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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-conditional/container-queries/style-range-var-in-function-change.html - WPT Dashboard Interop Dashboard
<!doctype html>
<title>CSS Container Queries Test: style range query with var() inside a function changes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#container { --number: 1; }
#target { color: blue; }
@container style(mod(var(--number), 2) = 0) {
#target { color: green; }
}
</style>
<div id="container">
<div id="target"></div>
</div>
<script>
setup(() => assert_implements_style_container_queries());
const green = "rgb(0, 128, 0)";
const blue = "rgb(0, 0, 255)";
test(() => {
assert_equals(getComputedStyle(target).color, blue);
}, "Initially the query does not match");
test(() => {
container.style.setProperty("--number", "2");
assert_equals(getComputedStyle(target).color, green);
}, "Query matches after changing the custom property to an even number");
test(() => {
container.style.setProperty("--number", "3");
assert_equals(getComputedStyle(target).color, blue);
}, "Query stops matching after changing the custom property to an odd number");
</script>