방 나갈 때 leaveRoom 전송 추가

 import React, { useCallback, useContext, useEffect, useState } from 'react';
 import React, { useCallback, useContext, useEffect, useState } from 'react';
 import { useLocation, useParams } from 'react-router';
 import { useLocation, useParams } from 'react-router';
 import SocketContext from '../../contexts/SocketContext';
 import SocketContext from '../../contexts/SocketContext';
-import { MessageType } from '../common/types';
+import { MessageResponse, MessageType, RawMessage } from '../common/types';
 import { RoomData, UpdateRoomUser } from './types';
 import { RoomData, UpdateRoomUser } from './types';
 
 
 interface RoomInfoLocation {
 interface RoomInfoLocation {
@@ -47,6 +47,12 @@ export const RoomInfo: React.FC = () => {
 
 
     return () => {
     return () => {
       socket.off(MessageType.ROOM_USER_UPDATE, handleUpdateRoomUser);
       socket.off(MessageType.ROOM_USER_UPDATE, handleUpdateRoomUser);
+      
+      const rawMessage: RawMessage = {
+        type: MessageType.ROOM_LEAVE,
+        message: ''
+      }
+      socket.emit('msg', rawMessage, (response : MessageResponse<undefined>) => {});
     }
     }
   }, []);
   }, []);