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addEventListener
Registers an event listener in the global scope, which will be called
synchronously whenever the event type
is dispatched.
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dispatchEvent
Dispatches an event in the global scope, synchronously invoking any registered event listeners for this event in the appropriate order. Returns false if event is cancelable and at least one of the event handlers which handled this event called Event.preventDefault(). Otherwise it returns true.
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EventTarget
EventTarget is a DOM interface implemented by objects that can receive events and may have listeners for them.
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ProgressEvent
Events measuring progress of an underlying process, like an HTTP request (for an XMLHttpRequest, or the loading of the underlying resource of an ,