使用jQuery dotdotdot插件，我想同时使用更多和更少按钮来显示和隐藏{{1}的整个内容当有很多文字要显示时。 更多按钮工作正常，但我还没有找到一种方法将<div>返回到原始显示器。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。
以下是my code：
<div>似乎$(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();
}
}
});
的锚标记的click事件处理程序已被删除，在更多按钮后，我无法访问事件处理程序点击。
找到解决方案：
<div>谢谢，伙计们！
答案 0 :(得分：10)
改变这个：
$("div.ellipsis-text").find("a").click(function() {
到此：
$("div.ellipsis-text").on('click','a',function() {
$(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 a 标记，并以这种方式切换文字：
<div class='ellipsis-text'>"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?"
<a class='more' href='#'>More</a>
</div>
$(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();
}
}
});
答案 1 :(得分：8)
我参加这个派对有点晚了，但我觉得你可能会喜欢这个代码。
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;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://rawgit.com/BeSite/jQuery.dotdotdot/master/src/js/jquery.dotdotdot.min.js"></script>
<p class="truncable-txt">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
<span class="read-more trigger-js"> <a class="read-more__txt">more</a></span>
<span class="read-less trigger-js"> <a class="read-less__txt">less</a></span>
</p>
<p class="truncable-txt">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
<span class="read-more trigger-js"> <a class="read-more__txt">more</a></span>
<span class="read-less trigger-js"> <a class="read-less__txt">less</a></span>
</p>
答案 2 :(得分：2)
Ehsan Sajjad的回答是正确的，但你也有一个错误，你开始时只需要一个更多的按钮，但是将Less按钮重命名为More而不是隐藏它。我在小提琴上修改了JS，现在看起来它可以正常工作。
$(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();
}
}
});