From 894ea86f91dfd9a416c4599cb62bb4dd3463a0d1 Mon Sep 17 00:00:00 2001
From: Alexander Zinchuk <alx.zinchuk@gmail.com>
Date: Fri, 27 Aug 2021 21:08:55 +0300
Subject: [PATCH] Service Worker: Fix broken UI in Safari

---
 src/serviceWorker/assetCache.ts | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/serviceWorker/assetCache.ts b/src/serviceWorker/assetCache.ts
index 71561db8e..11bfd5944 100644
--- a/src/serviceWorker/assetCache.ts
+++ b/src/serviceWorker/assetCache.ts
@@ -7,11 +7,18 @@ export async function respondWithCache(e: FetchEvent) {
   const cached = await cache.match(e.request);
 
   if (cached) {
-    return cached;
+    if (cached.ok) {
+      return cached;
+    } else {
+      await cache.delete(e.request);
+    }
   }
 
   const remote = await fetch(e.request);
-  cache.put(e.request, remote.clone());
+
+  if (remote.ok) {
+    cache.put(e.request, remote.clone());
+  }
 
   return remote;
 }