pre fill the input with the default domain

1you can append ng model value to the default specific domain available in span input group
2<label for="inputEmail4">Email</label>
3	<div class="input-group">
4       <input type="text" class="form-control" autocomplete="off"
5           id="email" [(ngModel)]="email" name="email">
6           <div class="input-group-append">
7               <span class="input-group-text pt-1">{{defaultEmail}}</span>
8             </div>
9    </div>