如何为使用过的角度材料的DatePicker添加FormValidation？

<form id="myForm">
  <mat-form-field>
    <input matInput [matDatepicker]="picker" placeholder="选择日期" name="date" id="date">
    <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
    <mat-datepicker #picker></mat-datepicker>
  </mat-form-field>
</form>

document.addEventListener('DOMContentLoaded', function() {
  FormValidation.formValidation(
    document.getElementById('myForm'), {
      fields: {
        date: {
          validators: {
            notEmpty: {
              message: '日期不能为空'
            },
            date: {
              format: 'YYYY-MM-DD',
              message: '日期格式不正确'
            }
          }
        }
      }
    }
  );
});