pwa: add service worker registration script (#25462)

combo/apps/pwa/templates/combo/service-worker-registration.js

@@ -0,0 +1,10 @@
+if ('serviceWorker' in navigator) {
+  navigator.serviceWorker.register('/service-worker.js', {scope: '/'}).then(function(registration) {
+    // Registration was successful
+    console.log('ServiceWorker registration successful with scope: ', registration.scope);
+    swRegistration = registration;
+  }).catch(function(err) {
+    // registration failed :(
+    console.log('ServiceWorker registration failed: ', err);
+  });
+}

combo/apps/pwa/urls.py

@@ -16,9 +16,14 @@
 
 from django.conf.urls import url
 
-from .views import manifest_json, service_worker_js
+from .views import (
+        manifest_json,
+        service_worker_js,
+        service_worker_registration_js,
+        )
 
 urlpatterns = [
     url('^manifest.json$', manifest_json),
     url('^service-worker.js$', service_worker_js),
+    url('^service-worker-registration.js$', service_worker_registration_js),
 ]

combo/apps/pwa/views.py

@@ -30,3 +30,9 @@ def service_worker_js(request, *args, **kwargs):
     template = get_template('combo/service-worker.js')
     return HttpResponse(template.render({}, request),
             content_type='application/javascript; charset=utf-8')
+
+
+def service_worker_registration_js(request, *args, **kwargs):
+    template = get_template('combo/service-worker-registration.js')
+    return HttpResponse(template.render({}, request),
+            content_type='application/javascript; charset=utf-8')