JS "smart" 跨多个段落的文本截断

Question

我在此处设置了此文本截断设置（使用 jquery.ellipsis），如果第一段超过 40 个单词，则第一段将被截断 - 所有其他段落都将被隐藏。

但是如何让它更聪明，即。遍历多个段落，直到字数达到40，然后截断当前段落的剩余部分¹，并隐藏后面的所有？

¹ visible: <the part of the word count that applies to that paragraph>

$.truncate = function (container, words) {
    var first = container.find('p').first();

    if (container.text().split(' ').length >= words) {
        if (first.text().split(' ').length >= words) {

            first.ellipsis({
                visible: words,
                more: '... <a href="#">read more</a>',
                moreClass: 'unhide',
                atFront: false
            });
        } else {

            first.append(' <span class="unhide">...<a href="#">read more</a></span>');
        }
    }

    container.find('.unhide').on('click', function () {
        container.find('p').not(':first').show();

        $(this).remove();
    });
}

$('.article').each(function () {
    $.truncate($(this), 40);

    $(this).find('p').not(':first').hide();
});

.article, .article_nojs {
    background: grey;
    margin-bottom: 20px;
}
a {
    color: blue;
    text-decoration: underline;
    cursor: pointer;
}

<script src="https://rawgit.com/bebraw/jquery.ellipsis/master/dist/jquery.ellipsis.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h1>Current result</h1>
<p>40 word truncation not applied as first paragraph is truncated as is</p>
<div class="article">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</div>

<h1>Desired result</h1>
<p>40 word truncation across multiple paragraphs</p>
<div class="article_nojs">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit</p>
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam <span class="unhide">...<a href="#">read more</a></span></p>
</div>

Answer 1

这应该会给您思路。但是，您需要注意该示例是幼稚的，并且不会正确处理包含标记的段落，因为省略号似乎将其删除。

我会让您将代码重构为合适的插件 ;)

var maxWords = 10,
    totalConsumedWordCount = 0,
    $paragraphs = $('p');

$paragraphs.each(function() {

  var $this = $(this),
      words = $this.text().split(' '),
      wordsLen = words.length,
      totalWordCount = totalConsumedWordCount + words.length;

  if (totalWordCount > maxWords) {
    $this.ellipsis({
      visible: Math.abs(totalConsumedWordCount - maxWords),
      more: '... <a href="#">read more</a>',
      moreClass: 'read-more',
      atFront: false
    });

    $this.nextAll('p').hide();

    return false;
  }

  totalConsumedWordCount = totalWordCount;

});

$(document).on('click', '.read-more', function() {
  $paragraphs.show();
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://rawgit.com/bebraw/jquery.ellipsis/master/dist/jquery.ellipsis.min.js"></script>

<p>Lorem ipsum dolor sit amet, consectetur <b>adipiscing elit</b>.</p>

<p>Praesent <i>porttitor</i> orci ipsum, ut imperdiet eros eleifend eu.</p>

<p>Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Morbi fermentum massa et turpis lacinia dapibus.</p>

JS "smart" 跨多个段落的文本截断

JS "smart" text truncation across multiple paragraphs

javascript

jquery

truncate

truncation