carousel.html

{% assign letterstring = "a,b,c,d,e,f,g,h,i,j,k,l,m,n" %}
{% assign letters = letterstring | split: ',' %}
{% assign number = include.number | minus: 1 %}
<div class="carousel__holder">
  <div id="carousel{{ number }}" class="carousel">
    {% for item in include.images %}
    <input class="carousel__activator" type="radio" name="carousel{{ number }}" id="{{ number }}{{ letters[forloop.index0] }}" {% if forloop.first %}checked="checked"{% endif %} />
    {% endfor %}
    {% for item in include.images %}
    {% if forloop.index == forloop.length %}
    {% assign nextindex = 0 %}
    {% else %}
    {% assign nextindex = forloop.index0 | plus: 1 %}
    {% endif %}
    {% assign nextletter = letters[nextindex] %}
    {% if forloop.index0 == 0 %}
    {% assign previndex = forloop.length | minus: 1 %}
    {% else %}
    {% assign previndex = forloop.index0 | minus: 1 %}
    {% endif %}
    {% assign prevletter = letters[previndex] %}
    <div class="carousel__controls">
      <label class="carousel__control carousel__control--backward" for="{{ number }}{{ prevletter }}"></label>
      <label class="carousel__control carousel__control--forward" for="{{ number }}{{ nextletter }}"></label>
    </div>
    {% endfor %}
    <div class="carousel__track">
      <ul>
        {% for item in include.images %}
        <li class="carousel__slide" style="background-image: url('{{ item }}');"></li>
        {% endfor %}
      </ul>
    </div>
    <div class="carousel__indicators">
      {% for item in include.images %}
      <label class="carousel__indicator" for="{{ number }}{{ letters[forloop.index0] }}"></label>
      {% endfor %}
    </div>
  </div>
</div>

<style>
  .carousel__holder {width: 100%; position: relative; padding-bottom: {{ include.height }}{{ include.unit }}; margin: 1rem 0 1rem;}
  .carousel {
    height: 100%;
    width: 100%;
    overflow: hidden;
    text-align: center;
    position: absolute;
    padding: 0;
  }
  .carousel__controls,
  .carousel__activator {
    display: none;
  }
  {% for item in include.images %}
  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__track {
  -webkit-transform: translateX(-{{ forloop.index0 }}00%);
  transform: translateX(-{{ forloop.index0 }}00%);
  }
  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__slide:nth-of-type({{ forloop.index }}) {
    transition: opacity 0.5s, -webkit-transform 0.5s;
    transition: opacity 0.5s, transform 0.5s;
    transition: opacity 0.5s, transform 0.5s, -webkit-transform 0.5s;
    top: 0;
    left: 0;
    right: 0;
    opacity: 1;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__controls:nth-of-type({{ forloop.index }}) {
    display: block;
    opacity: 1;
  }
  .carousel__activator:nth-of-type({{ forloop.index }}):checked ~ .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
    opacity: 1;
  }
  {% endfor %}

  .carousel__control {
    height: 30px;
    width: 30px;
    margin-top: -15px;
    top: 50%;
    position: absolute;
    display: block;
    cursor: pointer;
    border-width: 5px 5px 0 0;
    border-style: solid;
    border-color: #fafafa;
    opacity: 0.35;
    opacity: 1;
    outline: 0;
    z-index: 3;
  }
  .carousel__control:hover {
    opacity: 1;
  }
  .carousel__control--backward {
    left: 20px;
    -webkit-transform: rotate(-135deg);
    transform: rotate(-135deg);
  }
  .carousel__control--forward {
    right: 20px;
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
  }
  .carousel__indicators {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
  }
  .carousel__indicator {
    height: 15px;
    width: 15px;
    border-radius: 100%;
    display: inline-block;
    z-index: 2;
    cursor: pointer;
    opacity: 0.35;
    margin: 0 2.5px 0 2.5px;
  }
  .carousel__indicator:hover {
    opacity: 0.75;
  }
  .carousel__track {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    padding: 0;
    margin: 0;
    transition: -webkit-transform 0.5s ease 0s;
    transition: transform 0.5s ease 0s;
    transition: transform 0.5s ease 0s, -webkit-transform 0.5s ease 0s;
  }
  .carousel__track .carousel__slide {
    display: block;
    top: 0;
    left: 0;
    right: 0;
    opacity: 1;
  }
  {% for item in include.images %}
  .carousel__track .carousel__slide:nth-of-type({{ forloop.index }}) {
  -webkit-transform: translateX({{ forloop.index0 }}00%);
  transform: translateX({{ forloop.index0 }}00%);
  }
  {% endfor %}

  .carousel--scale .carousel__slide {
    -webkit-transform: scale(0);
    transform: scale(0);
  }
  .carousel__slide {
    height: 100%;
    position: absolute;
    opacity: 0;
    overflow: hidden;
  }
  .carousel__slide .overlay {height: 100%;}
  .carousel--thumb .carousel__indicator {
    height: 30px;
    width: 30px;
  }
  .carousel__indicator {
    background-color: #fafafa;
  }
  {% for item in include.images %}
  .carousel__slide:nth-of-type({{ forloop.index }}),
  .carousel--thumb .carousel__indicators .carousel__indicator:nth-of-type({{ forloop.index }}) {
    background-size: cover;
    background-position: center;
  }
  {% endfor %}
</style>

<script>
  function isVisible(el) {
        while (el) {
            if (el === document) {
                return true;
            }

            var $style = window.getComputedStyle(el, null);

            if (!el) {
                return false;
            } else if (!$style) {
                return false;
            } else if ($style.display === 'none') {
                return false;
            } else if ($style.visibility === 'hidden') {
                return false;
            } else if (+$style.opacity === 0) {
                return false;
            } else if (($style.display === 'block' || $style.display === 'inline-block') &&
                $style.height === '0px' && $style.overflow === 'hidden') {
                return false;
            } else {
                return $style.position === 'fixed' || isVisible(el.parentNode);
            }
        }
  }
  {% if include.duration %}
  setInterval(function(){
    var j=0;
    var elements = document.querySelectorAll('#carousel{{ number}} .carousel__control--forward');
    for(i=(elements.length - 1);i>-1;i--) {
      if(isVisible(elements[i])) j=i;
    }
    elements[j].click();
  },{{ include.duration }}000);
  {% endif %}
</script>