| <!DOCTYPE html> |
| <html> |
| <title>CSS aspect-ratio: canvas with aspect-ratio and contain:size</title> |
| <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com"> |
| <link rel="author" title="Mozilla" href="https://www.mozilla.org/"> |
| <link rel="help" href="https://drafts.csswg.org/css-sizing-4/#aspect-ratio"> |
| <link rel="help" href="https://github.com/w3c/csswg-drafts/issues/5550"> |
| <link rel="match" href="../../reference/ref-filled-green-100px-square.xht"> |
| <meta name="assert" content="This test verifies aspect-ratio's <ratio> is used to determine the canvas' size because contain:size enforces no intrinsic aspect ratio."> |
| |
| <style> |
| canvas { |
| width: 100px; |
| aspect-ratio: 1/1; |
| contain: size; |
| } |
| </style> |
| |
| <script> |
| window.onload = function() { |
| const canvas = document.querySelector('canvas'); |
| const ctx = canvas.getContext('2d'); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 200, 200); |
| } |
| </script> |
| |
| <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> |
| <canvas width=200 height=200></canvas> |
| </html> |
