如何检测我的formGroup中的哪些输入域是模糊的，Angular 9

import { FormGroup, FormControl } from '@angular/forms';

myForm: FormGroup;

constructor() {
  this.myForm = new FormGroup({
    name: new FormControl(''),
    email: new FormControl(''),
    address: new FormControl('')
  });
}

<form [formGroup]="myForm">
  <input type="text" formControlName="name">
  <input type="email" formControlName="email">
  <input type="text" formControlName="address">
</form>

checkFuzzyFields() {
  Object.keys(this.myForm.controls).forEach(field => {
    const control = this.myForm.get(field);
    if (control.value.trim() === '') {
      console.log(field + ' is fuzzy');
    }
  });
}