diff --git a/2724-sort-by/2724-sort-by.js b/2724-sort-by/2724-sort-by.js
new file mode 100644
index 0000000..9215ab9
--- /dev/null
+++ b/2724-sort-by/2724-sort-by.js
@@ -0,0 +1,8 @@
+/**
+ * @param {Array} arr
+ * @param {Function} fn
+ * @return {Array}
+ */
+var sortBy = function(arr, fn) {
+    return arr.sort((a, b) => fn(a) - fn(b))
+};
\ No newline at end of file