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<!DOCTYPE html>
<meta charset="UTF-8">
<link rel="help" href="https://drafts.csswg.org/css-text-3/#letter-spacing-property">
<meta name="test" content="letter-spacing 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 {
letter-spacing: 2px;
}
.target {
font: 10px sans-serif;
font-weight: bold;
letter-spacing: 30px;
}
.expected {
color: green;
margin-right: 30px;
}
</style>
<body>
<template id="target-template">TT</template>
</body>
<script>
test_interpolation({
property: 'letter-spacing',
from: neutralKeyframe,
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: 'letter-spacing',
from: 'initial',
to: '20px',
}, [
{at: -0.3, expect: '-6px'},
{at: 0, expect: 'normal'},
{at: 0.3, expect: '6px'},
{at: 0.6, expect: '12px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '30px'},
]);
test_interpolation({
property: 'letter-spacing',
from: 'inherit',
to: '20px',
}, [
{at: -0.3, expect: '-3.4px'},
{at: 0, expect: '2px'},
{at: 0.3, expect: '7.4px'},
{at: 0.6, expect: '12.8px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '29px'},
]);
test_interpolation({
property: 'letter-spacing',
from: 'unset',
to: '20px',
}, [
{at: -0.3, expect: '-3.4px'},
{at: 0, expect: '2px'},
{at: 0.3, expect: '7.4px'},
{at: 0.6, expect: '12.8px'},
{at: 1, expect: '20px'},
{at: 1.5, expect: '29px'},
]);
test_interpolation({
property: 'letter-spacing',
from: '-10px',
to: '10px',
}, [
{at: -0.3, expect: '-16px'},
{at: 0, expect: '-10px'},
{at: 0.3, expect: '-4px'},
{at: 0.6, expect: '2px'},
{at: 1, expect: '10px'},
{at: 1.5, expect: '20px'},
]);
test_interpolation({
property: 'letter-spacing',
from: 'normal',
to: '10px',
}, [
{at: -0.3, expect: '-3px'},
{at: 0, expect: 'normal'},
{at: 0.3, expect: '3px'},
{at: 0.6, expect: '6px'},
{at: 1, expect: '10px'},
{at: 1.5, expect: '15px'},
]);
</script>
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