Blitz - WPT: position-area-change.html

wpt / css / css-anchor-position / position-area-change.html

/css/css-anchor-position/position-area-change.html

<!DOCTYPE html>
<html class="reftest-wait">
<link rel="author" href="github.com/vmpstr">
<meta name="assert" content="green box should be below the yellow box">
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/">
<link rel="match" href="position-area-change-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
  body, html {
    margin: 0;
    padding: 0;
  }
  .spacer {
    height: 300px;
  }
  #anchor {
    anchor-name: --anchor;
    background: yellow;
    width: 100px;
    height: 50px;
  }
  #anchored {
    position: fixed;
    position-anchor: --anchor;
    position-area: top;
    position-try: flip-block;
    background: green;
    width: 100px;
    height: 50px;
  }
</style>
<div class=spacer></div>
<div id="anchored"></div>
<div id="anchor"></div>
<div class=spacer></div>
<script>
  requestAnimationFrame(() => {
    document.documentElement.scrollTop = 400;
    requestAnimationFrame(() => {
      anchored.style.positionArea = "bottom";
      takeScreenshot();
    });
  });
</script>

/css/css-anchor-position/position-area-change-ref.html

<!DOCTYPE html>
<meta name="assert" content="green box should be below the yellow box (ref)">
<style>
  body, html {
    margin: 0;
    padding: 0;
  }
  .spacer {
    height: 300px;
  }
  #anchor {
    background: yellow;
    width: 100px;
    height: 50px;
  }
  #anchored {
    position: absolute;
    top: 350px;
    left: 0;
    background: green;
    width: 100px;
    height: 50px;
  }
</style>
<div class=spacer></div>
<div id="anchored"></div>
<div id="anchor"></div>
<div class=spacer></div>
<script>
document.documentElement.scrollTop = 400;
</script>