🔧Result

type Result<T, E = unknown> = Ok<T> | Err<E, T>

Result accepts 2 type parameters, T is the ok value type, E is the error value type.

Ok and Err are 2 internal types, you shouldn't use them directly.

Example

You can create a Result type by calling 2 functions ok and err.

const r1 = ok(1)
//    ^? const r1: Result<number, never>

const r2 = err(1)
//    ^? const r2: Result<unknown, number>