I have a list like this one:
<li> .... </li>
<li> .... </li>
<li> .... </li>
<li class="active"> .... </li>
<li> .... </li>
I want to find out the index (number in the list) of the item with the "active" class element. in this case the index would be 4 (or 3 if we're starting from 0) How can I do that?
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