Hello, Krzysztof,
Thank you for your response.
We understand that you are inquiring about the script name of the sticky sidebar. In this case, you will need to specify the following files that are responsible for this feature:
http://yourwebsite.com/wp-content/themes/xstore/js/modules/libs/jquery.sticky-kit.min.js
http://yourwebsite.com/wp-content/themes/xstore/js/modules/stickySidebar.min.js
Kind Regards,
8theme team