@braintree/event-emitter

event-emitter

A helper module for creating objects with event emitter capabilities.

Installation

npm

npm install --save @braintree/event-emitter

This module uses commonjs. You must use a build tool such as Browserify or Webpack to include it in your frontend project.

Usage

Creating an Object that Inherits from Event Emitter

var EventEmitter = require("@braintree/event-emitter");

function MyClass() {
  EventEmitter.call(this);
}

MyClass.prototype = EventEmitter.createChild(MyClass);

Listen for events

var obj = new MyClass();

obj.on("event-name", function (data) {
  console.log("called with", data.payload, "!");
});

obj._emit("event-name", { payload: "foo" }); // logs "called with foo!"

Unsubscribe from events

var obj = new MyClass();
var cb = function () {};

obj.on("event-name", cb);
obj.off("event-name", cb);

obj._emit("event-name", { payload: "foo" }); // cb is not called

Tests

npm test

Changelog

0.4.0

• Add typescript types