TODO：页面滚动条/modal内滚动条，单独写用例吧？
<div style="margin-top: 1000px">
  <button (click)="show()" tiButton>show two Modals</button>
  <button (click)="showModal()" tiButton>show two same id Modals</button>
  <button (click)="showMoreModals()" tiButton>show 3 Modals</button>
  <button (click)="closeOneShowAnother()" tiButton>show another modal when close one modal</button>
</div>