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>
            <span>Sub menu 1</span>
          </li>
          <li>
            <span>Sub menu 2</span>
          </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

nav.side-navigation {
  width: 300px;
  height: 100%;
  position: fixed;
  background-color: #F60;
}

.navigation-container {
  > ul {
    margin: 0;
    padding: 0;
    list-style: none;
    background-color: #789;
    position: relative;
    > li {
      overflow: hidden;
      height: 40px;
      > span {
        display: block;
        height: 40px;
        cursor: pointer;
      }
      &.w-sub {
        ul {
          background-color: #fff;
        }
        &.active {
          height: auto;
        }
      }
    }
  }
}

JavaScript

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