File: anchor-transition-004.html

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<!DOCTYPE html>
<title>CSS Anchor Positioning Test: getComputedStyle not affecting anchor transition</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  body { margin: 0; }
  #anchor {
    anchor-name: --a;
    width: 100px;
    height: 100px;
    background: teal;
  }
  #anchored {
    position: absolute;
    position-anchor: --a;
    left: anchor(right, 17px);
    top: anchor(top, 17px);
    width: 100px;
    height: 100px;
    background: orange;
    transition: left 2s;
  }
</style>
<div id="anchor"></div>
<div id="anchored"></div>
<script>
  test(() => {
    // Force a style update
    getComputedStyle(document.body).color;
    assert_equals(anchored.offsetLeft, 100);
  }, "getComputedStyle should not affect whether an anchor positioned element transitions from display:none");
</script>