wpt/css/css-anchor-position/anchor-name-005.html at e9f7db6899e33842a1ac46032e9982f2035aeec2 · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#determining">
<link rel="author" href="mailto:kiet.ho@apple.com">
<link rel="match" href="reference/anchor-name-005-ref.html">
<meta name="assert" content="An anchor element with multiple anchor names can be referenced using both names">
<style>
#anchor {
  position: relative;
  top: 10px;
  left: 10px;

  anchor-name: --a1, --a2;
  width: 100px;
  height: 100px;
  background: red;
}
#target {
  position: absolute;
  /* if this fails, the target (green) box is displayed below the anchor (red) box */
  top: anchor(--a1 top);
  /* if this fails, the target box will not fully cover the anchor box */
  left: anchor(--a2 left);

  width: 100px;
  height: 100px;
  background: green;
  z-index: 1;
}
</style>
<body>
  <p>The test passes if there is only one green square with no red.</p>
  <div>
    <div>
        <div id="anchor"></div>
    </div>
    <div id="target"></div>
  </div>
</body>