Installation

NPM

The Recoil package lives in npm. To install the latest stable version, run the following command:

npm install recoil

Or if you're using yarn:

yarn add recoil

Bundler

Recoil installed via NPM pairs nicely with module bundlers such as Webpack or Rollup.

ES5 support

Recoil builds are not transpiled to ES5, and we do not support the use of Recoil with ES5. If you need to support browsers that do not provide ES6 features natively, you can do so by compiling your code with Babel and using preset @babel/preset-env. However, we do not support this and you may run into problems.

In particular, just like React, Recoil depends on the Map and Set types and other features of ES6. Emulation of these features using polyfills may result in far worse performance.

CDN

Since version 0.0.11, Recoil offers a UMD build that can be directly used in a <script> tag and exposes the symbol Recoil to the global namespace. We recommend linking to a specific version number and build to avoid unexpected breakage from newer versions:

<script src="https://cdn.jsdelivr.net/npm/[email protected]/umd/recoil.production.js"></script>

You can browse all Recoil files on the CDN at jsdelivr.

ESLint

If you are using eslint-plugin-react-hooks in your project. For example, with an eslint config like this:

// previous .eslint config
{
"plugins": [
"react-hooks"
],
"rules": {
"react-hooks/rules-of-hooks": "error",
"react-hooks/exhaustive-deps": "warn"
}
}

It is recommended to add 'useRecoilCallback' to the list of additionalHooks. With this change, ESLint will warn when the dependencies passed to useRecoilCallback() are specified incorrectly and suggests a fix. The format of additionalHooks is a regex string.

// modified .eslint config
{
"plugins": [
"react-hooks"
],
"rules": {
"react-hooks/rules-of-hooks": "error",
"react-hooks/exhaustive-deps": [
"warn", {
"additionalHooks": "useRecoilCallback"
}
]
}
}

Nightly Builds

We build a package once every day based on the current master branch and publish it as the nightly branch on GitHub. You can use this branch via npm:

npm install https://github.com/facebookexperimental/Recoil.git#nightly

or yarn:

yarn add https://github.com/facebookexperimental/Recoil.git#nightly

or add a dependency in package.json and run npm install or yarn:

"recoil": "facebookexperimental/Recoil.git#nightly",