Library for composing asynchronous and event-based operations in JavaScript

The Reactive Extensions for JavaScript...

...is a set of libraries to compose pull-based collections and LINQ-style query operators in JavaScript

This project has moved to CodePlex and only serves as a mirror.

This set of libraries include:

  • l2o.js - Core LINQ to Objects library
  • ix.js - Interactive Extensions for JavaScript

Coming Soon

Coming Soon

There are multiple ways of getting started with the Interactive Extensions including:

In a Browser:

<script src="l2o.js"></script>
<script src="ix.js"></script>

Installing via NPM:

npm install ix
npm install -g ix

Using in Node.js:

var Ix = require('ix');

Using RxJS with an AMD loader such as Require.js

    'paths': {
        'ix': 'path/to/ix.js'
['ix'], function(Ix) {
    var obs = Ix.Enumerable.returnValue(42);
    obs.subscribe(function (x) { console.log(x); });

IxJS has been thoroughly tested against all major browsers and supports IE6+, Chrome 4+, FireFox 1+, and Node.js v0.4+.

Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. Microsoft Open Technologies would like to thank its contributors, a list of whom are at http://rx.codeplex.com/wikipage?title=Contributors.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.