js鼠标悬浮实现菜单栏

1、实现的效果图 2.html代码 < div class = "cm-classify-content clearfix" > < div class = "cm-kind clearfix" > < ul class = "tab" > < li class = "li cur" > 社交网络 < i class = "fa fa-angle-right pull-right" ></ i >

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