eventemitter listenercount emitter eventname

Stability: 0 - Deprecated: Use [emitter.listenerCount()][] instead.

• emitter {EventEmitter} The emitter to query
• eventName {string|symbol} The event name

A class method that returns the number of listeners for the given eventName registered on the given emitter.

const myEmitter = new EventEmitter();
myEmitter.on('event', () => {});
myEmitter.on('event', () => {});
console.log(EventEmitter.listenerCount(myEmitter, 'event'));
// Prints: 2