Kefir

Kefir — is an Reactive Programming library for JavaScript inspired by Bacon.js and RxJS with focus on high performance and low memory usage.

For docs visit rpominov.github.io/kefir. See also Deprecated API docs.

Run tests in your browser (gh-pages branch, i.e. last stable version)

Installation

Kefir available as NPM and Bower packages, as well as simple files download.

NPM

npm install kefir

Bower

bower install kefir

Download

See downloads section in the docs.

Also available on jsDelivr.

Browsers support

We don't support IE8 and below, aside from that Kefir should work in any browser.

Flow

The NPM package ships with Flow definitions. So you can do something like this if you use Flow:

// @flow

import Kefir from 'kefir'

function foo(numberStream: Kefir.Observable<number>) {
  numberStream.onValue(x => {
    // Flow knows x is a number here
  });
}

const s = Kefir.constant(5);
// Flow can automatically infer the type of values in the stream and determine
// that `s` is of type Kefir.Observable<number> here.
foo(s);

Development

To build all the things: /dist, docs, tests for browser, etc. run:

grunt
grunt bower # to also install bower packages which needed for docs

To run tests:

npm test