Accessing javascript file from Node JS - Beginner

Question

I have several javascript files in my js directory. How can i add these files in nodeJS.

For example if I am to access a particular javascript file from a HTML document I use the following code :

<script src="js/main.js"></script>

But, how can I access this same file (js/main.js) in nodeJS ?

UPDATE

In NODE JS var express = require('express');

var app = express();
var bodyParser = require('body-parser');
app.use(bodyParser.json());

var urlencodedParser = bodyParser.urlencoded({ extended: false });
var jsonParser = bodyParser.json();
app.use(express.static(__dirname + '/public'));
require('js/main.js');

The error what i get:

Error: Cannot find module '/js/main.js'

use require('/your file path');

Subburaj
– Subburaj

2016-07-05 06:18:01 +00:00
Commented Jul 5, 2016 at 6:18 — Subburaj
– Subburaj, Commented Jul 5, 2016 at 6:18
nodejs.org/api/modules.html

intekhab
– intekhab

2016-07-05 06:20:04 +00:00
Commented Jul 5, 2016 at 6:20 — intekhab
– intekhab, Commented Jul 5, 2016 at 6:20
nodejs.org/api/modules.html#modules_module_require_id

intekhab
– intekhab

2016-07-05 06:21:22 +00:00
Commented Jul 5, 2016 at 6:21 — intekhab
– intekhab, Commented Jul 5, 2016 at 6:21

Nikhil.Patel · Accepted Answer · 2016-07-05 06:25:21Z

4

In your server.js add following lines and check it once.

app.use(express.static(__dirname ));

this set your current directory as your root directory and put your js folder in root level. add comment if you don't find your answer.

answered Jul 5, 2016 at 6:25

Nikhil.Patel

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3 Comments

Illep Over a year ago

The JS files are in the folder PUBLIC/JS. I am still not able to find it

Nikhil.Patel Over a year ago

Then put following lines app.use(express.static(__dirname + '/public'));

Nikhil.Patel Over a year ago

remove require('js/main.js'); it is not required for load javascript in html

Abhishek · Accepted Answer · 2016-07-05 06:31:08Z

1

There should be 2 cases

1 - Include Javascript file in html file.

In this case, you can include your javascript file in your HTML file by writing the following code in your HTML File.

<script src="js/main.js"></script>

2 - Use One Javascript file code in other javascript file of your nodeJS server app code.

NodeJS has the concept of modules to write your code in multiple files.

You can export the code of main.js file as module with module.exports and use this code in any other js file by including following line

var mainModule = require('/path/main.js');

For more details about the modules in nodeJS, you can go through the documentation https://nodejs.org/api/modules.html

answered Jul 5, 2016 at 6:31

Abhishek

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5 Comments

Abhishek Over a year ago

in main.js file. You need to export the module with

Abhishek Over a year ago

module.exports = ExportObject

Abhishek Over a year ago

Where ExportObject is the Object of main.js file what you want to use in other file and export it.

Abhishek Over a year ago

Also, Please take care of the path while importing the module.

Abhishek Over a year ago

If you are still facing the issue, Please post the directory structure and main.js file code. Will help you.

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