@cuppachino/type-space/dist/require-some.d.ts

A collection of type utilities for TypeScript.

import type { Combine } from './combine';
/**
 * Returns a new type where some properties `K` of `T` are required.
 * The rest are left as-is.
 *
 * @example
 * ```
 * type Data = {
 * a?: string;
 * b?: string;
 * };
 * type Ex = RequireSome<Test, "a">;
 * ```
 */
export type RequireSome<T, K extends keyof T> = Combine<{
    [P in keyof T as Extract<P, K>]-?: T[P];
} & {
    [P in keyof T as Exclude<P, K>]: T[P];
}>;