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node_modules/stylelint/lib/utils/isStandardSyntaxFunction.mjs

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+/**
+ * Check whether a function is standard
+ *
+ * @param {import('postcss-value-parser').Node} node
+ * @returns {boolean}
+ */
+export default function isStandardSyntaxFunction(node) {
+	// Function nodes without names are things in parentheses like Sass lists
+	if (!node.value) {
+		return false;
+	}
+
+	if (node.value.startsWith('#{')) {
+		return false;
+	}
+
+	// CSS-in-JS interpolation
+	if (node.value.startsWith('${')) {
+		return false;
+	}
+
+	// CSS-in-JS syntax
+	if (node.value.startsWith('`')) {
+		return false;
+	}
+
+	return true;
+}