Method to

packages/socket.io/lib/index.ts:890–892

* Targets a room when emitting. * * @example * // the “foo” event will be broadcast to all connected clients in the “room-101” room * io.to("room-101").emit("foo", "bar"); * * // with an array of rooms (a client will be notified at most once) * io.to(["room-101", "room-102"]).em

(room: Room | Room[])

   * @return a new {@link BroadcastOperator} instance for chaining
   */
  public to(room: Room | Room[]) {
    return this.sockets.to(room);
  }

  /**
   * Targets a room when emitting. Similar to `to()`, but might feel clearer in some cases: