Typescript Utility Types

Utility types are available globally in typescript. They are the basic facility of type-level programming in Typescript.

Work with objects

• Partial and Required make fields optional or required
• Omit and Pick omit or add a field
• Readonly make fields read-only
  • No Mutable but we can make our own

Work with union:

• Exclude
• Extract

Work with functions:

• ReturnType
• Parameters

Other

• NonNullable removes null and undefined
• Awaited unwrap Promise<T> type

See also

• C++ Type Traits

References

• TypeScript’s Utility Types - YouTube