wpt / css / css-sizing / animation / width-composition.html

Status: FAIL | Duration: 200ms | Subtests: 7/60 | Open test on wpt.live | wpt.fyi

TestTest SourceSubtests (7/60)

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

SubtestStatusMessage
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to add [200px] at (-0.3) should be [120px]FAILassert_equals: expected "120px " but got "70px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to add [200px] at (0) should be [150px]FAILassert_equals: expected "150px " but got "100px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to add [200px] at (0.5) should be [200px]FAILassert_equals: expected "200px " but got "150px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to add [200px] at (1) should be [250px]FAILassert_equals: expected "250px " but got "200px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to add [200px] at (1.5) should be [300px]FAILassert_equals: expected "300px " but got "250px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to add [200px] at (-0.3) should be [120px]FAILassert_equals: expected "120px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to add [200px] at (0) should be [150px]FAILassert_equals: expected "150px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to add [200px] at (0.5) should be [200px]FAILassert_equals: expected "200px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to add [200px] at (1) should be [250px]FAILassert_equals: expected "250px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to add [200px] at (1.5) should be [300px]FAILassert_equals: expected "300px " but got "50px "
Compositing CSS Animations: property <width> underlying [100px] from add [10px] to add [2px] at (-0.5) should be [114px]FAILassert_equals: expected "114px " but got "14px "
Compositing CSS Animations: property <width> underlying [100px] from add [10px] to add [2px] at (0) should be [110px]FAILassert_equals: expected "110px " but got "10px "
Compositing CSS Animations: property <width> underlying [100px] from add [10px] to add [2px] at (0.5) should be [106px]FAILassert_equals: expected "106px " but got "6px "
Compositing CSS Animations: property <width> underlying [100px] from add [10px] to add [2px] at (1) should be [102px]FAILassert_equals: expected "102px " but got "2px "
Compositing CSS Animations: property <width> underlying [100px] from add [10px] to add [2px] at (1.5) should be [98px]FAILassert_equals: expected "98px " but got "0px "
Compositing Web Animations: property <width> underlying [100px] from add [10px] to add [2px] at (-0.5) should be [114px]FAILassert_equals: expected "114px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [10px] to add [2px] at (0) should be [110px]FAILassert_equals: expected "110px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [10px] to add [2px] at (0.5) should be [106px]FAILassert_equals: expected "106px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [10px] to add [2px] at (1) should be [102px]FAILassert_equals: expected "102px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [10px] to add [2px] at (1.5) should be [98px]FAILassert_equals: expected "98px " but got "100px "
Compositing CSS Animations: property <width> underlying [10%] from add [100px] to add [20%] at (-0.3) should be [calc(130px + 4%)]FAILassert_equals: expected "161px " but got "83px "
Compositing CSS Animations: property <width> underlying [10%] from add [100px] to add [20%] at (0) should be [calc(100px + 10%)]FAILassert_equals: expected "178px " but got "100px "
Compositing CSS Animations: property <width> underlying [10%] from add [100px] to add [20%] at (0.5) should be [calc(50px + 20%)]FAILassert_equals: expected "207px " but got "128px "
Compositing CSS Animations: property <width> underlying [10%] from add [100px] to add [20%] at (1) should be [30%]FAILassert_equals: expected "235px " but got "157px "
Compositing CSS Animations: property <width> underlying [10%] from add [100px] to add [20%] at (1.5) should be [calc(-50px + 40%)]FAILassert_equals: expected "264px " but got "185px "
Compositing Web Animations: property <width> underlying [10%] from add [100px] to add [20%] at (-0.3) should be [calc(130px + 4%)]FAILassert_equals: expected "161px " but got "78px "
Compositing Web Animations: property <width> underlying [10%] from add [100px] to add [20%] at (0) should be [calc(100px + 10%)]FAILassert_equals: expected "178px " but got "78px "
Compositing Web Animations: property <width> underlying [10%] from add [100px] to add [20%] at (0.5) should be [calc(50px + 20%)]FAILassert_equals: expected "207px " but got "78px "
Compositing Web Animations: property <width> underlying [10%] from add [100px] to add [20%] at (1) should be [30%]FAILassert_equals: expected "235px " but got "78px "
Compositing Web Animations: property <width> underlying [10%] from add [100px] to add [20%] at (1.5) should be [calc(-50px + 40%)]FAILassert_equals: expected "264px " but got "78px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (-0.3) should be [135px]FAILassert_equals: expected "135px " but got "70px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (0) should be [150px]FAILassert_equals: expected "150px " but got "100px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (0.5) should be [175px]FAILassert_equals: expected "175px " but got "150px "
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (1) should be [200px]PASS
Compositing CSS Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (1.5) should be [225px]FAILassert_equals: expected "225px " but got "250px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (-0.3) should be [135px]FAILassert_equals: expected "135px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (0) should be [150px]FAILassert_equals: expected "150px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (0.5) should be [175px]FAILassert_equals: expected "175px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (1) should be [200px]FAILassert_equals: expected "200px " but got "50px "
Compositing Web Animations: property <width> underlying [50px] from add [100px] to replace [200px] at (1.5) should be [225px]FAILassert_equals: expected "225px " but got "50px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [auto] at (-0.3) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [auto] at (0) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [auto] at (0.5) should be [auto]PASS
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [auto] at (1) should be [auto]PASS
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [auto] at (1.5) should be [auto]PASS
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [auto] at (-0.3) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [auto] at (0) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [auto] at (0.5) should be [auto]FAILassert_equals: expected "784px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [auto] at (1) should be [auto]FAILassert_equals: expected "784px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [auto] at (1.5) should be [auto]FAILassert_equals: expected "784px " but got "100px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (-0.3) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (0) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (0.5) should be [75px]PASS
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (1) should be [75px]PASS
Compositing CSS Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (1.5) should be [75px]PASS
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (-0.3) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (0) should be [200px]FAILassert_equals: expected "200px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (0.5) should be [75px]FAILassert_equals: expected "75px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (1) should be [75px]FAILassert_equals: expected "75px " but got "100px "
Compositing Web Animations: property <width> underlying [100px] from add [100px] to add [min-content] at (1.5) should be [75px]FAILassert_equals: expected "75px " but got "100px "

/css/css-sizing/animation/width-composition.html

<!DOCTYPE html>
<meta charset="UTF-8">
<title>width composition</title>
<link rel="help" href="https://drafts.csswg.org/css-sizing-3/#propdef-width">
<meta name="assert" content="width supports animation by computed value">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
.target::before {
  display: block;
  content: "";
  width: 75px;
  height: 125px;
}
</style>

<body>
<script>
test_composition({
  property: 'width',
  underlying: '50px',
  addFrom: '100px',
  addTo: '200px',
}, [
  {at: -0.3, expect: '120px'},
  {at: 0, expect: '150px'},
  {at: 0.5, expect: '200px'},
  {at: 1, expect: '250px'},
  {at: 1.5, expect: '300px'},
]);

test_composition({
  property: 'width',
  underlying: '100px',
  addFrom: '10px',
  addTo: '2px',
}, [
  {at: -0.5, expect: '114px'},
  {at: 0, expect: '110px'},
  {at: 0.5, expect: '106px'},
  {at: 1, expect: '102px'},
  {at: 1.5, expect: '98px'}, // Value clamping should happen after composition.
]);

test_composition({
  property: 'width',
  underlying: '10%',
  addFrom: '100px',
  addTo: '20%',
}, [
  {at: -0.3, expect: 'calc(130px + 4%)'},
  {at: 0, expect: 'calc(100px + 10%)'},
  {at: 0.5, expect: 'calc(50px + 20%)'},
  {at: 1, expect: '30%'},
  {at: 1.5, expect: 'calc(-50px + 40%)'},
]);

test_composition({
  property: 'width',
  underlying: '50px',
  addFrom: '100px',
  replaceTo: '200px',
}, [
  {at: -0.3, expect: '135px'},
  {at: 0, expect: '150px'},
  {at: 0.5, expect: '175px'},
  {at: 1, expect: '200px'},
  {at: 1.5, expect: '225px'},
]);

test_composition({
  property: 'width',
  underlying: '100px',
  addFrom: '100px',
  addTo: 'auto',
}, [
  {at: -0.3, expect: '200px'},
  {at: 0, expect: '200px'},
  {at: 0.5, expect: 'auto'},
  {at: 1, expect: 'auto'},
  {at: 1.5, expect: 'auto'},
]);

test_composition({
  property: 'width',
  underlying: '100px',
  addFrom: '100px',
  addTo: 'min-content', /* 75px, not compatible */
}, [
  {at: -0.3, expect: '200px'},
  {at: 0, expect: '200px'},
  {at: 0.5, expect: '75px'},
  {at: 1, expect: '75px'},
  {at: 1.5, expect: '75px'},
]);
</script>
</body>
</script>
</body>