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<!doctype html>
<title>Insert color-scheme meta tags</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/semantics.html#meta-color-scheme">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/compute-root-color-scheme.js"></script>
<!--
NOTE: This test assumes that the browser's default color-scheme is "light",
see https://github.com/web-platform-tests/wpt/pull/31268 for reasoning
-->
<script>
function createMeta(content) {
const meta = document.createElement("meta");
meta.setAttribute("name", "color-scheme");
meta.setAttribute("content", content);
return meta;
}
assert_root_color_scheme("light", "Initial color-scheme");
document.head.appendChild(createMeta("dark"));
assert_root_color_scheme("dark", "Inserted meta color-scheme applies");
document.head.insertBefore(createMeta("light"), document.head.lastChild);
assert_root_color_scheme("light", "Inserted meta color-scheme before existing in head applies");
</script>
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