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layUI水平导航菜单下的横条如何控制？

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layUI水平导航菜单下的横条如何控制？

image
比方说我点击解决方案下的三个子模块，异步更新页面，如何让那个绿色的横条始终在解决方案下显示


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在选中的<li class="layui-nav-item">中添加class为layui-nav-itemed，表明已选中，同时剔除兄弟li中layui-nav-itemed class样式。
对于解决方案下拉的菜单
在dd中添加class为layui-this表明选中


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