垂直滚动条显示

我想知道它是如何可能永久显示一个 div 的垂直条(灰色的，如果没有滚动)类似于我们的常规条。基本上，我试图把整个网站放在一个 div (如 gmail/facebook) ，所以如果页面不够长，整个页面移动，因为缺乏垂直滚动条。

我需要一个解决这个问题的办法。我尝试了溢出-y: 滚动。但它似乎根本不起作用。

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小开

Have you tried overflow-y:auto ? It is not exactly what you want, as the scrollbar will appear only when needed.

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最佳答案

What browser are you testing in?

What DOCType have you set?

How exactly are you declaring your CSS?

Are you sure you haven't missed a ; before/after the overflow-y: scroll?

I've just tested the following in IE7 and Firefox and it works fine

<!-- Scroll bar present but disabled when less content -->
<div style="width: 200px; height: 100px; overflow-y: scroll;">
test
</div>


<!-- Scroll bar present and enabled when more contents -->
<div style="width: 200px; height: 100px; overflow-y: scroll;">
test<br />
test<br />
test<br />
test<br />
test<br />
test<br />
test<br />
test<br />
test<br />
test<br />
</div>

小开

Always : If you always want vertical scrollbar, use overflow-y: scroll;

jsFiddle:

<div style="overflow-y: scroll;">
......
</div>

When needed: If you only want vertical scrollbar when needed, use overflow-y: auto; (You need to specify a height in this case)

jsFiddle:

<div style="overflow-y: auto; height:150px; ">
....
</div>
小开

In reactjs...

<div className='p-4 mb-4' style=\{\{overflowY:'scroll',height:'350px'}}>
{msgx.map((m,index)=>{
return(
<Items m={m} key={index} i={index}/>
)
})}
</div>

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