How to make tiles with the ability to add new pictures?

Question

css

1) How to make such tiles? With Masonry or is there something better?
2) How to make it possible to add new pictures? Is there any library?
3) How to customize the scrollbar, give it your own style?

Answer 1

How to make such tiles?

code pen

How to make it possible to add new pictures?

The first thing that comes to mind is to make a selection from the database. Personally, I would do so.

How to customize the scrollbar, give it your own style?

Check out these libraries