefault on dispatchEvent.
There is no event target hierarchy. When a listener calls
stopPropagation or preventDefault on an event object, it means that no
more listeners after this one will be called. Same as when the listener
returns false.
Classdesc
A simplified implementation of the W3C DOM Level 2 EventTarget interface.
參閱
https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget
There are two important simplifications compared to the specification:
useCaptureinaddEventListenerandremoveEventListener. There is no real capture model.stopPropagationandpreventDefaultondispatchEvent. There is no event target hierarchy. When a listener callsstopPropagationorpreventDefaulton an event object, it means that no more listeners after this one will be called. Same as when the listener returns false.