Warm-up1 / 1
Can you write this from memory?
Create type Scores for an object with string keys and number values
TypeScript ships with utility types that transform existing types -- making properties optional, picking subsets, creating index signatures. They save you from writing repetitive type definitions.
This page gives you a quick overview. For the full reference with every utility type and practical examples, see the utility types cheat sheet.
What You'll Practice: TypeScript Utility Types: Partial, Pick, Omit & More
Use Partial, Required, and Readonly to modify property modifiersExtract and exclude type members with Pick, Omit, Extract, and ExcludeCreate typed lookup objects with RecordInfer function signatures with ReturnType and ParametersCompose multiple utility types for complex transformations
TypeScript Utility Types: Partial, Pick, Omit & More Sample Exercises
Example 1Difficulty: 1/5
Make all User properties optional for an update payload
Partial<User>Example 2Difficulty: 1/5
Make all Config properties required
Required<Config>Example 3Difficulty: 2/5
Create type with only name and email from User
Pick<User, 'name' | 'email'>+ 2 more exercises
Quick Reference
TypeScript Utility Types: Partial, Pick, Omit & More Cheat Sheet →Copy-ready syntax examples for quick lookup