angular-docs-cn/aio/content/examples/reactive-forms/src/app/app.component.html

<h1>Reactive Forms</h1>

<nav>
  <a (click)="toggleEditor('name')">Name Editor</a>
  <a (click)="toggleEditor('profile')">Profile Editor</a>
</nav>

<app-name-editor *ngIf="showNameEditor"></app-name-editor>

<app-profile-editor *ngIf="showProfileEditor"></app-profile-editor>