Angular2, Nodes

• 可以通过扩展RouterOutletDirective来实现权限控制
• 使用FormBuilder和ng-form-model进行自定义表单验证
• 使用AsyncRouter（即在RouterConfig里面设置loader）实现components的异步加载
• 一个Component的生命周期hook:
  • OnChanges (if any bindings have changed),
  • OnInit (after the first check only),
  • DoCheck,
  • AfterContentInit,
  • AfterContentChecked,
  • AfterViewInit,
  • AfterViewChecked,
  • OnDestroy (at the very end before destruction) Implement this interface to get notified when any data-bound property of your directive changes.