📜  获取索引 vanilla js - Javascript 代码示例
📅  最后修改于: 2022-03-11 15:03:53.784000             🧑  作者: Mango
代码示例1
function index(el) {
if (!el) return -1;
var i = 0;
do {
i++;
} while (el = el.previousElementSibling);
return i;
}