| <!DOCTYPE html> |
| <title>CSS Container Queries Test: style() query with rem unit for registered custom property</title> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#style-container"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/cq-testcommon.js"></script> |
| <style> |
| @property --length { |
| syntax: "<length>"; |
| initial-value: 0px; |
| inherits: false; |
| } |
| |
| :root, body { font-size: 16px; } |
| #container { --length: 100px; } |
| |
| #target { color: red; } |
| @container style(--length: calc(1rem * 10)) { |
| #target { color: green; } |
| } |
| </style> |
| <div id="container"> |
| <div id="target">Should be green</div> |
| </div> |
| <script> |
| test(() => { |
| assert_equals(getComputedStyle(target).color, "rgb(255, 0, 0)"); |
| }, "Initially, 1rem * 10 evaluates to 160px"); |
| |
| test(() => { |
| document.documentElement.style.fontSize = "10px"; |
| assert_equals(getComputedStyle(target).color, "rgb(0, 128, 0)"); |
| }, "Changing the :root font-size to 10px makes 1rem * 10 evaluate to 100px"); |
| </script> |
