Blitz - WPT: clip-path-computed.html

wpt / css / css-masking / parsing / clip-path-computed.html

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

Subtest	Status	Message
Property clip-path value 'circle(calc(10px + 0.5em) at -50% 50%)'	PASS
Property clip-path value 'circle(calc(10px - 0.5em) at 50% -50%)'	PASS
Property clip-path value 'ellipse(at 50% 50%)'	PASS
Property clip-path value 'ellipse(60% closest-side at 50% 50%)'	PASS
Property clip-path value 'polygon(round 1em, 1px 2px, 3em 4em)'	FAIL	assert_true: 'polygon(round 1em, 1px 2px, 3em 4em)' is a supported value for clip-path. expected true got false
Property clip-path value 'polygon(evenodd round 6pt, 1px 2px, 3em 4em, 6pt 6%)'	FAIL	assert_true: 'polygon(evenodd round 6pt, 1px 2px, 3em 4em, 6pt 6%)' is a supported value for clip-path. expected true got false
Property clip-path value 'polygon(round 0px, 1px 2px, 3px 4px)'	FAIL	assert_true: 'polygon(round 0px, 1px 2px, 3px 4px)' is a supported value for clip-path. expected true got false
Property clip-path value 'polygon(round calc(1em + 2px), 1px 2px, 3px 4px)'	FAIL	assert_true: 'polygon(round calc(1em + 2px), 1px 2px, 3px 4px)' is a supported value for clip-path. expected true got false
Property clip-path value 'xywh(0 1% 2px 0.5em)'	PASS
Property clip-path value 'xywh(0px 1% 2px 0.5em round 0)'	PASS
Property clip-path value 'xywh(0px 1% 2px 3% round 0 1px)'	PASS
Property clip-path value 'xywh(0px 1% 2px 3% round 0px 1px 2em)'	PASS
Property clip-path value 'xywh(0px 1% 2px 3% round 0px 1px 2% 3px)'	PASS
Property clip-path value 'xywh(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))'	PASS
Property clip-path value 'rect(auto auto auto auto)'	PASS
Property clip-path value 'rect(0 1% 2px 0.5em)'	PASS
Property clip-path value 'rect(0px 1% auto 0.5em round 0)'	PASS
Property clip-path value 'rect(0px 1% auto 3% round 0 1px)'	PASS
Property clip-path value 'rect(0px 1% auto 3% round 0px 1px 2em)'	PASS
Property clip-path value 'rect(0px 1% auto 3% round 0px 1px 2% 3px)'	PASS
Property clip-path value 'rect(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))'	PASS

Enable JavaScript in test iframe

/css/css-masking/parsing/clip-path-computed.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Shapes Module Level 1: getComputedStyle().clipPath</title>
<link rel="help" href="https://drafts.csswg.org/css-shapes/#clip-path-property">
<meta name="assert" content="clip-path 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>
<style>
  #target {
    font-size: 40px;
  }
</style>
<div id="target"></div>
<script>
test_computed_value("clip-path", "circle(calc(10px + 0.5em) at -50% 50%)", "circle(30px at -50% 50%)");
test_computed_value("clip-path", "circle(calc(10px - 0.5em) at 50% -50%)", "circle(0px at 50% -50%)");
test_computed_value("clip-path", "ellipse(at 50% 50%)");
test_computed_value("clip-path", "ellipse(60% closest-side at 50% 50%)");

test_computed_value(
    "clip-path",
    "polygon(round 1em, 1px 2px, 3em 4em)",
    "polygon(round 40px, 1px 2px, 120px 160px)");
test_computed_value(
    "clip-path",
    "polygon(evenodd round 6pt, 1px 2px, 3em 4em, 6pt 6%)",
    "polygon(evenodd round 8px, 1px 2px, 120px 160px, 8px 6%)");
test_computed_value(
    "clip-path",
    "polygon(round 0px, 1px 2px, 3px 4px)",
    "polygon(1px 2px, 3px 4px)");
test_computed_value(
    "clip-path",
    "polygon(round calc(1em + 2px), 1px 2px, 3px 4px)",
    "polygon(round 42px, 1px 2px, 3px 4px)");

// All <basic-shape-rect> functions compute to the equivalent inset() function.
// Given "xywh(x y w h)", the equivalent function is
// "inset(y calc(100% - x - w) calc(100% - y - h) x)".
// https://drafts.csswg.org/css-shapes-1/#basic-shape-computed-values
// https://github.com/w3c/csswg-drafts/issues/9053
test_computed_value("clip-path", "xywh(0 1% 2px 0.5em)", "inset(1% calc(100% - 2px) calc(99% - 20px) 0px)");
test_computed_value("clip-path", "xywh(0px 1% 2px 0.5em round 0)", "inset(1% calc(100% - 2px) calc(99% - 20px) 0px)");
test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0 1px)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px)");
test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0px 1px 2em)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px 80px)");
test_computed_value("clip-path", "xywh(0px 1% 2px 3% round 0px 1px 2% 3px)", "inset(1% calc(100% - 2px) 96% 0px round 0px 1px 2% 3px)");
test_computed_value("clip-path", "xywh(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))", "inset(calc(1% + 1px) calc(98% - 2px) calc(96% - 4px) 0px)");
// Given "rect(t r b l)", the equivalent function is
// "inset(t calc(100% - r) calc(100% - b) l)".
test_computed_value("clip-path", "rect(auto auto auto auto)", "inset(0%)");
test_computed_value("clip-path", "rect(0 1% 2px 0.5em)", "inset(0px 99% calc(100% - 2px) 20px)");
test_computed_value("clip-path", "rect(0px 1% auto 0.5em round 0)", "inset(0px 99% 0% 20px)");
test_computed_value("clip-path", "rect(0px 1% auto 3% round 0 1px)", "inset(0px 99% 0% 3% round 0px 1px)");
test_computed_value("clip-path", "rect(0px 1% auto 3% round 0px 1px 2em)", "inset(0px 99% 0% 3% round 0px 1px 80px)");
test_computed_value("clip-path", "rect(0px 1% auto 3% round 0px 1px 2% 3px)", "inset(0px 99% 0% 3% round 0px 1px 2% 3px)");
test_computed_value("clip-path", "rect(calc(0px) calc(1px + 1%) calc(2px + 2%) calc(3px + 3%))", "inset(0px calc(99% - 1px) calc(98% - 2px) calc(3% + 3px))");
</script>
</body>
</html>