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<!DOCTYPE html>
<title>position: sticky should create a stacking context</title>
<link rel="match" href="position-sticky-stacking-context-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="position:sticky elements should create a stacking context" />
<script src="../resources/ref-rectangle.js"></script>
<style>
.indicator {
position: absolute;
background-color: green;
z-index: 1;
}
.sticky {
position: sticky;
z-index: 0;
}
.child {
position: relative;
background-color: red;
z-index: 2;
}
.box {
width: 200px;
height: 200px;
}
</style>
<script>
window.addEventListener('load', function() {
createIndicatorForStickyElements(document.querySelectorAll('.sticky'));
})
</script>
<div>You should see a single green box below. No red or blue should be visible.</div>
<div class="indicator box"></div>
<div class="sticky box">
<!-- Because sticky forms a stacking context, this child remains on bottom
even though it has a higher z-index than the indicator box. -->
<div class="child box"></div>
</div>
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