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2723. Add Two Promises

Easy

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.
+
+ +

 

+

Constraints:

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