Type Alias ArrayElement<S>

ArrayElement: S extends readonly (infer T)[] ? T : never

Extracts the element type from a readonly array or tuple type S. If S is not an array or tuple type, it resolves to never.

Type Parameters

S
The array or tuple type.

Returns

The type of the elements within the array/tuple.

Example

type StrElm = ArrayElement<string[]>; // string
type NumElm = ArrayElement<readonly number[]>; // number
type TupleElm = ArrayElement<[string, boolean]>; // string | boolean
type NotArray = ArrayElement<{ a: number }>; // never