declare namespace Intl {
/**
* [Unicode BCP 47 Locale Identifiers](https://unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers) definition.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
*/
type UnicodeBCP47LocaleIdentifier = string;
/**
* Unit to use in the relative time internationalized message.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/format#Parameters).
*/
type RelativeTimeFormatUnit =
| "year"
| "years"
| "quarter"
| "quarters"
| "month"
| "months"
| "week"
| "weeks"
| "day"
| "days"
| "hour"
| "hours"
| "minute"
| "minutes"
| "second"
| "seconds";
/**
* Value of the `unit` property in objects returned by
* `Intl.RelativeTimeFormat.prototype.formatToParts()`. `formatToParts` and
* `format` methods accept either singular or plural unit names as input,
* but `formatToParts` only outputs singular (e.g. "day") not plural (e.g.
* "days").
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/formatToParts#Using_formatToParts).
*/
type RelativeTimeFormatUnitSingular =
| "year"
| "quarter"
| "month"
| "week"
| "day"
| "hour"
| "minute"
| "second";
/**
* The locale matching algorithm to use.
*
* [MDN](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation).
*/
type RelativeTimeFormatLocaleMatcher = "lookup" | "best fit";
/**
* The format of output message.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat#Parameters).
*/
type RelativeTimeFormatNumeric = "always" | "auto";
/**
* The length of the internationalized message.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat#Parameters).
*/
type RelativeTimeFormatStyle = "long" | "short" | "narrow";
/**
* [BCP 47 language tag](http://tools.ietf.org/html/rfc5646) definition.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
*/
type BCP47LanguageTag = string;
/**
* The locale(s) to use
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locales_argument).
*/
type LocalesArgument = UnicodeBCP47LocaleIdentifier | Locale | readonly (UnicodeBCP47LocaleIdentifier | Locale)[] | undefined;
/**
* An object with some or all of properties of `options` parameter
* of `Intl.RelativeTimeFormat` constructor.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat#Parameters).
*/
interface RelativeTimeFormatOptions {
/** The locale matching algorithm to use. For information about this option, see [Intl page](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation). */
localeMatcher?: RelativeTimeFormatLocaleMatcher;
/** The format of output message. */
numeric?: RelativeTimeFormatNumeric;
/** The length of the internationalized message. */
style?: RelativeTimeFormatStyle;
}
/**
* An object with properties reflecting the locale
* and formatting options computed during initialization
* of the `Intl.RelativeTimeFormat` object
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/resolvedOptions#Description).
*/
interface ResolvedRelativeTimeFormatOptions {
locale: UnicodeBCP47LocaleIdentifier;
style: RelativeTimeFormatStyle;
numeric: RelativeTimeFormatNumeric;
numberingSystem: string;
}
/**
* An object representing the relative time format in parts
* that can be used for custom locale-aware formatting.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/formatToParts#Using_formatToParts).
*/
type RelativeTimeFormatPart =
| {
type: "literal";
value: string;
}
| {
type: Exclude<NumberFormatPartTypes, "literal">;
value: string;
unit: RelativeTimeFormatUnitSingular;
};
interface RelativeTimeFormat {
/**
* Formats a value and a unit according to the locale
* and formatting options of the given
* [`Intl.RelativeTimeFormat`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat)
* object.
*
* While this method automatically provides the correct plural forms,
* the grammatical form is otherwise as neutral as possible.
*
* It is the caller's responsibility to handle cut-off logic
* such as deciding between displaying "in 7 days" or "in 1 week".
* This API does not support relative dates involving compound units.
* e.g "in 5 days and 4 hours".
*
* @param value - Numeric value to use in the internationalized relative time message
*
* @param unit - [Unit](https://tc39.es/ecma402/#sec-singularrelativetimeunit) to use in the relative time internationalized message.
*
* @throws `RangeError` if `unit` was given something other than `unit` possible values
*
* @returns {string} Internationalized relative time message as string
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/format).
*/
format(value: number, unit: RelativeTimeFormatUnit): string;
/**
* Returns an array of objects representing the relative time format in parts that can be used for custom locale-aware formatting.
*
* @param value - Numeric value to use in the internationalized relative time message
*
* @param unit - [Unit](https://tc39.es/ecma402/#sec-singularrelativetimeunit) to use in the relative time internationalized message.
*
* @throws `RangeError` if `unit` was given something other than `unit` possible values
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/formatToParts).
*/
formatToParts(value: number, unit: RelativeTimeFormatUnit): RelativeTimeFormatPart[];
/**
* Provides access to the locale and options computed during initialization of this `Intl.RelativeTimeFormat` object.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/resolvedOptions).
*/
resolvedOptions(): ResolvedRelativeTimeFormatOptions;
}
/**
* The [`Intl.RelativeTimeFormat`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat)
* object is a constructor for objects that enable language-sensitive relative time formatting.
*
* [Compatibility](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat#Browser_compatibility).
*/
const RelativeTimeFormat: {
/**
* Creates [Intl.RelativeTimeFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat) objects
*
* @param locales - A string with a [BCP 47 language tag](http://tools.ietf.org/html/rfc5646), or an array of such strings.
* For the general form and interpretation of the locales argument,
* see the [`Intl` page](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_identification_and_negotiation).
*
* @param options - An [object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat#Parameters)
* with some or all of options of `RelativeTimeFormatOptions`.
*
* @returns [Intl.RelativeTimeFormat](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat) object.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat).
*/
new (
locales?: UnicodeBCP47LocaleIdentifier | UnicodeBCP47LocaleIdentifier[],
options?: RelativeTimeFormatOptions,
): RelativeTimeFormat;
/**
* Returns an array containing those of the provided locales
* that are supported in date and time formatting
* without having to fall back to the runtime's default locale.
*
* @param locales - A string with a [BCP 47 language tag](http://tools.ietf.org/html/rfc5646), or an array of such strings.
* For the general form and interpretation of the locales argument,
* see the [`Intl` page](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_identification_and_negotiation).
*
* @param options - An [object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/RelativeTimeFormat#Parameters)
* with some or all of options of the formatting.
*
* @returns An array containing those of the provided locales
* that are supported in date and time formatting
* without having to fall back to the runtime's default locale.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/supportedLocalesOf).
*/
supportedLocalesOf(
locales?: UnicodeBCP47LocaleIdentifier | UnicodeBCP47LocaleIdentifier[],
options?: RelativeTimeFormatOptions,
): UnicodeBCP47LocaleIdentifier[];
};
interface NumberFormatOptions {
compactDisplay?: "short" | "long" | undefined;
notation?: "standard" | "scientific" | "engineering" | "compact" | undefined;
signDisplay?: "auto" | "never" | "always" | "exceptZero" | undefined;
unit?: string | undefined;
unitDisplay?: "short" | "long" | "narrow" | undefined;
currencyDisplay?: string | undefined;
currencySign?: string | undefined;
}
interface ResolvedNumberFormatOptions {
compactDisplay?: "short" | "long";
notation?: "standard" | "scientific" | "engineering" | "compact";
signDisplay?: "auto" | "never" | "always" | "exceptZero";
unit?: string;
unitDisplay?: "short" | "long" | "narrow";
currencyDisplay?: string;
currencySign?: string;
}
interface DateTimeFormatOptions {
calendar?: string | undefined;
dayPeriod?: "narrow" | "short" | "long" | undefined;
numberingSystem?: string | undefined;
dateStyle?: "full" | "long" | "medium" | "short" | undefined;
timeStyle?: "full" | "long" | "medium" | "short" | undefined;
hourCycle?: "h11" | "h12" | "h23" | "h24" | undefined;
}
type LocaleHourCycleKey = "h12" | "h23" | "h11" | "h24";
type LocaleCollationCaseFirst = "upper" | "lower" | "false";
interface LocaleOptions {
/** A string containing the language, and the script and region if available. */
baseName?: string;
/** The part of the Locale that indicates the locale's calendar era. */
calendar?: string;
/** Flag that defines whether case is taken into account for the locale's collation rules. */
caseFirst?: LocaleCollationCaseFirst;
/** The collation type used for sorting */
collation?: string;
/** The time keeping format convention used by the locale. */
hourCycle?: LocaleHourCycleKey;
/** The primary language subtag associated with the locale. */
language?: string;
/** The numeral system used by the locale. */
numberingSystem?: string;
/** Flag that defines whether the locale has special collation handling for numeric characters. */
numeric?: boolean;
/** The region of the world (usually a country) associated with the locale. Possible values are region codes as defined by ISO 3166-1. */
region?: string;
/** The script used for writing the particular language used in the locale. Possible values are script codes as defined by ISO 15924. */
script?: string;
}
interface Locale extends LocaleOptions {
/** A string containing the language, and the script and region if available. */
baseName: string;
/** The primary language subtag associated with the locale. */
language: string;
/** Gets the most likely values for the language, script, and region of the locale based on existing values. */
maximize(): Locale;
/** Attempts to remove information about the locale that would be added by calling `Locale.maximize()`. */
minimize(): Locale;
/** Returns the locale's full locale identifier string. */
toString(): BCP47LanguageTag;
}
/**
* Constructor creates [Intl.Locale](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale)
* objects
*
* @param tag - A string with a [BCP 47 language tag](http://tools.ietf.org/html/rfc5646).
* For the general form and interpretation of the locales argument,
* see the [`Intl` page](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_identification_and_negotiation).
*
* @param options - An [object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/Locale#Parameters) with some or all of options of the locale.
*
* @returns [Intl.Locale](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale) object.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale).
*/
const Locale: {
new (tag: BCP47LanguageTag | Locale, options?: LocaleOptions): Locale;
};
type DisplayNamesFallback =
| "code"
| "none";
type DisplayNamesType =
| "language"
| "region"
| "script"
| "calendar"
| "dateTimeField"
| "currency";
type DisplayNamesLanguageDisplay =
| "dialect"
| "standard";
interface DisplayNamesOptions {
localeMatcher?: RelativeTimeFormatLocaleMatcher;
style?: RelativeTimeFormatStyle;
type: DisplayNamesType;
languageDisplay?: DisplayNamesLanguageDisplay;
fallback?: DisplayNamesFallback;
}
interface ResolvedDisplayNamesOptions {
locale: UnicodeBCP47LocaleIdentifier;
style: RelativeTimeFormatStyle;
type: DisplayNamesType;
fallback: DisplayNamesFallback;
languageDisplay?: DisplayNamesLanguageDisplay;
}
interface DisplayNames {
/**
* Receives a code and returns a string based on the locale and options provided when instantiating
* [`Intl.DisplayNames()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames)
*
* @param code The `code` to provide depends on the `type` passed to display name during creation:
* - If the type is `"region"`, code should be either an [ISO-3166 two letters region code](https://www.iso.org/iso-3166-country-codes.html),
* or a [three digits UN M49 Geographic Regions](https://unstats.un.org/unsd/methodology/m49/).
* - If the type is `"script"`, code should be an [ISO-15924 four letters script code](https://unicode.org/iso15924/iso15924-codes.html).
* - If the type is `"language"`, code should be a `languageCode` ["-" `scriptCode`] ["-" `regionCode` ] *("-" `variant` )
* subsequence of the unicode_language_id grammar in [UTS 35's Unicode Language and Locale Identifiers grammar](https://unicode.org/reports/tr35/#Unicode_language_identifier).
* `languageCode` is either a two letters ISO 639-1 language code or a three letters ISO 639-2 language code.
* - If the type is `"currency"`, code should be a [3-letter ISO 4217 currency code](https://www.iso.org/iso-4217-currency-codes.html).
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/of).
*/
of(code: string): string | undefined;
/**
* Returns a new object with properties reflecting the locale and style formatting options computed during the construction of the current
* [`Intl/DisplayNames`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames) object.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/resolvedOptions).
*/
resolvedOptions(): ResolvedDisplayNamesOptions;
}
/**
* The [`Intl.DisplayNames()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames)
* object enables the consistent translation of language, region and script display names.
*
* [Compatibility](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames#browser_compatibility).
*/
const DisplayNames: {
prototype: DisplayNames;
/**
* @param locales A string with a BCP 47 language tag, or an array of such strings.
* For the general form and interpretation of the `locales` argument, see the [Intl](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locale_identification_and_negotiation)
* page.
*
* @param options An object for setting up a display name.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/DisplayNames).
*/
new (locales: LocalesArgument, options: DisplayNamesOptions): DisplayNames;
/**
* Returns an array containing those of the provided locales that are supported in display names without having to fall back to the runtime's default locale.
*
* @param locales A string with a BCP 47 language tag, or an array of such strings.
* For the general form and interpretation of the `locales` argument, see the [Intl](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl#locale_identification_and_negotiation)
* page.
*
* @param options An object with a locale matcher.
*
* @returns An array of strings representing a subset of the given locale tags that are supported in display names without having to fall back to the runtime's default locale.
*
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/supportedLocalesOf).
*/
supportedLocalesOf(locales?: LocalesArgument, options?: { localeMatcher?: RelativeTimeFormatLocaleMatcher; }): BCP47LanguageTag[];
};
}