Can a block element be divided "left and right" so that a white line passes through it in HTML ?¿?

Question

HTML

Answer 1

I think I understand what you are going for visually, but maybe not functionally.

Within a div (generic block element), you can have two elements that sit inside the div side-by-side. You can then set a white right border for the first element (the one on the left) and /or a white left border for the second element (the one on the right).

That's one of many options.

Answer 2

Maybe you could clarify your question/problem?

Anyway, if your goal is to get block styled as multi-column text, you should check these css related links:

https://developer.mozilla.org/en-US/docs/Web/CSS/columns
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Columns/Using_multi-column_layouts