1 files changed, 15 insertions, 0 deletions
diff --git a/2621/main.js b/2621/main.js
new file mode 100644
index 0000000..f80b146
--- /dev/null
+++ b/2621/main.js
@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+"use strict";
+
+/**
+ * @param {number} millis
+ * @return {Promise}
+ */
+async function sleep(millis) {
+  await new Promise((resolve) => setTimeout(resolve, millis));
+}
+
+/**
+ * let t = Date.now()
+ * sleep(100).then(() => console.log(Date.now() - t)) // 100
+ */