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node_modules/stylelint/lib/rules/at-rule-no-unknown/index.mjs

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+import { isRegExp, isString } from '../../utils/validateTypes.mjs';
+import { atKeywords } from '../../reference/atKeywords.mjs';
+import isStandardSyntaxAtRule from '../../utils/isStandardSyntaxAtRule.mjs';
+import optionsMatches from '../../utils/optionsMatches.mjs';
+import report from '../../utils/report.mjs';
+import ruleMessages from '../../utils/ruleMessages.mjs';
+import validateOptions from '../../utils/validateOptions.mjs';
+import vendor from '../../utils/vendor.mjs';
+
+const ruleName = 'at-rule-no-unknown';
+
+const messages = ruleMessages(ruleName, {
+	rejected: (atRule) => `Unexpected unknown at-rule "${atRule}"`,
+});
+
+const meta = {
+	url: 'https://stylelint.io/user-guide/rules/at-rule-no-unknown',
+};
+
+/** @type {import('stylelint').CoreRules[ruleName]} */
+const rule = (primary, secondaryOptions) => {
+	return (root, result) => {
+		const validOptions = validateOptions(
+			result,
+			ruleName,
+			{ actual: primary },
+			{
+				actual: secondaryOptions,
+				possible: {
+					ignoreAtRules: [isString, isRegExp],
+				},
+				optional: true,
+			},
+		);
+
+		if (!validOptions) {
+			return;
+		}
+
+		root.walkAtRules((atRule) => {
+			if (!isStandardSyntaxAtRule(atRule)) {
+				return;
+			}
+
+			const name = atRule.name;
+
+			// Return early if at-rule is to be ignored
+			if (optionsMatches(secondaryOptions, 'ignoreAtRules', atRule.name)) {
+				return;
+			}
+
+			if (vendor.prefix(name) || atKeywords.has(name.toLowerCase())) {
+				return;
+			}
+
+			const atName = `@${name}`;
+
+			report({
+				message: messages.rejected,
+				messageArgs: [atName],
+				node: atRule,
+				ruleName,
+				result,
+				word: atName,
+			});
+		});
+	};
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+rule.meta = meta;
+export default rule;