JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>test</li>
</ul>
<div class="container">
  <article>
     <h1>A venir</h1>
  </article>
</div>
<article class="red">
  <h1>A venir</h1>
</article>

CSS

.container {
  position: relative;
}

article{
    position:absolute;
    background-color:green;
    left:10px;
    top:100px;
 }
 
 .red {
   background-color: red;
 }