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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-position/sticky/position-sticky-offset-overflow.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>Sticky positioning can cause overflow but must be accessible.</title>
<meta name="assert" content="This test checks that a sticky positioned element
does not extend overflow" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.container {
overflow-y: scroll;
width: 100px;
height: 100px;
}
.box {
background-color: green;
height: 50px;
width: 50px;
}
.sticky {
position: sticky;
top: 200px; /* Forces the sticky position element below the overflow. */
}
</style>
<div id="scroller1" class="container">
<div class="sticky box"></div>
</div>
<script>
test(() => {
var scroller = document.getElementById('scroller1');
var sticky = scroller.querySelector('.sticky');
var stickyOffset = sticky.offsetTop -
scroller.scrollTop - scroller.offsetTop;
assert_equals(stickyOffset, 50);
assert_equals(scroller.scrollHeight, 100);
}, 'sticky position offset should be contained by scrolling box');
</script>