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<!DOCTYPE html>
<meta charset="UTF-8">
<link rel="help" href="https://drafts.csswg.org/css-images-3/#the-object-position">
<meta name="test" content="object-position supports animation">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<body></body>
<script>
// Default object-position value is 50% 50%
test_interpolation({
property: 'object-position',
from: neutralKeyframe,
to: 'left top',
}, [
{ at: -0.25, expect: '62.5% 62.5%' },
{ at: 0, expect: '50% 50%' },
{ at: 0.25, expect: '37.5% 37.5%' },
{ at: 0.5, expect: '25% 25%' },
{ at: 0.75, expect: '12.5% 12.5%' },
{ at: 1, expect: '0% 0%' },
{ at: 1.25, expect: '-12.5% -12.5%' },
]);
// Animate x axis
test_interpolation({
property: 'object-position',
from: 'initial',
to: 'center top',
}, [
{ at: -0.25, expect: '50% 62.5%' },
{ at: 0, expect: '50% 50%' },
{ at: 0.25, expect: '50% 37.5%' },
{ at: 0.5, expect: '50% 25%' },
{ at: 0.75, expect: '50% 12.5%' },
{ at: 1, expect: '50% 0%' },
{ at: 1.25, expect: '50% -12.5%' },
]);
// Animate y axis
test_interpolation({
property: 'object-position',
from: 'initial',
to: 'left center',
}, [
{ at: -0.25, expect: '62.5% 50%' },
{ at: 0, expect: '50% 50%' },
{ at: 0.25, expect: '37.5% 50%' },
{ at: 0.5, expect: '25% 50%' },
{ at: 0.75, expect: '12.5% 50%' },
{ at: 1, expect: '0% 50%' },
{ at: 1.25, expect: '-12.5% 50%' },
]);
// Pixel values
test_interpolation({
property: 'object-position',
from: '20px 20px',
to: '100px 100px',
}, [
{ at: -0.25, expect: '0px 0px' },
{ at: 0, expect: '20px 20px' },
{ at: 0.25, expect: '40px 40px' },
{ at: 0.5, expect: '60px 60px' },
{ at: 0.75, expect: '80px 80px' },
{ at: 1, expect: '100px 100px' },
{ at: 1.25, expect: '120px 120px' },
]);
</script>
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