dart - Material Design Lite Dart，提神醒脑

Question

MDL Dart http://www.material-design-lite.pub中是否有一个简单的自定义组件示例，使用数据表或链接到随时间变化的模型的列表？

我有例外

     Exception: Uncaught Error: RangeError: Index out of range: index should be less than 6: 6
Stack Trace:
#0      HtmlCollection.[] (dart:html:17296)
#1      _ChildrenElementList.[] (dart:html:10623)
#2      MaterialRepeat.insert.<insert_async_body> (package:mdl/src/template/components/MaterialRepeat.dart:148:55)
#3      Future.Future.microtask.<anonymous closure> (dart:async/future.dart:144)
#4      _microtaskLoop (dart:async/schedule_microtask.dart:43)
#5      _microtaskLoopEntry (dart:async/schedule_microtask.dart:52)
#6      _ScheduleImmediateHelper._handleMutation (dart:html:42503)

更新列表时使用自定义ToDo 示例items