Free TypeScript Courses online

Adding types to JavaScript sounds like a chore until the first time a refactor tells you exactly what you broke. TypeScript is now the default for most serious JavaScript projects, and the good news for beginners is that it's a smaller subject than it looks — annotations, interfaces, unions, generics, and then a long tail you can learn when you meet it.

Three entries here, and they're three doors into the same room rather than a sequence.

Pick your door

The TypeScript Handbook from Microsoft is the reference: basics, narrowing, generics, conditional and mapped types. It says outright that it isn't a tooling guide or a JavaScript tutorial, which is useful honesty — turn up with JavaScript already in hand. Beginner's TypeScript by Matt Pocock is eighteen free exercises that hand you broken code and a pointer to the relevant docs before showing the fix, so what you actually practise is reading documentation. Learn TypeScript — Full Course for Beginners is Bob Ziroll's two hours for freeCodeCamp, framing types as a layer sitting on top of the JavaScript you already write.

The prerequisite nobody states

All three assume comfortable JavaScript. Not passing familiarity — comfortable. If you're still unsure how a callback works or what this points at, types feel like an obstacle rather than a tool, and you end up fighting two languages at once. Spend another month on JavaScript first; TypeScript will take a fraction of the time afterwards.

What three courses can't cover

This is our thinnest language category, and it stops early. Between them the three entries cover the language basics well and then hand you back to the docs. Nothing here on TypeScript with React, which is how most people actually encounter it. Nothing on configuring a project or build tooling, nothing on type-level programming, nothing on typing third-party libraries or migrating an existing JavaScript codebase. Pocock's exercises are free, but they're the entry tier of a much larger paid catalogue we don't list.

Our take

Do Pocock's eighteen exercises in an evening, keep the Handbook open, and learn the rest inside a real project. TypeScript is one of the few subjects where reading ahead genuinely doesn't help.