+++ /dev/null
-import {Except} from './except';
-
-/**
-Create a type that requires at least one of the given keys. The remaining keys are kept as is.
-
-@example
-```
-import {RequireAtLeastOne} from 'type-fest';
-
-type Responder = {
- text?: () => string;
- json?: () => string;
-
- secure?: boolean;
-};
-
-const responder: RequireAtLeastOne<Responder, 'text' | 'json'> = {
- json: () => '{"message": "ok"}',
- secure: true
-};
-```
-*/
-export type RequireAtLeastOne<ObjectType, KeysType extends keyof ObjectType = keyof ObjectType> =
- {
- // For each Key in KeysType make a mapped type
- [Key in KeysType]: (
- // …by picking that Key's type and making it required
- Required<Pick<ObjectType, Key>>
- )
- }[KeysType]
- // …then, make intersection types by adding the remaining keys to each mapped type.
- & Except<ObjectType, KeysType>;