File: anchor-position-non-anchored-fallback.html

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<!DOCTYPE html>
<title>CSS Anchor Positioning Test: Invalidation of fallback without anchor references</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#fallback-apply">
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<style>
  #anchor {
    anchor-name: --anchor;
    background: green;
    width: 100px;
    height: 100vh;
  }
  #anchored {
    background: green;
    top: anchor(--anchor bottom);
    width: 100px;
    height: 50px;
    position: absolute;
    position-try: --bottom;
  }

  @position-try --bottom {
    top: auto;
    bottom: 0px;
  }
</style>
<p>Test passes if there is a filled green square.</p>
<div id="anchor"></div>
<div id="anchored"></div>
<script>
  anchor.offsetTop;
  anchor.style.height = "50px";
</script>