verified_user Basic Validation Setup
To implement form validation, you need to include the following dependencies in your component file.
import { FormBuilder, FormGroup, Validators, FormControl } from '@angular/forms';codeHTML Template
Template with error messages and validation states.
<form class="register-form m-4" [formGroup]="register" (ngSubmit)="onRegister()">
<div class="row">
<div class="col-xl-6 col-lg-6 col-md-12 col-sm-12 mb-2">
<mat-form-field class="example-full-width" appearance="outline">
<mat-label>First name </mat-label>
<input matInput formControlName="first" required>
<mat-icon matSuffix>face </mat-icon>
<mat-error *ngIf="register.get('first').hasError('required')">
First name is required
</mat-error>
</mat-form-field>
</div>
<div class="col-xl-6 col-lg-6 col-md-12 col-sm-12 mb-2">
<mat-form-field class="example-full-width" appearance="outline">
<mat-label>Last name </mat-label>
<input matInput formControlName="last">
<mat-icon matSuffix>face </mat-icon>
</mat-form-field>
</div>
</div>
<div class="row">
<div class="col-xl-12 col-lg-12 col-md-12 col-sm-12 mb-2">
<mat-checkbox class="example-margin"
formControlName="termcondition">I accept terms
and conditions
</mat-checkbox>
</div>
</div>
<div class="row">
<div class="col-xl-12 col-lg-12 col-md-12 col-sm-12 mb-2">
<button class="mr-3" mat-raised-button color="primary" [disabled]="!register.valid">Submit </button>
<button type="button" mat-button>Cancel </button>
</div>
</div>
</form>settings_ethernetComponent Logic
Configure validators in your
FormGroup.
register: FormGroup;
ngOnInit() {
this.register = this.fb.group({
first: ['', [Validators.required, Validators.pattern('[a-zA-Z]+')]],
last: [''],
termcondition: [false, [Validators.requiredTrue]],
})
}