Function propertyName

lib/util/property.js:69–74

(prop)

 * @returns {string} valid JS property name
 */
const propertyName = (prop) => {
	if (SAFE_IDENTIFIER.test(prop) && !RESERVED_IDENTIFIER.has(prop)) {
		return prop;
	}
	return JSON.stringify(prop);
};

/**
 * Returns chain of property accesses.