Java EE 8 and Angular

Validation

In our issue's reactive form template, we define two input fields for the label and description of the issue and a dropdown for selecting the user. These three inputs are marked as required, and thus we also need to display validation errors if the input has been touched and is invalid:

<form [formGroup]="issueForm" (ngSubmit)="onSave()">...    <input type="text" class="form-control" id="label"           formControlName="label">    <span *ngIf="issueForm.get('label').touched && issueForm.get('label').hasError('required')">      Label is required    </span>     <input type="text" class="form-control" id="description"           formControlName="description">    <span *ngIf="issueForm.get('description').touched && issueForm.get('description').hasError('required')"> Description ...