| <!DOCTYPE html> |
| <title>Tests that scroll adjustment still applies when using another anchor in default anchor's scroll container</title> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#needs-scroll-adjustment"> |
| <link rel="author" href="mailto:xiaochengh@chromium.org"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/test-common.js"></script> |
| |
| <style> |
| body { |
| margin: 0; |
| } |
| |
| #scroller { |
| width: 400px; |
| height: 400px; |
| overflow: scroll; |
| position: relative; |
| } |
| |
| #spacer { |
| width: 1000px; |
| height: 1000px; |
| } |
| |
| .anchor { |
| width: 50px; |
| height: 50px; |
| position: absolute; |
| background: orange; |
| } |
| |
| #anchor1 { |
| anchor-name: --a1; |
| left: 300px; |
| top: 100px; |
| } |
| |
| #anchor2 { |
| anchor-name: --a2; |
| left: 200px; |
| top: 200px; |
| } |
| |
| #anchor3 { |
| anchor-name: --a3; |
| left: 100px; |
| top: 300px; |
| } |
| |
| /* Uses different anchors in insets instead of the default anchor. |
| * Still scroll-adjusted because they are in the same scroll container. */ |
| #target { |
| position: fixed; |
| width: 50px; |
| height: 50px; |
| left: anchor(--a3 left); |
| top: anchor(--a1 top); |
| position-anchor: --a2; |
| background: lime; |
| } |
| </style> |
| |
| <div id="scroller"> |
| <div id="spacer"></div> |
| <div class="anchor" id="anchor1"></div> |
| <div class="anchor" id="anchor2"></div> |
| <div class="anchor" id="anchor3"></div> |
| </div> |
| <div id="target"></div> |
| |
| <script> |
| promise_test(async () => { |
| await waitUntilNextAnimationFrame(); |
| assert_equals(target.getBoundingClientRect().left, 100); |
| assert_equals(target.getBoundingClientRect().top, 100); |
| |
| scroller.scrollLeft = 50; |
| await waitUntilNextAnimationFrame(); |
| assert_equals(target.getBoundingClientRect().left, 50); |
| |
| scroller.scrollTop = 50; |
| await waitUntilNextAnimationFrame(); |
| assert_equals(target.getBoundingClientRect().top, 50); |
| }, '#target3 is scroll-adjusted in both axises'); |
| </script> |
