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KeysOfUnion<ObjectType>

KeysOfUnion<ObjectType> = keyof UnionToIntersection<ObjectType extends unknown ? Record<keyof ObjectType, never> : never>

Defined in: packages/react-querybuilder/src/types/type-fest/keys-of-union.ts:40

Create a union of all keys from a given type, even those exclusive to specific union members.

Unlike the native keyof keyword, which returns keys present in all union members, this type returns keys from any member.

Type Parameters​

Type Parameter
ObjectType

https://stackoverflow.com/a/49402091

Example​

import type {KeysOfUnion} from 'type-fest';

type A = {
	common: string;
	a: number;
};

type B = {
	common: string;
	b: string;
};

type C = {
	common: string;
	c: boolean;
};

type Union = A | B | C;

type CommonKeys = keyof Union;
//=> 'common'

type AllKeys = KeysOfUnion<Union>;
//=> 'common' | 'a' | 'b' | 'c'
caution

API documentation is generated from the latest commit on the main branch. It may be somewhat inconsistent with official releases of React Query Builder.