JAVASCRIPT TUTORIAL
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Introduction to JavaScript – Basics Every Beginner Should Know
JavaScript is a lightweight, powerful, and widely-used programming language that allows developers to make websites interactive. Whether it’s validating a form, creating dynamic content, or developing full web apps, JavaScript is the go-to language for front-end developers.
🟢 Why Learn JavaScript?
It’s the language of the web.
All major browsers support it.
JavaScript is essential for front-end development.
It’s also used in back-end (Node.js), mobile apps (React Native), and more.
Easy to learn and has a huge community.
🕰️ A Brief History
Introduced in 1995 by Brendan Eich at Netscape.
Originally called Mocha, then LiveScript, and finally JavaScript.
Today, it follows the ECMAScript standard (ES6 and beyond).
🌟 Key Features
Lightweight and interpreted
Object-Oriented
Functional Programming support
Asynchronous Programming (Promises, async/await)
Event-driven model
Platform-independent (runs in any browser)
📍 Where is JavaScript Used?
Client-side web development
Server-side development with Node.js
Game development
Mobile apps (React Native, Ionic)
Desktop apps (Electron)
APIs and microservices
HTML Code Runner
Click the button to check javascript code:
🔄 JavaScript vs Other Languages
| Feature | JavaScript | Python | Java |
|---|---|---|---|
| Type | Interpreted | Interpreted | Compiled |
| Platform | Browser, Server | Desktop, Server | Mobile, Desktop |
| Syntax | Easy | Easy | Verbose |
| Use-case | Web | AI, Scripting | Enterprise, Android |
✅ Real-life Applications
- Amazon, Facebook, and YouTube use JavaScript extensively.
- All modern websites depend on JavaScript for dynamic behavior.
- Progressive Web Apps (PWAs) are built with JavaScript.