From a5819c492e5eed495c332f0221fd134af24b60cb Mon Sep 17 00:00:00 2001
From: Henri Bergius <henri.bergius@iki.fi>
Date: Thu, 27 Dec 2018 15:31:50 +0100
Subject: [PATCH] Handle past-time

---
 countdown/index.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/countdown/index.html b/countdown/index.html
index d0d0f09..aefc365 100644
--- a/countdown/index.html
+++ b/countdown/index.html
@@ -50,6 +50,9 @@
       };
       function prettyPrintTime(value) {
         var sec_num = parseInt(value, 10);
+        if (sec_num < 0) {
+          return '00:00';
+        }
         var hours   = Math.floor(sec_num / 3600);
         var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
         var seconds = sec_num - (hours * 3600) - (minutes * 60);