wpt/css/css-anchor-position/anchor-center-003.html at d31d6f2571e1ae549b06c14504ea18eb18a99f8e · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-center">
<link rel="author" href="mailto:plampe@igalia.com">
<title>Tests the position and available-size of 'anchor-center' alignment with target width: auto.</title>
<style>
.container {
  width: 100px;
  height: 100px;
  border: solid 3px;
  position: relative;
  margin: 50px;
}

.anchor {
  anchor-name: --anchor;
  position: relative;
  width: 50px;
  height: 50px;
  left: 40px;
  top: 5px;
  background: lime;
}

.target {
  position-anchor: --anchor;
  position: fixed;
  background: cyan;
  justify-self: anchor-center;
  top: anchor(bottom);
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>

<body onload="checkLayout('.target')">

<div class="container">
  <div class="anchor"></div>
  <div class="target" data-expected-width="30" data-offset-x="111">
    <div style="width:30px;height:20px;"></div>
  </div>
</div>