diff --git a/dom-api-question.js b/dom-api-question.js
index 7595cbb..e246db6 100644
--- a/dom-api-question.js
+++ b/dom-api-question.js
@@ -38,7 +38,7 @@
 // Solution
 const INDENT_SIZE = 4;
 const getSpaces = (length) => {
-    return new Array(length).fill(" ").join("");
+    return " ".repeat(length);
 };
 
 class Node {