Your First Steps with JavaScript

Think about a website where you clicked a button and something immediately changed — a menu appeared, a score went up, or an image swapped. That instant reaction did not happen by accident. Someone wrote instructions to make the page respond to you. Those instructions are called JavaScript. Before you read on, try to answer this: what do you think is the difference between a web page that just displays information and one that reacts when you interact with it? Hold that thought — you are about to find out.