What is the Awaited utility type in TypeScript?

In TypeScript, Awaited is a utility type that allows you to obtain the type of the value that a Promise resolves to.

If you have a type Promise<T>, then Awaited<Promise<T>> will be T. This is useful for extracting the result type of an asynchronous function.

Example:

type ResultType = Awaited<Promise<string>>; // ResultType will be string

async function fetchData(): Promise<number> {
  return 42;
}

type Data = Awaited<ReturnType<typeof fetchData>>; // Data will be number

Awaited also works correctly with nested promises, for example, Promise<Promise<T>> will be unwrapped to T.