custom-property-animation-inherited-used-by-standard-property.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-properties-values-api/animation/custom-property-animation-inherited-used-by-standard-property.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="../resources/utils.js"></script>

<div id="container">

    <div id="target"></div>

</div>

<script>

test(() => {

  CSS.registerProperty({

    name: "--my-length",

    syntax: "<length>",

    inherits: true,

    initialValue: "0px"

});

  target.style.marginLeft = "var(--my-length)";

  const duration = 1000;

  const animation = container.animate({ "--my-length": "100px" }, duration);

  animation.pause();

  animation.currentTime = duration / 4;

  assert_equals(getComputedStyle(target).marginLeft, "25px");

}, "Animating an inherited CSS variable on a parent is reflected on a standard property using that variable as a value on a child");

</script>