Modern JavaScript: The Fundamentals

You can build a page with HTML and CSS, but JavaScript is the part that still feels like magic. Maybe you've copied a snippet that worked and couldn't explain why, or you've never really written any at all. Every tutorial seems to assume you already know how arrays, objects, and functions fit together. The moment you step off the happy path, you're stuck.

This course teaches the language itself, slowly and practically. Across twelve sections you'll work through how JavaScript runs, values and types, control flow, functions, scope, arrays, objects, JSON, errors, and the modern syntax you'll use constantly. You'll also touch classes, prototypes, collections, and regular expressions where they help the bigger picture, without turning the course into a language reference.

Along the way, you'll build a small movie data library: reusable functions that model films, clean data, search, filter, sort, and summarise a collection. No DOM, no API, no tooling yet. The point of this part is the language, on its own, until you can reason about the code you write.

The whole course is text, and that's deliberate. You can copy code without scrubbing through a video, search a lesson for the method you half-remember, and come back to the section on closures six months from now when it finally clicks. It's the format you already reach for when you're stuck, turned into a course.

This is Part 1 of two. Here you learn the language. In Part 2, Modern JavaScript in the Browser, you take it to the DOM, real APIs, and a deployed app. You finish this part able to read and write JavaScript with intent instead of guessing.

You'll build a small movie data library in plain JavaScript: reusable functions for modelling films, cleaning data, searching, filtering, sorting, and summarising a collection.

It runs in the browser console because Part 1 is about the logic layer. In Part 2, you'll give that same kind of logic a browser UI, connect it to a real API, and deploy it.