1. Node js are providing some of the inbuild module which we help to devlop Node apllication.<br />

2. Http module is one of inbuild module which will help to create web server for web application.<br />

3. It will help to see the output in browser<br /><br />

4. Importing the http module <br />

const http = require('http')

```

5. Now yoou need to create the server, with the input paramter of function of req and res. <br />

// create the server which will take input of req and output as rs

http.createServer(function(req, res){

6. At the end you can mention on which port it will listen.

}).listen(4000, () => console.log("Your application is running on Port 4000"));

7. At the end you can see the full code where we can write it like.

// Importing the http module

const http = require('http')

// create the server which will take input of req and output as rs

http.createServer(function(req, res){

// Adding requst header

res.writeHead(200, {'Content-Type': 'text/html'});

// Pass query string in URL localhost:4000/123

var qs = req.url;

res.write("<h1>hello Satya<h1>" + qs);

// you need to complete the response here.

res.end();

}).listen(4000, () => console.log("Your application is running on Port 4000"));

8. you can stop server using ctrl + c

1. In above code if you are changing anything in code you to stop server and rerun again.

2. To avoid thatyou need to install nodemon.

3 Nodemon is a utility that will monitor for any changes in your source and automatically restart your server

4. Just use nodemon instead of node to run your code, and now your process will automatically restart when your code changes.

5. Installing nodemon

run the node application <br />

<b>***If above will not work follow the below process</b> <br/>

First,Install Nodemon as ``` npm install --save nodemon ``` <br/>

Than in package.json write the followings <br/>

"scripts": {

"server": "nodemon server.js"

},

```

Now in terimnal check for.

npm run server

npm run server HttpNodemon.js