Add a localhost-only log message pointing folks to the PWA docs. (#3455)

daf8df1a · Jeffrey Posnick · Joe Haddad · 801fec28 · daf8df1a
Commit daf8df1a authored 7 years ago by Jeffrey Posnick Committed by Joe Haddad 7 years ago
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--- 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);