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node_modules/stylelint/lib/utils/isStandardSyntaxValue.mjs

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+import hasInterpolation from './hasInterpolation.mjs';
+
+/**
+ * Check whether a value is standard
+ *
+ * @param {string} value
+ * @returns {boolean}
+ */
+export default function isStandardSyntaxValue(value) {
+	let normalizedValue = value;
+
+	// Ignore operators before variables (example -$variable)
+	if (/^[-+*/]/.test(value.charAt(0))) {
+		normalizedValue = normalizedValue.slice(1);
+	}
+
+	// SCSS variable (example $variable)
+	if (normalizedValue.startsWith('$')) {
+		return false;
+	}
+
+	// SCSS namespace (example namespace.$variable)
+	if (/^.+\.\$/.test(value)) {
+		return false;
+	}
+
+	// SCSS namespace (example namespace.function-name())
+	if (/^.+\.[-\w]+\(/.test(value)) {
+		return false;
+	}
+
+	// Less variable
+	if (normalizedValue.startsWith('@')) {
+		return false;
+	}
+
+	// SCSS or Less interpolation
+	if (hasInterpolation(normalizedValue)) {
+		return false;
+	}
+
+	// WebExtension replacement keyword used by Chrome/Firefox
+	// more information: https://developer.chrome.com/extensions/i18n
+	// and https://github.com/stylelint/stylelint/issues/4707
+	if (/__MSG_\S+__/.test(value)) {
+		return false;
+	}
+
+	return true;
+}