JavaScript Introduction

🧠 What is JavaScript?

JavaScript (JS) is a scripting language used to make web pages interactive, dynamic, and functional.

It runs directly in the browser and works with HTML & CSS to create modern websites.

🧩 How JavaScript Works with Web Technologies

Example:
HTML creates a button → CSS styles it → JavaScript makes it clickable.

✨ What Can JavaScript Do?

✔ Change HTML content
✔ Change CSS styles
✔ Respond to user actions (click, input, scroll)
✔ Validate forms
✔ Create animations, popups, sliders
✔ Communicate with servers (APIs)
✔ Build full applications (like Facebook, Gmail)

🏷 JavaScript Syntax Example

Inline JavaScript:

Internal JavaScript:

External JavaScript (recommended):

📌 Simple Example Showing Output

🚀 Why Learn JavaScript?

Because with JavaScript you can build:

• Websites

• Mobile apps

• Games

• Server applications (Node.js)

• Desktop apps (Electron.js)

📍 Fun Fact

➡️ JavaScript was created in just 10 days in 1995.
➡️ Today, it’s one of the most popular programming languages in the world.