<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#propdef-anchor-name">
<link rel="author" href="mailto:kojii@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
#container {
  position: relative;
  transform: translate(0, 0);  /* Make it a containing block. */
}
#anchor1 {
  anchor-name: --a1;
  width: 5px;
  height: 7px;
  background: orange;
}
#anchor2 {
  anchor-name: --a2;
  width: 9px;
  height: 11px;
  background: blue;
}
#anchor3 {
  anchor-name: --a3;
  width: 13px;
  height: 15px;
  background: purple;
}
.target {
  position: absolute;
}
</style>
<!--
  The anchors are in different containing blocks, but they still fulfill the
  conditions:
  * if it has a different containing block from the querying element, the last
    containing block in its containing block chain before reaching the querying
    element’s containing block is not, itself, positioned.
  https://drafts.csswg.org/css-anchor-1/#determining

  From the definition of the "containing block":
  https://drafts.csswg.org/css-position/#def-cb
  properties such as `transform` can create a containing block without setting
  the `position` property.
-->
<body onload="checkLayoutForAnchorPos('.target')">
  <div id="container">
    <div>
      <div id="anchor1"></div>
    </div>
    <div class="target" style="left: anchor(--a1 right)" data-offset-x=5></div>

    <div>
      <div style="transform: translate(0, 0)">
        <div style="position: absolute; left: 10px;">
          <div id="anchor2"></div>
        </div>
      </div>
    </div>
    <div class="target" style="left: anchor(--a2 right)" data-offset-x=19></div>

    <div>
      <div style="transform: translate(0, 0)">
        <div style="position: fixed; left: 20px">
          <div id="anchor3"></div>
        </div>
      </div>
    </div>
    <div class="target" style="left: anchor(--a3 right)" data-offset-x=33></div>
  </div>
</body>
