如何使用反应式从Angular material-datepicker中获取键盘输入的值？

<form [formGroup]="myForm">
  <mat-form-field>
    <input matInput [matDatepicker]="picker" formControlName="date">
    <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
    <mat-datepicker #picker></mat-datepicker>
  </mat-form-field>
</form>

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponentComponent implements OnInit {
  myForm: FormGroup;

  constructor(private formBuilder: FormBuilder) { }

  ngOnInit() {
    this.myForm = this.formBuilder.group({
      date: ['']
    });

    this.myForm.get('date').valueChanges.subscribe(value => {
      console.log(value); // 获取键盘输入的值
    });
  }
}