What is JavaScript? · JavaScript

Ch 1 · Introduction to Programming & JavaScript — card 2 of 2.

JavaScript is the programming language that runs inside every web browser. When a button moves, a menu opens, a game responds to your clicks, or a page updates without reloading — that is JavaScript at work. It is one of the most widely used languages in the entire world.

Why JavaScript is a great first language:

• ✅ It runs everywhere — every browser already understands it, no setup needed
• ✅ It powers websites, servers, mobile apps, and even games
• ✅ It reads almost like plain English once you learn the basics
• ✅ Used by Google, Netflix, Facebook, and millions of websites

What makes it special:

• 🌍 The ONLY language web browsers run directly
• 🚀 You see results instantly — change the code, refresh, and it works
• 🧩 The same language works on the front-end (what you see) and the back-end (the server)