//app.jsletroom=['room1','room2','room3'];leta=0;app.io=require('socket.io')();app.io.on('connection',(socket)=>{socket.on('leaveRoom',(num,name)=>{socket.leave(room[num],()=>{console.log(name+' leave a '+room[num]);app.io.to(room[num]).emit('leaveRoom',num,name);});});socket.on('joinRoom',(num,name)=>{socket.join(room[num],()=>{console.log(name+' join a '+room[num]);app.io.to(room[num]).emit('joinRoom',num,name);});});socket.on('disconnect',()=>{console.log('user disconnected');});socket.on('chat-msg',(num,name,msg)=>{a=num;app.io.to(room[a]).emit('chat-msg',name,msg);});});

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//index.ejs$(()=>{constname=prompt('이름을 입력해주세요~');consttarget=prompt('이름을 입력해주세요~');constsocket=io();letroom=['room1','room2','room3'];letnum=0;socket.emit('joinRoom',num,name);$('select').change(()=>{// socket.emit('leaveRoom', num, name);// num++;// num = num % 3;// socket.emit('connect',name,target);// socket.emit('joinRoom', num, name);});$('form').submit(()=>{socket.emit('chat-msg',name,target,$('#m').val());$('#m').val('');returnfalse;});socket.on('chat-msg',(name,msg)=>{$('#messages').append($('<li>').text(name+' : '+msg));});socket.on('leaveRoom',(num,name)=>{$('#messages').append($('<li>').text(name+' leaved '+room[num]+' :('));});socket.on('joinRoom',(num,name)=>{$('#messages').append($('<li>').text(`${name}님이 ${room[num]}에 입장하셨습니다.`));});});