Type Alias NotUndefined<T>

NotUndefined: T extends undefined ? never : T

Filters out undefined from a union type.

Essential for type narrowing operations and ensuring required values in contexts where undefined is not acceptable.

Type Parameters

T

Example

function requireValue<T>(value: T | undefined): NotUndefined<T>
type RequiredFields<T> = { [K in keyof T]: NotUndefined<T[K]> }