***

id: eb40ce98-24b9-4cd8-8b37-92bda0e1689e
title: lock
slug: /js/reference/video/room-session/lock
description: lock method for the RoomSession class.
max-toc-depth: 3
----------------

### lock

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

Locks the room. This prevents new participants from joining the room.

#### Returns

`Promise<void>`

#### Example

```js
await roomSession.lock();
```