Express installation and setup - Mini Project: Build & Apply

Express Installation and Setup

📖 Scenario: You want to create a simple web server using Express, a popular Node.js framework. This server will respond to requests on your local machine.

🎯 Goal: Set up a basic Express server that listens on port 3000 and responds with 'Hello, Express!' when accessed.

📋 What You'll Learn

Create a new Node.js project with npm init -y

Install Express using npm install express

Create a file named app.js

Write code to import Express, create an app, define a route, and start the server on port 3000

💡 Why This Matters

🌍 Real World

Express is widely used to build web servers and APIs quickly and easily in Node.js projects.

💼 Career

Knowing how to set up Express is essential for backend web development roles using JavaScript and Node.js.

1

Initialize Express app

Create a constant called express that requires the express module.

Express

# Your code here

Need a hint?

Use require('express') to import Express.

2

Create the Express application

Create a constant called app and assign it the result of calling express().

Express

const express = require('express');
# Your code here

Need a hint?

Call express() to create the app.

3

Define a route to respond with text

Use app.get with path '/' and a callback function with parameters req and res. Inside the callback, call res.send('Hello, Express!').

Express

const express = require('express');
const app = express();
# Your code here

Need a hint?

Use app.get to define a GET route for the root path.

4

Start the server on port 3000

Call app.listen with port 3000 and a callback function that logs 'Server is running on port 3000'.

Express

const express = require('express');
const app = express();
app.get('/', (req, res) => {
  res.send('Hello, Express!');
});
# Your code here

Need a hint?

Use app.listen to start the server and log a message.