Merge remote-tracking branch 'refs/remotes/twbs/v4-dev' into v4-dev

2 files changed, 35 insertions, 10 deletions

diff --git a/assets/js/src/application.js b/assets/js/src/application.js
index e1b9721a0..9c236b7c4 100644
--- a/assets/js/src/application.js
+++ b/assets/js/src/application.js
@@ -96,15 +96,10 @@
         .tooltip('_fixTitle')
     })
 
+    anchors.options = {
+      icon: '#'
+    }
+    anchors.add('.bd-content > h2, .bd-content > h3, .bd-content > h4, .bd-content > h5')
+    $('.bd-content > h2, .bd-content > h3, .bd-content > h4, .bd-content > h5').wrapInner('<div></div>')
   })
-
 }(jQuery))
-
-;(function () {
-  'use strict'
-
-  anchors.options = {
-    icon: '#'
-  }
-  anchors.add('.bd-content > h2, .bd-content > h3, .bd-content > h4, .bd-content > h5')
-}())
diff --git a/assets/js/src/pwa.js b/assets/js/src/pwa.js
new file mode 100644
index 000000000..5e1a43b08
--- /dev/null
+++ b/assets/js/src/pwa.js
@@ -0,0 +1,30 @@
+/* eslint no-console:off */
+
+(function setupSW() {
+  'use strict'
+
+  if ('serviceWorker' in navigator) {
+    window.addEventListener('load', function () {
+      navigator.serviceWorker.register('/sw.js').then(function (registration) { // eslint-disable-line compat/compat
+        console.log('ServiceWorker registration successful with scope: ', registration.scope)
+        registration.onupdatefound = function () {
+          var installingWorker = registration.installing
+          installingWorker.onstatechange = function () {
+            switch (installingWorker.state) {
+              case 'installed':
+                if (navigator.serviceWorker.controller) { // eslint-disable-line compat/compat
+                  console.log('new update available')
+                  location.reload(true)
+                }
+                break
+
+              default:
+            }
+          }
+        }
+      }).catch(function (err) {
+        console.log('ServiceWorker registration failed: ', err)
+      })
+    })
+  }
+}())