---
title: Update Enabled Features
description: "Configuration 0x0C, server → client."
---

`config` · `0x0C` · **clientbound** (server → client)

Lists the feature flags (for example `minecraft:vanilla` and experimental datapack features) enabled on the server. Sent during configuration before `FinishConfiguration`. The client uses them to enable matching content and rendering.

Sent by the server, read by the client. Listen for it with `client.on("UpdateEnabledFeatures", (data) => …)` on the receiving side.

## Fields

| Field | Type | Notes |
|---|---|---|
| `flags` | Array |  |

## Send it

```ts
await client.sendPacket("UpdateEnabledFeatures", {
  flags: ["minecraft:vanilla"],
});
```

Include `minecraft:vanilla` for a normal server and add identifiers for any experimental feature flags enabled by its data packs. Send this before `FinishConfiguration`.

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: [`src/Core/Versions/776/Packets/config/clientbound/UpdateEnabledFeatures.ts`](https://github.com/GDLev/mc-protocol/blob/master/src/Core/Versions/776/Packets/config/clientbound/UpdateEnabledFeatures.ts)