0.2.0 - Mid migration

web/node_modules/workbox-navigation-preload/src/isSupported.ts

@@ -0,0 +1,25 @@
+/*
+  Copyright 2018 Google LLC
+
+  Use of this source code is governed by an MIT-style
+  license that can be found in the LICENSE file or at
+  https://opensource.org/licenses/MIT.
+*/
+
+import './_version.js';
+
+
+// Give TypeScript the correct global.
+declare let self: ServiceWorkerGlobalScope;
+
+/**
+ * @return {boolean} Whether or not the current browser supports enabling
+ * navigation preload.
+ *
+ * @memberof module:workbox-navigation-preload
+ */
+function isSupported(): boolean {
+  return Boolean(self.registration && self.registration.navigationPreload);
+}
+
+export {isSupported};