Initial add from apps

packages/ui-keyring/src/observable/development.ts

@@ -0,0 +1,16 @@
+// Copyright 2017-2018 @polkadot/ui-keyring authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BehaviorSubject } from 'rxjs';
+
+const subject = new BehaviorSubject(false);
+
+export default {
+  isDevelopment: (): boolean =>
+    subject.getValue(),
+  set: (isDevelopment: boolean): void => {
+    subject.next(isDevelopment);
+  },
+  subject
+};