Blitz - WPT: background-attachment-computed.html

wpt / css / css-backgrounds / parsing / background-attachment-computed.html

Data from commit:
a50cb89 wpt: run reference-named files which are themselves tests (#836) (2026-09-03)

Subtest	Status	Message
Property background-attachment value 'fixed'	PASS
Property background-attachment value 'scroll, fixed, local'	FAIL	assert_true: 'scroll, fixed, local' is a supported value for background-attachment. expected true got false
Property background-attachment value 'scroll' multiple base values	PASS
Property background-attachment value 'scroll, fixed' multiple base values	PASS
Property background-attachment value 'scroll, fixed, local' multiple base values	FAIL	assert_true: 'scroll, fixed, local' is a supported value for background-attachment. expected true got false

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/css/css-backgrounds/parsing/background-attachment-computed.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Backgrounds and Borders: getComputedStyle().backgroundAttachment</title>
<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#background-attachment">
<meta name="assert" content="background-attachment computed value is as specified.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
</head>
<body>
<div id="target"></div>
<script>
test_computed_value("background-attachment", "fixed");
test_computed_value("background-attachment", "scroll, fixed, local");

document.getElementById("target").style['background-image'] = "none, none";
test_computed_value("background-attachment", "scroll", "scroll", "multiple base values");
test_computed_value("background-attachment", "scroll, fixed", "scroll, fixed", "multiple base values");
test_computed_value("background-attachment", "scroll, fixed, local", "scroll, fixed, local", "multiple base values");
</script>
</body>
</html>