Parameters
- target: EventTarget
- eventType: string
- handler: EventListenerOrEventListenerObject
- options: boolean | AddEventListenerOptions = {}
Returns boolean
true
if successfully added, or false
if the same handler has
already been added by us, or if the handler is not a valid event listener.
Adds an event listener for the given event name to the given target.
Like EventTarget:addEventListener but it handles
options
object in case the browser does not support those. Does not support thesignal
option unless browser natively supports that.