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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/CSS2/linebox/animations/line-height-interpolation.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<meta charset="UTF-8">
<title>line-height interpolation</title>
<meta name="assert" content="line-height supports animation by computation">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<style>
.parent {
line-height: 30px;
}
.target {
display: inline-block;
font: 20px sans-serif;
line-height: 10px;
}
.expected {
color: green;
margin-right: 30px;
}
</style>
<body>
<template id="target-template">
<p>
v<br />v
</p>
</template>
</body>
<script>
test_interpolation({
property: 'line-height',
from: neutralKeyframe,
to: '20px',
}, [
{at: -1, expect: '0px'},
{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_no_interpolation({
property: 'line-height',
from: 'initial',
to: '20px',
});
test_interpolation({
property: 'line-height',
from: 'inherit',
to: '20px',
}, [
{at: -1, expect: '40px'},
{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: 'line-height',
from: 'unset',
to: '20px',
}, [
{at: -1, expect: '40px'},
{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: 'line-height',
from: '4',
to: '14',
}, [
{at: -1, expect: '0'},
{at: -0.3, expect: '1'},
{at: 0, expect: '4'},
{at: 0.3, expect: '7'},
{at: 0.6, expect: '10'},
{at: 1, expect: '14'},
{at: 1.5, expect: '19'},
]);
test_interpolation({
property: 'line-height',
from: '4px',
to: '14px',
}, [
{at: -1, expect: '0px'},
{at: -0.3, expect: '1px'},
{at: 0, expect: '4px'},
{at: 0.3, expect: '7px'},
{at: 0.6, expect: '10px'},
{at: 1, expect: '14px'},
{at: 1.5, expect: '19px'},
]);
test_interpolation({
property: 'line-height',
from: 'normal',
to: 'normal',
}, [
{at: -0.3, expect: 'normal'},
{at: 0, expect: 'normal'},
{at: 0.3, expect: 'normal'},
{at: 0.6, expect: 'normal'},
{at: 1, expect: 'normal'},
{at: 1.5, expect: 'normal'},
]);
test_no_interpolation({
property: 'line-height',
from: '4',
to: '14px',
});
test_no_interpolation({
property: 'line-height',
from: '14px',
to: 'normal',
});
test_no_interpolation({
property: 'line-height',
from: 'normal',
to: '4',
});
test_no_interpolation({
property: 'line-height',
from: '4',
to: 'normal',
});
test_no_interpolation({
property: 'line-height',
from: 'normal',
to: '14px',
});
test_no_interpolation({
property: 'line-height',
from: '14px',
to: '4',
});
test_no_interpolation({
property: 'line-height',
from: '4',
to: '14q',
});
test_interpolation({
property: 'line-height',
from: '4q',
to: '14q',
}, [
{at: -1, expect: '0q'},
{at: -0.3, expect: '1q'},
{at: 0, expect: '4q'},
{at: 0.3, expect: '7q'},
{at: 0.6, expect: '10q'},
{at: 1, expect: '14q'},
{at: 1.5, expect: '19q'},
]);
test_no_interpolation({
property: 'line-height',
from: '14q',
to: 'normal',
});
</script>