How did clicking on a link on one page open a specific slide (Slick slider) on another page?

Question

JavaScript

There are two pages on one link with titles, and on the second slick slider with pictures. How did clicking on the link with the title open the second page and show a specific slide with a picture?

Answer 1

I found an example, but here both links and a slider are located on the same page. And how to make, that on different?
https://codepen.io/anon/pen/LmawKe#4