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typelab / assertions / IsExtendsEitherWay

type IsExtendsEitherWay<T1, T2> = _IsTrue<IfExtendsEitherWay<T1, T2, true, false>>;

Type that checks if type T1 extends type T2 or type T2 extends type T1.

Type Parameters

Type Parameter Description

T1

The first type to compare.

T2

The second type to compare.

Returns

true if either conditions are true, false otherwise.

Example

type Relate = IsExtendsEitherWay<string, ''>; // true
type NotRelate = IsExtendsEitherWay<string, number>; // false