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43 lines
1.2 KiB
HTML
43 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<link rel="help" href="https://drafts.css-houdini.org/css-properties-values-api-1/#conditional-rules">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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CSS.registerProperty({
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name: '--length',
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syntax: '<length>',
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initialValue: '0px',
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inherits: false
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});
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</script>
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<style>
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#target { color: red; }
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@supports(--length: green) {
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#target { color: rgb(1, 2, 3); }
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}
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</style>
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<div id=target></div>
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<script>
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test(function() {
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let cs = getComputedStyle(target);
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assert_equals(cs.getPropertyValue('color'), 'rgb(1, 2, 3)');
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}, '@supports should ignore registered syntax');
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test(function() {
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assert_true(CSS.supports('--length: red'));
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assert_true(CSS.supports('--length: 10px'));
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assert_true(CSS.supports('--length: anything, really'));
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}, 'CSS.supports(conditionText) should ignore registered syntax');
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test(function() {
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assert_true(CSS.supports('--length', 'red'));
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assert_true(CSS.supports('--length', '10px'));
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assert_true(CSS.supports('--length', ' anything, really'));
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}, 'CSS.supports(property, value) should ignore registered syntax');
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</script>
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