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<!DOCTYPE html>
<html class='reftest-wait'>
<title>Sticky elements inside fixed ancestors shouldn't account for scroll</title>
<link rel="match" href="position-sticky-fixed-ancestor-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<link rel="help" href="https://crbug.com/1019142">
<meta name="assert" content="This test checks that a sticky element inside a fixed subtree doesn't scroll with the viewport "/>
<script src="/common/reftest-wait.js"></script>
<script src="../resources/ref-rectangle.js"></script>
<style>
body,html {
margin: 0;
width: 100%;
height: 100%;
}
.sticky {
background: green;
position: sticky;
bottom: 50vh;
width: 100px;
height: 10%;
}
.spacer {
height: 90%;
}
.long {
height: 600vh;
}
.position-parent {
position: absolute;
display: flex;
align-items: center;
justify-content: center;
width: 100%;
height: 100%;
top: 100vh;
background-color: lightgrey;
}
.container {
width: 100px;
height: 100%;
background-color: grey;
}
button {
position: fixed;
left: 20px;
top: 20px;
}
.fixed {
position: fixed;
top: 25vh;
}
</style>
<div>You should see a green box below. No blue should be visible.</div>
<div class="position-parent">
<div class="container">
<div class="spacer"></div>
<div class="sticky"></div>
</div>
</div>
<div class="long"></div>
<button id="button">Toggle Fixed</button>
<script>
function toggleFixed() {
document.querySelector('.position-parent').classList.toggle('fixed');
}
document.getElementById('button').addEventListener('click', toggleFixed);
requestAnimationFrame(() => {
window.scrollTo(0, document.querySelector('.long').clientHeight);
createIndicatorForStickyElements(document.querySelectorAll('.sticky'));
requestAnimationFrame(() => {
toggleFixed();
takeScreenshot();
});
});
</script>
</html>
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