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typelab / assertions / IsExtendsMutually

type IsExtendsMutually<T1, T2> = _IsTrue<IfExtendsMutually<T1, T2, true, false>>;

Type that checks if type T1 extends type T2 and 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 both conditions are true, false otherwise.

Example

type Mutual = IsExtendsMutually<string, any>; // true
type NotMutual = IsExtendsMutually<string, ''>; // false