Taming TypeScript

The TypeScript Tutorial for The Hater
  1. Welcome, TypeScript Hater
  2. The Myth of Verbosity: Your First 'Free' Types
  3. Finally, Autocomplete You Can Trust: Describing Objects
  4. Taming Arrays of Things
  5. Functions That Don't Lie
  6. Dealing with Reality: Optional Properties
  7. The Billion-Dollar Mistake: Handling `null`
  8. Unions and the Power of Literals
  9. `interface` vs. `type`: A Simple, Pragmatic Guide
  10. The `any` Escape Hatch (and Why It's a Trap)
  11. The Safe Alternative: `unknown`
  12. The `as` Command: A Tool of Last Resort
  13. The `is` Keyword: A Safe Investigation
  14. The Ultimate Test: Typing a Real fetch Request

Welcome, TypeScript Hater

You're a productive JavaScript developer. You get things done.

You know JS like the back of your hand. You can spin up a feature, fix a bug, and ship code with the best of them.

And then, you run into TypeScript.

Suddenly, your smooth workflow hits a wall of red squiggles. Code that you know works fine in JavaScript is now screaming at you about types. Property 'x' does not exist on type 'object'. Argument of type 'string | null' is not assignable to parameter of type 'string'.

It feels like a pointless, pedantic layer of bureaucracy getting in the way of your productivity. You find yourself spending more time fighting the compiler than you do building features.

If this sounds familiar, you're in the right place. This course is for you: the TypeScript Hater.

What if TypeScript could be a partner, not a warden?

Let's be honest: most TypeScript tutorials are not designed for you. They either drown you in complex type theory or they treat you like you've never written a line of code before.

This course is different. Our mission is to focus on the immediate, practical wins. We're going to tackle the most common, frustrating JavaScript bugs and show you how a tiny bit of TypeScript can make them disappear forever.

We will follow one simple rule: No concept before its time. We won't show you complex generic types or weird utility types until you've seen the real-world problems they're designed to solve.

Learn by Doing with the Live Taming Pen

Throughout this course, you'll find interactive code editors—our "Live Taming Pens." You'll be able to write, experiment, and see the results of TypeScript's static analysis in real-time, right in your browser. No setup required.

Interactive Editor
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The Goal: Confidence, Not Comprehensiveness

By the end of this course, you won't be a type-theory academic. You'll be a pragmatic developer who knows how to use TypeScript to ship better, more reliable code, faster.

You'll learn how to:

  • ✅ Get autocomplete you can actually trust.
  • ✅ Eliminate entire classes of runtime errors (goodbye, cannot read property 'undefined').
  • ✅ Make your code easier for you and your team to understand and maintain.
  • ✅ Spend less time debugging and more time building.

Ready to give it a shot? Let's tame this beast.