Given a positive integer millis, write an asynchronous function that sleeps for millis milliseconds. It can resolve any value.
+
Example 1:
+ +
+Input: millis = 100
+Output: 100
+Explanation: It should return a promise that resolves after 100ms.
+let t = Date.now();
+sleep(100).then(() => {
+ console.log(Date.now() - t); // 100
+});
+
+
+Example 2:
+ ++Input: millis = 200 +Output: 200 +Explanation: It should return a promise that resolves after 200ms. ++ +
+
Constraints:
+ +1 <= millis <= 1000