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 kefirjs.github.io/kefir. See also Deprecated API docs.
GitHub license npm version Build Gitter
Kefir available as NPM and Bower packages, as well as simple files download.
npm install kefir
bower install kefir
See downloads section in the docs.
Also available on jsDelivr.
We don't support IE8 and below, aside from that Kefir should work in any browser.
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)
npm run prettify # makes source code pretty (you must run it before a PR could be merged) npm run build-js # builds js bundlers npm run test # runs all the checks npm run test-only # runs only unit tests without other checks npm run test-debug # runs tests with a chrome inspector connected to the node process npm run build-docs # builds the documentation html file