From db8e0c14fb3e74399284639adf6c52a824ccba3b Mon Sep 17 00:00:00 2001
From: Mitchell McCaffrey <mitchemmc@gmail.com>
Date: Fri, 24 Apr 2020 16:18:17 +1000
Subject: [PATCH] Fix bug with map staying live after deletion

---
 src/helpers/useDataSource.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/helpers/useDataSource.js b/src/helpers/useDataSource.js
index a57f69d..002951c 100644
--- a/src/helpers/useDataSource.js
+++ b/src/helpers/useDataSource.js
@@ -6,6 +6,7 @@ function useDataSource(data, defaultSources) {
   const [dataSource, setDataSource] = useState(null);
   useEffect(() => {
     if (!data) {
+      setDataSource(null);
       return;
     }
     let url = null;