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- This WPT test may be referenced by the following Test IDs:
            
- /css/css-anchor-position/position-anchor-004.html - WPT Dashboard Interop Dashboard
 
 
<!DOCTYPE html>
<html class=reftest-wait>
<title>Tests 'position-anchor' property when target visibility changes</title>
<link rel="author" href="mailto:plampe@igalia.com">
<link rel="match" href="position-anchor-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<style>
.anchor {
  width: 100px;
  height: 100px;
  background: orange;
}
.target {
  position: fixed;
  width: 100px;
  height: 100px;
  background: lime;
  top: anchor(bottom);
  left: anchor(left);
}
body {
  margin: 0;
}
#anchor1 {
  anchor-name: --a1;
  margin-left: 100px;
}
#target1 {
  position-anchor: --a1;
}
#anchor2 {
  anchor-name: --a2;
  margin-left: 300px;
  margin-top: 100px;
}
#target2 {
  position-anchor: --a2;
}
</style>
<div id="anchor1" class="anchor">anchor1</div>
<div id="anchor2" class="anchor">anchor2</div>
<div id="target1" class="target">target1</div>
<div id="target2" class="target">target2</div>
<script>
  // #target2 should be initially visible.
  waitForAtLeastOneFrame().then(() => {
    // Change #target2 to be invisible.
    document.getElementById('target2').style.display = 'none';
    waitForAtLeastOneFrame().then(() => {
      // #target2 should be invisible now.
      // Change #target2 to be visible.
      document.getElementById('target2').style.display = 'flow';
      waitForAtLeastOneFrame().then(() => {
        // #target2 should be visible and anchor-positioned again now.
        takeScreenshot();
      });
    });
  });
</script>