Thuộc tính :selected quá tuyệt cho sự lựa chọn (ok)

<div class="post-tags">
  <select>
    <option value="http://localhost/reset/category/post-formats/" class="tax-filter" title="post-formats">Post Formats</option>
    <option value="http://localhost/reset/category/template-2/" class="tax-filter" title="template-2">Template</option>
    <option value="http://localhost/reset/category/uncategorized/" class="tax-filter" title="uncategorized">Uncategorized</option>
    <option value="http://localhost/reset/category/ween/" class="tax-filter" title="ween">ween</option>
    <option value="http://localhost/reset/category/wellhead/" class="tax-filter" title="wellhead">wellhead</option>
    <option value="http://localhost/reset/category/wellintentioned/" class="tax-filter" title="wellintentioned">wellintentioned</option>
    <option value="http://localhost/reset/category/whetstone/" class="tax-filter" title="whetstone">whetstone</option>
    <option value="http://localhost/reset/category/years/" class="tax-filter" title="years">years</option>
  </select>
</div>

$('.post-tags select').on('change', function(event) {
    event.preventDefault();
    var selecetd_taxonomy = $(this).find('option:selected').attr('title');
    console.log(selecetd_taxonomy);
 });