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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Backgrounds and Borders Module Level 4: getComputedValue().backgroundPositionX</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-4/#propdef-background-position-x">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<style>
#target {
font-size: 40px;
}
</style>
</head>
<body>
<div id="target"></div>
<script>
test_computed_value("background-position-x", "center", "50%");
test_computed_value("background-position-x", "left", "0%");
test_computed_value("background-position-x", "right", "100%");
test_computed_value("background-position-x", "x-start");
test_computed_value("background-position-x", "x-end");
test_computed_value("background-position-x", "-20%");
test_computed_value("background-position-x", "10px");
test_computed_value("background-position-x", "0.5em", "20px");
test_computed_value("background-position-x", "calc(10px - 0.5em)", "-10px");
test_computed_value("background-position-x", "left -20%", "-20%");
test_computed_value("background-position-x", "right 10px", "calc(100% + 10px)");
test_computed_value("background-position-x", "-20%, 10px");
test_computed_value("background-position-x", "center, left, right", "50%, 0%, 100px");
test_computed_value("background-position-x", "0.5em, x-start, x-end", "20px, x-start, x-end");
test_computed_value("background-position-x", "calc(10px - 0.5em), left -20%, right 10px", "-10px, -20%, calc(100% + 10px)");
</script>
</body>
</html>