From 070b39a5174fc0259e11d1d21dcf84cda39bb082 Mon Sep 17 00:00:00 2001
From: Luciano Ayres <lucianofarias@gmail.com>
Date: Sat, 5 Nov 2022 18:49:30 -0300
Subject: [PATCH] fix: prevent type error on the arrow button

Fixes a type error bug when the user clicks on the arrow button after calculating the result of a previous operation.
---
 static/calculator.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/static/calculator.js b/static/calculator.js
index efc7afde..ce3035ca 100644
--- a/static/calculator.js
+++ b/static/calculator.js
@@ -70,7 +70,8 @@ function handleSymbol(value) {
       if (buffer.length === 1) {
         buffer = "0";
       } else {
-        buffer = buffer.substring(0, buffer.length - 1);
+        const bufferString = buffer.toString()
+        buffer = bufferString.substring(0, bufferString.length - 1);
       }
       break;
     case "+":