export function shallowEqual(a: unknown, b: unknown): boolean {
  if (Object.is(a, b)) {
    return true
  }

  if (!isObjectLike(a) || !isObjectLike(b)) {
    return false
  }

  const aKeys = Object.keys(a)
  const bKeys = Object.keys(b)

  if (aKeys.length !== bKeys.length) {
    return false
  }

  for (const key of aKeys) {
    if (!Object.prototype.hasOwnProperty.call(b, key)) {
      return false
    }

    if (!Object.is(a[key], b[key])) {
      return false
    }
  }

  return true
}

function isObjectLike(value: unknown): value is Record<string, unknown> {
  return typeof value === "object" && value !== null
}