我不确定您是否看过 ，但是ChrisCoyier出色的css-Tricks.com早已发布了指向该链接的链接，它是一个纯CSS解决方案，可以完全满足您的要求。
<div class="ellipsis">
<div>
<p>
Call me Ishmael. Some years ago – never mind how long precisely – having
little or no money in my purse, and nothing particular to interest me on
shore, I thought I would sail about a little and see the watery part of the
world. It is a way I have of driving off the spleen, and regulating the
circulation. Whenever I find myself growing grim about the mouth; whenever it
is a damp, drizzly November in my soul; whenever I find myself involuntarily
pausing before coffin warehouses, and bringing up the rear of every funeral I
meet; and especially whenever my hypos get such an upper hand of me, that it
requires a strong moral principle to prevent me from deliberately stepping
into the street, and methodically knocking people's hats off – then, I account
it high time to get to sea as soon as I can.
</p>
</div>
</div>
html,body,p {
margin: 0;
padding: 0;
font-family: sans-serif;
}
.ellipsis {
overflow: hidden;
height: 200px;
line-height: 25px;
margin: 20px;
border: 5px solid #AAA;
}
.ellipsis:before {
content: "";
float: left;
width: 5px;
height: 200px;
}
.ellipsis > *:first-child {
float: right;
width: 100%;
margin-left: -5px;
}
.ellipsis:after {
content: "\02026";
@R_463_2419@-sizing: content-@R_463_2419@;
-webkit-@R_463_2419@-sizing: content-@R_463_2419@;
-moz-@R_463_2419@-sizing: content-@R_463_2419@;
float: right;
position: relative;
top: -25px;
left: 100%;
width: 3em;
margin-left: -3em;
padding-right: 5px;
text-align: right;
background-size: 100% 100%;/* 512x1 image,gradient for IE9. Transparent at 0% -> white at 50% -> white at 100%.*/
background-image:url(data:image/png;base64,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);
background: -webkit-gradient(linear,left top,right top,
from(rgba(255,255,255,0)),to(white),color-stop(50%,white));
background: -moz-linear-gradient(to right,rgba(255,255,255,0),white 50%,white);
background: -o-linear-gradient(to right,rgba(255,255,255,0),white 50%,white);
background: -ms-linear-gradient(to right,rgba(255,255,255,0),white 50%,white);
background: linear-gradient(to right,rgba(255,255,255,0),white 50%,white);
}
当然，单纯的CSS解决方案意味着它也是一个相当复杂的解决方案，但是它可以干净利落地工作。我将认为Javascript是不可能的，因为使用Javascript更容易实现（并且可能更可降解）。
此外，还有一个完整过程的可下载zip文件（如果您想了解所有内容），还有一个SASS mixin文件，以便您可以轻松将其折叠到过程中。
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