addListener method

Event addListener(
  1. EventFunction listener
)

Adds a synchronous listener to the event. Synchronous listeners are called immediately and should complete quickly. They are executed before any asynchronous listeners. Parameters:

  • listener - The function to call when the event is emitted Returns this Event instance for method chaining. Example:
event.addListener((data) => print('Event: $data'))
     .addListener((data) => updateCounter());

Implementation

Event addListener(EventFunction listener) {
  _listeners.add(listener);
  return this;
}