Promise.all

Type the function PromiseAll that accepts an array of PromiseLike objects, the returning value should be Promise<T> where T is the resolved result array. ⏳

In this medium-level challenge, you'll type the function promiseall that accepts an array of promiselike objects, the returning value should be promise<t> where t is the resolved result array.. Learn array type operations, Promise type handling in this medium-level challenge on TypeScriptPro.

You'll learn about array type operations, Promise type handling, essential skills for advanced TypeScript development and type-level programming.

For this challenge, you will need to change the following code to make the tests pass (no type check errors).

const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise<string>((resolve, reject) => {
setTimeout(resolve, 100, 'foo');
});
 
// expected to be `Promise<[number, 42, string]>`
const p = PromiseAll([promise1, promise2, promise3] as const)

Detailed Explanation

This challenge requires understanding of array type operations and Promise type handling.

The solution involves carefully constructing types that satisfy all test cases while handling edge cases properly.

This challenge helps you understand array type operations and how to apply these concepts in real-world scenarios.