大多数网站的窗口缩小后都有横向的，为什么我随便写一个页面只有纵向的滚动条，没有横向的，要怎么弄呢？
回复讨论(解决方案)
要一拉到底才能看见滚动条，设置html{overflow-y:auto;overflow-x:auto;}也无效
根据页面中DIV的宽度，适当改变浏览器显示的宽度就能显示底部滚动条
根据页面中DIV的宽度，适当改变浏览器显示的宽度就能显示底部滚动条
不是一个DIV，而是整个HTML页面 http://www.jb51.net/web/111360.html
看看这个
希望可以帮到你
新浪微博的可能是js控制的,百度一下js滚动条事件很多的
是指body的宽度，比如
body { width: 2000px;}
根据页面中DIV的宽度，适当改变浏览器显示的宽度就能显示底部滚动条
没有横向的是因为你页面宽度不足以撑开缩小后的body !
HTML 可视内容，最外层是body控制！内容宽度超过浏览器物理宽度，就会出现滚动条！
同7楼，你的body里面的内容不足以撑开body，所以不会出现滚动条。
试试这个：
我在做练习的时候，给banner设置过min-width，然后缩小窗口就有左右的滚动条了。
大概就是跟你的内容多少有关吧。
没有横向的是因为你页面宽度不足以撑开缩小后的body !
HTML 可视内容，最外层是body控制！内容宽度超过浏览器物理宽度，就会出现滚动条！
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