From d600d8c31724ef6f150ed9faf1d0eb0d28ee77e5 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Thu, 4 Oct 2018 21:10:41 -0400
Subject: [PATCH] same before config.onUpdate
---
packages/react-scripts/template/src/serviceWorker.js | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/packages/react-scripts/template/src/serviceWorker.js b/packages/react-scripts/template/src/serviceWorker.js
index a0153cb4c..46c98a440 100644
--- a/packages/react-scripts/template/src/serviceWorker.js
+++ b/packages/react-scripts/template/src/serviceWorker.js
@@ -68,7 +68,7 @@ function registerValidSW(swUrl, config) {
console.log('New content is available; please refresh.');
// Execute callback
- if (config.onUpdate) {
+ if (config && config.onUpdate) {
config.onUpdate(registration);
}
} else {
--
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