根据已有的下拉框内容进行搜索

dropdown-list-search.js

$(document).ready(function(){
  $('.logo-live-search-list li').each(function(){
   $(this).attr('data-search-term', $(this).text());
  });
  $('.logo-live-search-box').on('keyup', function(){
    var searchTerm = $(this).val();
      $('.logo-live-search-list li').each(function(){
          if ($(this).filter('[data-search-term *= ' + searchTerm + ']').length > 0 || searchTerm.length < 1) {
              $(this).show();
          } else {
              $(this).hide();
          }
      });
  });
});