Create Solution.js

Author: yanglbme

solution/2600-2699/2621.Sleep/Solution.js

@@ -0,0 +1,12 @@
+/**
+ * @param {number} millis
+ * @return {Promise}
+ */
+async function sleep(millis) {
+    return new Promise(r => setTimeout(r, millis));
+}
+
+/**
+ * let t = Date.now()
+ * sleep(100).then(() => console.log(Date.now() - t)) // 100
+ */