如何使用dotdotdot实现Read More和Read less？

使用jQuery dotdotdot插件，当有大量文本需要显示时，我希望同时显示和隐藏

全部内容。 “ 更多”按钮工作得很好，但我还没有找到一种方法将

返回到它的原始显示。 请注意，这不仅仅是关于如何使用dotdotdot扩展截断的字符串，因为它包含Less按钮重新截断长字符串。

这是我的代码 ：

 $(function() { $("div.ellipsis-text").dotdotdot({ after: 'a.more', callback: dotdotdotCallback }); $("div.ellipsis-text").find("a").click(function() { if ($(this).text() == "More") { var div = $(this).closest('div.ellipsis-text'); div.trigger('destroy').find('a.more').hide(); div.css('max-height', ''); $("a.less", div).show(); } else { $(this).text("More"); $(this).closest('div.ellipsis-text').css("max-height", "50px").dotdotdot({ after: "a", callback: dotdotdotCallback }); } }); function dotdotdotCallback(isTruncated, originalContent) { if (!isTruncated) { $("a", this).remove(); } } }); 

似乎

的锚标记的click事件处理程序被删除了，在单击More按钮后我永远无法访问事件处理程序。

解决方案：

更新的代码 ：

 $(function() { $("div.ellipsis-text").dotdotdot({ after: 'a.more', callback: dotdotdotCallback }); $("div.ellipsis-text").on('click','a',function() { if ($(this).text() == "More") { var div = $(this).closest('div.ellipsis-text'); div.trigger('destroy').find('a.more').hide(); div.css('max-height', ''); $("a.less", div).show(); } else { $(this).hide(); $(this).closest('div.ellipsis-text').css("max-height", "50px").dotdotdot({ after: "a.more", callback: dotdotdotCallback }); } }); function dotdotdotCallback(isTruncated, originalContent) { if (!isTruncated) { $("a", this).remove(); } } }); 

多谢你们！

Answer 1

改变这个：

 $("div.ellipsis-text").find("a").click(function() { 

对此：

 $("div.ellipsis-text").on('click','a',function() { 

更新的代码：

 $(function () { $("div.ellipsis-text").dotdotdot({ after: 'a.more', callback: dotdotdotCallback }); $("div.ellipsis-text").on('click', 'a', function () { if ($(this).text() == "More") { var div = $(this).closest('div.ellipsis-text'); div.trigger('destroy').find('a.more').hide(); div.css('max-height', ''); $("a.less", div).show(); } else { $(this).closest('div.ellipsis-text').css("max-height", "50px").dotdotdot({ after: "a", callback: dotdotdotCallback }); } }); function dotdotdotCallback(isTruncated, originalContent) { if (!isTruncated) { $("a", this).remove(); } } }); 

第二种方法是使用单个标签，并以这种方式切换其文本：

HTML：

  
"But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?" More  

JQUERY：

 $(function () { $("div.ellipsis-text").dotdotdot({ after: 'a.more', callback: dotdotdotCallback }); $("div.ellipsis-text").on('click', 'a', function () { if ($(this).text() == "More") { var div = $(this).closest('div.ellipsis-text'); div.trigger('destroy') div.css('max-height', ''); $(this).text("Less"); } else { $(this).text("More") $(this).closest('div.ellipsis-text').css("max-height", "50px").dotdotdot({ after: "a", callback: dotdotdotCallback }); } }); function dotdotdotCallback(isTruncated, originalContent) { if (!isTruncated) { $("a", this).remove(); } } }); 

Answer 2

我参加这个派对有点晚了，但我想你可能会喜欢这个代码。

也在jsfiddle.net/fo4z05qp上

 var bindReadMore = function(){ $('.read-more').on('click', function(e) { e.preventDefault(); var parent = $(this).parent(); parent.trigger("destroy"); parent.removeClass('truncable-txt--is-truncated'); parent.addClass('truncable-txt--is-not-truncated'); bindReadLess(); // bind click on "less" }); }; var bindReadLess = function(){ $('.read-less').on('click', function(e) { e.preventDefault(); var parent = $(this).parent(); truncateIfNeeded(parent); // Re-initialize ellipsis }); }; var truncateIfNeeded = function(jqueryTag){ var $selectionToTruncate = jqueryTag || $('.truncable-txt'); $selectionToTruncate.dotdotdot({ ellipsis: '...', watch : true, wrap : 'letter', height : 20 * 3, // max number of lines after : '.read-more', callback: function( isTruncated, orgContent ) { var $currentReadMore = $(this).find('.read-more'); var $currentReadLess = $(this).find('.read-less'); if( isTruncated ){ $(this).addClass('truncable-txt--is-truncated'); } bindReadMore(); // bind click on "read more" }, }); }; $(function() { truncateIfNeeded(); // Initialize ellipsis }); 

 .trigger-js { cursor: pointer; cursor: hand; } .read-less, .read-more { display: none; } .read-more__txt, .read-less__txt { text-decoration: underline; } /* [1] downwards arrow, fileformat.info/info/unicode/char/2193/index.htm */ .read-more::after { margin-left: 4px; content: '\2193'; /* [1] */ } /* [2] upwards arrow, fileformat.info/info/unicode/char/2191/index.htm */ .read-less::after { margin-left: 4px; content: '\2191'; /* [2] */ } .truncable-txt--is-truncated .read-more, .truncable-txt--is-not-truncated .read-less { display: inline-block; } 

   
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum  more  less 
 
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum  more  less  

Answer 3

Ehsan Sajjad的答案是正确的，但是你也有一个错误，你从一个更多，更少的按钮开始，但将Less按钮重命名为More而不是隐藏它。 我修改了小提琴上的JS，现在它似乎正常工作。

 $(function() { $("div.ellipsis-text").dotdotdot({ after: 'a.more', callback: dotdotdotCallback }); $("div.ellipsis-text").on('click','a',function() { if ($(this).text() == "More") { var div = $(this).closest('div.ellipsis-text'); div.trigger('destroy').find('a.more').hide(); div.css('max-height', ''); $("a.less", div).show(); } else { $(this).hide(); $(this).closest('div.ellipsis-text').css("max-height", "50px").dotdotdot({ after: "a.more", callback: dotdotdotCallback }); } }); function dotdotdotCallback(isTruncated, originalContent) { if (!isTruncated) { $("a", this).remove(); } } });