我按照 socket.io ( http://socket.io/get-started/chat/ ) 的聊天教程进行操作,但是一旦我进入该部分,我必须从我卡住的表单中获取信息。
我从index.html
文件中得到的警告是:
io is not defined please fix or add global io
$ is not defined please fix or add global $
我尝试将网站链接添加到,<script src="/socket.io/socket.io.js">
但这没有效果。我使用 c9.io 作为我的开发工具。使用 node.js 和 socket.io。
index.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res) {
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(process.env.PORT, process.env.IP, function() {
console.log("listening on *:" + process.env.PORT);
});
索引.html
<!-- I did not include the html and head tags in this example for readability purposes -->
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
$('form').submit(function(){
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
</script>
</body>