Created
May 27, 2012 16:15
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Socket.io example with jquery and dom manipulation
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| var io = require('socket.io').listen(8000), | |
| nicknames = {}; | |
| io.sockets.on('connection', function (socket) { | |
| socket.on('user message', function (msg) { | |
| socket.broadcast.emit('user message', socket.nickname, msg); | |
| }); | |
| socket.on('nickname', function (nick, fn) { | |
| if (nicknames[nick]) { | |
| fn(true); | |
| } else { | |
| fn(false); | |
| nicknames[nick] = socket.nickname = nick; | |
| socket.broadcast.emit('announcement', nick + ' connected'); | |
| io.sockets.emit('nicknames', nicknames); | |
| } | |
| }); | |
| socket.on('disconnect', function () { | |
| if (!socket.nickname) return; | |
| delete nicknames[socket.nickname]; | |
| socket.broadcast.emit('announcement', socket.nickname + ' disconnected'); | |
| socket.broadcast.emit('nicknames', nicknames); | |
| }); | |
| }); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <link href="style.css" rel="stylesheet"> | |
| <script src="http://code.jquery.com/jquery-1.6.1.min.js"></script> | |
| <script src="/socket.io/socket.io.js"></script> | |
| <script> | |
| // socket.io specific code | |
| var socket = io.connect('http://localhost:8000'); | |
| socket.on('connect', function () { | |
| $('#chat').addClass('connected'); | |
| }); | |
| socket.on('announcement', function (msg) { | |
| $('#lines').append($('<p>').append($('<em>').text(msg))); | |
| }); | |
| socket.on('nicknames', function (nicknames) { | |
| $('#nicknames').empty().append($('<span>Online: </span>')); | |
| for (var i in nicknames) { | |
| $('#nicknames').append($('<b>').text(nicknames[i])); | |
| } | |
| }); | |
| socket.on('user message', message); | |
| socket.on('reconnect', function () { | |
| $('#lines').remove(); | |
| message('System', 'Reconnected to the server'); | |
| }); | |
| socket.on('reconnecting', function () { | |
| message('System', 'Attempting to re-connect to the server'); | |
| }); | |
| socket.on('error', function (e) { | |
| message('System', e ? e : 'A unknown error occurred'); | |
| }); | |
| function message (from, msg) { | |
| $('#lines').append($('<p>').append($('<b>').text(from), msg)); | |
| } | |
| // dom manipulation | |
| $(function () { | |
| $('#set-nickname').submit(function (ev) { | |
| socket.emit('nickname', $('#nick').val(), function (set) { | |
| if (!set) { | |
| clear(); | |
| return $('#chat').addClass('nickname-set'); | |
| } | |
| $('#nickname-err').css('visibility', 'visible'); | |
| }); | |
| return false; | |
| }); | |
| $('#send-message').submit(function () { | |
| message('me', $('#message').val()); | |
| socket.emit('user message', $('#message').val()); | |
| clear(); | |
| $('#lines').get(0).scrollTop = 10000000; | |
| return false; | |
| }); | |
| function clear () { | |
| $('#message').val('').focus(); | |
| }; | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <div id="chat"> | |
| <div id="nickname"> | |
| <form id="set-nickname" class="wrap"> | |
| <p>Please type in your nickname and press enter.</p> | |
| <input id="nick"> | |
| <p id="nickname-err">Nickname already in use</p> | |
| </form> | |
| </div> | |
| <div id="connecting"> | |
| <div class="wrap">Connecting to socket.io server</div> | |
| </div> | |
| <div id="messages"> | |
| <div id="nicknames"></div> | |
| <div id="lines"></div> | |
| </div> | |
| <form id="send-message"> | |
| <input id="message"> | |
| <button>Send</button> | |
| </form> | |
| </div> | |
| </body> | |
| </html> |
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