01
Introduction to JavaScript
Chapter 1 • Beginner
15 min
Welcome to JavaScript Programming! JavaScript is the language of the web and one of the most popular programming languages in the world.
What is JavaScript?
JavaScript is a programming language that adds interactivity to your website. It's one of the three core technologies of web development, alongside HTML and CSS.
- HTML provides the structure of your webpage
- CSS provides the styling and layout
- JavaScript provides the behavior and interactivity
Why Learn JavaScript?
JavaScript is essential for modern web development because:
- It runs in every web browser
- It's used for both frontend and backend development
- It has a huge ecosystem of libraries and frameworks
- It's beginner-friendly with a gentle learning curve
- It's in high demand in the job market
Where JavaScript is Used
- Web Development: Frontend frameworks like React, Vue, Angular
- Backend Development: Node.js for server-side programming
- Mobile Apps: React Native, Ionic
- Desktop Applications: Electron
- Game Development: Phaser, Three.js
- Data Visualization: D3.js, Chart.js
Getting Started
To start programming in JavaScript, you need:
- Web Browser - Any modern browser (Chrome, Firefox, Safari, Edge)
- Code Editor - Where you write your code (VS Code, Sublime Text, etc.)
- Browser Developer Tools - Built-in tools for testing and debugging
Don't worry about the technical details now - we'll cover everything step by step!
Hands-on Examples
Hello World in JavaScript
console.log('Hello, World!');This simple program uses console.log() to display text in the browser console.