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在危險的錯誤消息已經創建形式FIRST_NAME和另外姓氏.. 是否有角2任何一般形式的驗證,也是我表現出在客戶端的錯誤消息。如何顯示危險!如何顯示在角2
貝婁是我的代碼
HTML文件
<form [formGroup]="myForm" (ngSubmit)="submit()" >
<ion-item>
<ion-label primary floating>FIRST NAME</ion-label>
<ion-input type="text" id="firstname" class="form-control" formControlName="firstname" minlength="4" maxlength="12" required ></ion-input>
</ion-item>
<p *ngIf="myForm.controls.firstname.errors && myForm.controls.firstname.dirty " danger > FirstName is required (b/w 4-12 chars)</p>
<ion-item>
<ion-label primary floating>LAST NAME</ion-label>
<ion-input type="text" id="lastname" class="form-control" formControlName="lastname" minlength="4" maxlength="10" required ></ion-input>
</ion-item>
<p *ngIf="myForm.controls.lastname.errors && myForm.controls.lastname.dirty " danger> LastName is required (b/w 1-10 chars)</p>
</form>
告訴我如何顯示錯誤信息處於危險之中!
這是離子的應用程序? –
是離子型應用! –
https://angular.io/docs/ts/latest/cookbook/form-validation.html#!#sts=Reactive%20Forms –