You can also remove query strings from your assets with code. Simply add the following to your WordPress theme’s functions.php file.
If Set the Last-Modified date to the last time the resource was changed. If the Last-Modified date is sufficiently far enough in the past, chances are the browser won't refetch it and Specify a cache validator even with below coding in .htaccess.
If you have only single variation across your shop you can easily change the all drop-down text using simple worpdress filter.
Jquery creates a dropdown and filters records in the datatable based on the dropdown value. About filtering by multiple dropdowns using an "AND" condition is possible using datatables in jQuery.
If you try to do something with the elements that are dynamically added to DOM using the jQuery click() method it will not work, because it bind the click event only to the elements that exist at the time of binding. To bind the click event to all existing and future elements, use the jQuery on() method.