| <!DOCTYPE html> |
| <title>Container Relative Units: container relative units fall back to small viewport</title> |
| <link rel="help" href="https://drafts.csswg.org/css-conditional-5/#container-lengths"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/cq-testcommon.js"></script> |
| <style> |
| iframe { |
| width: 200px; |
| height: 320px; |
| } |
| </style> |
| <iframe id=iframe srcdoc=" |
| <style> |
| #parent { |
| container-type: inline-size; |
| width: 64px; |
| height: 50px; |
| } |
| #container { |
| container-type: size; |
| width: 32px; |
| height: 32px; |
| } |
| |
| #target1, #target2 { color: green; } |
| |
| /* Unit should evaluate against width of #parent */ |
| @container ((height = 32px) and (height = 50cqw)) { |
| #target1 { color: blue; } |
| } |
| |
| /* Unit should evaluate against height of iframe */ |
| @container ((height = 32px) and (height = 10cqh)) { |
| #target2 { color: blue; } |
| } |
| |
| </style> |
| <div id=parent> |
| <div id=container> |
| <div id=target1></div> |
| <div id=target2></div> |
| </div> |
| </div> |
| "></iframe> |
| <script> |
| setup(() => assert_implements_size_container_queries()); |
| |
| function waitForLoad(w) { |
| return new Promise(resolve => w.addEventListener('load', resolve)); |
| } |
| |
| promise_test(async () => { |
| await waitForLoad(window); |
| let inner_target1 = iframe.contentDocument.querySelector('#target1'); |
| let inner_target2 = iframe.contentDocument.querySelector('#target2'); |
| assert_equals(getComputedStyle(inner_target1).color, 'rgb(0, 0, 255)'); |
| assert_equals(getComputedStyle(inner_target2).color, 'rgb(0, 0, 255)'); |
| |
| iframe.style = 'height:400px'; |
| |
| // #target1 is not affected since it evaluated against another container. |
| // #target2 *is* affected, because it evaluated against the iframe size |
| // which just changed. |
| assert_equals(getComputedStyle(inner_target1).color, 'rgb(0, 0, 255)'); |
| assert_equals(getComputedStyle(inner_target2).color, 'rgb(0, 128, 0)'); |
| }, 'Use small viewport size as fallback'); |
| </script> |
