| <!DOCTYPE html> |
| <html class="reftest-wait"> |
| <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1"> |
| <title>Tests anchor positioning with nested scroll containers</title> |
| <link rel="author" href="mailto:xiaochengh@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/css-anchor-1/"> |
| <link rel="match" href="reference/anchor-scroll-nested-ref.html"> |
| <style> |
| body { |
| margin: 0; |
| width: 1500px; |
| height: 1500px; |
| position: relative; |
| } |
| |
| #outer-scroller { |
| margin: 500px; |
| width: 350px; |
| height: 350px; |
| outline: 1px solid black; |
| overflow: scroll; |
| } |
| |
| #inner-scroller { |
| margin: 100px; |
| width: 250px; |
| height: 250px; |
| outline: 1px solid black; |
| overflow: scroll; |
| } |
| |
| #anchor { |
| margin: 200px; |
| width: 50px; |
| height: 50px; |
| background-color: green; |
| anchor-name: --anchor; |
| } |
| |
| .anchored { |
| position: absolute; |
| width: 50px; |
| height: 50px; |
| left: anchor(left); |
| position-anchor: --anchor; |
| } |
| |
| .above { |
| bottom: anchor(top); |
| background-color: red; |
| } |
| |
| .below { |
| top: anchor(bottom); |
| background-color: yellow; |
| } |
| </style> |
| |
| <div id="outer-scroller"> |
| <div id="inner-scroller"> |
| <div id="anchor"></div> |
| <div class="anchored above"></div> |
| </div> |
| </div> |
| |
| <div class="anchored below"></div> |
| |
| <script> |
| function raf() { |
| return new Promise(resolve => requestAnimationFrame(resolve)); |
| } |
| |
| async function runTest() { |
| await raf(); |
| await raf(); |
| |
| document.documentElement.scrollTop = 400; |
| document.documentElement.scrollLeft = 400; |
| |
| let outerScroller = document.getElementById('outer-scroller'); |
| outerScroller.scrollTop = 50; |
| outerScroller.scrollLeft = 50; |
| |
| let innerScroller = document.getElementById('inner-scroller'); |
| innerScroller.scrollTop = 100; |
| innerScroller.scrollLeft = 100; |
| |
| document.documentElement.classList.remove('reftest-wait'); |
| } |
| runTest(); |
| </script> |
