theory.js

JavaScript Basics

What is JavaScript?

JavaScript is a high-level, interpreted programming language used to create interactive web pages and web applications.

  • It runs in the browser, enabling dynamic content updates, animations, and user interactions.
  • JavaScript is part of the web development triad: HTML (structure), CSS (style), and JavaScript (behavior).
  • It can also run outside the browser using environments like Node.js.
// JavaScript changing text dynamically
document.getElementById("demo").textContent = "Hello, JavaScript!";