Create server using Node JS Native Javascript

#webdev #beginners #node #javascript

Hello, in this post I want to share with you how to create a simple server on your local host.

Background
In this case, I'm on learning Javascript backend, there are 2 ways to native and use the framework Ekspress JS, I want to give a tutorial for those who all read this article

Task
create a server locally with the Javascript language

Getting Started

the first step is you need to make an index.js file and call a module/library Https, the code is just like this const http = require('http'). this method "require" is calling the HTTP method, the "http is a built-in library in Node JS, so you can only call it on your code.

then to create a server, the code can be like below

const http = require('http')

const listener = http.createServer((req, res) => {
    console.log('req.headers.autorization', req.headers.authorization)
    if (req.url === '/user'){
        res.writeHead(200, {'Content-Type': 'application/json'})
        res.end(JSON.stringify({ name : 'John Doe'}))
    }   else {
        res.writeHead(200)
        res.end('Hello World')
    }

})

listener.listen(8000, 'localhost', () => {
    console.log('Server is listening on port 8000')
})

the method http.createServer have the callback parameter req and res, as we know req for a request and res for a response. if we want to make a routing in native node JS we can use if (req.url === '/user'). it is just an example for /user. if we run it will show name: 'John Doe' and for "else" or other it will show 'Hello World'

And we can run in terminal command bash with node index.js. And then notice will prompt on the terminal "Server is listening on port 8000". We can see on our browser on locallost:8000. We have already succeeded to build a server with native node JS, the preview is below.