Skip to content
Onsite
12 / 28

MyOmit<T, K>

MediumP1Coding

Implement the built-in Omit<T, K> generic without using it.

MyOmit<T, K> builds a type from T with the keys in K removed. K must be limited to keys of T.

Tests your type must pass

interface Todo {
  title: string
  description: string
  completed: boolean
}

interface Expected1 {
  title: string
  completed: boolean
}

interface Expected2 {
  title: string
}

type cases = [
  Expect<Equal<Expected1, MyOmit<Todo, 'description'>>>,
  Expect<Equal<Expected2, MyOmit<Todo, 'description' | 'completed'>>>,
  Expect<Equal<Todo, MyOmit<Todo, never>>>,
  // @ts-expect-error 'invalid' is not a key of Todo
  MyOmit<Todo, 'description' | 'invalid'>,
]

Hints

TypeScript
Run and Submit type-check your solution against the tests.