@Component({
  selector: 'app-key-up2',
  template: `
    ‹input #box (keyup)="onKey(box.value)"›
    ‹p›{{values}}‹/p›
  `
})
export class KeyUpComponent_v2 {
  values = '';
  onKey(value: string) {
    this.values += value + ' | ';
  }
}