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node_modules/stylelint/lib/utils/getImportantPosition.mjs

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+/**
+ * Returns a position of `!important` (or `! important` including whitespaces)
+ * from the specified CSS source code. If not found, returns `undefined`.
+ *
+ * @param {string} source
+ * @returns {{ index: number, endIndex: number } | undefined}
+ */
+export default function getImportantPosition(source) {
+	const pattern = /!\s*important\b/gi;
+	const match = pattern.exec(source);
+
+	if (!match) return;
+
+	return { index: match.index, endIndex: pattern.lastIndex };
+}