<!DOCTYPE html> <meta charset="utf-8"> <title>CSS Values and Units Test Reference File</title> <link rel="author" title="Florian Rivoal" href="http://florian.rivoal.net/"> <style> svg { width: 10ch; writing-mode: vertical-rl; text-orientation: upright; } </style> <body> <p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p> <svg viewBox="0 0 100 100"><rect x="0" y="0" width="100" height="100" fill="green"></svg> </body>