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semlinker/pick-by-type.ts

Created October 9, 2022 01:57
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From T, pick a set of properties whose type are assignable to U.
Raw
pick-by-type.ts
type PickByType<T, U> = {
[P in keyof T as T[P] extends U ? P : never]: T[P];
};
type OnlyBoolean = PickByType<
{
name: string;
count: number;
isReadonly: boolean;
isEnable: boolean;
},
boolean
>; // { isReadonly: boolean; isEnable: boolean; }
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