Type Alias EqualsAll<T>

EqualsAll: T extends readonly [infer A, infer B, ...(infer Rest)]
? If<Equals<A, B>, EqualsAll<[B, ...Rest]>, false>
: true

Multiple type equality test.

Type Parameters

T extends readonly any[]
Tuple of types to compare

Remarks

Compares a tuple of types for equality and resolves to true if all types are equal, or false if any type differs.

Example

type A = EqualsAll< [ string, string, string ] >;   // true
type B = EqualsAll< [ boolean, number, number ] >;  // false