# Getting Started with the IVS Chat Client Messaging JavaScript SDK
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Before starting, you should be familiar with [Getting Started with Amazon IVS Chat](getting-started-chat.md).

## Add the Package
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Use either:

```
$ npm install --save amazon-ivs-chat-messaging
```

or:

```
$ yarn add amazon-ivs-chat-messaging
```

## React Native Support
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The IVS Chat Client Messaging JavaScript SDK has a `uuid` dependency which uses the `crypto.getRandomValues` method. Since this method is not supported in React Native, you need to install the additional polyfill `react-native-get-random-value` and import it at the top of the `index.js` file:

```
import 'react-native-get-random-values';
import {AppRegistry} from 'react-native';
import App from './src/App';
import {name as appName} from './app.json';

AppRegistry.registerComponent(appName, () => App);
```

## Set Up Your Backend
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This integration requires endpoints on your server that talk to the [Amazon IVS Chat API](https://docs.aws.amazon.com//ivs/latest/ChatAPIReference/Welcome.html). Use the [official AWS libraries](https://aws.amazon.com/developer/tools/) for access to the Amazon IVS API from your server. These libraries are accessible within several languages from the public packages; e.g., [node.js](https://www.npmjs.com/package/aws-sdk), [java](https://github.com/aws/aws-sdk-java), and [go](https://github.com/aws/aws-sdk-go).

Create a server endpoint that talks to the Amazon IVS Chat API [CreateChatToken](https://docs.aws.amazon.com//ivs/latest/ChatAPIReference/API_CreateChatToken.html) operation, to create a chat token for chat users.