Multi-level Dropdown

    1. Playing soccer
      1. Salsa
      2. Rock’n’Roll
        1. Lindy Hop
        2. Charleston
    3. Gardening
    1. Watching movies
    2. Meditate
  3. Others

Code

<button>Focusable element before</button>
<ol data-adg-dropdown="">
  <li>
    <button aria-expanded="false">▾ Physical activities</button>
    <ol>
      <li>
        <a href="http://www.google.ch/search?q=soccer">Playing soccer</a>
      </li>
      <li>
        <button aria-expanded="false">▸ Dancing</button>
        <ol>
          <li>
            <a href="http://www.google.ch/search?q=salsa">Salsa</a>
          </li>
          <li>
            <a href="http://www.google.ch/search?q=rocknroll">Rock'n'Roll</a>
          </li>
          <li>
            <button aria-expanded="false">▸ Swing</button>
            <ol>
              <li>
                <a href="http://www.google.ch/search?q=lindyhop">Lindy Hop</a>
              </li>
              <li>
                <a href="http://www.google.ch/search?q=charleston">Charleston</a>
              </li>
            </ol>
          </li>
        </ol>
      </li>
      <li>
        <a href="http://www.google.ch/search?q=gardening">Gardening</a>
      </li>
    </ol>
  </li>
  <li>
    <button aria-expanded="false">▾ Relaxing activities</button>
    <ol>
      <li>
        <a href="http://www.google.ch/search?q=movies">Watching movies</a>
      </li>
      <li>
        <a href="http://www.google.ch/search?q=meditate">Meditate</a>
      </li>
    </ol>
  </li>
  <li>
    <a href="http://www.google.ch/search?q=others">Others</a>
  </li>
</ol>
<p>
  <button>Focusable element after</button>
</p>
*:focus {
  outline: 2px dotted #000;
}

p {
  clear: left;
}
p button {
  margin-top: 20px;
}

ol {
  padding: 0;
}
ol > li {
  float: left;
  list-style: none;
  position: relative;
}
ol a, ol button {
  display: block;
  border: 1px solid #000;
  color: #000;
  background-color: lightyellow;
  padding: 10px;
  width: 200px;
  box-sizing: border-box;
  text-decoration: none;
}
ol a:hover, ol button:hover {
  text-decoration: underline;
}
ol button {
  font-size: inherit;
  font-family: inherit;
  text-align: inherit;
  height: 40px;
}
ol button:hover {
  cursor: pointer;
}
ol button[aria-expanded=true] + ol {
  position: absolute;
}
ol button[aria-expanded=true] + ol ol {
  left: 100%;
  top: 0;
}
ol button[aria-expanded=false] + ol {
  display: none;
}
(function() {
  var AdgDropdown;

  AdgDropdown = class AdgDropdown {
    constructor(el) {
      this.$el = $(el);
      this.initExpandables();
    }

    initExpandables() {
      return this.$el.find("[aria-expanded]").click((e) => {
        var $button, $container;
        $button = $(e.target);
        $container = $($button.next("*"));
        if ($container.is(':visible')) {
          return this.hide($button, $container);
        } else {
          return this.show($button, $container);
        }
      });
    }

    show($button, $container) {
      $container.attr('hidden', false);
      return $button.attr('aria-expanded', true);
    }

    hide($button, $container) {
      $container.attr('hidden', true);
      return $button.attr('aria-expanded', false);
    }

  };

  $(document).ready(function() {
    return $('[data-adg-dropdown]').each(function() {
      return new AdgDropdown(this);
    });
  });

}).call(this);

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//# sourceURL=coffeescript