> For the complete documentation index, see [llms.txt](https://docs.react-async.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.react-async.com/getting-started/installation.md).

# Installation

You can install `react-async` from npm:

```
npm install --save react-async
```

Or if you're using Yarn:

```
yarn add react-async
```

> This package requires `react` as a peer dependency. Please make sure to install that as well. If you want to use the `useAsync` hook, you'll need `react@16.8.0` or later.

## Transpiling for legacy browsers

This project targets the latest ECMAScript version. Our packages on npm do not contain ES5 code for legacy browsers. If you need to target a browser which does not support the latest version of ECMAScript, you'll have to handle transpilation yourself. Usually this will automatically be handled by the framework you use (CRA, Next.js, Gatsby), but sometimes you may need to tweak your Webpack settings to transpile `react-async` with Babel.

To transpile `node_modules` with Babel you need to use a `babel.config.js`, for more information see [Babel's documentation](https://babeljs.io/docs/en/configuration#whats-your-use-case).

In your `webpack.config.js` make sure that the rule for `babel-loader`:

* doesn't exclude `node_modules` from matching via the `exclude` pattern;
* excludes `core-js` as it shouldn't be transpiled;
* is passed the `configFile` option pointing to the `babel.config.js` file.

```
{
  test: /\.(js|jsx)$/,
  exclude: /\/node_modules\/core-js\//,
  use: [{
    loader: 'babel-loader',
    options: {
      configFile: './babel.config.js',
      // Caching is recommended when transpiling node_modules to speed up consecutive builds
      cacheDirectory: true,
    }
  }]
}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.react-async.com/getting-started/installation.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.