48 lines
1.8 KiB
HTML
48 lines
1.8 KiB
HTML
<!--quirks-->
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<title>Syntax quirks in @supports/CSS.supports</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel=help href=https://drafts.csswg.org/css-conditional/#at-supports>
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<link rel=help href=https://drafts.csswg.org/css-conditional/#the-css-interface>
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<link rel=help href=https://quirks.spec.whatwg.org/#the-hashless-hex-color-quirk>
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<link rel=help href=https://quirks.spec.whatwg.org/#the-unitless-length-quirk>
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<style>
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/* sanity check */
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@supports (background-color: lime) { #a { background-color: lime } }
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@supports (background-position: 1px 1px) { #a { background-position: 1px 1px } }
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/* test */
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@supports (background-color: 00ff00) { #b { background-color: 00ff00 } }
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@supports (background-position: 1 1) { #b { background-position: 1 1 } }
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</style>
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<div id=a></div>
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<div id=b></div>
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<div id=c></div> <!-- c unstyled -->
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<script>
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var a = document.getElementById('a');
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var b = document.getElementById('b');
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var c = document.getElementById('c');
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test(function() {
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assert_not_equals(getComputedStyle(a).backgroundColor, getComputedStyle(c).backgroundColor);
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}, 'Sanity check @supports color');
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test(function() {
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assert_equals(getComputedStyle(b).backgroundColor, getComputedStyle(a).backgroundColor);
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}, '@supports quirky color');
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test(function() {
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assert_false(CSS.supports('background-color', '00ff00'));
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}, 'CSS.supports() quirky color');
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test(function() {
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assert_not_equals(getComputedStyle(a).backgroundPosition, getComputedStyle(c).backgroundPosition);
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}, 'Sanity check @supports length');
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test(function() {
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assert_equals(getComputedStyle(b).backgroundPosition, getComputedStyle(a).backgroundPosition);
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}, '@supports quirky length');
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test(function() {
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assert_false(CSS.supports('background-position', '1 1'));
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}, 'CSS.supports() quirky length');
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</script>
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