Handle your component effects and side-effects in a clear and declarative fashion
by using asynchronous data streams (reactive programming).

Why?InstallThe GistLearnContributeDiscuss

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  • 馃幊 Decentralised: attach effects and side-effects to your components, for better code splitting results
  • 馃寘 Gradual: use on an existing component today, throughout your app tomorrow
  • 馃殌 Reactive: leverage the power and benefits of reactive programming
  • 馃捑 Tiny: less than 2Kb minified and gzipped
  • Typed: written in TypeScript, fully typed integrations
  • Universal: supports React, React Native, Inferno and Preact

Refract makes reactive programming possible in React, React Native, Preact and Inferno, with only a single higher-order component or a single hook! You can choose to start using a tiny bit of reactive programming, or go full reactive. Refract allows you to:

We also provide a Redux integration, which can serve as a template for integrations with other libraries. With a single HoC, you can fully replace libraries like recompose, redux-observable, and react-redux to name a few!


Component-based architecture and functional programming have become an increasingly popular approach for building UIs. They help make apps more predictable, more testable, and more maintainable.

However, our apps don't exist in a vacuum! They need to handle state, make network requests, handle data persistence, log analytics, deal with changing time, and so on. Any non-trivial app has to handle any number of these effects. Wouldn't it be nice to cleanly separate them from our apps?

Refract solves this problem for you, by harnessing the power of reactive programming. For an in-depth introduction, head to Why Refract.


Refract is available for a number of reactive programming libraries. For each library, a Refract integration is available for React, Inferno, Preact and Redux.

Available packages:

React Inferno Preact Redux
Callbag refract-callbag refract-inferno-callbag refract-preact-callbag refract-redux-callbag
Most refract-most refract-inferno-most refract-preact-most refract-redux-most
RxJS refract-rxjs refract-inferno-rxjs refract-preact-rxjs refract-redux-rxjs
xstream refract-xstream refract-inferno-xstream refract-preact-xstream refract-redux-xstream

To use the latest stable version, simply npm install the package you want to use:

npm install --save refract-rxjs

The Gist

The example below uses refract-rxjs to send data to localstorage.

Every time the username prop changes, its new value is sent into the stream. The stream debounces the input for two seconds, then maps it into an object (with a type of localstorage) under the key value. Each time an effect with the correct type is emitted from this pipeline, the handler calls localstorage.setItem with the effect's name and value properties.

const aperture = component => {
    return component.observe('username').pipe(
        map(username => ({
            type: 'localstorage',
            name: 'username',
            value: username

const handler = initialProps => effect => {
    switch (effect.type) {
        case 'localstorage':
            localstorage.setItem(effect.name, effect.value)

const WrappedComponent = withEffects(aperture, { handler })(BaseComponent)

The example demonstrates uses the two building blocks used with Refract - an aperture and a handler - and shows how they can be integrated into a React component via the withEffects higher-order component.


An aperture controls the streams of data entering Refract. It is a function which observes data sources within your app, passes this data through any necessary logic flows, and outputs a stream of effect values in response.


A handler is a function which causes side-effects in response to effect values.

Learn Refract


Documentation is available at refract.js.org. We aim to provide a helpful and thorough documentation: all documentation files are located on this repo and we welcome any pull request helping us achieve that goal.


We maintain and will grow over time a set of examples to illustrate the potential of Refract, as well as providing reactive programming examples: refract.js.org/examples.

Examples are illustrative and not the idiomatic way to use Refract. Each example is available for the four reactive libraries we support (RxJS, xstream, Most and Callbag), and we provide links to run the code live on codesandbox.io. All examples are hosted on this repo, and we welcome pull requests helping us maintaining them.



We welcome many forms of contribution from anyone who wishes to get involved.

Before getting started, please read through our contributing guidelines and code of conduct.


The Refract logo is available in the Logo directory.


Refract is available under the MIT license.


Everyone is welcome to join our discussion channel - #refract on the Reactiflux Discord server.




Harness the power of reactive programming to supercharge your components

Refract Info

猸 Stars805
馃敆 Homepagerefract.js.org
馃敆 Source Codegithub.com
馃晵 Last Update10 months ago
馃晵 Created5 years ago
馃悶 Open Issues4
鉃 Star-Issue Ratio201
馃槑 Authorfanduel-oss