Getting Started with JavaScript: A Quick Guide

What Is JavaScript?

JavaScript is the only language that runs natively in every web browser, with no compilation or plugin required. The event loop is what lets single-threaded JavaScript handle asynchronous operations without blocking.

Why It's Worth Knowing

Promises, and later async/await, turned deeply nested asynchronous callbacks into flat, readable code. If you're just getting started with JavaScript, these few points already give you a clear picture of how it's used in real projects.