JavaScript in the Browser
Take the JavaScript language you already know and put it to work in the browser: the DOM, events, asynchronous code, modules, browser APIs, and talking to servers, with three mini projects and a final checkpoint project along the way.
Welcome to JavaScript in the Browser. JavaScript Fundamentals taught you the language itself. This course teaches you what JavaScript is actually for in most jobs: making a web page do something. The DOM, events, fetching data, and the browser features you’ll reach for constantly.
⚠️ Prerequisite: This course assumes you’ve completed JavaScript Fundamentals, or already know core JavaScript: variables, functions, arrays and objects, classes, and error handling. Nothing here re-teaches the language itself.
Why This Course?
Knowing JavaScript syntax and knowing how to build something a user can actually click on are two different skills. This course bridges that gap: every module connects language features you already know to a real, visible effect on a web page.
Learning Format
Each module is a set of short lessons building on one another, ending in a set of exercises. Three modules, Events, Browser APIs, and Web APIs and Backend Communication, close with a mini project once there’s enough of the toolkit in place to build something real. The course finishes with a checkpoint project that combines everything covered into one working web page.
Final Outcome
By the end of this course, you’ll be able to take a plain HTML page and make it fully interactive: responding to clicks, updating itself without a reload, and pulling in real data from a server. From here, a follow-up course picks up JavaScript frameworks, building directly on what you learn here.