Function toLocaleString

fmt/bytes.ts:194–206

* Formats the given number using `Number#toLocaleString`. * - If locale is a string, the value is expected to be a locale-key (for example: `de`). * - If locale is true, the system default locale is used for translation. * - If no value for locale is specified, the number is returned unmodified.

(
  num: number,
  locale: boolean | string | string[] | undefined,
  options: LocaleOptions | undefined,
)

 * - If no value for locale is specified, the number is returned unmodified.
 */
function toLocaleString(
  num: number,
  locale: boolean | string | string[] | undefined,
  options: LocaleOptions | undefined,
): string {
  if (typeof locale === "string" || Array.isArray(locale)) {
    return num.toLocaleString(locale, options);
  } else if (locale === true || options !== undefined) {
    return num.toLocaleString(undefined, options);
  }

  return num.toString();
}