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<!doctype html>
<html class="reftest-wait">
<title>CSS Test: Checks that dynamic changes to whether we're a fixed-pos containing block are handled correctly</title>
<meta charset="utf-8">
<link rel="help" href="https://drafts.csswg.org/css-transforms-1/#containing-block-for-all-descendants">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1498873">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="match" href="dynamic-fixed-pos-cb-change-ref.html">
<style>
html,
body {
height: 100%;
overflow: hidden;
margin: 0;
padding: 0;
background-color: #222;
}
body {
display: flex;
}
#fixed {
position: fixed;
width: 100%;
height: 100%;
top: 0;
left: 0;
z-index: 1;
background: black;
}
#popup {
position: absolute;
width: 200px;
height: 200px;
left: 0;
top: 0;
z-index: 2;
background: red;
transform: scale( 1.1111 );
}
body, #popup {
transform-origin: 50% 50%;
}
</style>
<div id="popup">
<!-- Seeing this box change color should not move me or change my size. -->
</div>
<div id="fixed"></div>
<script>
onload = function() {
requestAnimationFrame(() => {
document.body.style.transform = "scale(0.9)";
requestAnimationFrame(() => {
popup.style.backgroundColor = "green";
requestAnimationFrame(() => {
document.documentElement.className = "";
});
});
});
}
</script>
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