<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS Test: :focus-within selector</title> <link rel="author" title="Ethan Lin" href="mailto:ethlin@mozilla.com"> <link rel="author" title="Mozilla" href="https://www.mozilla.org"> <link rel="help" href="https://drafts.csswg.org/selectors-4/#focus-within-pseudo"> <meta name="assert" content="Test checks :focus-within should not apply after element removed."> <link rel="match" href="focus-within-2-ref.html"> <meta name="flags" content="interact"> <style type="text/css"> div { border: solid 15px green; outline: none; } div:focus-within { border-color: red; } </style> </head> <body> <p>Test passes if, when the element is focused and then removed, the outer element should change to green.</p> <div id="parent"> <div id="child" tabindex="1"></div> </div> <script> var child = document.getElementById('child'); child.focus(); document.body.offsetWidth; var parent = document.getElementById("parent"); parent.removeChild(child); document.body.offsetWidth; </script> </body> </html>