From f1f846045f26518525d5484ed9e782b73086ebe4 Mon Sep 17 00:00:00 2001
From: unarist <m.unarist@gmail.com>
Date: Thu, 29 Mar 2018 21:57:02 +0900
Subject: [PATCH] Fix ReferenceError when Cache API is missing (#6953)
Cache API is not supported on Safari 11.0 / iOS 11.
Since those caching is optional, this patch simply ignores it.
---
app/javascript/mastodon/storage/modifier.js | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/app/javascript/mastodon/storage/modifier.js b/app/javascript/mastodon/storage/modifier.js
index 63e49fe6ed..1bec04d0fd 100644
--- a/app/javascript/mastodon/storage/modifier.js
+++ b/app/javascript/mastodon/storage/modifier.js
@@ -4,7 +4,10 @@ import { autoPlayGif } from '../initial_state';
const accountAssetKeys = ['avatar', 'avatar_static', 'header', 'header_static'];
const avatarKey = autoPlayGif ? 'avatar' : 'avatar_static';
const limit = 1024;
-const asyncCache = caches.open('mastodon-system');
+
+// ServiceWorker and Cache API is not available on iOS 11
+// https://webkit.org/status/#specification-service-workers
+const asyncCache = window.caches ? caches.open('mastodon-system') : Promise.reject();
function put(name, objects, onupdate, oncreate) {
return asyncDB.then(db => new Promise((resolve, reject) => {
--
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