| <!DOCTYPE html> |
| <title>CSS @container queries basic support</title> |
| <meta charset="utf-8"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#container-rule"> |
| <!-- Regression test for https://github.com/jsdom/jsdom/issues/3597 --> |
| |
| <style> |
| .container { |
| container-type: inline-size; |
| width: 800px; |
| } |
| |
| @container (min-width: 700px) { |
| .card h2 { |
| font-size: 2em; |
| color: blue; |
| } |
| } |
| |
| h2 { |
| font-size: 1em; |
| color: black; |
| } |
| </style> |
| |
| <div class="container"> |
| <div class="card"> |
| <h2 id="testHeader">Test header</h2> |
| </div> |
| </div> |
| |
| <script> |
| "use strict"; |
| |
| test(() => { |
| const h2 = document.getElementById("testHeader"); |
| const styles = window.getComputedStyle(h2); |
| |
| assert_equals(styles.fontSize, "32px"); |
| assert_equals(styles.color, "rgb(0, 0, 255)"); |
| }); |
| </script> |
