单行文本截断

p {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

多行文本截断

对于固定行高的文本框,我们可以使用纯 CSS 来截断,思路是使用 float 属性,让另一个元素覆盖掉最后的地方
效果图如下
图片描述
为了方便理解,添加了背景色区分每一块

<div class="container">
    <div class="content">
        Responsive layouts in material design adapt to any possible screen size. This UI guidance includes a flexible
        grid that ensures consistency across layouts, breakpoint details about how content reflows on different screens,
        and a description of how an app can scale from small to extra-large screens.
    </div>
</div>

<style>
.container {
    height: 200px;
    width: 200px;
    background-color: beige;
    overflow: hidden;
}

.container::before {
    content: "";
    height: 100%;
    width: 1em;
    float: left;
    background-color: #adcfea;
}

.container::after {
    content: "...";
    text-align: right;
    background-color: lightblue;

    height: 1em;
    width: 2em;
    margin-left: -1em;

    float: right;
    position: relative;
    top: -1em;
    left: calc(100% - 1em);
}

.content {
    width: 100%;
    margin-left: -1em;
    float: right;
}
</style>

参考来源:

http://dev.mobify.com/blog/multiline-ellipsis-in-pure-css/

flexbox 中截断文本的问题

<div style="display:flex;">
    <div class="fc">            
        <p>blablablablablablablablabla...blablablablablablablabla</p>
    </div>
    <div class="fc">            
        <p>blablablablablablablablabla...blablablablablablablabla</p>
    </div>
</div>

<style>
    p {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
</style>

我们期望的效果是两个文本在同一行各占百分之五十,溢出的文本被 ...截断,但实际的效果是两段文字都在同一排完整的显示出来了。(Safari不会出现这种问题)

解决方案是对 .fc 设置 width(或 max-widthmin-width) 或 overflow 属性

加上

.fc {
    width: 50%;
}

或者

.fc {
    overflow: hidden;
}

之后可得到我们想要的效果

原因

According to a draft spec, the above text should not fully collapse when the flex container is resized down. Because .subtitle has a width of 100%, the min-width: auto calculation that flexbox makes says that its container should be larger than we want.

大概是 chrome、opera 以及 firefox 的默认宽度属性的问题。

参考 :
Flexbox and Truncated Text


vanisseg
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