@opentiny/tiny-toolkit-pro/template/tinyvue/src/components/transition/utils.ts

TinyPro Vue：开箱即用、前后端分离的 Vue 后台管理模板

export const findIdx = (el: Element) => {
  let idx = 0;
  let cur = el;
  while (cur) {
    idx += 1;
    cur = cur.previousElementSibling;
  }
  return idx;
};