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<!DOCTYPE html>
<title>Custom Media Queries Parsing</title>
<link rel="help" href="https://www.w3.org/TR/mediaqueries-5/#custom-mq">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
function test_valid(rule) {
test(() => {
let s = new CSSStyleSheet();
s.replaceSync(`${rule}`);
assert_equals(s.cssRules.length, 1);
}, `${rule} is valid`);
}
function test_invalid(rule) {
test(() => {
let s = new CSSStyleSheet();
s.replaceSync(`${rule}`);
assert_equals(s.cssRules.length, 0);
}, `${rule} is invalid`);
}
test_valid('@custom-media --query (max-width: 30em)');
test_valid('@custom-media --query (color), (hover)');
test_valid('@custom-media --query not all and (hover: hover)');
test_valid('@custom-media --query true');
test_valid('@custom-media --query false');
test_valid('@custom-media -- true');
test_valid('@custom-media --foo/* */(width > 42px)');
test_invalid('@custom-media query ()');
test_invalid('@custom-media query (max-width: 30em)');
test_invalid('@custom-media --query(max-width: 30em)');
test_invalid('@custom-media --query(max-width: 30em) !');
test_invalid('@custom-media -query(max-width: 30em)');
test_invalid('@custom-media --query true!');
test_invalid('@custom-media --query false true');
</script>
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