聪明的地方:D

//My Huge Huge String let tooHugeToHandle = `It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).` //Trim Max Length const maxValue = 50 // The barber. const TrimMyString = (string, maxLength, start = 0) => { //Note - `start` is if I want to start after some point of the string if (string.length > maxLength) { let trimmedString = string.substr(start, maxLength) return ( trimmedString.substr( start, Math.min(trimmedString.length, trimmedString.lastIndexOf(' ')) ) + ' ...' ) } return string } console.log(TrimMyString(tooHugeToHandle, maxValue))

所有现代浏览器现在都支持一个简单的CSS解决方案，当一行文本超过可用宽度时自动添加省略号:

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

(请注意，这需要以某种方式限制元素的宽度，以便产生任何效果。)

基于https://css-tricks.com/snippets/css/truncate-string-with-ellipsis/。

应该注意的是，这种方法并不基于字符的数量进行限制。如果需要允许多行文本，它也不能工作。

我在谷歌上快速搜索了一下，发现了这个……这对你有用吗?

/**
 * Truncate a string to the given length, breaking at word boundaries and adding an elipsis
 * @param string str String to be truncated
 * @param integer limit Max length of the string
 * @return string
 */
var truncate = function (str, limit) {
    var bits, i;
    if (STR !== typeof str) {
        return '';
    }
    bits = str.split('');
    if (bits.length > limit) {
        for (i = bits.length - 1; i > -1; --i) {
            if (i > limit) {
                bits.length = i;
            }
            else if (' ' === bits[i]) {
                bits.length = i;
                break;
            }
        }
        bits.push('...');
    }
    return bits.join('');
};
// END: truncate

我总是使用cutr .js库来截断字符串并添加自定义省略号:

new Cuttr（'.container'， { 此处的选项 截断：“单词”， 长度： 8， 结尾：“...►' }); <script src=“https://unpkg.com/cuttr@1.1.1/dist/cuttr.min.js”></script> <p class=“container”>Lorem ipsum dolor sit amet， consetetur sadipscing elitr， sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat， sed diam voluptua.在vero eos et accusam et justo duo dolores et ea rebum.Stet clita kasd gubergren， no sea takimata sanctus est lorem ipsum dolor sit amet.</p>

这是迄今为止我所知道的用JS切割字符串的最简单的方法(并且没有任何依赖关系)，它也可以作为jQuery插件使用。

如果你想用css而不是JavaScript;

.textShortDesc { /*Here we have determined the max number of lines.*/
    display: block; /* or inline-block */
    -o-text-overflow: ellipsis; /* Opera < 11*/
    text-overflow: ellipsis; /* IE, Safari (WebKit), Opera >= 11, FF > 6 */
    word-wrap: break-word;
    overflow: hidden;
    max-height: 2em; /*max-height/line-height=rowCount */
    line-height: 1em;
}

Text-overflow:省略号是您需要的属性。有了这个和一个溢出:隐藏在一个特定的宽度，超过它的所有东西将在最后得到三个周期的效果……不要忘记添加空格:nowrap或文本将被放入多行。

.wrap{
  text-overflow: ellipsis
  white-space: nowrap;
  overflow: hidden;
  width:"your desired width";
}
<p class="wrap">The string to be cut</p>