From fa29ecf3396868ed23ac8a3ba273f81e5b9ba3a2 Mon Sep 17 00:00:00 2001
From: koronya <koronya@hanmail.net>
Date: Sun, 15 Feb 2026 21:41:27 +0900
Subject: [PATCH] [JS][6kyu] Perfect Square.

---
 codewars/6kyu/perfect-square/koronya.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 codewars/6kyu/perfect-square/koronya.js

diff --git a/codewars/6kyu/perfect-square/koronya.js b/codewars/6kyu/perfect-square/koronya.js
new file mode 100644
index 000000000..76dc11449
--- /dev/null
+++ b/codewars/6kyu/perfect-square/koronya.js
@@ -0,0 +1,16 @@
+// [JS][6kyu] Perfect Square.
+// perfect-square
+// https://www.codewars.com/kata/584e93a70f60247eb8000132/train/javascript
+
+const getDotCount = (string) => string.split('').filter((char) => char === '.').length
+
+const perfectSquare = (string) => {
+  const arr = string.split('\n')
+  let firstLineSquareLength = getDotCount(arr[0])
+  return arr.every((line) => getDotCount(line) === firstLineSquareLength) && arr.length === firstLineSquareLength
+}
+
+perfectSquare('..\n..') === true
+perfectSquare('...\n...\n...') === true
+perfectSquare('...\n,..\n...') === false
+perfectSquare(',,,\n,,,\n,,,') === false