Fancy Clickable List Items

For the WebGL slider

by Arjun Singh

HTML

<ul>
  <li>
    <span class="text">01</span>
    <span class="O">&#8226;</span>
  </li>
  <li>
    <span class="text">02</span>
    <span class="O">&#8226;</span>
  </li>
  <li>
    <span class="text">03</span>
    <span class="O">&#8226;</span>
  </li>
</ul>

CSS

ul{
  padding: 8px;
  background-color: black;
  
  list-style-type: none;
  
  display: flex;
  gap: 8px;
  
  color: white;
  font-family: 'Helvetica';
  font-size: 1.5rem;
  
  perspective: 1000px;
}


li{
  position: relative;
  cursor: pointer;
  user-select: none;
  
  transform-style: preserve-3d;
}

li span{
  display: inline-block;
  transform-origin: center center;
}

li span.text{
  transition: all 0.25s linear;
}

li span.O{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  
  position: absolute;
  top: 0;
  left: 0;
  
  height: 100%;
  width: 100%;
  
  transform: rotateX(90deg);
  
  transition: all 0.25s linear;
  transition-delay: 0.25s;
  
  font-size: 2em;
}

li.clicked span.text{
  transform: rotateX(90deg);
}

li.clicked span.O{
  transform: rotateX(0);
}

JavaScript

const li = Array.from(document.querySelectorAll("li"));

li.forEach(elem => {
  elem.onclick = () => elem.classList.toggle("clicked")
});