registered-property-change-style-001.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-properties-values-api/registered-property-change-style-001.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Variables Test: Style changes on registered properties using variables</title>

<link rel="author" title="Javier Fernandez Garcia-Boente" href="mailto:jfernandez@igalia.com">

<link rel="help" href="http://www.w3.org/TR/css-variables-1/#using-variables">

<meta name="assert" content="A change in the custom property declaration must be propagated to all the descendants">

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

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

<div id="outer">

    <div id="inbetween">

        <div id="inner"></div>

    </div>

</div>

<script>

    "use strict";

    test( function () {

        outer.style.cssText = '';

        inbetween.style.cssText = '';

        inner.style.cssText = 'color: var(--color1)';

        let initialValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(initialValue, "rgb(0, 0, 0)", "Initial value");

        inbetween.style.cssText = 'color: green';

        let inheritedValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(inheritedValue, "rgb(0, 128, 0)", "Inherited value");

        CSS.registerProperty({name: '--color1', syntax: '<color>', initialValue: 'red', inherits: true});

        let actualValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(actualValue, "rgb(255, 0, 0)", "Resolved value");

    }, "New registered property declaration");

    test( function () {

        outer.style.cssText = '';

        inbetween.style.cssText = '';

        inner.style.cssText = 'color: var(--color2)';

        let initialValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(initialValue, "rgb(0, 0, 0)", "Initial value");

        outer.style.cssText = '--color2: blue';

        inbetween.style.cssText = 'color: green';

        let resolvedValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(resolvedValue, "rgb(0, 0, 255)", "Resolved value");

        outer.style.cssText = '';

        CSS.registerProperty({name: '--color2', syntax: '<color>', initialValue: 'red', inherits: true});

        let actualValue = getComputedStyle(inner).getPropertyValue('color');

        assert_equals(actualValue, "rgb(255, 0, 0)", "Resolved value");

    }, "Registered property overrides a previous declaration ");

</script>