| <!doctype html> |
| <title>@container: originating element container for pseudo elements</title> |
| <link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/cq-testcommon.js"></script> |
| <style> |
| #target { container-type: inline-size; } |
| #target::before, |
| #target::after, |
| #target::marker, |
| #target::first-line, |
| #target::first-letter, |
| #target::backdrop { |
| font-size: 0px; |
| } |
| @container (width >= 300px) { |
| #target::before, |
| #target::after, |
| #target::marker, |
| #target::first-line, |
| #target::first-letter, |
| #target::backdrop { |
| font-size: 10cqw; |
| } |
| } |
| </style> |
| <div id="outer" style="width: 200px"> |
| <div id="target"></div> |
| </div> |
| <script> |
| setup(() => assert_implements_container_queries()); |
| |
| const pseudo_elements = ["::before", "::after", "::marker", "::first-line", "::first-letter", "::backdrop"]; |
| |
| pseudo_elements.forEach((pseudo_element) => { |
| test(() => { |
| assert_equals(getComputedStyle(target, pseudo_element).fontSize, "0px"); |
| }, `Initial font-size for ${pseudo_element}`); |
| }); |
| |
| outer.style.width = "300px"; |
| |
| pseudo_elements.forEach((pseudo_element) => { |
| test(() => { |
| assert_equals(getComputedStyle(target, pseudo_element).fontSize, "30px"); |
| }, `font-size for ${pseudo_element} depending on container`); |
| }); |
| </script> |