Adding a button in angular

template:`
  <h1>{{ title }} ({{title.length}})</h1>
  <input [(ngModel)]="title">
  <h2 *ngIf="title.length>15"> the title is long!!!</h2>
  <button (click)="click()">my button</button>
  
`
})
@Injectable()
export class AppComponent {
  
    title = 'the title';
     click() {
         this.title += "button was clicked";
     }
}
const apiUrl = '/dataApi/'; 

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