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ali-master/partial-require-only-one.ts

Created November 6, 2021 07:44
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RequireOnlyOne & PartialOnlyOne in typescript
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partial-require-only-one.ts
type RequireOnlyOne<T, Keys extends keyof T = keyof T> = Pick<T, Exclude<keyof T, Keys>> & {
[K in Keys]-?: Required<Pick<T, K>>;
}[Keys];
type PartialOnlyOne<T, Keys extends keyof T = keyof T> = Pick<T, Exclude<keyof T, Keys>> & {
[K in Keys]?: Partial<Pick<T, K>>;
}[Keys];
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