wpt/css/css-anchor-position/anchor-center-visibility-change.html at e9f7db6899e33842a1ac46032e9982f2035aeec2 · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html class=reftest-wait>
<title>Tests 'anchor-center' value when target visibility changes (by changing 'display', 'visibility', or popover trigger)</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#valdef-justify-self-anchor-center">
<link rel="author" href="mailto:plampe@igalia.com">
<link rel="author" href="mailto:kiet.ho@apple.com">
<link rel="match" href="anchor-center-visibility-change-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<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: absolute;
}

.target-inner {
  width: 30px;
  height: 20px;
}

#target-1 {
  justify-self: anchor-center;
  background: cyan;
  display: none;
}

#target-2 {
  align-self: anchor-center;
  background: blue;
  visibility: hidden;
}

#target-3 {
  align-self: anchor-center;
  justify-self: anchor-center;
  background: magenta;

  /* Override default popover style */
  margin: 0;
  padding: 0;
  border: none;
}
</style>

<div class="container">
  <div class="anchor"></div>
  <div id="target-1" class="target">
    <div class="target-inner"></div>
  </div>
  <div id="target-2" class="target">
    <div class="target-inner"></div>
  </div>
  <div id="target-3" class="target" popover>
    <div class="target-inner"></div>
  </div>
</div>

<script>
  // Targets should be invisible initially.
  waitForAtLeastOneFrame().then(() => {
    // Change targets to be visible.
    document.getElementById('target-1').style.display = 'flow';
    document.getElementById('target-2').style.visibility = 'visible';
    document.getElementById('target-3').showPopover();

    waitForAtLeastOneFrame().then(() => {
      // Targets should be visible now.
      takeScreenshot();
    });
  });
</script>