Add Two Promises.js

// Given two promises promise1 and promise2, return a new promise. promise1 and promise2 will both resolve with a number. The returned promise should resolve with the sum of the two numbers.
 

// Example 1:

// Input: 
// promise1 = new Promise(resolve => setTimeout(() => resolve(2), 20)), 
// promise2 = new Promise(resolve => setTimeout(() => resolve(5), 60))
// Output: 7
// Explanation: The two input promises resolve with the values of 2 and 5 respectively. The returned promise should resolve with a value of 2 + 5 = 7. The time the returned promise resolves is not judged for this problem.
// Example 2:

// Input: 
// promise1 = new Promise(resolve => setTimeout(() => resolve(10), 50)), 
// promise2 = new Promise(resolve => setTimeout(() => resolve(-12), 30))
// Output: -2
// Explanation: The two input promises resolve with the values of 10 and -12 respectively. The returned promise should resolve with a value of 10 + -12 = -2.

// CODE

/**
 * @param {Promise} promise1
 * @param {Promise} promise2
 * @return {Promise}
 */
var addTwoPromises = async function(promise1, promise2) {
    const [add1, add2] = await Promise.all ([promise1, promise2]);
    return add1 + add2
};

/**
 * addTwoPromises(Promise.resolve(2), Promise.resolve(2))
 *   .then(console.log); // 4
 */