在web前端开发中，经常要处理的一种情况就是“文本溢出”。比较友好的处理方式是溢出的文本不显示，在末尾加上“…”。实现方式多种多样，可以直接后端程序截断，前端js截断或者CSS实现截断。下面介绍CSS截断的方法。

主要代码有三个属性组成，缺一不可：

overflow: hidden;white-space: nowrap;text-overflow: ellipsis;

下面是chrome下的效果：

注意：IE6必须指定宽度。大家可以查看效果。

另外需要指出的是，不同系统的不同浏览器（主要是IE）下，“…”会显示不同的效果（可以在不同浏览器查看）。而且对于文章类的网站，显示大量的“…”也是级差的效果，最佳的方法还是言简意赅的使用一定字数的副标题用于列表。

 

## 为什么不起作用

`text-overflow:ellipsis; ` only works when the following are true:

1. The element's width must be constrained in px (pixels). Width in % (percentage) won't work.

2. The element must have overflow:hidden and white-space:nowrap set.

The reason you're having problems here is because the width of your a element isn't constrained. You do have a width setting, but because the element is set to display:inline (i.e. the default) it is ignoring it, and nothing else is constraining its width either.

You can fix this by doing one of the following:

1. Set the element to `display:inline-block` or `display:block` (probably the former, but depends on your layout needs).

2. Set one of its container elements to display:block and give that element a fixed width or max-width. 3. Set the element to float:left or float:right (probably the former, but again, either should have the same effect as far as the ellipsis is concerned).

I'd suggest display:inline-block, since this will have the minimum colateral impact on your layout; it works very much like the display:inline that it's using currently as far as the layout is concerned, but feel free to experiment with the other points as well; I've tried to give as much info as possible to help you understand how these things interract together; a large part of understanding CSS is about understanding how various styles work together.

Hope that helps.

 

https://stackoverflow.com/questions/17779293/css-text-overflow-ellipsis-not-working