<!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"> <style type="text/css"> div { border: solid 15px green; outline: none; } </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> <body> </html>