wpt/css/css-backgrounds/animations/background-color-interpolation.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<meta charset="UTF-8">
<link rel="help" href="https://un5n798jx6qx6j0rmf2verhh.julianrbryant.com/css-backgrounds-3/#background-color">
<meta name="test" content="background-color supports animation as a <color>">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>

<style>
.parent {
  background-color: #eee;
}
.target {
  width: 60px;
  height: 60px;
  display: inline-block;
  border: 2px solid black;
  margin-right: 2px;
  color: rgba(0, 0, 255, 0.5);
  background-color: black;
}
.expected {
  margin-right: 15px;
}
</style>

<body></body>

<script>
test_interpolation({
  property: 'background-color',
  from: neutralKeyframe,
  to: 'green',
}, [
  {at: -0.3, expect: 'rgb(0, 0, 0)'},
  {at: 0, expect: 'rgb(0, 0, 0)'},
  {at: 0.3, expect: 'rgb(0, 38, 0)'},
  {at: 0.6, expect: 'rgb(0, 77, 0)'},
  {at: 1, expect: 'rgb(0, 128, 0)'},
  {at: 1.5, expect: 'rgb(0, 192, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'initial',
  to: 'green',
}, [
  {at: -0.3, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0.3, expect: 'rgba(0, 128, 0, 0.3)'},
  {at: 0.6, expect: 'rgba(0, 128, 0, 0.6)'},
  {at: 1, expect: 'rgb(0, 128, 0)'},
  {at: 1.5, expect: 'rgb(0, 192, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'inherit',
  to: 'green',
}, [
  {at: -0.3, expect: 'rgb(255, 255, 255)'},
  {at: 0, expect: 'rgb(238, 238, 238)'},
  {at: 0.3, expect: 'rgb(167, 205, 167)'},
  {at: 0.6, expect: 'rgb(95, 172, 95)'},
  {at: 1, expect: 'rgb(0, 128, 0)'},
  {at: 1.5, expect: 'rgb(0, 73, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'unset',
  to: 'green',
}, [
  {at: -0.3, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0.3, expect: 'rgba(0, 128, 0, 0.3)'},
  {at: 0.6, expect: 'rgba(0, 128, 0, 0.6)'},
  {at: 1, expect: 'rgb(0, 128, 0)'},
  {at: 1.5, expect: 'rgb(0, 192, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'white',
  to: 'orange',
}, [
  {at: -0.3, expect: 'white'},
  {at: 0, expect: 'white'},
  {at: 0.3, expect: 'rgb(255, 228, 179)'},
  {at: 0.6, expect: 'rgb(255, 201, 102)'},
  {at: 1, expect: 'orange'},
  {at: 1.5, expect: 'rgb(255, 120, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'transparent',
  to: 'green',
}, [
  {at: -0.3, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0, expect: 'rgba(0, 0, 0, 0)'},
  {at: 0.3, expect: 'rgba(0, 128, 0, 0.3)'},
  {at: 0.6, expect: 'rgba(0, 128, 0, 0.6)'},
  {at: 1, expect: 'rgb(0, 128, 0)'},
  {at: 1.5, expect: 'rgb(0, 192, 0)'},
]);

test_interpolation({
  property: 'background-color',
  from: 'currentcolor',
  to: 'rgba(0, 255, 0, 0.75)',
}, [
  {at: -0.5, expect: 'rgba(0, 0, 255, 0.38)'},
  {at: 0, expect: 'rgba(0, 0, 255, 0.5)'},
  {at: 0.25, expect: 'rgba(0, 85, 170, 0.56)'},
  {at: 0.5, expect: 'rgba(0, 153, 102, 0.63)'},
  {at: 0.75, expect: 'rgba(0, 208, 47, 0.69)'},
  {at: 1, expect: 'rgba(0, 255, 0, 0.75)'},
  {at: 1.5, expect: 'rgba(0, 255, 0, 0.88)'},
]);
</script>