title: how to use the selected variable for th:text
body: <pre><code>    &lt;select&gt;
          &lt;option th:each="city:${cities}"
                  th:value="${city.value}"
                  th:utext="${city.name}"/&gt;
      &lt;/select&gt;
  
      &lt;div th:text="here"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>how to get the selected value from  to th:text?</p>