CSS Lists and Counters is a module of CSS that defines how lists are laid out, how the list marker can be styled and how authors can create new counters.

CSS CSS Lists and Counters CSS Reference Overview

The ::marker CSS pseudo-element represents the marker box of a list item (e.g. the bullet point or item number).

CSS CSS Lists and Counters CSS Pseudo-element Experimental Layout NeedsBrowserCompatibility NeedsExample NeedsMobileBrowserCompatibility Pseudo-element Reference Web