OptionalcurrencyOptionalformatThe number format. See utilities/format/number!NumberFormatter.format.
OptionalfractionalOptionallocaleThe locale to use when formatting the number. If not specified, the current locale is used (see locale module).
OptionalunitThe unit to use when formatting the number. If specified any additional supplied format will be ignored. Example: 'kilometer', 'mile', 'celsius' etc. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/supportedValuesOf#supported_unit_identifiers.
Options supported by format.