JS Intro

Relax. We'll talk through this in plain words — no textbook voice.

JavaScript (JS) is a programming language used to make web pages interactive and dynamic. It can add lively features to static pages built with HTML and CSS.

🌟 The main roles of JavaScript:

• Interactive Frontend: Responding to user actions (clicks, forms)

• DOM Manipulation: Dynamically changing HTML content and CSS styles

• Asynchronous Communication: Exchanging data with a server behind the scenes (AJAX)

• Backend Development: Building server-side applications with Node.js

javascript

// JavaScript can change HTML content.
// This is often placed in a <script> tag.
function sayHello() {
  document.getElementById("demo").innerHTML = "Hello, JavaScript!";
}

// You would call sayHello() from an HTML button click, for example.
// For console output:
console.log("JavaScript is running!");

You should see

(Browser console) JavaScript is running!