You may check out the mdn docs or w3schools. Basically counter is used to count elements, counter-increment increments the count for the counter and counter-reset resets it (used to start the count from 1 again incase multiple ol tags are present in the page). I used the name itemCounter, but you may name it as you please
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can you tell me more about counter, itemCounter (::marker)? & how it works or any reference links
You may check out the mdn docs or w3schools. Basically counter is used to count elements,
counter-incrementincrements the count for the counter andcounter-resetresets it (used to start the count from 1 again incase multipleoltags are present in the page). I used the name itemCounter, but you may name it as you please