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17 lines
383 B
HTML
17 lines
383 B
HTML
<!doctype html>
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<link rel="match" href="pseudo-class-defined-print-ref.html">
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<style>
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custom-element {
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display: block;
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width: 100px;
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height: 100px;
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background: green;
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}
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custom-element:not(:defined) {
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background: red;
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}
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</style>
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<custom-element></custom-element>
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<script>
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customElements.define("custom-element", class extends HTMLElement { });
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</script>
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