t type-hint-string">string</a>
      </td>
      <td>
        <p>Adds <code>required</code> attribute and <code>required</code> validation constraint to
   the element when the ngRequired expression evaluates to true. Use <code>ngRequired</code> instead of
   <code>required</code> when you want to data-bind to the <code>required</code> attribute.</p>

        
      </td>
    </tr>
    
    <tr>
      <td>
        ngChange
        
        <div><em>(optional)</em></div>
      </td>
      <td>
        <a hre