Andrew's Digital Garden

Utility types in Typescript

These utility types are useful to facilitate common type transformations, allowing code to stay a bit more DRY and consistent across a project. Some of the more useful ones are:

Partial<Type> - marks all properties of Type as optional Required<Type> - marks all properties of Type as required

Pick<Type, Keys> - constructs a type by picking properties (Keys) from Type Note that Pick creates a new type, where as Type[key] will create a signular property. Omit<Type, Keys> - constructs a type by removing properties (Keys) from Type

Parameters<Type> - constructs a tuple type from the types used in the parameters of a function type Type ReturnType<Type> - construts a type consisting of the return type of function Type

https://www.typescriptlang.org/docs/handbook/utility-types.html

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Utility types in Typescript