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Flexible and simple session management for Backbone apps
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backbone-session Build Status

Flexible and simple session management for Backbone apps


// Using CommonJS
var Session = require('backbone-session');

// or AMD
define(['backbone-session'], function (Session) {
  // ...

// Extend from Session to implement your API's behaviour
var Account = Session.extend({
  signIn: function () {},
  signOut: function () {},
  getAuthStatus: function () {}

// Using the custom Account implementation
var session = new Account();
  .then(function () {
    console.log('Logged in as %s', session.get('name'));
  .fail(function () {
    console.log('Not yet logged in!');


Using a simple facade that feels more Backboney helps avoid third party SDKs and APIs leaking into your app code. Your app will be less locked-in to your authentication provider.

Backbone Session uses the localStorage API to cache tokens and user profile information.

How do I use Backbone Session?

Backbone Session is merely a facade, or interface. It's up to you to implement its methods to do what your API requires.

Many Backbone apps will have a singleton app object that tracks state. That's a good place to keep your Backbone Session instance.

Backbone Session implementations can be synchronous or asynchronous. For the sake of consistency, it is recommended to use Promises even with a syncronous implementation.


Backbone Session inherits all of Backbone Models's methods and properties.

It overrides and extends the following interfaces:


Default: Backbone.Session

Either a Function or a String that represents the key used to access localStorage. If a Function, its return value will be the key.


Returns: jQuery Promise


  username: '',
  password: 'hunter2'
}).then(function () {
  // Do stuff after logging in ...
}).fail(function () {
  // Handle the failed log in attempt ...


Returns: jQuery Promise


session.signOut().then(function () {
  // Now the user is logged out ...


Returns: jQuery Promise


.then(function () {
  // The user is already logged in ...
.fail(function () {
  // The user is not yet logged in ...

Model & Collection

A basic Backbone Model and Collection to extend and inherit from. Session implementations can replace them with a patched Model or Collection to seamlessly handle network authentication, error handling, logging, etc. Session consumers should extend their models from this base.


// Session implementation
var MyAPI = Backbone.Session.extend({
  Model: Backbone.Model.extend({
    sync: function () {
      return Backbone.Model.sync.apply(this, arguments);

// Session consumer
var session = new MyAPI();
var MyModel = session.prototype.Model.extend({
  url: '/foo/bar'

var item = new MyModel();
item.fetch(); // prints: Syncing...



bower install backbone-session


npm install backbone-session



"dependencies": {
  "backbone-session": ""


<script src="backbone-session.js"></script>


MIT License

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