Support for observable models, fixes #259

example/todomvc/router_options.html

Index: example/todomvc/router_options.html
diff --git a/example/todomvc/router_options.html b/example/todomvc/router_options.html
index b5fd6547da705c7f2abff6cdc1855431a88d2609..c6c8afd6ce99553ce652f147acbcf1ab0852c334 100644
--- a/example/todomvc/router_options.html
+++ b/example/todomvc/router_options.html
@@ -11,6 +11,7 @@ BSD-style license that can be found in the LICENSE file.
   <script type="application/dart">
   import 'dart:html';
   import 'package:web_ui/web_ui.dart';
+  import 'package:web_ui/observe/html.dart';
 
   /**
    * Given a set of child links to this page, this will add the "selected" CSS
@@ -29,9 +30,7 @@ BSD-style license that can be found in the LICENSE file.
 
       var anchors = this.queryAll('a');
 
-      // TODO(jmesserly): this only works because main() registered for
-      // popState and hashChanged.
-      _stopWatcher = watchAndInvoke(() => window.location.hash, (e) {
+      _stopWatcher = watchAndInvoke(() => locationHash, (e) {
         var hash = e.newValue;
         if (hash == '') hash = '#/';
         for (var a in anchors) {