我在typescript中得到getdate不是ngbdatepicker中的函数

import { Component } from '@angular/core';
import { NgbDateStruct, NgbCalendar } from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'app-datepicker',
  template: `
    <ngb-datepicker [(ngModel)]="selectedDate" (ngModelChange)="onDateSelect($event)"></ngb-datepicker>
    <div>Selected Date: {{ selectedDate | json }}</div>
  `
})
export class DatepickerComponent {
  selectedDate: NgbDateStruct;

  constructor(private calendar: NgbCalendar) {}

  onDateSelect(date: NgbDateStruct) {
    // 处理选中日期的逻辑
    console.log(date);
  }
}