解除前角度NGB模式不工作

我想在弹出模式关闭之前添加一个类,然后在关闭之前等待一段时间。看看文档,我可以用它来存档 beforeDismiss NgbModalOptions 期权; https://ng-bootstrap.github.io/#/components/modal/examples

但它不起作用。这是我的开放式方法;

  open(content) {
    const options : NgbModalOptions = {
      size: 'lg',
      windowClass: 'animated bounceInUp',
      beforeDismiss: () => {
        setTimeout(()=>{
          alert ('Hello!');
        },2000);
        return false;
      }
    };
    this.modalRef = this.modalService.open(content, options).result.then((result) => {
      //this.closeResult = `Closed with: ${result}`;
    }, (reason) => {
      //this.closeResult = `Dismissed ${this.getDismissReason(reason)}`;
    });
    console.log (this.modalRef);
  }

this.modalRef.close 但这显示了一个错误modalRef。关闭不是一个函数。

使现代化

<ng-template #content let-c="close" let-d="dismiss">
  <div class="modal-header">
    <h4 class="modal-title">Save As Site Product Settings</h4>
    <button type="button" class="close" aria-label="Close" (click)="d('Cross click')">
      <span aria-hidden="true">&times;</span>
    </button>
  </div>
  <div class="modal-body">
    {{product.title}}
  </div>
  <div class="modal-footer">
    <button type="button" class="btn btn-primary" (click)="saveProductAs()">Save As Site Product</button>
    <button type="button" class="btn btn-outline-dark" (click)="c('Close click')">Close</button>
  </div>
</ng-template>

我发现它不适用于这一点 <button type="button" class="btn btn-outline-dark" (click)="c('Close click')">Close</button> c('Close click') ?