Sometimes it's useful to detect if you have a value with any type. This is especially helpful while working with third-party Typescript modules, which can export any values in the module API. It's also good to know about any when you're suppressing implicitAny checks.
So, let's write a utility type IsAny<T>, which takes input type T. If T is any, return true, otherwise, return false.
import type { Equal, Expect } from '@type-challenges/utils'
type cases = [
Expect<Equal<IsAny<any>, true>>,
Expect<Equal<IsAny<undefined>, false>>,
Expect<Equal<IsAny<unknown>, false>>,
Expect<Equal<IsAny<never>, false>>,
Expect<Equal<IsAny<string>, false>>,
]