JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <style>
    html, body {
      margin: 0;
      padding: 0;
    }

    .absolute {
      position: absolute;

      left: 0;
      right: 0;

      width: 200px;

      margin-left: auto; /* MDN suggests margin-left is computed as 0? */

      background: magenta;
    }
  </style>
</head>
<body>
  <div class="absolute">Hello World!</div>
</body>
</html>