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    1.6.0 • Public • Published

    This is a YouView specific fork of https://github.com/ReactiveX/RxJS

    The fork is intended to provide a middle ground when transitioning from RxJs V4 to RxJs V5.

    • Renamed methods have an alias with the old name
    • Operators that have the same name but the behavior/arguments changed have been modified to match rxjs v4
    • Some removed operators have been re implemented
    • Static methods also ported over. Disposables, TestScheduler
    • Code changes have been commented with // v4-backwards-compatibility

    RxJS 5

    Reactive Extensions Library for JavaScript. This is a rewrite of Reactive-Extensions/RxJS and is the latest production-ready version of RxJS. This rewrite is meant to have better performance, better modularity, better debuggable call stacks, while staying mostly backwards compatible, with some breaking changes that reduce the API surface.

    Apache 2.0 License

    Versions In This Repository

    • master - commits that will be included in the next major release (breaking changes)
    • next - commits that will be included in the next minor or patch release

    Most PRs should be made to master, unless you know it is a breaking change.


    By contributing or commenting on issues in this repository, whether you've read them or not, you're agreeing to the Contributor Code of Conduct. Much like traffic laws, ignorance doesn't grant you immunity.

    Installation and Usage

    ES6 via npm

    npm install rxjs

    To import the entire core set of functionality:

    import Rx from 'rxjs/Rx';

    To import only what you need by patching (this is useful for size-sensitive bundling):

    import { Observable } from 'rxjs/Observable';
    import 'rxjs/add/observable/of';
    import 'rxjs/add/operator/map';
    Observable.of(1,2,3).map(x => x + '!!!'); // etc

    To import what you need and use it with proposed bind operator:

    Note: This additional syntax requires transpiler support and this syntax may be completely withdrawn from TC39 without notice! Use at your own risk.

    import { Observable } from 'rxjs/Observable';
    import { of } from 'rxjs/observable/of';
    import { map } from 'rxjs/operator/map';
    Observable::of(1,2,3)::map(x => x + '!!!'); // etc

    CommonJS via npm

    To install this library for CommonJS (CJS) usage, use the following command:

    npm install rxjs

    Import all core functionality:

    var Rx = require('rxjs/Rx');
    Rx.Observable.of(1,2,3); // etc

    Import only what you need and patch Observable (this is useful in size-sensitive bundling scenarios):

    var Observable = require('rxjs/Observable').Observable;
    // patch Observable with appropriate methods
    Observable.of(1,2,3).map(function (x) { return x + '!!!'; }); // etc

    Import operators and use them manually you can do the following (this is also useful for bundling):

    var of = require('rxjs/observable/of').of;
    var map = require('rxjs/operator/map').map;
    map.call(of(1,2,3), function (x) { return x + '!!!'; });

    You can also use the above method to build your own Observable and export it from your own module.

    All Module Types (CJS/ES6/AMD/TypeScript) via npm

    To install this library via npm version 3, use the following command:

    npm install @reactivex/rxjs

    This will include CJS/Global builds and can be used for all module types.

    If you are using npm version 2 before this library has achieved a stable version, you need to specify the library version explicitly:

    npm install @reactivex/rxjs@5.0.0


    For CDN, you can use unpkg:


    Node.js Usage:

    var Rx = require('@reactivex/rxjs');
    Rx.Observable.of('hello world')
      .subscribe(function(x) { console.log(x); });


    • Provide better performance than preceding versions of RxJS
    • To model/follow the Observable Spec Proposal to the observable.
    • Provide more modular file structure in a variety of formats
    • Provide more debuggable call stacks than preceding versions of RxJS


    The build and test structure is fairly primitive at the moment. There are various npm scripts that can be run:

    • build_es6: Transpiles the TypeScript files from src/ to dist/es6
    • build_cjs: Transpiles the ES6 files from dist/es6 to dist/cjs
    • build_amd: Transpiles the ES6 files from dist/es6 to dist/amd
    • build_global: Transpiles/Bundles the CommonJS files from dist/cjs to dist/global/Rx.js
    • build_all: Performs all of the above in the proper order.
    • build_perf: builds ES6, CommonJS, then global, then runs the performance tests with protractor
    • build_docs: generates API documentation from dist/es6 to dist/docs
    • build_cover: runs istanbul code coverage against test cases
    • test: runs tests with mocha
    • tests2png: generates PNG marble diagrams from test cases.

    npm run info will list available script.


    # build all the things! 
    npm run build_all

    Performance Tests

    Run npm run build_perf or npm run perf to run the performance tests with protractor.

    Run npm run perf_micro [operator] to run micro performance test benchmarking operator.

    Adding documentation

    RxNext uses ESDoc to generate API documentation. Refer to ESDoc's documentation for syntax. Run npm run build_docs to generate.

    Generating PNG marble diagrams

    The script npm run tests2png requires some native packages installed locally: imagemagick, graphicsmagick, and ghostscript.

    For Mac OS X with Homebrew:

    • brew install imagemagick
    • brew install graphicsmagick
    • brew install ghostscript
    • You may need to install the Ghostscript fonts manually:
      • Download the tarball from the gs-fonts project
      • mkdir -p /usr/local/share/ghostscript && tar zxvf /path/to/ghostscript-fonts.tar.gz -C /usr/local/share/ghostscript

    For Debian Linux:

    • sudo add-apt-repository ppa:dhor/myway
    • apt-get install imagemagick
    • apt-get install graphicsmagick
    • apt-get install ghostscript

    For Windows and other Operating Systems, check the download instructions here:


    npm i @acutmore/rxjs

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