如何用dotdotdot实现“更多阅读"和“更少阅读"? [英] How to implement Read More and Read Less with dotdotdot?

问题描述

使用jQuery dotdotdot 插件，我想同时拥有一个更多和 Less (减少)按钮来显示或隐藏<div>的全部内容. 更多按钮可以正常工作，但是我还没有找到将<div>返回其原始显示的方法.请注意，这不仅涉及如何使用点号来扩展截断的字符串，因为它结合了Less按钮来重新截断长字符串.

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();   
        }
    }
});

似乎已删除了<div>锚标记的click事件处理程序，单击更多按钮后，我再也无法访问该事件处理程序.

找到解决方案:

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();   
        }
    }
});

谢谢，伙计们！

解决方案

更改此内容:

$("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 a 标记，并以这种方式切换其文本:

HTML:

    <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>

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();
        }
    }
});

Using the jQuery dotdotdot plugin, I would like to have both a More and Less button to show and hide entire content of a <div> when there is a lot of text to display. The More button is working just fine, but I haven't yet figured out a way to return the <div> to it's original display. Note that this is not just about how to use dotdotdot to expand a truncated string because it incorporates the Less button re-truncate a long string.

Here is my code:

$(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();   
        }
    }
});

It seems that the click event handler for the <div>'s anchor tags is getting removed, I am never able to reach the event handler after the More button is clicked.

Solution found:

Updated code:

$(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();   
        }
    }
});

Thanks, guys!

解决方案

Change this:

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

to this:

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

UPDATED CODE:

$(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();
        }
    }
});

the second way is to use single a tag and just toggle its text this way:

HTML:

    <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>

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();
        }
    }
});

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