BeginnerLesson 15 of 1830 min 路 hands-on
Utility Types
Part of the TypeScript course
TypeScript ships with a small library of generic types that take a type as input and return a transformed type as output. They have unassuming names (Partial, Pick, Omit, Record, ...) and they show up everywhere in real code. This lesson teaches the eight you will use most.
Given a type, Partial<T> makes every property optional ...
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Start this lessonUtility TypesWhat you'll learn
- Partial<T>
- Required<T>
- Readonly<T>
- Pick<T, K>
- Omit<T, K>
- Record<K, V>
- ReturnType<T>
- Parameters<T>
Read this lesson in your language
All lessons in this course
18 lessons- 1Hello, TypeScript20 min
- 2Type Basics25 min
- 3Arrays and Tuples25 min
- 4Object Types and Interfaces25 min
- 5Functions25 min
- 6Union and Literal Types25 min
- 7Type Narrowing30 min
- 8Type Aliases vs Interfaces20 min
- 9Optional, Readonly, and Nullable25 min
- 10Enums20 min
- 11Generics30 min
- 12Classes25 min
- 13Inheritance and Abstract Classes25 min
- 14Modules25 min
- 15Utility Types30 min
- 16Mapped and Conditional Types30 min
- 17Declaration Files and Libraries25 min
- 18tsconfig and the Compiler30 min
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