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# updateMemberMeta

> updateMemberMeta method for the RoomSession class.

### updateMemberMeta

* **updateMemberMeta**(`params`): `Promise<void>`

Updates a member's metadata in only the specified fields. This is different from
[setMemberMeta](#setmembermeta), which replaces the whole metadata object.

#### Parameters

**`params`** `object`

Object containing the parameters of the method.

---

**`memberId`** `string`

Id of the member to affect. If omitted, affects the current member.

---

**`meta`** `Record<string, unknown toc={true}>`

The update to the metadata.

---

#### Returns

`Promise<void>`

#### Permissions

* `room.set_meta`

You need to specify the permissions when [creating the Video Room Token](/docs/apis/rest/video/room-tokens/create-room-token) on the server side.

#### Example

```js
roomSession.on("member.updated", (e) => {
  // We can set an event listener to log changes to the metadata.
  console.log(e.member.meta);
});

await roomSession.setMemberMeta({
  memberId: "...",
  meta: { foo: "bar", baz: true },
});
// The logger will now print `{ foo: "bar", baz: true }`

await roomSession.updateMemberMeta({
  memberId: "...",
  meta: { baz: false, t: 10 },
});
// The logger will now print `{ foo: "bar", baz: false, t: 10 }`
```

> updateMemberMeta method for the RoomSession class.