angular_simple-validation.html

<div ng-app="app">
  <form name="aForm" novalidate>
    <label for="name">Your email</label>
    <input type="email" id="name" ng-model="name" name="aField" required>
    <ng-messages for="aForm.aField.$error">
      <ng-message when="required">This field is required</ng-message>
      <ng-message when="email">Please enter proper email address</ng-message>
    </ng-messages>
    <button ng-click="save()">Send</button>
  </form>
</div>