(method) EventEmitter.EventEmitter.listenerCount(emitter: events.EventEmitter, event: string | symbol): number @deprecated — since v4.0.0 code example
Example 1: node js event emitter
const EventEmitter = require('events');
class MyEmitter extends EventEmitter {
foo() {
this.emit('test');
}
}
const myEmitter = new MyEmitter();
myEmitter.on('test', () => console.log('Yay, it works!'));
myEmitter.foo();
Example 2: eventemitter nodejs
myEmitter.on('status', (code, msg)=> console.log(`Got ${code} and ${msg}`));