Day 10 of 14 30 minPartial & RequiredPick & OmitRecord
Build new types from existing ones instead of repeating yourself. Use Partial, Required, Readonly, Pick, Omit, Record, Exclude, Extract, NonNullable, ReturnType, Parameters and Awaited, and combine them for real tasks like update payloads.
By the end of today you can
- Make properties optional, required or readonly with Partial, Required and Readonly
- Select or remove properties with Pick and Omit
- Filter unions with Exclude, Extract and NonNullable
- Get types from functions with ReturnType, Parameters and Awaited
- Combine utility types to keep one source of truth
What's inside
- 5 sections
- 2 diagrams and mind maps
- 5 code examples you can run
- 5-question quiz
- 1One source of truth
- 2Changing properties: Partial, Required, Readonly
- 3Selecting properties: Pick, Omit and Record
- 4Filtering unions: Exclude, Extract and NonNullable
- 5Types from functions: ReturnType, Parameters and Awaited
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