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<!DOCTYPE html>
<meta charset="UTF-8">
<title>outline-width interpolation</title>
<link rel="help" href="https://drafts.csswg.org/css-ui-3/#outline-width">
<meta name="assert" content="outline-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>
.parent {
outline: solid transparent;
outline-width: 30px;
}
.target {
width: 50px;
height: 50px;
background-color: black;
display: inline-block;
margin: 18px;
outline: solid orange;
outline-width: 10px;
opacity: 0.5;
}
.expected {
background-color: green;
}
</style>
<body></body>
<script>
// NOTE: The below tests make assumptions about the values of medium (for unset
// and initial) and thick, namely that:
// * medium=3px
// * thick=3px
//
// A better version of these tests would dynamically generate the expected values
// by querying the computed style from the UA.
test_interpolation({
property: 'outline-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: 'outline-width',
from: 'initial',
to: '23px',
}, [
{at: -0.3, expect: '0px'},
{at: 0, expect: '3px'},
{at: 0.3, expect: '9px'},
{at: 0.6, expect: '15px'},
{at: 1, expect: '23px'},
{at: 1.5, expect: '33px'},
]);
test_interpolation({
property: 'outline-width',
from: 'inherit',
to: '20px',
}, [
{at: -0.3, expect: '33px'},
{at: 0, expect: '30px'},
{at: 0.3, expect: '27px'},
{at: 0.6, expect: '24px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '15px'},
]);
test_interpolation({
property: 'outline-width',
from: 'unset',
to: '23px',
}, [
{at: -0.3, expect: '0px'},
{at: 0, expect: '3px'},
{at: 0.3, expect: '9px'},
{at: 0.6, expect: '15px'},
{at: 1, expect: '23px'},
{at: 1.5, expect: '33px'},
]);
test_interpolation({
property: 'outline-width',
from: '0px',
to: '10px',
}, [
{at: -0.3, expect: '0px'}, // CSS outline-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: 'outline-width',
from: 'thick',
to: '15px',
}, [
{at: -2, expect: '0px'}, // CSS outline-width can't be negative.
{at: -0.3, expect: '2px'},
{at: 0, expect: '5px'},
{at: 0.3, expect: '8px'},
{at: 0.6, expect: '11px'},
{at: 1, expect: '15px'},
{at: 1.5, expect: '20px'}
]);
</script>
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