| <!DOCTYPE html> |
| <title>Scaling with viewport units</title> |
| <link rel="help" href="https://drafts.csswg.org/css-values-4/#viewport-relative-lengths"> |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1860338"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <iframe id=iframe width=640 height=480></iframe> |
| |
| <script> |
| |
| const doc = iframe.contentDocument; |
| const win = iframe.contentWindow; |
| |
| function test_computed_value(value, expected) { |
| test((t) => { |
| t.add_cleanup(() => { doc.body.innerHTML = ''; }); |
| doc.body.innerHTML = ` |
| <!doctype html> |
| <style> |
| * { margin: 0; } |
| body { height: 100%; } |
| div { height: ${value}; } |
| </style> |
| <div></div> |
| `; |
| let div = doc.querySelector('div'); |
| assert_equals(win.getComputedStyle(div).height, expected); |
| }, `${value} computes to ${expected}`); |
| } |
| |
| // Check the basic units are as expected |
| test_computed_value('100vw', '640px'); |
| test_computed_value('100vh', '480px'); |
| |
| // Try some calculations involving extreme scaling |
| test_computed_value('calc((1vw - 6.3999px) * 10000000)', '1000px'); |
| test_computed_value('calc((100vh - 479px) * 60000)', '60000px'); |
| |
| </script> |
