From 50c9dcd63ba0df8f25718dc4fe33baac15de088b Mon Sep 17 00:00:00 2001
From: Megan-Wright <meganw33@hotmail.com>
Date: Wed, 9 Sep 2020 16:25:12 +0100
Subject: [PATCH] Make sure lifespan gain doesn't go below zero

---
 ClimateMonitorV2/public/javascripts/new_mapping.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ClimateMonitorV2/public/javascripts/new_mapping.js b/ClimateMonitorV2/public/javascripts/new_mapping.js
index af5db88..cd4a859 100644
--- a/ClimateMonitorV2/public/javascripts/new_mapping.js
+++ b/ClimateMonitorV2/public/javascripts/new_mapping.js
@@ -108,7 +108,13 @@ function lifeSpan(PM10, PM2) {
         return (0)
     }
     else {
-        return ((PM10inc * 7) + (PM2inc * 12))
+        const lifespan = ((PM10inc * 7) + (PM2inc * 12));
+        if (lifespan <= 0) {
+            return 0;
+        }
+        else {
+            return lifespan;
+        }
     }
 }
 function lifespan_display(PM10, PM2, id, preface) {