1 files changed, 8 insertions, 0 deletions
diff --git a/components/script/dom/navigator.rs b/components/script/dom/navigator.rs
index 8a17b2dbc17..75bd2c13c23 100644
--- a/components/script/dom/navigator.rs
+++ b/components/script/dom/navigator.rs
@@ -12,6 +12,7 @@ use dom::bluetooth::Bluetooth;
 use dom::mimetypearray::MimeTypeArray;
 use dom::navigatorinfo;
 use dom::pluginarray::PluginArray;
+use dom::serviceworkercontainer::ServiceWorkerContainer;
 use dom::window::Window;
 
 #[dom_struct]
@@ -20,6 +21,7 @@ pub struct Navigator {
     bluetooth: MutNullableHeap<JS<Bluetooth>>,
     plugins: MutNullableHeap<JS<PluginArray>>,
     mime_types: MutNullableHeap<JS<MimeTypeArray>>,
+    serviceWorker: MutNullableHeap<JS<ServiceWorkerContainer>>,
 }
 
 impl Navigator {
@@ -29,6 +31,7 @@ impl Navigator {
             bluetooth: Default::default(),
             plugins: Default::default(),
             mime_types: Default::default(),
+            serviceWorker: Default::default(),
         }
     }
 
@@ -99,4 +102,9 @@ impl NavigatorMethods for Navigator {
     fn JavaEnabled(&self) -> bool {
         false
     }
+
+    // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#navigator-service-worker-attribute
+    fn ServiceWorker(&self) -> Root<ServiceWorkerContainer> {
+        self.serviceWorker.or_init(|| ServiceWorkerContainer::new(self.global().r()))
+    }
 }