<!DOCTYPE HTML>
<meta charset="utf-8">
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#dom-css-registerproperty" />
<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api/#supported-syntax-strings" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/utils.js"></script>
<script>

let assert_valid = test_initial_value_valid;
let assert_invalid = test_initial_value_invalid