Readonly AT_Readonly BUBBLING_Readonly CAPTURING_Readonly NONEReadonly bubblesReturns true or false depending on how event was initialized. True if event goes through its target's ancestors in reverse tree order, and false otherwise.
Readonly cancelableReturns true or false depending on how event was initialized. Its return value does not always carry meaning, but true can indicate that part of the operation during which event was dispatched, can be canceled by invoking the preventDefault() method.
Readonly composedReturns true or false depending on how event was initialized. True if event invokes listeners past a ShadowRoot node that is the root of its target, and false otherwise.
Protected constructorReadonly currentReturns the object whose event listener's callback is currently being invoked.
Readonly defaultReturns true if preventDefault() was invoked successfully to indicate cancelation, and false otherwise.
Readonly detailReadonly eventReturns the event's phase, which is one of NONE, CAPTURING_PHASE, AT_TARGET, and BUBBLING_PHASE.
Readonly isReturns true if event was dispatched by the user agent, and false otherwise.
Readonly srcReadonly targetReturns the object to which event is dispatched (its target).
Readonly timeReturns the event's timestamp as the number of milliseconds measured relative to the time origin.
Readonly typeReturns the type of event, e.g. "click", "hashchange", or "submit".
Static Readonly AT_Static Readonly BUBBLING_Static Readonly CAPTURING_Static Readonly NONEEvents cannot be re-dispatched. This was probably to prevent infinite loops. So instead of re-dispatching the same instance, we re-dispatch a clone of the instance.
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EventError dispatches all unhandled rejections and uncaught exceptions coming out of event handlers. Asynchronous event handlers may produce unhandled rejections. While synchronous event handlers may produce uncaught exceptions.
Note that when an
EventErroris dispatched, even if there's no handler registered for it, it will not result in anEventDefault. Furthermore, it is also not redispatched viaEventAll.This is because
EventErroris a special event that is dispatched when an exception is thrown in an event handler. It does not represent one of the events that the user has in fact dispatched.If there is no event handler for
EventError, the exception will be thrown to become an uncaught exception. This may crash the program unless you have registered a global uncaught exception handler.The
detailproperty is ananytype because that's what a thrown value can be.