How is the Leroy Merlin menu arranged?

Question

1C-Bitrix

Leroymerlin updated the site and they have a very interesting solution in the menu
, for example, if you click on the menu, then we will see the structure of the sections,
and if you click on the New Year's goods section, then we will not go to the page, but a menu with elements of this section will open, and so on ad infinitum if there is section nesting.
For example, this element already leads to the page
. Hence the question is how to implement this solution, what thoughts do you have.
I think this is based on the bitrix:catalog.section.list component, but I still don’t understand how to implement the transition to subsections

Answer 1

It seems to me that I found something similar https://codepen.io/Shven/pen/chKqD

Answer 2

Try to ask a question on Habré, they are actively promoting their section, maybe they will help