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Version: 21.0.3

EventEmitter.on() method

Bind an event listener to fire when an event occurs.

Signature:

class EventEmitter {
on(event: EventType, handler: Handler<any>): this;
}

Parameters

ParameterTypeDescription
eventEventTypethe event type you'd like to listen to. Can be a string or symbol.
handlerHandler<any>the function to be called when the event occurs.

Returns:

this

this to enable you to chain method calls.