example reactive form angular
Example: angular reactive form
<!-- main app container -->
<div class="card m-3">
<h5 class="card-header">Angular 8 Reactive Form Validation</h5>
<div class="card-body">
<form [formGroup]="registerForm" (ngSubmit)="onSubmit()">
<div class="form-row">
<div class="form-group col">
<label>Title</label>
<select formControlName="title" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.title.errors }">
<option value=""></option>
<option value="Mr">Mr</option>
<option value="Mrs">Mrs</option>
<option value="Miss">Miss</option>
<option value="Ms">Ms</option>
</select>
<div *ngIf="submitted && f.title.errors" class="invalid-feedback">
<div *ngIf="f.title.errors.required">Title is required</div>
</div>
</div>
<div class="form-group col-5">
<label>First Name</label>
<input type="text" formControlName="firstName" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.firstName.errors }" />
<div *ngIf="submitted && f.firstName.errors" class="invalid-feedback">
<div *ngIf="f.firstName.errors.required">First Name is required</div>
</div>
</div>
<div class="form-group col-5">
<label>Last Name</label>
<input type="text" formControlName="lastName" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.lastName.errors }" />
<div *ngIf="submitted && f.lastName.errors" class="invalid-feedback">
<div *ngIf="f.lastName.errors.required">Last Name is required</div>
</div>
</div>
</div>
<div class="form-group">
<label>Email</label>
<input type="text" formControlName="email" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.email.errors }" />
<div *ngIf="submitted && f.email.errors" class="invalid-feedback">
<div *ngIf="f.email.errors.required">Email is required</div>
<div *ngIf="f.email.errors.email">Email must be a valid email address</div>
</div>
</div>
<div class="form-row">
<div class="form-group col">
<label>Password</label>
<input type="password" formControlName="password" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.password.errors }" />
<div *ngIf="submitted && f.password.errors" class="invalid-feedback">
<div *ngIf="f.password.errors.required">Password is required</div>
<div *ngIf="f.password.errors.minlength">Password must be at least 6 characters</div>
</div>
</div>
<div class="form-group col">
<label>Confirm Password</label>
<input type="password" formControlName="confirmPassword" class="form-control" [ngClass]="{ 'is-invalid': submitted && f.confirmPassword.errors }" />
<div *ngIf="submitted && f.confirmPassword.errors" class="invalid-feedback">
<div *ngIf="f.confirmPassword.errors.required">Confirm Password is required</div>
<div *ngIf="f.confirmPassword.errors.mustMatch">Passwords must match</div>
</div>
</div>
</div>
<div class="form-group form-check">
<input type="checkbox" formControlName="acceptTerms" id="acceptTerms" class="form-check-input" [ngClass]="{ 'is-invalid': submitted && f.acceptTerms.errors }" />
<label for="acceptTerms" class="form-check-label">Accept Terms & Conditions</label>
<div *ngIf="submitted && f.acceptTerms.errors" class="invalid-feedback">Accept Ts & Cs is required</div>
</div>
<div class="text-center">
<button class="btn btn-primary mr-1">Register</button>
<button class="btn btn-secondary" type="reset" (click)="onReset()">Cancel</button>
</div>
</form>
</div>
</div>