What is JavaScript?

Discover the programming language that brings the web to life

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Welcome to JavaScript!

What is JavaScript?

JavaScript is a programming language that allows you to implement complex features on web pages. Every time a web page does more than just sit there and display static information — displaying timely content updates, interactive maps, animated graphics, scrolling video jukeboxes — you can bet that JavaScript is probably involved!

Learning Objectives

  • Understand what JavaScript is and how it fits into a website
  • Learn what you can do with JavaScript
  • See how to add JavaScript to a web page
  • Experience interactive web development
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Code Layers

HTML Structure

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🧠 Key Concepts
H
HTML

Defines the structure and content of web pages

C
CSS

Controls the visual appearance and layout

J
JavaScript

Adds interactivity, behavior, and dynamic functionality