Try Dart 1 hour experience first draft

src/site/articles/trydart/examples/2-inputnamebadge/piratebadge.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:html';
+
+InputElement inputNameElement;
+
+void  main() {
+  inputNameElement = query('#inputName');
+  inputNameElement.onChange.listen(generateBadge);
+}
+
+void generateBadge(Event event) {
+  query('#badgeName').text = inputNameElement.value;
+}