<!DOCTYPE html> <title> Opacity animation creates stacking context in delay phase </title> <style> span { height: 100px; width: 100px; position: fixed; background: green; top: 50px; } @keyframes Opaque { from, to { opacity: 1 } } #test { width: 100px; height: 100px; background: blue; animation: Opaque 100s 100s; } </style> <span></span> <div id="test"></div>
