From daf8df1ab3106ed0023dbfc1aba6fad830dfe4a8 Mon Sep 17 00:00:00 2001
From: Jeffrey Posnick <jeffy@google.com>
Date: Wed, 15 Nov 2017 13:51:35 -0500
Subject: [PATCH] Add a localhost-only log message pointing folks to the PWA
docs. (#3455)
---
.../react-scripts/template/src/registerServiceWorker.js | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/packages/react-scripts/template/src/registerServiceWorker.js b/packages/react-scripts/template/src/registerServiceWorker.js
index 12542ba22..a3e6c0cfc 100644
--- a/packages/react-scripts/template/src/registerServiceWorker.js
+++ b/packages/react-scripts/template/src/registerServiceWorker.js
@@ -35,6 +35,15 @@ export default function register() {
if (isLocalhost) {
// This is running on localhost. Lets check if a service worker still exists or not.
checkValidServiceWorker(swUrl);
+
+ // Add some additional logging to localhost, pointing developers to the
+ // service worker/PWA documentation.
+ navigator.serviceWorker.ready.then(() => {
+ console.log(
+ 'This web app is being served cache-first by a service ' +
+ 'worker. To learn more, visit https://goo.gl/SC7cgQ'
+ );
+ });
} else {
// Is not local host. Just register service worker
registerValidSW(swUrl);
--
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