无法在Express中连接Socket.io

Question

我试着用不同的解决方案连接到socket.io，但我无法连接到它，以下是我的代码片段。

app.js

var express = require('express'); 
var index = require('./routes/index'); 
var users = require('./routes/users'); 
var app = express(); 
// view engine setup 
app.set('views', path.join(__dirname, 'views')); 
app.set('view engine', 'jade'); 
app.use('/', index); 
app.use('/users', users); 
var http = require('http').Server(app); 
var io = require('socket.io')(http); 

io.on('connection', function(socket) { 
    console.log('Client connected.'); 
}); 


http.listen(3000, function(){ 
    console.log('listening on *:3000'); 
}); 

index.jade

extends layout 

    script(src='/socket.io/socket.io.js') 
script. 
    var socket = io(); 

的package.json安装socket.io

"socket.io": "^2.0.3" 

请建议我以后我在哪里做错误

Answer 1

尝试用新的关键字，可能是它的工作

var app = new express();