Counters (CSS)The counter-reset and counter-increment CSS properties and the counter() and counters() functions automatically number headings or ordered list items.countersCounterswidely2015-07-292018-01-29https://drafts.csswg.org/css-lists-3/#auto-numberingcss-countershttps://developer.mozilla.org/docs/Web/CSS/Reference/Values/countercss.properties.counter-incrementcss.properties.counter-increment.list-itemcss.properties.counter-increment.nonecss.properties.counter-resetcss.properties.counter-reset.list-itemcss.properties.counter-reset.nonecss.properties.counter-reset.reset_does_not_affect_siblingscss.types.countercss.types.countershttps://nowyoucanuse.com/features--counters.html