const EventEmitter = require('events').EventEmitter;
const Counter = function (init) {
this.increment = function () {
init++;
this.emit('incremented', init);
}
}
Counter.prototype = new EventEmitter();
const counter = new Counter(10);
const callback = function (count) {
console.log(count);
}
counter.addListener('incremented', callback);
counter.increment(); // 11
counter.increment(); // 12
In the code snippet above, when this is used in this.increment, it refers to the counter object. However, what does the this refer to in this.emit? Does it point to the increment object or the counter object? Additionally, how is the emit function executed?