> ## Documentation Index
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# sendToClient

> Send a packet to a single client via the unreliable data channel. The packet will be framed with the server's configured magic terminator bytes before being sent.

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# sendToClient

## Summary

Send a packet to a single client via the unreliable data channel. The packet will be framed with the server's configured magic terminator bytes before being sent.

## Signature

```typescript theme={null}
sendToClient(clientId: number, data: Uint8Array): void;
```

## Parameters

### clientId

**Type**:`number`

Numeric client identifier returned by listen() events

### data

**Type**:`Uint8Array`

Raw packet bytes (Uint8Array) to send

## Returns

**Type**:`void`

Send a packet to a single client via the unreliable data channel. The packet will be framed with the server's configured magic terminator bytes before being sent.