CSS Auto Heading Numbering

CSS counters provide a powerful way to automatically number headings in HTML documents without JavaScript or manual updates. This technique uses the counter-reset and counter-increment properties to create hierarchical numbering, such as 1., 1.1., 1.1.1., and so on. In this demo, we apply counters to h2 through h6 elements, resetting at each level for proper nesting. An optional “nocount” class allows skipping numbering for specific headings, maintaining continuity. This approach ensures consistent, dynamic numbering that updates automatically as content changes.