58 lines
1.5 KiB
HTML
58 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<meta charset="UTF-8">
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<title>CSS Conditional Test: Custom Properties in @supports</title>
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<meta name="assert"
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content="Test passes if custom properties are supported and correctly detected in @supports,
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or unsupported and correctly detected in @supports.">
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<link rel="help" href="https://www.w3.org/TR/css3-conditional/#at-supports">
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<link rel="help" href="https://www.w3.org/TR/css-variables-1/">
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<link rel="author" title="Elika J. Etemad" href="http://fantasai.inkedblade.net/contact">
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<link rel="match" href="at-supports-001-ref.html">
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<style>
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div {
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background: green;
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height: 20px;
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width: 100px;
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}
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body {
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--badcolor: red;
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--goodcolor: green;
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}
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div {
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background: var(--badcolor);
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}
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@supports (--foo: whatever) {
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.test1 { background: green; }
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}
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@supports (--foo: whatever !important) {
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.test2 { background: var(--goodcolor); }
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}
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.test3 { background: green; }
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@supports (--foo: whatever !bogus) {
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.test3 { background: red; }
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}
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@supports (color: var(--anything) invalid-value) {
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.test4 { background: green; }
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}
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.test5 { background: red; }
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@supports not (--goodcolor: green) {
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.test5 { background: green; }
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}
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.test5 { background: var(--goodcolor) }
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</style>
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<p>Test passes if there is a <strong>filled green square</strong> and <strong>no red</strong>.</p>
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<div class="test1"></div>
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<div class="test2"></div>
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<div class="test3"></div>
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<div class="test4"></div>
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<div class="test5"></div>
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