jQuery a method that displays an li index number in ul

This example shows how jQuery displays an li index number in ul. Share with you for your reference. The specific analysis is as follows:

This code applies not only to element index number look-ups for ul and li, but also to other element index number look-ups with containment relationships, in a very clever way

$("ul > li").click(function () {
    // //www.ofstack.com
　　var index = $(this).prevAll().length;
//prevAll([expr]):  Find all peer elements before the current element 
});

I hope this article has helped you with your jQuery programming.