A simple jQuery Accordion with unlimited nesting

a-simple-jquery-accordion-with-unlimited-nesting.markdown

A simple jQuery Accordion with unlimited nesting

A Pen by Christoph Niedermoser on CodePen.

License.

index.html

<ul class="accordion">
  <li>
    <a class="toggle" href="javascript:void(0);">Alarm</a>
    <ul class="inner">
      <li>
        <a href="#" class="toggle">Recipe 1</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
      
      <li>
        <a href="#" class="toggle">Recipe 2</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
    </ul>
  </li>
  
  <li>
    <a class="toggle" href="javascript:void(0);">Production</a>
    <ul class="inner">
      <li>
        <a href="#" class="toggle">Recipe 1</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
      
      <li>
        <a href="#" class="toggle">Recipe 2</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
    </ul>
  </li>
  
  <li>
    <a class="toggle" href="javascript:void(0);">Helper</a>
    <ul class="inner">
      <li>
        <a href="#" class="toggle">Recipe 1</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
      
      <li>
        <a href="#" class="toggle">Recipe 2</a>
        <div class="inner">
          <ul>
            <li>Step 1</li>
            <li>Step 2</li>
          </ul>
        </div>
      </li>
    </ul>
  </li>
  
  <li>
    
    <ul class="inner">
      <li>
        <a href="#" class="toggle">Technically any number of nested elements</a>
        <ul class="inner">
          <li>
            <a href="#" class="toggle">Another nested element</a>
            <div class="inner">
              <p>
                As long as the inner element has inner as one of its classes then it will be toggled.
              </p>
              <p>
                Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas tempus placerat fringilla. Duis a elit et dolor laoreet volutpat. Aliquam ultrices mauris id mattis imperdiet. Aenean cursus ultrices justo et varius. Suspendisse aliquam orci id dui dapibus
                blandit. In hac habitasse platea dictumst. Sed risus velit, pellentesque eu enim ac, ultricies pretium felis.
              </p>
            </div>
          </li>
        </ul>
      </li>
      
      <li>Option 2</li>
      
      <li>Option 3</li>
    </ul>
  </li>
</ul>

script.js

$('.toggle').click(function(e) {
  	e.preventDefault();
  
    var $this = $(this);
  
    if ($this.next().hasClass('show')) {
        $this.next().removeClass('show');
        $this.next().slideUp(350);
    } else {
        $this.parent().parent().find('li .inner').removeClass('show');
        $this.parent().parent().find('li .inner').slideUp(350);
        $this.next().toggleClass('show');
        $this.next().slideToggle(350);
    }
});

scripts

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

style.less

@import url('https://fonts.googleapis.com/css?family=Pacifico|Open+Sans:300,400,600');

* {
    box-sizing: border-box;
    font-family: 'Open Sans',sans-serif;
    font-weight: 300;
}

a {
    text-decoration: none;
    color: inherit;
}

p {
    font-size:1.1em;
    margin: 1em 0;
}

.description {
  margin: 1em auto 2.25em;
}

body {
    width: 40%;
    min-width: 300px;
    max-width: 400px;
    margin: 1.5em auto;
    color: #333;
}

h1 {
    font-family: 'Pacifico', cursive;
    font-weight: 400;
    font-size: 2.5em;
}

ul {
    list-style: none;
    padding: 0;
  
    .inner {
        padding-left: 1em;
        overflow: hidden;
        display: none;
      
        &.show {
          /*display: block;*/
        }
    }
  
    li {
        margin: .5em 0;
      
        a.toggle {
            width: 100%;
            display: block;
            background: rgba(0,0,0,0.78);
            color: #fefefe;
            padding: .75em;
            border-radius: 0.15em;
            transition: background .3s ease;
          
            &:hover {
                background: rgba(0, 0, 0, 0.9);
            }
        }
    }
}