- Topic: "Getting Started with Node.js and Express"
- Description: Basics of server-side development with Node.js and Express.
Content:
1. Introduction to Node.js
- What is Node.js: Explain that Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine.
- Why use Node.js: Discuss the benefits such as non-blocking, event-driven architecture, and its popularity for backend services.
2. Setting Up Node.js
- Installation: Guide on how to install Node.js and NPM (Node Package Manager).
-
Verify Installation: Show how to verify the installation using
node -v
andnpm -v
commands.
3. Basic Node.js Server
-
Creating a Simple Server:
const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello World\n'); }); server.listen(port, hostname, () => { console.log(`Server running at http://${hostname}:${port}/`); });
-
Explanation:
-
require('http')
: Import the HTTP module. -
http.createServer()
: Create an HTTP server. -
server.listen()
: Bind the server to a port and IP address.
-
4. Introduction to Express.js
- What is Express.js: Explain that Express is a fast, unopinionated, minimalist web framework for Node.js.
-
Installation:
npm install express
-
Basic Express Server:
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}`); });
-
Explanation:
-
require('express')
: Import the Express module. -
app.get()
: Define a route handler for GET requests. -
app.listen()
: Bind the application to a port and start listening for connections.
-
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