Create Express.JS from Scratch

Create Express.JS from Scratch

Photo by Luca Bravo on Unsplash

In this article we are going to create simple express application so follow along with me

Step 1: Install nodejs from Node.JS on your system.
Step 2: After installation check the version of NodeJS to ensure that NodeJS is    installed or not.

node --v

Step 3: Create a folder for your app with the following command Go to that directory

mkdir my_app
cd my_app

Step 4: initialize NPM for your project by using npm init -y

Step 5: Install the express package from NPM.

npm i express

Step 5: create the index.js in your my_app directory

Step 6 Write the following code to create your backend application

const express = require('express');
const PORT = 3001 || process.env.PORT
const app = express()

app.get('/', (req, res) => {
    res.send("<h1>This is my first app</h1>")

app.listen(PORT, () => {
    console.log(`App is up and running on ${PORT}`);

Step 7: Search http://localhost:3001 on your tab bar of the browser.

Yey, First application has been created successfully and you will get an output like mentioned below