如何在angular中重置ng-select

<ng-select *ngIf="!isReset"
           [items]="items"
           [(ngModel)]="selectedItem">
</ng-select>
<button (click)="resetSelect()">Reset</button>

export class YourComponent {
  items = [{name: 'Item 1'}, {name: 'Item 2'}];
  selectedItem: any;
  isReset = false;

  resetSelect() {
    this.selectedItem = null;
    this.isReset = true;
    setTimeout(() => {
      this.isReset = false;
    }, 0);
  }
}

<ng-select [items]="items"
           [(ngModel)]="selectedItem">
</ng-select>
<button (click)="resetSelect()">Reset</button>

export class YourComponent {
  items = [{name: 'Item 1'}, {name: 'Item 2'}];
  selectedItem: any;

  resetSelect() {
    this.selectedItem = null;
  }
}

<ng-select [items]="items"
           [(ngModel)]="selectedItem"
           #selectControl="ngModel">
</ng-select>
<button (click)="resetSelect(selectControl)">Reset</button>

export class YourComponent {
  items = [{name: 'Item 1'}, {name: 'Item 2'}];
  selectedItem: any;

  resetSelect(selectControl: NgModel) {
    selectControl.valueAccessor.writeValue(null);
    selectControl.markAsPristine();
    selectControl.markAsUntouched();
  }
}