Method join

packages/socket.io/lib/socket.ts:461–468

* Joins a room. * * @example * io.on("connection", (socket) => { * // join a single room * socket.join("room1"); * * // join multiple rooms * socket.join(["room1", "room2"]); * }); * * @param {String|Array} rooms - room or array of rooms * @return a Promis

(rooms: Room | Array<Room>)

   * @return a Promise or nothing, depending on the adapter
   */
  public join(rooms: Room | Array<Room>): Promise<void> | void {
    debug(class="st">"join room %s", rooms);

    return this.adapter.addAll(
      this.id,
      new Set(Array.isArray(rooms) ? rooms : [rooms]),
    );
  }

  /**
   * Leaves a room.