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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Positioned Layout Test: an element with 'position: sticky' creates a stacking context</title>
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos">
<meta name="assert" content="This test checks that an element with 'position: sticky' creates a stacking context. In this test, the first 2 divs have the same 'auto' z-index value but since div#sticky is last in document tree order, then it must overlap div#overlapped-red. The final div#overlap-bottom-half-of-sticky exists to make sure that the div#sticky is squeezed, is 'sandwiched' between the other 2.">
<style>
div
{
height: 100px;
width: 100px;
}
div#overlapped-red
{
background-color: red;
position: absolute;
}
div#sticky
{
background: linear-gradient(to bottom, green 51%, red 49%);
position: sticky;
}
div#overlap-bottom-half-of-sticky
{
background-color: green;
bottom: 50px;
height: 50px;
position: relative;
}
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.
<div id="overlapped-red"></div>
<div id="sticky"></div>
<div id="overlap-bottom-half-of-sticky"></div>
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