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<!DOCTYPE html>
<html class='reftest-wait'>
<link rel="match" href="../reference/ref-filled-green-100px-square-only.html">
<link rel="help" href="https://www.w3.org/TR/css-position-3/" />
<meta name="assert" content="This test checks that a dynamic change in constraints calculates the static position correctly."/>
<script src="/common/reftest-wait.js"></script>
<style>
#container {
position: relative;
background: red;
box-sizing: border-box;
border: solid green 10px;
width: 100px;
height: 100px;
}
#block {
background: green;
height: 40px;
margin-bottom: 20px;
}
#target {
position: absolute;
background: green;
width: 80px;
height: 20px;
top: -10px;
left: -10px;
}
#cover {
position: absolute;
background: green;
width: 80px;
height: 20px;
top: 40px;
left: 0px;
}
</style>
<p>Test passes if there is a filled green square.</p>
<div id="container">
<div id="block"></div>
<div id="target"></div>
<div id="cover"></div>
</div>
<script>
document.body.offsetTop;
const target = document.getElementById('target');
target.style.top = 'initial';
target.style.left = 'initial';
document.body.offsetTop;
takeScreenshot();
</script>
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