Node JS Full Course - Learn Node.js in 7 Hours | Node.js Tutorial for Beginners | Edureka
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Published on Oct 14, 2024
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Table of Contents
Introduction
This tutorial is designed to help you learn Node.js, a popular JavaScript runtime used for building scalable network applications. Whether you're a beginner or a professional looking to enhance your skills, this guide provides a comprehensive overview of Node.js, its features, and practical applications.
Step 1: Understand Node.js and Its Architecture
- What is Node.js?
- Node.js is an open-source, cross-platform JavaScript runtime environment that executes JavaScript code outside a web browser.
- Client-Server Architecture
- Understand the basics of client-server architecture, where the client sends requests to the server, which processes them and sends back responses.
- Multi-Threaded vs Single-Threaded Models
- Node.js operates on a single-threaded model which uses non-blocking I/O calls to handle multiple connections concurrently.
- Compare this with multi-threaded models that can be more resource-intensive.
Step 2: Install Node.js
- Download and install Node.js from the official website.
- Verify the installation by running the following commands in your terminal:
node -v npm -v
Step 3: Create Your First Node.js Application
- Create a new directory for your project:
mkdir my-node-app cd my-node-app
- Create a file named
app.js
and add the following code to create a simple HTTP 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}/`); });
- Run your application:
node app.js
- Open your browser and navigate to
http://127.0.0.1:3000
to see your app in action.
Step 4: Explore Node.js Modules
- Core Modules
- Learn about built-in modules like
fs
(file system),http
, andpath
. These modules streamline development by providing essential functionalities.
- Learn about built-in modules like
- Local and Third-Party Modules
- Create a local module by defining a function in a separate file and exporting it. For example:
// myModule.js module.exports = function() { console.log("Hello from my module!"); };
- Install third-party modules using npm (Node Package Manager):
npm install express
- Create a local module by defining a function in a separate file and exporting it. For example:
Step 5: Work with NPM
- Understanding NPM
- NPM is the package manager for Node.js, allowing you to install libraries and manage dependencies.
- NPM Commands
- Initialize a new npm project:
npm init
- Install a package:
npm install <package-name>
- Initialize a new npm project:
Step 6: Build a RESTful API with Node.js
- What is REST API?
- REST (Representational State Transfer) is an architectural style for designing networked applications.
- Creating an API
- Use Express.js to set up a basic RESTful API:
const express = require('express'); const app = express(); const port = 3000; app.get('/api', (req, res) => { res.send('Hello API!'); }); app.listen(port, () => { console.log(`API running at http://localhost:${port}/api`); });
- Use Express.js to set up a basic RESTful API:
Step 7: Database Integration
- Using MySQL with Node.js
- Install MySQL and use a library like
mysql
to connect your Node.js application to a MySQL database.
- Install MySQL and use a library like
- Using MongoDB
- Install MongoDB and use Mongoose for object modeling in your Node.js applications.
Step 8: Containerization with Docker
- What is Docker?
- Docker is a platform that enables developers to automate the deployment of applications within lightweight containers.
- Using Docker with Node.js
- Create a Dockerfile to define your application's environment and dependencies. Example Dockerfile:
FROM node:14 WORKDIR /usr/src/app COPY package*.json ./ RUN npm install COPY . . CMD ["node", "app.js"]
- Create a Dockerfile to define your application's environment and dependencies. Example Dockerfile:
Conclusion
In this tutorial, you've learned the foundational concepts of Node.js, how to set up your environment, create a simple application, and expand into more advanced topics like building RESTful APIs and using Docker. As a next step, consider exploring more complex applications and deepen your understanding of database integration and deployment strategies. Happy coding!