css/css-display/display-flow-root-dynamic.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>CSS Test: dynamically changing the outer display type while keeping a flow-root inner display type</title>
<link rel="author" title="Oriol Brufau" href="obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-display-3/#outer-role">
<link rel="help" href="https://drafts.csswg.org/css-display-3/#valdef-display-flow-root">
<link rel="match" href="display-flow-root-dynamic-ref.html">
<meta name="assert" content="The text 'A B C' should appear on a single line.">

A
<div id="target" style="display: block flow-root">B</div>
C

<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<script>
waitForAtLeastOneFrame().then(() => {
  target.style.display = "inline flow-root";
  takeScreenshot();
});
</script>
</html>