是否有一个解决方案，添加省略号内的最后一行与流体高度(20%)div ?
我在CSS中找到了-webkit-线夹函数，但在我的情况下，行号将取决于窗口大小。
p {
width:100%;
height:20%;
background:red;
position:absolute;
}
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla sed dui felis. Vivamus vitae pharetra nisl, eget fringilla elit. Ut nec est sapien. Aliquam dignissim velit sed nunc imperdiet cursus. Proin arcu diam, tempus ac vehicula a, dictum quis nibh. Maecenas vitae quam ac mi venenatis vulputate. Suspendisse fermentum suscipit eros, ac ultricies leo sagittis quis. Nunc sollicitudin lorem eget eros eleifend facilisis. Quisque bibendum sem at bibendum suscipit. Nam id tellus mi. Mauris vestibulum, eros ac ultrices lacinia, justo est faucibus ipsum, sed sollicitudin sapien odio sed est. In massa ipsum, bibendum quis lorem et, volutpat ultricies nisi. Maecenas scelerisque sodales ipsum a hendreritLorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla sed dui felis. Vivamus vitae pharetra nisl, eget fringilla elit. Ut nec est sapien. Aliquam dignissim velit sed nunc imperdiet cursus. Proin arcu diam, tempus ac vehicula a, dictum quis nibh. Maecenas vitae quam ac mi venenatis vulputate. Suspendisse fermentum suscipit eros, ac ultricies leo sagittis quis. Nunc sollicitudin lorem eget eros eleifend facilisis. Quisque bibendum sem at bibendum suscipit. Nam id tellus mi. Mauris vestibulum, eros ac ultrices lacinia, justo est faucibus ipsum, sed sollicitudin sapien odio sed est. In massa ipsum, bibendum quis lorem et, volutpat ultricies nisi. Maecenas scelerisque sodales ipsum a hendrerit.</p>
我有这个JSFiddle来说明这个问题。
https://jsfiddle.net/96knodm6/
我只是在这个概念上玩了一下。基本上，如果你可以从你的最后一个字符中删除一个像素，这里是一个纯css和html的解决方案:
其工作方式是将一个div绝对定位在视口的可视区域之下。我们希望随着内容的增长，div向上偏移到可见区域。如果内容增长太多，我们的div将偏移过高，所以我们的内容可以增长的高度的上限。
HTML:
<div class="text-container">
<span class="text-content">
PUT YOUR TEXT HERE
<div class="ellipsis">...</div> // You could even make this a pseudo-element
</span>
</div>
CSS:
.text-container {
position: relative;
display: block;
color: #838485;
width: 24em;
height: calc(2em + 5px); // This is the max height you want to show of the text. A little extra space is for characters that extend below the line like 'j'
overflow: hidden;
white-space: normal;
}
.text-content {
word-break: break-all;
position: relative;
display: block;
max-height: 3em; // This prevents the ellipsis element from being offset too much. It should be 1 line height greater than the viewport
}
.ellipsis {
position: absolute;
right: 0;
top: calc(4em + 2px - 100%); // Offset grows inversely with content height. Initially extends below the viewport, as content grows it offsets up, and reaches a maximum due to max-height of the content
text-align: left;
background: white;
}
我已经在Chrome、FF、Safari和IE 11上进行了测试。
你可以在这里查看:http://codepen.io/puopg/pen/vKWJwK
你甚至可以用一些CSS魔术来缓解字符的突然切断。
编辑:我猜这强加的一件事是word-break: break-all，否则内容不会扩展到视口的最末端。：(
请检查这个css多行文本的省略
body {
margin: 0;
padding: 50px;
}
/* mixin for multiline */
.block-with-text {
overflow: hidden;
position: relative;
line-height: 1.2em;
max-height: 6em;
text-align: justify;
margin-right: -1em;
padding-right: 1em;
}
.block-with-text:before {
content: '...';
position: absolute;
right: 0;
bottom: 0;
}
.block-with-text:after {
content: '';
position: absolute;
right: 0;
width: 1em;
height: 1em;
margin-top: 0.2em;
background: white;
}
<p class="block-with-text">The Hitch Hiker's Guide to the Galaxy has a few things to say on the subject of towels. A towel, it says, is about the most massivelyuseful thing an interstellar hitch hiker can have. Partly it has great practical value - you can wrap it around you for warmth as you bound across the cold moons of Jaglan Beta; you can lie on it on the brilliant marble-sanded beaches of Santraginus V, inhaling the heady sea vapours; you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon; use it to sail a mini raft down the slow heavy river Moth; wet it for use in hand-to-hand-combat; wrap it round your head to ward off noxious fumes or to avoid the gaze of the Ravenous Bugblatter Beast of Traal (a mindboggingly stupid animal, it assumes that if you can't see it, it can't see you - daft as a bush, but very ravenous); you can wave your towel in emergencies as a distress signal, and of course dry yourself off with it if it still seems to be clean enough. More importantly, a towel has immense psychological value. For some reason, if a strag (strag: non-hitch hiker) discovers that a hitch hiker has his towel with him, he will automatically assume that he is also in possession of a toothbrush, face flannel, soap, tin of biscuits, flask, compass, map, ball of string, gnat spray, wet weather gear, space suit etc., etc. Furthermore, the strag will then happily lend the hitch hiker any of these or a dozen other items that the hitch hiker might accidentally have "lost". What the strag will think is that any man who can hitch the length and breadth of the galaxy, rough it, slum it, struggle against terrible odds, win through, and still knows where his towel is is clearly a man to be reckoned with.</p>
