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

# Overview

Sometimes it makes sense to put some restrictions on type arguments. Having these restrictions allows you to make assumptions about the type argument when referring to it inside some function.

You can express the restriction using the `extends` keyword. For example, you might decide to enforce the fact that `FormField` should only contain `string`, `number`, or `boolean` values.

You will notice that after introducing the restriction, the `getFieldValue` function no longer compiles.

This lesson talks about generic type argument constraints.

Strict types

Generics

Composing types

Advanced types

TypeScript in practice

Conclusion

Type Argument Constraints

Overview