sortedObjectKeys.js

/**
 * This is a function for use with JSON.stringify(input, sortedObjectKeys, number)
 * that ensures that object keys are sorted in alphanumerical order.
 */
export function sortedObjectKeys(_, data) {
  // Ignore primitives.
  if (data === null) return null;
  if (typeof data !== "object") return data;

  // Also ignore iterables, which are type "object" but should not be sorted.
  if (data.__proto__[Symbol.iterator]) return data;

  // Then sort the object keys and yield a new object with that
  // ordering enforced by key insertion.
  return Object.fromEntries(Object.entries(data).sort());
}