如何使用ngx-bootstrap datepicker禁用angular中的今天和未来日期？

<input type="text" class="form-control" bsDatepicker [(bsValue)]="selectedDate">

import { Component } from '@angular/core';
import { BsDatepickerConfig } from 'ngx-bootstrap/datepicker';

@Component({
  selector: 'app-datepicker',
  templateUrl: './datepicker.component.html',
  styleUrls: ['./datepicker.component.css']
})
export class DatepickerComponent {
  selectedDate: Date;
  bsConfig: Partial<BsDatepickerConfig>;

  constructor() {
    this.bsConfig = Object.assign({}, { containerClass: 'theme-dark-blue', dateInputFormat: 'YYYY-MM-DD' });
  }

  isDisabledDate(date: Date): boolean {
    const today = new Date();
    return date >= today;
  }
}

<input type="text" class="form-control" bsDatepicker [(bsValue)]="selectedDate" [bsConfig]="bsConfig" [isDisabled]="isDisabledDate">