discord.js/packages/ws/README.md

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## About

`@discordjs/ws` is a powerful wrapper around Discord's gateway.

## Installation

**Node.js 16.9.0 or newer is required.**

```sh-session
npm install @discordjs/ws
yarn add @discordjs/ws
pnpm add @discordjs/ws
```

### Optional packages

- [zlib-sync](https://www.npmjs.com/package/zlib-sync) for WebSocket data compression and inflation (`npm install zlib-sync`)
- [bufferutil](https://www.npmjs.com/package/bufferutil) for a much faster WebSocket connection (`npm install bufferutil`)
- [utf-8-validate](https://www.npmjs.com/package/utf-8-validate) in combination with `bufferutil` for much faster WebSocket processing (`npm install utf-8-validate`)

## Example usage

```ts
import { WebSocketManager, WebSocketShardEvents } from '@discordjs/ws';
import { REST } from '@discordjs/rest';

const rest = new REST().setToken(process.env.DISCORD_TOKEN);
// This example will spawn Discord's recommended shard count, all under the current process.
const manager = new WebSocketManager({
	token: process.env.DISCORD_TOKEN,
	intents: 0, // for no intents
	rest,
});

manager.on(WebSocketShardEvents.Dispatch, (event) => {
	// Process gateway events here.
});

await manager.connect();
```

### Specify shards

```ts
// Spawn 4 shards
const manager = new WebSocketManager({
	token: process.env.DISCORD_TOKEN,
	intents: 0,
	rest,
	shardCount: 4,
});

// The manager also supports being responsible for only a subset of your shards:

// Your bot will run 8 shards overall
// This manager will only take care of 0, 2, 4, and 6
const manager = new WebSocketManager({
	token: process.env.DISCORD_TOKEN,
	intents: 0,
	rest,
	shardCount: 8,
	shardIds: [0, 2, 4, 6],
});

// Alternatively, if your shards are consecutive, you can pass in a range
const manager = new WebSocketManager({
	token: process.env.DISCORD_TOKEN,
	intents: 0,
	rest,
	shardCount: 8,
	shardIds: {
		start: 0,
		end: 4,
	},
});
```

### Specify `worker_threads`

You can also have the shards spawn in worker threads:

```ts
import { WebSocketManager, WorkerShardingStrategy } from '@discordjs/ws';

const manager = new WebSocketManager({
	token: process.env.DISCORD_TOKEN,
	intents: 0,
	rest,
	shardCount: 6,
});

// This will cause 3 workers to spawn, 2 shards per each
manager.setStrategy(new WorkerShardingStrategy(manager, { shardsPerWorker: 2 }));
// Or maybe you want all your shards under a single worker
manager.setStrategy(new WorkerShardingStrategy(manager, { shardsPerWorker: 'all' }));
```

## Links

- [Website][website] ([source][website-source])
- [Documentation][documentation]
- [Guide][guide] ([source][guide-source])
  See also the [Update Guide][guide-update], including updated and removed items in the library.
- [discord.js Discord server][discord]
- [Discord API Discord server][discord-api]
- [GitHub][source]
- [npm][npm]
- [Related libraries][related-libs]

## Contributing

Before creating an issue, please ensure that it hasn't already been reported/suggested, and double-check the
[documentation][documentation].  
See [the contribution guide][contributing] if you'd like to submit a PR.

## Help

If you don't understand something in the documentation, you are experiencing problems, or you just need a gentle
nudge in the right direction, please don't hesitate to join our official [discord.js Server][discord].

[website]: https://discord.js.org/
[website-source]: https://github.com/discordjs/discord.js/tree/main/apps/website
[documentation]: https://discord.js.org/#/docs/ws
[guide]: https://discordjs.guide/
[guide-source]: https://github.com/discordjs/guide
[guide-update]: https://discordjs.guide/additional-info/changes-in-v14.html
[discord]: https://discord.gg/djs
[discord-api]: https://discord.gg/discord-api
[source]: https://github.com/discordjs/discord.js/tree/main/packages/ws
[npm]: https://www.npmjs.com/package/@discordjs/ws
[related-libs]: https://discord.com/developers/docs/topics/community-resources#libraries
[contributing]: https://github.com/discordjs/discord.js/blob/main/.github/CONTRIBUTING.md