Mat datepicker只格式化多个选择器中的一个

<mat-form-field>
  <input matInput [matDatepicker]="datepicker1" id="datepicker1">
  <mat-datepicker-toggle matSuffix [for]="datepicker1"></mat-datepicker-toggle>
  <mat-datepicker #datepicker1></mat-datepicker>
</mat-form-field>

<mat-form-field>
  <input matInput [matDatepicker]="datepicker2" id="datepicker2">
  <mat-datepicker-toggle matSuffix [for]="datepicker2"></mat-datepicker-toggle>
  <mat-datepicker #datepicker2></mat-datepicker>
</mat-form-field>

import { Component, ViewChild, ElementRef, AfterViewInit } from '@angular/core';
import { MatDatepicker } from '@angular/material/datepicker';

@Component({
  selector: 'app-datepicker-example',
  templateUrl: './datepicker-example.component.html',
  styleUrls: ['./datepicker-example.component.css']
})
export class DatepickerExampleComponent implements AfterViewInit {
  @ViewChild('datepicker1') datepicker1: MatDatepicker<any>;
  @ViewChild('datepicker2') datepicker2: MatDatepicker<any>;

  ngAfterViewInit() {
    const datepicker1Element = this.datepicker1._elementRef.nativeElement;
    const datepicker2Element = this.datepicker2._elementRef.nativeElement;

    // 格式化第一个日期选择器
    this.datepicker1.format(datepicker1Element, 'yyyy-MM-dd');

    // 不对第二个日期选择器进行格式化
  }
}