From b400db8216dd47ac1e9f02547ac417d86244eaf1 Mon Sep 17 00:00:00 2001
From: William Blythe <wbwilliam7@gmail.com>
Date: Fri, 4 Jan 2019 08:01:02 +1100
Subject: [PATCH] only cache if not 404

---
 src/sw.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/sw.js b/src/sw.js
index 5eb5d3e0..9a724691 100644
--- a/src/sw.js
+++ b/src/sw.js
@@ -8,7 +8,13 @@ if (workbox) {
 
   workbox.routing.registerRoute(
     new RegExp('/(.*?)'),
-    workbox.strategies.staleWhileRevalidate()
+    workbox.strategies.staleWhileRevalidate({
+      plugins: [
+        new workbox.cacheableResponse.Plugin({
+          statuses: [0, 200]
+        })
+      ]
+    })
   );
 
   workbox.routing.registerRoute(