From 6fdc430c4f18c5a112ae75b029ff66a65950aa38 Mon Sep 17 00:00:00 2001
From: Danny Coates <dannycoates@gmail.com>
Date: Fri, 16 Nov 2018 12:31:36 -0800
Subject: [PATCH] delete old service worker caches

---
 app/serviceWorker.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/app/serviceWorker.js b/app/serviceWorker.js
index 91c885f1..e325e785 100644
--- a/app/serviceWorker.js
+++ b/app/serviceWorker.js
@@ -80,9 +80,15 @@ async function decryptStream(id) {
 }
 
 async function precache() {
+  const oldCaches = await caches.keys();
+  for (const c of oldCaches) {
+    if (c !== version) {
+      await caches.delete(c);
+    }
+  }
   const cache = await caches.open(version);
-  const x = assets.match(/.*\.(png|svg|jpg)$/);
-  await cache.addAll(x);
+  const images = assets.match(/.*\.(png|svg|jpg)$/);
+  await cache.addAll(images);
   return self.skipWaiting();
 }