Prerequisites

Before starting, We need to have a local development environment for Node.js. If haven’t installed Node.js yet, first Install Nodejs in website Instal Nodejs .

Step 1: Create a New Project Folder

First, create a new folder for the project by running the following command in your terminal:

mkdir myapp && cd myapp

Step 2: Initialize a New Node.js Project

Next, initialize a new Node.js project by running the following command:

npm init -y

Step 3: Install Express.js

Now, install Express.js by running the following command:

npm install express

Step 4: Create an Express.js Application

Create a new file named app.js in our project folder and open it in your text editor. In this file, write the following code:

const express = require('express');
const app = express();
const port = 3000;

app.get('/', (req, res) => {
 res.send('Hello World!');
});

app.listen(port, () => {
 console.log(`Example app listening at http://localhost:${port}`);
});

Step 5: Run the Express.js Application

Finally, run Express.js application by running the following command:

node app.js

 We can now open Our web browser and navigate to http://localhost:3000 to see “Hello World!” 

Create Project with Express application generator

Install Generator Global

sudo npm install -g express-generator@latest

Display the command options with the -h option:

express -h

 Options:

    -h, --help          output usage information
        --version       output the version number
    -e, --ejs           add ejs engine support
        --hbs           add handlebars engine support
        --pug           add pug engine support
    -H, --hogan         add hogan.js engine support
        --no-view       generate without view engine
    -v, --view <engine> add view <engine> support (ejs|hbs|hjs|jade|pug|twig|vash) (defaults to jade)
    -c, --css <engine>  add stylesheet <engine> support (less|stylus|compass|sass) (defaults to plain css)
        --git           add .gitignore
    -f, --force         force on non-empty directory

Then Create Project, Fro example use ejs as a template engine:

express --view=ejs myapp

Go to project directory and install depedencies:

cd myapp

Install Depedencies:

npm install

Run Project

DEBUG=myapp:* npm start

Now we can open browser and access routes like : http://localhost:3000 OR http://localhost:3000/users

The generate structure with see like this:

.
├── app.js
├── bin
│   └── www
├── package.json
├── public
│   ├── images
│   ├── javascripts
│   └── stylesheets
│       └── style.css
├── routes
│   ├── index.js
│   └── users.js
└── views
    ├── error.ejs
    ├── index.ejs

Happy Coding!