angular-cn/public/docs/_examples/ngmodule/ts/app/app.component.2.ts

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `
    <app-title [subtitle]="subtitle"></app-title>
    <app-contact></app-contact>
  `
})
export class AppComponent {
  subtitle = '(v2)';
}