File: anchor-scroll-fixedpos-003.html

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<!DOCTYPE html>

<title>Tests that fixed-positioned anchor-positioned elements doesn't get clipped by the viewport</title>
<link rel="author" href="mailto:kiet.ho@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/">
<link rel="match" href="reference/anchor-scroll-fixedpos-003-ref.html">

<style>
  body {
    margin: 0;
  }

  div {
    width: 100px;
    height: 100px;
    font-size: 16px;
  }

  #anchor {
    anchor-name: --a1;
    margin-top: 105vh;
    background: orange;
  }

  #anchored {
    position: fixed;
    position-anchor: --a1;
    left: anchor(left);
    bottom: anchor(top);
    background: green;
    color: white;
  }
</style>

<body>
  <div id="anchor"></div>
  <div id="anchored">Anchored element</div>

  <script>
    const anchor = document.getElementById("anchor");
    anchor.scrollIntoView(false);
  </script>
</body>