>:valid</code> pseudoclass on the <code>form</code> tag.</div>
                </div>
              </div>
            </div>
            <hr>
            <h2 id="auto_required">Auto required hints</h2>
            <p>We can auto-add asterisks ( * ) to the label of required fields! Here's how to do this:</p>
            <ol>
              <li>add a <code>mark-required</code> class to your form;</li>
              <li>add a <code>&lt;div class=&quot;input&quot;&gt;</code> wrapping your label and your input</