JSFiddle - React, Tailwind, and code Playground

by iBertel

HTML

<nav class="side-navigation">
  <div class="navigation-container">
    <h3>Main level</h3>
    <ul>
      <li class="w-sub">
        <span>Menu 1</span>
        <ul>
          <li>
            <span>Sub menu 1</span>
          </li>
          <li>
            <span>Sub menu 2</span>
          </li>
        </ul>
      </li>
      <li class="w-sub">
        <span>Menu 2</span>
        <ul>
          <li class="w-sub">
            <span>Sub menu 1</span>
            <ul>
              <li>
                <span>Sub sub menu 1</span>
              </li>
              <li>
                <span>Sub sub menu 2</span>
              </li>
            </ul>
          </li>
          <li class="w-sub">
            <span>Sub menu 2</span>
            <ul>
              <li>
                <span>Sub sub menu 1</span>
              </li>
              <li>
                <span>Sub sub menu 2</span>
              </li>
            </ul>
          </li>
          <li>
            <span>Sub menu 3</span>
          </li>
          <li>
            <span>Sub menu 4</span>
          </li>
        </ul>
      </li>
      <li>
        <span>Menu 3</span>
      </li>
    </ul>
  </div>
</nav>

SCSS

body {
  font-family: sans-serif;
}

nav.side-navigation {
  width: 300px;
  height: 100%;
  position: fixed;
  background-color: #336ca6;
  color: #fff;
  h3 {
    font-size: 20px;
    padding: 10px 20px;
  }
}

.navigation-container {
  ul {
    margin: 0;
    padding: 0;
    list-style: none;
    background-color: #336ca6;
    position: relative;
    li {
      overflow: hidden;
      //box-shadow: inset 0 1px rgba(0, 0, 0, 0.1);
      //border-bottom:1px solid rgba(0,0,0,0.1);      
      overflow: hidden;
      span {
        display: block;
        padding: 10px 20px;
        cursor: pointer;
        color: #333;
      }
      &.w-sub {
        height: 38px;
        &.active {
          height: auto;
        }
      }
      ul {
        background: rgba(0, 0, 0, 0.1);
      }
    }
  }
}

JavaScript

$('.w-sub > span').on('click', function() {
  $(this).parent('li').toggleClass('active').siblings().removeClass('active');
});