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I've followed the exact same steps which have always previously worked for me, create application through express, place the module dependencies in the node_modules folder. It appears that the socket.io client-side javascript file isn't being found.
(I've looked at other peoples fixes, which is to include the JavaScript file in a script tab. I have not had to do this for my previous node + socket.io projects).
JavaScript on client:
var socket = io.connect('http://localhost');
JavaScript on server:
var io = require('socket.io').listen(app);
node_modules folder:
socket.io, which has an internal node_modules folder containing socket.io-client
Error Message:
Uncaught ReferenceError: io is not defined
(anonymous function)
When I include the socket.io client manually: http://cdn.socket.io/stable/socket.io.js
I get a different error which is:
Uncaught TypeError: Object #<Object> has no method 'connect'
(anonymous function)
549
On the client, did you do:
<script src="/socket.io/socket.io.js"></script>
before you set the socket variable?
102
Node.js newbie here!
I am pretty sure this has been answered. Yet I kept finding problems with the src for the socket. Apparently this : <script src="/socket.io/socket.io.js"> was not working for me on the client side.
I've replaced the above line with this and it seems to work fine.
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
(Edit: although this is obvious, this link may not work depending on when you are reading this answer. Please pick the latest link from: https://cdnjs.com/libraries/socket.io)
Here is a working client side code:
<body>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="https://code.jquery.com/jquery-1.11.1.js"></script>
<script>
$(function(){
var socket = io('http://localhost:8080');
console.log("Socket connected"+socket.connected);
socket.on('notification', function(value){
//insert your code here
});
});
</script>
On the server side (handles only 1 socket)
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var port = process.env.PORT || 8080;
app.get('/', function(req, res){
console.log("app works");
});
io.on('connection', function(socket){
socket.emit('notification', {message:"hi"});
});
http.listen(port, function(){
console.log('listening on :' + port);
});
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