如何以角度形式实现速记验证？

Question

如何在角度形式中使用验证我已经尝试过

<div class="form-group col-sm-6">
<label for="exampleInputPassword1">Email</label>
<input type="text" class="form-control" formControlName="toEmail" >
<div *ngIf="form.controls['toEmail'].errors?.required && 
form.controls['toEmail'].errors?.email">
Enter correct email
</div>

Answer 1

<div *ngIf="form.controls['controlName'].dirty && form.controls['controlName'].invalid"> 
       <p *ngIf="group.controls['controlName'].errors['required']">required message here..</p> 
       <p *ngIf="group.controls['controlName'].errors['email']">Email validation message here..</p> 
  </div>