CustomEmitter

CustomEmitter

function CustomEmitter() {
  this.events = {};
}

CustomEmitter.prototype.on = function (type, listener) {
  // error handling
  this.events[type] = [];
  this.events[type].push(listener);
};

CustomEmitter.prototype.emit = function (type, value) {
  if (this.events[type]) {
    this.events[type].forEach(function (listener) {
      listener(value);
    });
  }
};

const emit = new CustomEmitter();
emit.on("mess", (data) => {console.log(data)})
emit.emit("mess", "hiiii");