cssstyledeclaration-custom-properties.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/cssstyledeclaration-custom-properties.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>CSS Test: computed style declaration includes custom properties.</title>

<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">

<link rel="author" href="https://mozilla.org" title="Mozilla">

<link rel="help" href="https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle">

<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/1316">

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

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

<div style="--foo:bar"></div>

<div></div>

<script>

  test(function() {

    let withCustom = getComputedStyle(document.querySelector("div"));

    let withoutCustom = getComputedStyle(document.querySelector("div + div"));

    assert_equals(withCustom.getPropertyValue("--foo"), "bar", "Should be returned from getPropertyValue");

    assert_equals(withCustom.length, withoutCustom.length + 1, "Should show up in .length");

    assert_equals(withCustom[withCustom.length - 1], "--foo", "Should be after all the non-custom properties");

  }, "Custom properties are included in computed style");

</script>