How to add subway station selection to drupal filter?

Question

Drupal

Good afternoon. Can you please tell me how to implement the choice of subway?
You need to do it like on this site: blackwood.ru/catalog/city

Answer 1

Drupal has nothing to do with this choice. This is a regular popup window, in which all the logic is in javascript. This window controls the value attribute of the input with the id filter-city-buy-metro, and it affects the results. See the code and try to do the same.