Two approaches to forms

Angular offers developers the ability to build feature-rich forms. Form capabilities alone can make using Angular a compelling choice. In the HTML world, a form is represented by the <form> tag placed somewhere in the HTML code of a page. Here's a simple form, which uses bootstrap CSS for styling and captures the user input, such as email and phone:

<form class="form-inline">
     <div class="form-group">
        <input type="text" class="form-control" id="email" 
name="email" placeholder="Email">
     </div>
     <div class="form-group">
        <input type="text" class="form-control" id="phone" 
name="phone" placeholder="Phone">
     </div> 
     <button type="submit" class="btn btn-primary">Save</button>
</form>

The form doesn't have the action attribute defined, since it won't directly POST to a server. The two form inputs, email and phone, are submitted by clicking the Save button. We could ignore...