用css设置不确定宽度的div的高度等于本身宽度的2倍***************_html/css

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用css设置不确定宽度的div的高度等于本身宽度的2倍***************_html/css_WEB-ITnose

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Jun 21, 2016 am 09:46 AM

css 宽高比

例如我的页面的宽度会随浏览器的宽度改变。我的div的宽度设置是100%。div宽度就不能确定了。
但是现在要求必须设置其高度等于其宽度的2倍。用css如何实现？
听说过可以在css中写js。但是我不知道怎么写。

回复讨论(解决方案)

用js 实现呗！不一定要用css!

问题是div的宽度设置了是100%。用$("mydiv").width()获取到的宽度是100.他只是把百分号去掉之后就给我了
本来还想用$("mydiv").height($("mydiv").width()*2)的。

不是吧，其实就是100px吧。。。

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