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<!doctype html>
<title>@container: style queries parsing</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-rule">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<div style="container-name:name">
<main id="main"></main>
</div>
<script>
setup(() => assert_implements_container_queries());
function cleanup_main() {
while (main.firstChild)
main.firstChild.remove();
}
function set_style(text) {
let style = document.createElement('style');
style.innerText = text;
main.append(style);
return style;
}
function test_rule_valid(query) {
test(t => {
t.add_cleanup(cleanup_main);
let style = set_style(`@container ${query} {}`);
assert_equals(style.sheet.rules.length, 1);
}, query);
}
function test_condition_invalid(condition) {
test(t => {
t.add_cleanup(cleanup_main);
let style = set_style(`@container name ${condition} {}`);
assert_equals(style.sheet.rules.length, 0);
}, condition);
}
// Tests that 1) the condition parses, and 2) is either "unknown" or not, as
// specified.
function test_condition_valid(condition, unknown) {
test(t => {
t.add_cleanup(cleanup_main);
let style = set_style(`
@container name ${condition} {}
@container name (${condition}) or (not (${condition})) { main { --match:true; } }
`);
assert_equals(style.sheet.rules.length, 2);
const expected = unknown ? '' : 'true';
assert_equals(getComputedStyle(main).getPropertyValue('--match'), expected);
}, condition);
}
function test_condition_known(condition) {
test_condition_valid(condition, false /* unknown */);
}
function test_condition_unknown(condition) {
test_condition_valid(condition, true /* unknown */);
}
test_condition_known('style(--my-prop: foo)');
test_condition_known('style(--my-prop: foo - bar ())');
test_condition_known('style(not ((--foo: calc(10px + 2em)) and ((--foo: url(x)))))');
test_condition_known('style((--foo: bar) or (--bar: 10px))');
test_condition_known('style(--my-prop:)');
test_condition_known('style(--my-prop: )');
test_condition_known('style(--foo: bar !important)');
test_condition_known('style(--foo)');
test_condition_unknown('style(--foo: bar;)');
test_condition_unknown('style(style(--foo: bar))');
</script>
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