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子元素旋转90度,如何正常的撑开父元素(高宽对应)

如题,正常撑开,而不是子元素的宽撑开了父元素的高


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http://jsrun.net/vfwKp/edit

只要你善于观察,其实是有个特例的body 是会显示滚动条的。

那么我们根据这个特性,设置dom出现滚动条,然后定时改变div的高度就可以了。


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