jQuery's method of displaying a certain li index number in ul_jquery

The example in this article describes how jQuery displays a certain li index number in ul. Share it with everyone for your reference. The specific analysis is as follows:

This code is not only suitable for searching the element index numbers of ul and li, but also for searching the index numbers of other elements with inclusion relationships. The method is very clever

$("ul > li").click(function () {
    // http://www.jb51.net
　　var index = $(this).prevAll().length;
//prevAll([expr]): 查找当前元素之前所有的同辈元素
});

I hope this article will be helpful to everyone’s jQuery programming.