redoc/docs/deployment/react.md

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---
seo:
title: Use the Redoc React component
redirects:
'/docs/redoc/quickstart/react/':
to: '/docs/redoc/deployment/react/'
---
# How to use the Redoc React component
## Before you start
Install the following dependencies required by Redoc if you do not already have them installed:
- `react`
- `react-dom`
- `mobx`
- `styled-components`
- `core-js`
If you have npm installed, you can install these dependencies using the following command:
```js
npm i react react-dom mobx styled-components core-js
```
## Step 1 - Import the `RedocStandalone` component
```js
import { RedocStandalone } from 'redoc';
```
## Step 2 - Use the component
You can either link to your OpenAPI definition with a URL, using the following format:
```react
<RedocStandalone specUrl="url/to/your/spec"/>
```
Or you can pass your OpenAPI definition as an object, using the following format:
```js
<RedocStandalone spec={/* spec as an object */}/>
```
## Optional - Pass options
Options can be passed into the RedocStandalone component to alter how it renders.
For example:
```js
<RedocStandalone
specUrl="http://petstore.swagger.io/v2/swagger.json"
options={{
nativeScrollbars: true,
theme: { colors: { primary: { main: '#dd5522' } } },
}}
/>
```
For more information on configuration options, refer to the
[Configuration options for Reference docs](https://redocly.com/docs/api-reference-docs/configuration/functionality/)
section of the documentation. Options available for Redoc are noted,
"Supported in Redoc CE".
## Optional - Specify `onLoaded` callback
You can also specify the `onLoaded` callback, which is called each time Redoc
is fully rendered or when an error occurs (with an error as the first argument).
```js
<RedocStandalone
specUrl="http://petstore.swagger.io/v2/swagger.json"
onLoaded={(error) => {
if (!error) {
console.log('Yay!');
}
}}
/>
```