Layout similar to Appear.in

Question

Is there a library or some example out there to create a dynamic layout (group call style) similar to the one used in https://appear.in ?

Edit: I've already tried a "flexbox" solution. It doesn't work.

Thanks

Answer 1

Check out this question about maximizing squares in a rectangle.

You can compute an (optimistic) upper bound by dividing the total surface by the number of squares: sqrt(width*height/n).