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diff --git a/node_modules/doiuse/data/features/css-optional-pseudo.js b/node_modules/doiuse/data/features/css-optional-pseudo.js
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+++ b/node_modules/doiuse/data/features/css-optional-pseudo.js
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+/**
+ * The `:optional` pseudo-class matches form inputs (`<input>`, `<textarea>`, `<select>`) which are not `:required`.
+ * @see https://caniuse.com/css-optional-pseudo
+ */
+
+import { checkSelector } from '../../utils/util.js';
+
+/**
+ * @type {import('../features').Feature}
+ */
+export default checkSelector(':optional');