title: Multiple CSS class on divs
body: <p>I have this div structure and I want to set a CSS class on the input, but it doesn't work.</p>
  
  <pre><code>&lt;div class="form-group"&gt;
      &lt;label for="tbxName"&gt;Name:&lt;/label&gt;
      &lt;div class="input-group"&gt;
          &lt;i class="input-group-addon fa fa-id-card-o" aria-hidden="true"&gt;&lt;/i&gt;
          &lt;form:input type="text" path="name" class="form-control errorValidation" id="tbxName" placeholder="Name"&gt;&lt;/form:input&gt;
      &lt;/div&gt;  &lt;!-- .input-group --&gt;
  &lt;/div&gt; &lt;!-- form-group--&gt;
  </code></pre>
  
  <p>This is my style:</p>
  
  <pre><code>.form-control.errorValidation {
      border-color: 1px solid red;
  }
  </code></pre>