Source code
Revision control
Copy as Markdown
Other Tools
Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-conditional/js/CSS-supports-L4.html - WPT Dashboard Interop Dashboard
<!doctype html>
<meta charset="utf-8">
<title>CSS.supports() Level 4</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(function() {
assert_equals(CSS.supports("selector(div)"), true);
}, "selector() function accepts a selector");
test(function() {
assert_equals(CSS.supports("selector(div, div)"), false);
}, "selector() function doesn't accept a selector list");
test(function() {
assert_equals(CSS.supports("selector(::-webkit-unknown-pseudo-element)"), false);
}, "selector() function rejects unknown webkit pseudo-elements.");
test(function() {
assert_equals(CSS.supports("selector(::before)"), true);
}, "selector() function accepts known pseudo-elements");
test(function() {
assert_equals(CSS.supports("selector(div + .c)"), true);
}, "selector() with simple combinators");
test(function() {
assert_equals(CSS.supports("selector(div | .c)"), false);
}, "selector() with unknown combinators");
test(function() {
assert_equals(CSS.supports("selector(:is(:foo))"), false);
}, "selector() with forgiving :is, 1 arg");
test(function() {
assert_equals(CSS.supports("selector(:is(:foo, div))"), false);
}, "selector() with forgiving :is, multiple args");
test(function() {
assert_equals(CSS.supports("selector(:where(:foo))"), false);
}, "selector() with forgiving :where, 1 arg");
test(function() {
assert_equals(CSS.supports("selector(:where(:foo, div))"), false);
}, "selector() with forgiving :where, multiple args");
test(function() {
assert_equals(CSS.supports("selector(:has(:foo))"), false);
}, "selector() with forgiving :has, 1 arg");
test(function() {
assert_equals(CSS.supports("selector(:has(:foo, div))"), false);
}, "selector() with forgiving :has, multiple args");
test(function() {
assert_equals(CSS.supports("selector(:nth-child(2n + 3 of :foo))"), false);
}, "selector() with unforgiving :nth-child, 1 arg");
test(function() {
assert_equals(CSS.supports("selector(:nth-last-child(2n + 3 of :foo))"), false);
}, "selector() with unforgiving :nth-last-child, 1 arg");
test(function() {
assert_equals(CSS.supports("selector(:nth-child(2n + 3 of :foo, div))"), false);
}, "selector() with unforgiving :nth-child, multiple args");
test(function() {
assert_equals(CSS.supports("selector(:nth-last-child(2n + 3 of :foo, div))"), false);
}, "selector() with unforgiving :nth-last-child, multiple args");
test(function() {
assert_equals(CSS.supports("selector(:nth-child(2n 4))"), false);
}, "selector() with a non-identifier after :nth-child's An+B index");
test(function() {
assert_equals(CSS.supports("selector(:nth-last-child(2n 4))"), false);
}, "selector() with a non-identifier after :nth-last-child's An+B index");
</script>