I am trying to modify the option in Thymeleaf so that the table can show me only selected item, after clicking the option. Here is my code:

 <th>
 <select th:onchange="???" id="stateSelect" class="form-control" th:field="*{receiverType}">
       <option th:value='NULL'>All aggregators</option>
       <option th:each="receiverType : ${receiverTypes}"
               th:value="${receiverType}"
               th:text="${receiverType}">
       </option>
    </select>
</th>

I know that i should use onchange , but i am confused.