迟回复，但一个html换行也可以，所以你可以做一个html + css唯一的解决方案。所以通常使用br元素是不好的做法，但如果你用br打断了注释，text-overflow省略号将从html文本的下一行开始。

Sass helper mixin:

对于那些使用像Sass这样的预处理器的人来说，你可以有一个mixin，它有一个可选的参数，叫做lines，默认为1，这使得它非常方便地应用一个元素的文本截断，并在你需要的时候改变行数:

@mixin text-ellipsis($lines: 1) {
    text-overflow: ellipsis;
    overflow: hidden;
    @if ($lines > 1) {
        display: -webkit-box;
        -webkit-line-clamp: $lines;
        -webkit-box-orient: vertical;
    } @else {
        white-space: nowrap;
    }
}

用法:

.some-title {
    @include text-ellipsis($lines: 2);
}

这应该在webkit浏览器中工作:

overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 3;
-webkit-box-orient: vertical;

浏览器支持

div { overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; } * { font-family: verdana; } <div> The <b><a target='_blank' href='https://developer.mozilla.org/docs/Web/CSS/-webkit-line-clamp'>-webkit-line-clamp</a></b> CSS property allows limiting of the contents of a block container to the specified number of lines. It only works in combination with the display property set to <b>-webkit-box</b> or <b>-webkit-inline-box</b> and the <b>-webkit-box-orient</b> property set to vertical. In most cases you will also want to set overflow to hidden, otherwise the contents won't be clipped but an ellipsis will still be shown after the specified number of lines. When applied to anchor elements, the truncating can happen in the middle of the text, not necessarily at the end. </div>

如果有人试图让线夹在flexbox中工作，那就有点棘手了——特别是当您使用非常长的单词进行折磨测试时。这段代码片段中唯一真正的区别是min-width: 0;在包含截断文本的伸缩项中，以及换行:断字;。向https://css-tricks.com/flexbox-truncated-text/致敬。免责声明:在写这个答案的时候，Chrome以外的浏览器支持很差。然而，从那时起，情况可能有所改善。

.flex-parent { display: flex; } .short-and-fixed { width: 30px; height: 30px; background: lightgreen; } .long-and-truncated { margin: 0 20px; flex: 1; min-width: 0;/* Important for long words! */ } .long-and-truncated span { display: inline; -webkit-line-clamp: 3; text-overflow: ellipsis; overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; word-wrap: break-word;/* Important for long words! */ } <div class="flex-parent"> <div class="flex-child short-and-fixed"> </div> <div class="flex-child long-and-truncated"> <span>asdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasdasd</span> </div> <div class="flex-child short-and-fixed"> </div> </div>

http://codepen.io/AlgeoMA/pen/JNvJdx (codeen版本)

纯css方式用省略号修饰多行文本

调整文本容器的高度， 用-webkit-line-clamp控制断线:2;

.block-ellipsis {
  display: block;
  display: -webkit-box;
  max-width: 100%;
  height: 30px;
  margin: 0 auto;
  font-size: 14px;
  line-height: 1;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

我将这些css属性用于行省略号

overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 3; 
-webkit-box-orient: vertical;

-webkit-line-clamp: 3;是在…之后的行数(3行)所示。