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I have a basic script source link:

// index.html
<script src="/js/jquery.js"></script>

Which doesn't work, despite the file existing. I tried to link to it in the Node.js server but it threw an error that express wasn't defined, yet it is.

//server.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var clientlist = [];

app.get('/', function(req, res) {
    res.sendfile('index.html');
    app.use(express().static('/js/jquery.js'));
});

I have a basic script source link:

// index.html
<script src="/js/jquery.js"></script>

Which doesn't work, despite the file existing. I tried to link to it in the Node.js server but it threw an error that express wasn't defined, yet it is.

//server.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var clientlist = [];

app.get('/', function(req, res) {
    res.sendfile('index.html');
    app.use(express().static('/js/jquery.js'));
});

• javascript
• node.js

Share Improve this question Follow asked May 3, 2016 at 19:47 Terry AndersonTerry Anderson 10911 gold badge22 silver badges1010 bronze badges 5

• have you set your public folder and added js there? e.g. app.use(express.static(__dirname + '/public')); and make a folder js with jquery.js in it – Jakob Commented May 3, 2016 at 20:00
• Same thing, says express is not defined. – Terry Anderson Commented May 3, 2016 at 20:09
• 1 you are not defining express anywhere – Soren Commented May 3, 2016 at 20:21
• I require it, and then use what the value of the definition would be, as you said I need to do: var express = express(); – Terry Anderson Commented May 3, 2016 at 20:29
• @TerryAnderson -- no var express = express(); is wrong, and not what I said in my answer. – Soren Commented May 4, 2016 at 1:44

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3 Answers 3

Sorted by: Reset to default 2

Your requires are wrong, and hence express is not defined

Chamnge your first line var app = require('express');

var express = require('express');
var app = express();

Here is my solution.

Note:

You may want to replace '/var/www/nodeserver', with the directory, you are working in!

First of all, don't use res.sendfile(), it is deprecated, use res.sendFile() instead.
Or just serve a plete directory:

Setting all up

index.js

This could be your 'index.js' in '/var/www/nodeserver':

// Setup basic express server
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io')(server);

// Change 3000 to whatever port, you want to access the site with"http://127.0.0.1:3000"
var port = process.env.PORT || 3000;

server.listen(port, function() {
    console.log("Server listening at port "+port);
});

// Routing
var dir = __dirname+'/public'; // Path of the index.js but one dir further (public)
app.use(express.static(dir)); // serve all files in '/var/www/nodeserver/public/'

package.json

And you would need to have a 'package.json', containing this:

{
    "name": "nameofyourapplication",
    "version": "versionofyourapplication",
    "dependencies": {
        "express": "^4.10.2",
        "socket.io": "^1.3.7"
    }
}

Installation

Then install the dependencies defined in the 'package.json', with this mand: npm install, while in the directory '/var/www/nodeserver/'.
This will install all the dependencies, locally, so it will create a folder named 'node_modules', in '/var/www/nodeserver'.

Using it

Next you just need to put all the files you want to serve, into the 'public' folder in '/var/www/nodeserver' and run the 'index.js' with node index.js.

The Filetree

Your filetree should then look something like this:

• nodeserver
  • node_modules
    • express
    • socket.io
  • public
    • js
      • jquery.js
  • index.js
  • package.json

That should do it!

Before your file name put __dirname,'index.html'. New code will be res.sendfile(__dirname + 'index.html');

And also your first line is wrong it should be var express = require('express');

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