Discover advanced TypeScript concepts: Gain insights into compiler flags, generic types, and discriminated unions. Delve into writing error-free code and mastering complex error messages with confidence.

typescript-3.7.5.tar.gz

TypeScript 3.7.5 Strict

TypeScript 3.7.5

Are you using TypeScript, but feel like you’re not making the most out of it? Do you find some advanced TypeScript concepts confusing? Do you get lost looking at complex type errors?

If you answered “yes” to any of these questions, then this course is for you! It introduces you to the world of advanced TypeScript concepts including: compiler flags for catching more errors, generic types, and how to compose types with discriminated unions. 

After finishing this course, you’ll feel more confident in your TypeScript skills. You will be able to write types that detect whole classes of possible runtime errors at compile time. Typing even the most untypeable JavaScript code will be a no brainer for you, and you’ll be fluent in TypeScript error messages.

Advanced TypeScript Masterclass

This chapter walks through several advanced types and concepts in TypeScript.

We'll start with _conditional types_. After a detailed introduction, we'll look at built-in conditional types and their implementations. This will provide us with great learning material to properly understand the concept.

Next, we'll talk about _mapped types_. Again, we'll go through the built-in types and learn some of their useful applications.

Next, we'll cover _type guards_, mechanisms for type-safe type narrowing. We'll learn how to build our own guards.

The chapter ends with a lesson about _nominal types_, a very useful tool that isn't part of TypeScript but can be emulated easily.

Strict types

Generics

Composing types

Advanced types

TypeScript in practice

Conclusion

Introduction