Unregister service worker.

.eslintignore

@@ -3,3 +3,4 @@
 /node_modules/
 /source/assets/js/vendor/
 /source/assets/js/google-analytics.js
+/source/assets/js/sw.js

Gruntfile.js

@@ -79,7 +79,6 @@ module.exports = function(grunt) {
                     '<%= dirs.src %>/assets/js/detect-os.js',
                     '<%= dirs.src %>/assets/js/img-defer.js',
                     '<%= dirs.src %>/assets/js/no-js-class.js',
-                    '<%= dirs.src %>/assets/js/pwa.js',
                     '<%= dirs.src %>/assets/js/google-analytics.js'
                 ],
                 dest: '<%= dirs.dest %>/assets/js/pack.js'
@@ -145,8 +144,7 @@ module.exports = function(grunt) {
             minify: {
                 files: {
                     '<%= concat.js.dest %>': '<%= concat.js.dest %>',
-                    '<%= concat.jqueryJS.dest %>': '<%= concat.jqueryJS.dest %>',
-                    '<%= concat.sw.dest %>': '<%= concat.sw.dest %>'
+                    '<%= concat.jqueryJS.dest %>': '<%= concat.jqueryJS.dest %>'
                 }
             }
         },

source/assets/js/sw.js

@@ -1 +1,23 @@
-// empty for now
+(function() {
+    'use strict';
+
+    if ('serviceWorker' in navigator) {
+        window.addEventListener('load', function() {
+            navigator.serviceWorker.getRegistrations().then(function(registrations) {
+                for (var registration of registrations) {
+                    registration.unregister()
+                        .then(function() {
+                            return self.clients.matchAll();
+                        })
+                        .then(function(clients) {
+                            clients.forEach(function(client) {
+                                if (client.url && 'navigate' in client) {
+                                    client.navigate(client.url);
+                                }
+                            });
+                        });
+                }
+            });
+        });
+    }
+})();