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<!DOCTYPE html>
<meta charset="UTF-8">
<title>column-rule-width interpolation</title>
<link rel="help" href="https://drafts.csswg.org/css-multicol-1/#crw">
<meta name="assert" content="column-rule-width supports animation by computed value type">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
.parent {
column-rule-width: 30px;
}
.target {
column-rule-width: 10px;
}
</style>
<body></body>
<script>
test_interpolation({
property: 'column-rule-width',
from: neutralKeyframe,
to: '20px',
}, [
{at: -0.3, expect: '7px'},
{at: 0, expect: '10px'},
{at: 0.3, expect: '13px'},
{at: 0.6, expect: '16px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '25px'},
]);
test_interpolation({
property: 'column-rule-width',
from: 'initial',
to: '20px',
}, [
{at: -0.3, expect: '0px'},
{at: 0, expect: '3px'},
{at: 0.3, expect: '8.1px'},
{at: 0.6, expect: '13.2px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '28.5px'},
]);
test_interpolation({
property: 'column-rule-width',
from: 'inherit',
to: '20px',
}, [
{at: -0.3, expect: '0px'},
{at: 0, expect: '0px'},
{at: 0.3, expect: '6px'},
{at: 0.6, expect: '12px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '30px'},
]);
test_interpolation({
property: 'column-rule-width',
from: 'unset',
to: '20px',
}, [
{at: -0.3, expect: '0px'},
{at: 0, expect: '3px'},
{at: 0.3, expect: '8.1px'},
{at: 0.6, expect: '13.2px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '28.5px'},
]);
test_interpolation({
property: 'column-rule-width',
from: '0px',
to: '10px'
}, [
{at: -0.3, expect: '0px'}, // CSS column-rule-width can't be negative.
{at: 0, expect: '0px'},
{at: 0.3, expect: '3px'},
{at: 0.6, expect: '6px'},
{at: 1, expect: '10px'},
{at: 1.5, expect: '15px'}
]);
test_interpolation({
property: 'column-rule-width',
from: '15px',
to: 'thick'
}, [
{at: -2, expect: '35px'},
{at: -0.3, expect: '18px'},
{at: 0, expect: '15px'},
{at: 0.3, expect: '12px'},
{at: 0.6, expect: '9px'},
{at: 1, expect: '5px'},
{at: 1.5, expect: '0px'}
]);
</script>
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