From 35861120e12c8a3f9fb1b861e5e5ff1a99c7a548 Mon Sep 17 00:00:00 2001
From: Daniel Shiffman <daniel@shiffman.net>
Date: Fri, 2 Feb 2018 13:25:21 -0500
Subject: [PATCH] checking if node environment for module

---
 matrix.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/matrix.js b/matrix.js
index 8ccd4c9..af456cb 100644
--- a/matrix.js
+++ b/matrix.js
@@ -140,9 +140,9 @@ class Matrix {
   print() {
     console.table(this.data);
   }
-
-
 }
 
 
-module.exports = Matrix;
+if (typeof module !== 'undefined') {
+  module.exports = Matrix;
+}