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<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<link rel=help href="https://drafts.csswg.org/css-position-4/#overlay">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>
<body>
<script>
const alwaysAuto = [
{at: -1, expect: 'auto'},
{at: 0, expect: 'auto'},
{at: 0.1, expect: 'auto'},
{at: 0.9, expect: 'auto'},
{at: 1, expect: 'auto'},
{at: 1.5, expect: 'auto'},
];
const alwaysNone = [
{at: -1, expect: 'none'},
{at: 0, expect: 'none'},
{at: 0.1, expect: 'none'},
{at: 0.9, expect: 'none'},
{at: 1, expect: 'none'},
{at: 1.5, expect: 'none'},
];
test_interpolation({
property: 'overlay',
from: 'auto',
to: 'none',
// transition:all is not supposed to allow overlay to be transitioned.
'CSS Transitions with transition: all': alwaysNone,
}, [
{at: -1, expect: 'auto'},
{at: 0, expect: 'auto'},
{at: 0.1, expect: 'auto'},
{at: 0.9, expect: 'auto'},
{at: 1, expect: 'none'},
{at: 1.5, expect: 'none'},
]);
test_interpolation({
property: 'overlay',
from: 'none',
to: 'auto',
// transition:all is not supposed to allow overlay to be transitioned.
'CSS Transitions with transition: all': alwaysAuto,
}, [
{at: -1, expect: 'none'},
{at: 0, expect: 'none'},
{at: 0.1, expect: 'auto'},
{at: 0.9, expect: 'auto'},
{at: 1, expect: 'auto'},
{at: 1.5, expect: 'auto'},
]);
test_interpolation({
property: 'overlay',
from: 'auto',
to: 'auto'
}, [
{at: -1, expect: 'auto'},
{at: 0, expect: 'auto'},
{at: 0.5, expect: 'auto'},
{at: 1, expect: 'auto'},
{at: 1.5, expect: 'auto'},
]);
test_interpolation({
property: 'overlay',
from: 'none',
to: 'none'
}, [
{at: -1, expect: 'none'},
{at: 0, expect: 'none'},
{at: 0.5, expect: 'none'},
{at: 1, expect: 'none'},
{at: 1.5, expect: 'none'},
]);
</script>
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