javascript - Select 的 Val = null，如果值被禁用

Question

我有 Select 并且所有值都被禁用，我如何为这个 Select 设置值？

<select id="testselect">
   <option disabled>1</option>
   <option disabled>2</option>
   <option disabled selected="selected">3</option>
</select>

alert($("#testselect").val()); //result null

jsfiddle

Answer 1

试试这个 ==>

alert($('#testselect option[disabled]:selected').val());

<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<select id="testselect">
  <option disabled>1</option>
  <option disabled>2</option>
  <option disabled selected>3</option>
</select>