在段落中添加多个“Read More”链接（readmore.js）

I am using readmore.js and I would like to expand my paragraph twice.

我正在使用readmore.js，我想扩展我的段落两次。

For now I am using one expand link with a value of 'More information' that shows all the text when clicked.

目前我正在使用一个展开链接，其值为“更多信息”，显示点击时的所有文字。

There is another link in the bottom with a value of 'Less information' that hides the text when clicked:

底部还有另一个链接，其中包含“Less information”值，用于在单击时隐藏文本：

This is some text and continues for ages...
<a href="#">More information</a>

This is some text and continues for ages...
but is not as long as you think.
<a href="#">Less information</a>

I would like to add another expand link called 'Even more information'. In this situation 'More information' would only show a part of the text while 'Even more information' would show the complete text. This would look something like this:

我想添加另一个名为“更多信息”的扩展链接。在这种情况下，“更多信息”仅显示文本的一部分，而“更多信息”则显示完整文本。这看起来像这样：

This is some text and continues for ages...
<a href="#">More information</a>

This is some text and continues for ages...
and it goes on and on and on...
<a href="#">Even more information</a>

This is some text and continues for ages...
and it goes on and on and on...
but not as long as you think.
<a href="#">Less information</a>

This snippet shows my current situation:

这个片段显示了我目前的情况：

$('.example').readmore({
  collapsedHeight: 300,
  speed: 500,
  embedCSS: false,
  moreLink: '<a href="#">More information</a>',
  lessLink: '<a href="#">Less information</a>',
  beforeToggle: function(trigger, element, expanded) {
    if (expanded === false) {
      element.addClass('remove-after');
    } else {
      element.removeClass('remove-after');
    }
  }
});

.example+[data-readmore-toggle],
.example[data-readmore] {
  display: block;
}

.example[data-readmore]::after {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 1) 85%);
  bottom: 0;
  content: '';
  display: inline-block;
  height: 250px;
  position: absolute;
  right: 0;
  width: 100%;
}

.remove-after::after {
  display: none !important;
}

[data-readmore-toggle] {
  margin-left: 15px;
}

img {
  float: right;
}

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/readmore-js@2.1.0/readmore.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<div class="example col-md-12">
  <p>They say everything looks better with odd numbers of things. But sometimes I put even numbers—just to upset the critics. Don't be afraid to make these big decisions. Once you start, they sort of just make themselves. Now let's put some happy little
    clouds in here. We can always carry this a step further. There's really no end to this. Think about a cloud. Just float around and be there. We want to use a lot pressure while using no pressure at all.</p>

  <p>Look around, look at what we have. Beauty is everywhere, you only have to look to see it. That's the way I look when I get home late; black and blue. All you have to do is let your imagination go wild. We have a fantastic little sky!</p>

  <p>All kinds of happy little splashes. We don't want to set these clouds on fire. I was blessed with a very steady hand; and it comes in very handy when you're doing these little delicate things. It looks so good, I might as well not stop. We need dark
    in order to show light. I really recommend you use odorless thinner or your spouse is gonna run you right out into the yard and you'll be working by yourself.</p>

  <img src="https://dummyimage.com/200x200/2d5cc2/fff" />

  <p>Van Dyke Brown is a very nice brown, it's almost like a chocolate brown. We're trying to teach you a technique here and how to use it. This present moment is perfect simply due to the fact you're experiencing it.</p>

  <p>If what you're doing doesn't make you happy - you're doing the wrong thing. We spend so much of our life looking - but never seeing. In this world, everything can be happy. Everyone is going to see things differently - and that's the way it should be.
    And just raise cain.</p>

  <p>There's nothing wrong with having a tree as a friend. Maybe there was an old trapper that lived out here and maybe one day he went to check his beaver traps, and maybe he fell into the river and drowned. Tree trunks grow however makes them happy.</p>

  <p>Let your imagination be your guide. You could sit here for weeks with your one hair brush trying to do that - or you could do it with one stroke with an almighty brush. We wash our brush with odorless thinner. Every highlight needs it's own personal
    shadow. Don't kill all your dark areas - you need them to show the light. Working it up and down, back and forth.</p>

  <p>Don't forget to tell these special people in your life just how special they are to you. The only thing worse than yellow snow is green snow. That's why I paint - because I can create the kind of world I want - and I can make this world as happy as
    I want it. Let's build an almighty mountain. You have to make almighty decisions when you're the creator.</p>

  <p>We have a fantastic little sky! Everybody's different. Trees are different. Let them all be individuals. Just go out and talk to a tree. Make friends with it. Go out on a limb - that's where the fruit is. There are no mistakes. You can fix anything
    that happens.</p>

  <p>You have to make those little noises or it won't work. We have no limits to our world. We're only limited by our imagination. I want everbody to be happy. That's what it's all about.</p>

  <p>Nice little clouds playing around in the sky. It's a super day, so why not make a beautiful sky? We spend so much of our life looking - but never seeing. The secret to doing anything is believing that you can do it. Anything that you believe you can
    do strong enough, you can do. Anything. As long as you believe. Everything's not great in life, but we can still find beauty in it.</p>

  <p>If you've been in Alaska less than a year you're a Cheechako. You don't have to be crazy to do this but it does help. I'm going to mix up a little color. We’ll use Van Dyke Brown, Permanent Red, and a little bit of Prussian Blue. And I will hypnotize
    that just a little bit. Nothing's gonna make your husband or wife madder than coming home and having a snow-covered dinner.</p>

  <p>There it is. Don't fiddle with it all day. No worries. No cares. Just float and wait for the wind to blow you around.</p>

  <p>All you need to paint is a few tools, a little instruction, and a vision in your mind. Let's put a touch more of the magic here. Now let's put some happy little clouds in here. We'll lay all these little funky little things in there. But we're not there
    yet, so we don't need to worry about it. All you have to learn here is how to have fun.</p>
</div>

6 个解决方案

#1

I think the better way is to modify directly the readmore.js plugin. So I have add a step and a new label:

我认为更好的方法是直接修改readmore.js插件。所以我添加了一个步骤和一个新标签：

$('article').readmore({
      speed: 500,
      collapsedHeight:200,
      collapsedMoreHeight: 400, // Always bigger than collapsedHeigh. There isn't any control to that. Be careful.
      moreLink: '<a class="white-shadow" href="#">More information</a>',
      evenMoreLink: '<a class="white-shadow" href="#">Even More informations</a>', // Add new label
      lessLink: '<a href="#">Less information</a>'
 });

The biggest changes I did are these:

我做的最大改变是这些：

      var $element = $(element),
          newHeight = '',
          newLink = '',
          expanded = false,
          collapsedHeight = $element.data('collapsedHeight'),
          collapsedMoreHeight = this.options.collapsedMoreHeight; // add an Even More informations


      if ($element.data('expandedHeight') <= collapsedMoreHeight){
        //This is the normal code if the article's height is smaller than my new option

        if ($element.height() <= collapsedHeight) {
            newHeight = $element.data('expandedHeight') + 'px';
            newLink = 'lessLink';
            expanded = true;
        }
        else {
          newHeight = collapsedHeight;
          newLink = 'moreLink';
        }
      } else {

        //Here it works the new step: 'Even More informations'

        if ($element.height() <= collapsedHeight) {
            newHeight = collapsedMoreHeight;
            newLink   = 'evenMoreLink';
            expanded = false;
        } else if ($element.height() > collapsedHeight && $element.height() <= collapsedMoreHeight){
            newHeight = $element.data('expandedHeight') + 'px';
            newLink = 'lessLink';
            expanded = true;
        }
        else {
            newHeight = collapsedHeight;
            newLink = 'moreLink';
        }
      }

// This is the new Readmore.js file. Save this in external file.

/*!
 * @preserve
 *
 * Readmore.js jQuery plugin
 * Author: @jed_foster
 * Project home: http://jedfoster.github.io/Readmore.js
 * Licensed under the MIT license
 *
 * Debounce function from http://davidwalsh.name/javascript-debounce-function
 */

/* global jQuery */

(function(factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD
    define(['jquery'], factory);
  } else if (typeof exports === 'object') {
    // CommonJS
    module.exports = factory(require('jquery'));
  } else {
    // Browser globals
    factory(jQuery);
  }
}(function($) {
  'use strict';

  var readmore = 'readmore',
      defaults = {
        speed: 100,
        collapsedHeight: 50,
        collapsedMoreHeight: 150, // add an Even More informations Height
        heightMargin: 16,
        moreLink:     '<a href="#">More informations</a>',
        evenMoreLink: '<a href="#">Even more informations</a>', // add new label
        lessLink:     '<a href="#">Close</a>',
        embedCSS: true,
        blockCSS: 'display: block; width: 100%;',
        startOpen: false,

        // callbacks
        blockProcessed: function() {},
        beforeToggle:   function() {},
        afterToggle:    function() {}
      },
      cssEmbedded = {},
      uniqueIdCounter = 0;

  function debounce(func, wait, immediate) {
    var timeout;

    return function() {
      var context = this, args = arguments;
      var later = function() {
        timeout = null;
        if (! immediate) {
          func.apply(context, args);
        }
      };
      var callNow = immediate && !timeout;

      clearTimeout(timeout);
      timeout = setTimeout(later, wait);

      if (callNow) {
        func.apply(context, args);
      }
    };
  }

  function uniqueId(prefix) {
    var id = ++uniqueIdCounter;

    return String(prefix == null ? 'rmjs-' : prefix) + id;
  }

  function setBoxHeights(element) {
    var el = element.clone().css({
          height: 'auto',
          width: element.width(),
          maxHeight: 'none',
          overflow: 'hidden'
        }).insertAfter(element),
        expandedHeight = el.outerHeight(),
        cssMaxHeight = parseInt(el.css({maxHeight: ''}).css('max-height').replace(/[^-\d\.]/g, ''), 10),
        defaultHeight = element.data('defaultHeight');

    el.remove();

    var collapsedHeight = cssMaxHeight || element.data('collapsedHeight') || defaultHeight;

    // Store our measurements.
    element.data({
      expandedHeight: expandedHeight,
      maxHeight: cssMaxHeight,
      collapsedHeight: collapsedHeight
    })
    // and disable any `max-height` property set in CSS
    .css({
      maxHeight: 'none'
    });
  }

  var resizeBoxes = debounce(function() {
    $('[data-readmore]').each(function() {
      var current = $(this),
          isExpanded = (current.attr('aria-expanded') === 'true');

      setBoxHeights(current);

      // Resize only if expanded

      if(isExpanded){
        current.css({
          height: current.data('expandedHeight')
        });
      }

    });
  }, 100);

  function embedCSS(options) {
    if (! cssEmbedded[options.selector]) {
      var styles = ' ';

      if (options.embedCSS && options.blockCSS !== '') {
        styles += options.selector + ' + [data-readmore-toggle], ' +
          options.selector + '[data-readmore]{' +
            options.blockCSS +
          '}';
      }

      // Include the transition CSS even if embedCSS is false
      styles += options.selector + '[data-readmore]{' +
        'transition: height ' + options.speed + 'ms;' +
        'overflow: hidden;' +
      '}';

      (function(d, u) {
        var css = d.createElement('style');
        css.type = 'text/css';

        if (css.styleSheet) {
          css.styleSheet.cssText = u;
        }
        else {
          css.appendChild(d.createTextNode(u));
        }

        d.getElementsByTagName('head')[0].appendChild(css);
      }(document, styles));

      cssEmbedded[options.selector] = true;
    }
  }

  function Readmore(element, options) {
    this.element = element;

    this.options = $.extend({}, defaults, options);

    embedCSS(this.options);

    this._defaults = defaults;
    this._name = readmore;

    this.init();

    // IE8 chokes on `window.addEventListener`, so need to test for support.
    if (window.addEventListener) {
      // Need to resize boxes when the page has fully loaded.
      window.addEventListener('load', resizeBoxes);
      window.addEventListener('resize', resizeBoxes);
    }
    else {
      window.attachEvent('load', resizeBoxes);
      window.attachEvent('resize', resizeBoxes);
    }
  }


  Readmore.prototype = {
    init: function() {
      var current = $(this.element);

      current.data({
        defaultHeight: this.options.collapsedHeight,
        heightMargin: this.options.heightMargin
      });

      setBoxHeights(current);

      var collapsedHeight = current.data('collapsedHeight'),
          heightMargin = current.data('heightMargin');

      if (current.outerHeight(true) <= collapsedHeight + heightMargin) {
        // The block is shorter than the limit, so there's no need to truncate it.
        if (this.options.blockProcessed && typeof this.options.blockProcessed === 'function') {
          this.options.blockProcessed(current, false);
        }
        return true;
      }
      else {
        var id = current.attr('id') || uniqueId(),
            useLink = this.options.startOpen ? this.options.lessLink : this.options.moreLink;

        current.attr({
          'data-readmore': '',
          'aria-expanded': this.options.startOpen,
          'id': id
        });

        current.after($(useLink)
          .on('click', (function(_this) {
            return function(event) {
              _this.toggle(this, current[0], event);
            };
          })(this))
          .attr({
            'data-readmore-toggle': id,
            'aria-controls': id
          }));

        if (! this.options.startOpen) {
          current.css({
            height: collapsedHeight
          });
        }

        if (this.options.blockProcessed && typeof this.options.blockProcessed === 'function') {
          this.options.blockProcessed(current, true);
        }
      }
    },

    toggle: function(trigger, element, event) {
      if (event) {
        event.preventDefault();
      }

      if (! trigger) {
        trigger = $('[aria-controls="' + this.element.id + '"]')[0];
      }

      if (! element) {
        element = this.element;
      }

      /////////////////////////
      // I changed this part //
      /////////////////////////

      var $element = $(element),
          newHeight = '',
          newLink = '',
          expanded = false,
          collapsedHeight = $element.data('collapsedHeight'),
          collapsedMoreHeight = this.options.collapsedMoreHeight; // add an Even More informations

      
      if ($element.data('expandedHeight') <= collapsedMoreHeight){
        //This is the normal code if the article's height is smaller than my new option

        if ($element.height() <= collapsedHeight) {
            newHeight = $element.data('expandedHeight') + 'px';
            newLink = 'lessLink';
            expanded = true;
        }
        else {
          newHeight = collapsedHeight;
          newLink = 'moreLink';
        }
      } else {

        //Here it works the new step: 'Even More informations'

        if ($element.height() <= collapsedHeight) {
            newHeight = collapsedMoreHeight;
            newLink   = 'evenMoreLink';
            expanded = false;
        } else if ($element.height() > collapsedHeight && $element.height() <= collapsedMoreHeight){
            newHeight = $element.data('expandedHeight') + 'px';
            newLink = 'lessLink';
            expanded = true;
        }
        else {
            newHeight = collapsedHeight;
            newLink = 'moreLink';
        }
      }

      ////////////////
      // End change //
      ////////////////


      // Fire beforeToggle callback
      // Since we determined the new "expanded" state above we're now out of sync
      // with our true current state, so we need to flip the value of `expanded`
      if (this.options.beforeToggle && typeof this.options.beforeToggle === 'function') {
        this.options.beforeToggle(trigger, $element, ! expanded);
      }

      $element.css({'height': newHeight});

      // Fire afterToggle callback
      $element.on('transitionend', (function(_this) {
        return function() {
          if (_this.options.afterToggle && typeof _this.options.afterToggle === 'function') {
            _this.options.afterToggle(trigger, $element, expanded);
          }

          $(this).attr({
            'aria-expanded': expanded
          }).off('transitionend');
        }
      })(this));

      $(trigger).replaceWith($(this.options[newLink])
        .on('click', (function(_this) {
            return function(event) {
              _this.toggle(this, element, event);
            };
          })(this))
        .attr({
          'data-readmore-toggle': $element.attr('id'),
          'aria-controls': $element.attr('id')
        }));
    },

    destroy: function() {
      $(this.element).each(function() {
        var current = $(this);

        current.attr({
          'data-readmore': null,
          'aria-expanded': null
        })
          .css({
            maxHeight: '',
            height: ''
          })
          .next('[data-readmore-toggle]')
          .remove();

        current.removeData();
      });
    }
  };


  $.fn.readmore = function(options) {
    var args = arguments,
        selector = this.selector;

    options = options || {};

    if (typeof options === 'object') {
      return this.each(function() {
        if ($.data(this, 'plugin_' + readmore)) {
          var instance = $.data(this, 'plugin_' + readmore);
          instance.destroy.apply(instance);
        }

        options.selector = selector;

        $.data(this, 'plugin_' + readmore, new Readmore(this, options));
      });
    }
    else if (typeof options === 'string' && options[0] !== '_' && options !== 'init') {
      return this.each(function () {
        var instance = $.data(this, 'plugin_' + readmore);
        if (instance instanceof Readmore && typeof instance[options] === 'function') {
          instance[options].apply(instance, Array.prototype.slice.call(args, 1));
        }
      });
    }
  };

}));




// Init plugin


    $('article').readmore({
  speed: 500,
  collapsedHeight:200,
  collapsedMoreHeight: 400, // This is your new second height. Always bigger than collapsedHeigh. There isn't any control to that. Be careful.
  moreLink: '<a class="white-shadow" href="#">More information</a>',
  evenMoreLink: '<a class="white-shadow" href="#">Even More informations</a>', // Add new label
  lessLink: '<a href="#">Less information</a>'
});

 body { font: 16px/1.5 "Helvetica Neue", Arial, Helvetica, sans-serif; color: #444; }
    code { color: #777; font-family: "Source Code Pro", "Menlo", "Courier New", monospace;}
    a { color: #178DB1; }
    .container { margin: 0 auto; max-width: 960px; }
    #info + .readmore-js-toggle { padding-bottom: 1.5em; border-bottom: 1px solid #999; font-weight: bold;}
.white-shadow{
      position:relative;
    }

    .white-shadow:after{
      background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 1) 85%);
      bottom: 100%;
      content: '';
      display: inline-block;
      height: 150px;
      position: absolute;
      right: 0;
      width: 100%;
    }


    #demo { padding: 0 10%; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
  <div class="container">
 <section id="demo">

      <article>
        <h2>Artisanal Narwahls</h2>

        <p>From this distant vantage point, the Earth might not seem of any particular interest. But for us, it's different. Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there – on a mote of dust suspended in a sunbeam.</p>


        <p>Space, the final frontier. These are the voyages of the starship Enterprise. Its five year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before!</p>
      </article>

      <article>
        <h2>Portland Leggings</h2>

        <p>Here's how it is: Earth got used up, so we terraformed a whole new galaxy of Earths, some rich and flush with the new technologies, some not so much. Central Planets, them was formed the Alliance</p>

        <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut odio neque, dapibus a tincidunt sed, molestie in diam. Quisque quis vulputate tellus. Nulla nisl mi, rhoncus et magna cursus, euismod vehicula erat. Integer fringilla urna orci, at tempor nisi suscipit ut. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Donec non laoreet ex. Cras et purus augue. Donec a urna et leo malesuada laoreet. Duis tortor massa, fermentum et porta id, pharetra suscipit lorem. Donec molestie nunc nisi, sed faucibus turpis facilisis eget. Morbi eros mauris, fringilla in est a, vehicula tempus felis. Nullam sodales tincidunt turpis sed dapibus.</p>

        <p> Proin efficitur, leo ac sagittis faucibus, elit purus consectetur dolor, et scelerisque orci neque a orci. Nullam ut congue libero, in ornare mi. Quisque mattis porttitor nulla non fermentum. Suspendisse euismod facilisis magna, eget interdum leo semper sed. Nullam pretium, nisl sit amet auctor rhoncus, velit ipsum ullamcorper turpis, nec feugiat mauris diam ac lorem. Cras hendrerit non eros id ultricies. Aenean sed felis purus. Sed commodo, enim sed aliquet egestas, nisl odio porta ante, ac euismod justo turpis in mauris. Ut lobortis augue ut ex scelerisque, ut lacinia libero sollicitudin. Pellentesque vestibulum ac tellus sit amet commodo. Phasellus eu nunc nibh. In porta metus sed pharetra aliquet. Etiam eu magna id erat accumsan pellentesque pulvinar eget erat.</p>

        <p> Etiam vitae aliquam nisi. Aliquam vel suscipit felis. Donec non dapibus odio. Vivamus tincidunt mauris in tortor fermentum, a laoreet sem semper. Sed luctus vitae turpis vitae vulputate. Integer a libero orci. Morbi eu porttitor nisi, facilisis consectetur velit. Suspendisse sed facilisis velit. Proin rutrum ligula a purus mattis ullamcorper. Quisque sit amet aliquam enim. Etiam eleifend nibh velit, sit amet pulvinar est pulvinar eget. Fusce egestas ornare tellus sagittis pulvinar. Nulla aliquam magna id sem consectetur tristique. Nullam auctor vestibulum ex eget laoreet. Quisque interdum quam in nisi rhoncus rutrum. </p>
        
      </article>

      <article>
        <h2>This section is shorter than the Readmore minimum</h2>

        <p>Space, the final frontier. These are the voyages of the starship Enterprise. Its five year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before!</p>
      </article>

      <article>
        <h2>Portland Leggings</h2>

        <p>Here's how it is: Earth got used up, so we terraformed a whole new galaxy of Earths, some rich and flush with the new technologies, some not so much. Central Planets, them was formed the Alliance</p>

        <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut odio neque, dapibus a tincidunt sed, molestie in diam. Quisque quis vulputate tellus. Nulla nisl mi, rhoncus et magna cursus, euismod vehicula erat. Integer fringilla urna orci, at tempor nisi suscipit ut. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Donec non laoreet ex. Cras et purus augue. Donec a urna et leo malesuada laoreet. Duis tortor massa, fermentum et porta id, pharetra suscipit lorem. Donec molestie nunc nisi, sed faucibus turpis facilisis eget. Morbi eros mauris, fringilla in est a, vehicula tempus felis. Nullam sodales tincidunt turpis sed dapibus.</p>

        <p> Proin efficitur, leo ac sagittis faucibus, elit purus consectetur dolor, et scelerisque orci neque a orci. Nullam ut congue libero, in ornare mi. Quisque mattis porttitor nulla non fermentum. Suspendisse euismod facilisis magna, eget interdum leo semper sed. Nullam pretium, nisl sit amet auctor rhoncus, velit ipsum ullamcorper turpis, nec feugiat mauris diam ac lorem. Cras hendrerit non eros id ultricies. Aenean sed felis purus. Sed commodo, enim sed aliquet egestas, nisl odio porta ante, ac euismod justo turpis in mauris. Ut lobortis augue ut ex scelerisque, ut lacinia libero sollicitudin. Pellentesque vestibulum ac tellus sit amet commodo. Phasellus eu nunc nibh. In porta metus sed pharetra aliquet. Etiam eu magna id erat accumsan pellentesque pulvinar eget erat.</p>

        <p> Etiam vitae aliquam nisi. Aliquam vel suscipit felis. Donec non dapibus odio. Vivamus tincidunt mauris in tortor fermentum, a laoreet sem semper. Sed luctus vitae turpis vitae vulputate. Integer a libero orci. Morbi eu porttitor nisi, facilisis consectetur velit. Suspendisse sed facilisis velit. Proin rutrum ligula a purus mattis ullamcorper. Quisque sit amet aliquam enim. Etiam eleifend nibh velit, sit amet pulvinar est pulvinar eget. Fusce egestas ornare tellus sagittis pulvinar. Nulla aliquam magna id sem consectetur tristique. Nullam auctor vestibulum ex eget laoreet. Quisque interdum quam in nisi rhoncus rutrum. </p>

        <p> Proin efficitur, leo ac sagittis faucibus, elit purus consectetur dolor, et scelerisque orci neque a orci. Nullam ut congue libero, in ornare mi. Quisque mattis porttitor nulla non fermentum. Suspendisse euismod facilisis magna, eget interdum leo semper sed. Nullam pretium, nisl sit amet auctor rhoncus, velit ipsum ullamcorper turpis, nec feugiat mauris diam ac lorem. Cras hendrerit non eros id ultricies. Aenean sed felis purus. Sed commodo, enim sed aliquet egestas, nisl odio porta ante, ac euismod justo turpis in mauris. Ut lobortis augue ut ex scelerisque, ut lacinia libero sollicitudin. Pellentesque vestibulum ac tellus sit amet commodo. Phasellus eu nunc nibh. In porta metus sed pharetra aliquet. Etiam eu magna id erat accumsan pellentesque pulvinar eget erat.</p>

        <p> Etiam vitae aliquam nisi. Aliquam vel suscipit felis. Donec non dapibus odio. Vivamus tincidunt mauris in tortor fermentum, a laoreet sem semper. Sed luctus vitae turpis vitae vulputate. Integer a libero orci. Morbi eu porttitor nisi, facilisis consectetur velit. Suspendisse sed facilisis velit. Proin rutrum ligula a purus mattis ullamcorper. Quisque sit amet aliquam enim. Etiam eleifend nibh velit, sit amet pulvinar est pulvinar eget. Fusce egestas ornare tellus sagittis pulvinar. Nulla aliquam magna id sem consectetur tristique. Nullam auctor vestibulum ex eget laoreet. Quisque interdum quam in nisi rhoncus rutrum. </p>
        
      </article>
    </section>
  </div>

EDIT 1: I added a white gradient to buttons to make it similar to your example. I forgot it, sorry.

编辑1：我在按钮上添加了一个白色渐变，使其与您的示例类似。我忘记了，抱歉。

#2

Add this to your <head> tag:

将其添加到标记：

<script type="text/javascript">
function moreInformation(){
    document.getElementById("more-information").style.display = "block";                    
}
function evenMoreInformation(){
    document.getElementById("even-more-information").style.display = "block";                   
}
function lessInformation(){
    document.getElementById("more-information").style.display = "none";                 
    document.getElementById("even-more-information").style.display = "none";                    
}
</script>

And add this to <body> tag:

并将其添加到标记：

This is some text and continues for ages...
<a onClick="moreInformation()" style="text-decoration:underline;cursor:pointer;">More information</a><br>
<br>
<div id="more-information" style="display:none">
This is some text and continues for ages...<br>
and it goes on and on and on...<br>
<a onClick="evenMoreInformation()" style="text-decoration:underline;cursor:pointer;">Even more information</a>
</div>
<br>
<div id="even-more-information" style="display:none">
This is some text and continues for ages...<br>
and it goes on and on and on...<br>
but not as long as you think.<br>
<a onClick="lessInformation()" style="text-decoration:underline;cursor:pointer;">Less information</a>
</div>

I hope understand you...

我希望了解你......

#3

Create a function having arguments for collapsedHeight, moreLinkText, lessLinkText and other necessary configs;

创建一个具有collapsedHeight，moreLinkText，lessLinkText和其他必要配置参数的函数;
```
function invokeReadMore(collapsedHeight, moreTxt, lessTxt, ...) {
    //and make your call to $('.example').readMore 
    //with all the args received
}
```
Initially call that with your initial requirements (eg, 300, More Information")

最初根据您的初始要求调用（例如，300，更多信息）
Now, just like beforeToggle add a function for afterToggle (if it was a targeting expand) and call the function invokeReadMore from there with new requirements (eg 350, "Even More", "Less..") also you can maintain some flag that you are in next "Even More" view

现在，就像beforeToggle为afterToggle添加一个函数（如果它是一个目标展开）并从那里调用函数invokeReadMore有新的要求（例如350，“Even More”，“Less ..”）你也可以保留一些标志你在下一个“更多”视图中
Now, if your flag says that you are in "even more" then in afterToggle (if it was a targeting collapse) collapsed then, call the function invokeReadMore again with your initial parameters

现在，如果你的标志表示你处于“更多”状态，那么在afterToggle（如果它是一个目标崩溃）崩溃之后，再次使用你的初始参数调用函数invokeReadMore

Here (I just edited JS of your snippet) is a working example

这里（我刚刚编辑了你的代码片段的JS）是一个有效的例子

var isExpandMode = false;
 function invokeReadMore(collapsedHeight, speed, moreLinkTxt, lessLinkTxt) {
   $('.example').readmore({
    collapsedHeight: collapsedHeight,
    speed: speed,
    embedCSS: false,
    moreLink: '<a href="#">'+ moreLinkTxt +'</a>',
    lessLink: '<a href="#">'+ lessLinkTxt +'</a>',
    beforeToggle: function(trigger, element, expanded) {
      if (expanded === false) {
        element.addClass('remove-after');
      } else {
       
        element.removeClass('remove-after');
      }
    },
    afterToggle: function(trigger, element, expanded) { 
      if (expanded === false) {
        if(isExpandMode===true) {
          invokeReadMore(200, 1, 'More Information', 'Less Information')
          isExpandMode = false;
        }
      } else {
       if(isExpandMode===false) {
          invokeReadMore(300, 500, 'Even More Information', 'Less Information')
          isExpandMode = true;
        }
      }
    }
  });
 
 }
 
 invokeReadMore(200, 1, 'More Information', 'Less Information');

.example+[data-readmore-toggle],
.example[data-readmore] {
  display: block;
}

.example[data-readmore]::after {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 1) 85%);
  bottom: 0;
  content: '';
  display: inline-block;
  height: 250px;
  position: absolute;
  right: 0;
  width: 100%;
}

.remove-after::after {
  display: none !important;
}

[data-readmore-toggle] {
  margin-left: 15px;
}

img {
  float: right;
}

<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/readmore-js@2.1.0/readmore.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<div class="example col-md-12">
  <p>They say everything looks better with odd numbers of things. But sometimes I put even numbers—just to upset the critics. Don't be afraid to make these big decisions. Once you start, they sort of just make themselves. Now let's put some happy little
    clouds in here. We can always carry this a step further. There's really no end to this. Think about a cloud. Just float around and be there. We want to use a lot pressure while using no pressure at all.</p>

  <p>Look around, look at what we have. Beauty is everywhere, you only have to look to see it. That's the way I look when I get home late; black and blue. All you have to do is let your imagination go wild. We have a fantastic little sky!</p>

  <p>All kinds of happy little splashes. We don't want to set these clouds on fire. I was blessed with a very steady hand; and it comes in very handy when you're doing these little delicate things. It looks so good, I might as well not stop. We need dark
    in order to show light. I really recommend you use odorless thinner or your spouse is gonna run you right out into the yard and you'll be working by yourself.</p>

  <img src="https://dummyimage.com/200x200/2d5cc2/fff" />

  <p>Van Dyke Brown is a very nice brown, it's almost like a chocolate brown. We're trying to teach you a technique here and how to use it. This present moment is perfect simply due to the fact you're experiencing it.</p>

  <p>If what you're doing doesn't make you happy - you're doing the wrong thing. We spend so much of our life looking - but never seeing. In this world, everything can be happy. Everyone is going to see things differently - and that's the way it should be.
    And just raise cain.</p>

  <p>There's nothing wrong with having a tree as a friend. Maybe there was an old trapper that lived out here and maybe one day he went to check his beaver traps, and maybe he fell into the river and drowned. Tree trunks grow however makes them happy.</p>

  <p>Let your imagination be your guide. You could sit here for weeks with your one hair brush trying to do that - or you could do it with one stroke with an almighty brush. We wash our brush with odorless thinner. Every highlight needs it's own personal
    shadow. Don't kill all your dark areas - you need them to show the light. Working it up and down, back and forth.</p>

  <p>Don't forget to tell these special people in your life just how special they are to you. The only thing worse than yellow snow is green snow. That's why I paint - because I can create the kind of world I want - and I can make this world as happy as
    I want it. Let's build an almighty mountain. You have to make almighty decisions when you're the creator.</p>

  <p>We have a fantastic little sky! Everybody's different. Trees are different. Let them all be individuals. Just go out and talk to a tree. Make friends with it. Go out on a limb - that's where the fruit is. There are no mistakes. You can fix anything
    that happens.</p>

  <p>You have to make those little noises or it won't work. We have no limits to our world. We're only limited by our imagination. I want everbody to be happy. That's what it's all about.</p>

  <p>Nice little clouds playing around in the sky. It's a super day, so why not make a beautiful sky? We spend so much of our life looking - but never seeing. The secret to doing anything is believing that you can do it. Anything that you believe you can
    do strong enough, you can do. Anything. As long as you believe. Everything's not great in life, but we can still find beauty in it.</p>

  <p>If you've been in Alaska less than a year you're a Cheechako. You don't have to be crazy to do this but it does help. I'm going to mix up a little color. We’ll use Van Dyke Brown, Permanent Red, and a little bit of Prussian Blue. And I will hypnotize
    that just a little bit. Nothing's gonna make your husband or wife madder than coming home and having a snow-covered dinner.</p>

  <p>There it is. Don't fiddle with it all day. No worries. No cares. Just float and wait for the wind to blow you around.</p>

  <p>All you need to paint is a few tools, a little instruction, and a vision in your mind. Let's put a touch more of the magic here. Now let's put some happy little clouds in here. We'll lay all these little funky little things in there. But we're not there
    yet, so we don't need to worry about it. All you have to learn here is how to have fun.</p>
</div>

#4

Just add <br> tag at the end of texts for a blank.

只需在文本末尾添加
标记即可。

#5

Instead of using readmore.js why don't you create a custom one to make it easy to control. I've created a custom plugin for you, and it's awesome because you can use it on all of your posts on your page, without create a separate event for every function.

而不是使用readmore.js为什么不创建一个自定义的，以使其易于控制。我已经为您创建了一个自定义插件，它非常棒，因为您可以在页面上的所有帖子中使用它，而无需为每个功能创建单独的事件。

This is the complete code:

这是完整的代码：

$(document).ready(function(){
		$('div.post div.container').each(function(){
			var Hval = $(this).height();
			var Hval_P = $(this).parent().height();
			if (Hval > Hval_P) {
				$(this).parent().find('div#fade').css({'display':'block'});
				$(this).parent().find('a#more').css({'display':'block'});
			}
		});
		$('a#more').click(function(){
			var Hval = $(this).parent().find('div.container').height();
			var Hval_P = $(this).parent().height();
			if (Hval > (Hval_P+500)) {
				$(this).parent().css({'max-height':Hval_P+500});

				var offset = $(this).offset().top - 150;
				$([document.documentElement, document.body]).animate({
			        scrollTop: offset + 500
			    }, 250);

				$(this).hide();
				$(this).parent().find('a#evenmore').css({'display':'block'});
			}else{
				$(this).parent().css({'max-height':Hval-Hval_P});
				$(this).hide();
				$(this).parent().find('div#fade').css({'display':'none'});
				$(this).parent().find('a#less').css({'display':'block'});
			}
		});
		$('a#evenmore').click(function(){
			var Hval = $(this).parent().find('div.container').height();
			$(this).parent().css({'max-height':Hval});

			var offset = $(this).offset().top - 150;
			$([document.documentElement, document.body]).animate({
			    scrollTop: offset + 500
			}, 250);

			$(this).hide();
			$(this).parent().find('div#fade').css({'display':'none'});
			$(this).parent().find('a#less').css({'display':'block'});
		});
		$('a#less').click(function(){
			$(this).parent().css({'max-height':'300px'});

			var post_P = $(this).parent().offset().top;
			$([document.documentElement, document.body]).animate({
			    scrollTop: post_P
			}, 250);

			$(this).hide();
			$(this).parent().find('div#fade').css({'display':'block'});
			$(this).parent().find('a#more').css({'display':'block'});
		});
	});

.post{
		width: 500px;
		height: auto;
		max-height: 300px; /*whatever you want*/
		margin: auto;
		margin-bottom: 20px;
		padding: 5px 30px 20px 20px;
		position: relative;
		overflow: hidden;
		border: 1px solid rgba(0,0,0,.1);
		font-family: sans-serif;
		transition: all 250ms linear 0ms;
	}
	.container{
		width: 500px;
		height: auto;
		margin: auto;
		padding: 0px;
		position: relative;
		overflow: hidden;
	}
	.post div#fade{
		width: 100%;
		height: 150px;
		margin: auto;
		padding: 0px;
		position: absolute;
		bottom: 0px;
		background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 1) 85%);
		z-index: 1;
		display: none;
	}
	.post a#more{
		position: absolute;
		bottom: 10px;
		right: 20px;
		text-decoration: none;
		color: #4bbfee;
		z-index: 2;
		display: none;
	}
	.post a#less{
		position: absolute;
		bottom: 10px;
		right: 20px;
		text-decoration: none;
		color: #4bbfee;
		z-index: 2;
		display: none;
	}
	.post a#evenmore{
		position: absolute;
		bottom: 10px;
		right: 20px;
		text-decoration: none;
		color: #4bbfee;
		z-index: 2;
		display: none;
	}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

<div class="post">
	<div class="container">
		<p>Look around, look at what we have. Beauty is everywhere, you only have to look to see it. That's the way I look when I get home late; black and blue. All you have to do is let your imagination go wild. We have a fantastic little sky!</p>

		<p>All kinds of happy little splashes. We don't want to set these clouds on fire. I was blessed with a very steady hand; and it comes in very handy when you're doing these little delicate things. It looks so good, I might as well not stop. We need dark
		in order to show light. I really recommend you use odorless thinner or your spouse is gonna run you right out into the yard and you'll be working by yourself.</p>

		<img src="https://dummyimage.com/200x200/2d5cc2/fff" />

		<p>Van Dyke Brown is a very nice brown, it's almost like a chocolate brown. We're trying to teach you a technique here and how to use it. This present moment is perfect simply due to the fact you're experiencing it.</p>

		<p>If what you're doing doesn't make you happy - you're doing the wrong thing. We spend so much of our life looking - but never seeing. In this world, everything can be happy. Everyone is going to see things differently - and that's the way it should be.
		And just raise cain.</p>

		<p>There's nothing wrong with having a tree as a friend. Maybe there was an old trapper that lived out here and maybe one day he went to check his beaver traps, and maybe he fell into the river and drowned. Tree trunks grow however makes them happy.</p>

		<p>Let your imagination be your guide. You could sit here for weeks with your one hair brush trying to do that - or you could do it with one stroke with an almighty brush. We wash our brush with odorless thinner. Every highlight needs it's own personal
		shadow. Don't kill all your dark areas - you need them to show the light. Working it up and down, back and forth.</p>

		<p>Don't forget to tell these special people in your life just how special they are to you. The only thing worse than yellow snow is green snow. That's why I paint - because I can create the kind of world I want - and I can make this world as happy as
		I want it. Let's build an almighty mountain. You have to make almighty decisions when you're the creator.</p>

		<p>We have a fantastic little sky! Everybody's different. Trees are different. Let them all be individuals. Just go out and talk to a tree. Make friends with it. Go out on a limb - that's where the fruit is. There are no mistakes. You can fix anything
		that happens.</p>

		<p>You have to make those little noises or it won't work. We have no limits to our world. We're only limited by our imagination. I want everbody to be happy. That's what it's all about.</p>

	</div>
	<div id="fade"></div>

	<a href="#" id="more">More information</a>
	<a href="#" id="less">Less information</a>
	<a href="#" id="evenmore">Even more information</a>

</div>

#6

You could nest the articles inside each other like this:

您可以将文章嵌套在彼此内部，如下所示：

Big article
|
| Original content
| |
| | Small article
| | |
| | | Original content
| | | | "blah blah blah"
| | | |
| | | Read more
| | | | "more blahs"
| | | |
| | | End
| | |
| | End
| |
| Read more
| | "even more blahs"
| |
| End
|
End

Here are some key points:

以下是一些要点：

Do not show Big article "Read more" link until the small article has been expanded
在小文章扩展之前，不要显示大文章“阅读更多”链接
Do not show the Small article "Read less" link
不要显示小文章“少阅读”链接
It is best to close both articles in succession(which they might). If they don't, you can use a setTimeout() function to delay the closing of the Small article
最好连续关闭两篇文章（他们可能会）。如果他们不这样做，您可以使用setTimeout（）函数来延迟关闭Small文章

#1