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<!doctype html>
<title>@container: inner at-rules</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>
<style>
#container {
container-type: size;
width: 100px;
height: 100px;
}
</style>
<div id=container>
<div id=child></div>
</div>
<script>
setup(() => assert_implements_container_queries());
</script>
<style>
@container (width: 100px) {
@keyframes anim1 {
from { --anim1:true; }
to { --anim1:true; }
}
}
@container (width: 200px) {
@keyframes anim2 {
from { --anim2:true; }
to { --anim2:true; }
}
}
#child { animation: anim1 10s paused, anim2 10s paused; }
</style>
<script>
test(() => {
assert_equals(getComputedStyle(child).getPropertyValue('--anim1'), 'true');
assert_equals(getComputedStyle(child).getPropertyValue('--anim2'), 'true');
}, '@keyframes is defined regardless of evaluation');
</script>
<style>
@container (width: 100px) {
@property --prop1 {
syntax: "<length>";
inherits: false;
initial-value: 0px;
}
}
@container (width: 200px) {
@property --prop2 {
syntax: "<length>";
inherits: false;
initial-value: 0px;
}
}
#child {
font-size: 20px;
--prop1:1em;
--prop2:2em;
}
</style>
<script>
test(() => {
assert_equals(getComputedStyle(child).getPropertyValue('--prop1'), '20px');
assert_equals(getComputedStyle(child).getPropertyValue('--prop2'), '40px');
}, '@property is defined regardless of evaluation');
</script>
<style>
@container (width: 100px) {
@layer a;
}
@container (width: 200px) {
@layer b;
}
@layer b {
#child { --layer:b; }
}
@layer a {
#child { --layer:a; }
}
</style>
<script>
test(() => {
assert_equals(getComputedStyle(child).getPropertyValue('--layer'), 'b');
}, '@layer order respected regardless of evaluation');
</script>
<style>
@container (width: 100px) {
@font-face {
font-family: Font1;
font-stretch: 50% 200%;
src: url(/fonts/Ahem.ttf);
}
}
@container (width: 200px) {
@font-face {
font-family: Font2;
font-stretch: 40% 190%;
src: url(/fonts/Ahem.ttf);
}
}
</style>
<script>
promise_test(async (t) => {
const fonts1 = await document.fonts.load("20px Font1");
assert_not_equals(fonts1[0], undefined);
assert_equals(fonts1[0].stretch, "50% 200%");
const fonts2 = await document.fonts.load("20px Font2");
assert_not_equals(fonts2[0], undefined);
assert_equals(fonts2[0].stretch, "40% 190%");
}, '@font-face is defined regardless of evaluation');
</script>
<style>
@container (width: 100px) {
/* Assumed to be false */
@media (width: 0px) {
#child { --media1:true; }
}
/* Assumed to be true */
@media (min-width: 0px) {
#child { --media2:true; }
}
}
/* Same again, but with failing container query. */
@container (width: 200px) {
@media (width: 0px) {
#child { --media3:true; }
}
@media (min-width: 0px) {
#child { --media4:true; }
}
}
</style>
<script>
test(() => {
assert_equals(getComputedStyle(child).getPropertyValue('--media1'), '');
assert_equals(getComputedStyle(child).getPropertyValue('--media2'), 'true');
assert_equals(getComputedStyle(child).getPropertyValue('--media3'), '');
assert_equals(getComputedStyle(child).getPropertyValue('--media4'), '');
}, '@media works inside @container');
</script>
<style>
@container (width: 100px) {
@supports (width: 500kg) {
#child { --supports1:true; }
}
@supports (width: 500px) {
#child { --supports2:true; }
}
}
/* Same again, but with failing container query. */
@container (width: 200px) {
@supports (width: 500kg) {
#child { --supports3:true; }
}
@supports (width: 500px) {
#child { --supports4:true; }
}
}
</style>
<script>
test(() => {
assert_equals(getComputedStyle(child).getPropertyValue('--supports1'), '');
assert_equals(getComputedStyle(child).getPropertyValue('--supports2'), 'true');
assert_equals(getComputedStyle(child).getPropertyValue('--supports3'), '');
assert_equals(getComputedStyle(child).getPropertyValue('--supports4'), '');
}, '@supports works inside @container');
</script>
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