plugins: [
        function (hook) {
          hook.doneEach(function () {

            let max_cengji = 1; //默认展开层级深度
            // 存在子节点则添加箭头
            $('.sidebar-nav').find('li>a').each(function (i, e) {
              var el = e;
              // 需要排除自动生成的章节标题类菜单
              if (el.nextSibling && el.nextSibling.tagName == 'UL' && !$(el.nextSibling).hasClass('app-sub-sidebar')) {
                $(el).addClass('sidebar-nav-parent-li').append(
                  "<div class='ul-after'><div class='ul-after-sanjiao'></div></div>");
              }
            })

            // 初始时候展开层级
            function findChildrenLi(dom, current_cengji) {
              if (dom) {
                current_cengji++;
                $($(dom).find('li>a').each(function (i, e) {
                  var el = e;
                  if (el.nextSibling && el.nextSibling.tagName == 'UL' && !$(el.nextSibling).hasClass('app-sub-sidebar')) {
                    // 需要考虑：点击文章时，组件自动展开文章的标题作为子菜单，此时将会重新刷新菜单，但是会保留active状态，因此，需要排除这种菜单的误操作，否则将会自动收起所有
                    if (current_cengji >= max_cengji && $(el.nextSibling).find('li.active').length < 1) {
                      $(el.nextSibling).hide();
                      $(el).addClass('sidebar-nav-parent-li-shouqi');
                    }
                    findChildrenLi(el.nextSibling, current_cengji);
                  }
                }))
              } else {
                return
              }
            }

            findChildrenLi($('.sidebar-nav')[0], 0);

            // 绑定点击事件
            $('.sidebar-nav-parent-li').on('click', function (e) {
              e.stopPropagation();
              e.preventDefault();
              var el = e.target.nextSibling;
              if (el) {
                $(el).toggle();
                if ($(e.target).hasClass('sidebar-nav-parent-li-shouqi')) {
                  $(e.target).removeClass('sidebar-nav-parent-li-shouqi');
                } else {
                  $(e.target).addClass('sidebar-nav-parent-li-shouqi');
                }
              }
            });
            // end of bind
          });
          // end of hook function invoke
        }, // end of hook
      ],
      // plugins结束