Add d.ts for Intl.RelativeTimeFormat

src/compiler/commandLineParser.ts

@@ -53,6 +53,7 @@ namespace ts {
         ["es2020.promise", "lib.es2020.promise.d.ts"],
         ["es2020.string", "lib.es2020.string.d.ts"],
         ["es2020.symbol.wellknown", "lib.es2020.symbol.wellknown.d.ts"],
+        ["es2020.intl", "lib.es2020.intl.d.ts"],
         ["esnext.array", "lib.es2019.array.d.ts"],
         ["esnext.symbol", "lib.es2019.symbol.d.ts"],
         ["esnext.asynciterable", "lib.es2018.asynciterable.d.ts"],

src/lib/es2020.d.ts

@@ -3,3 +3,4 @@
 /// <reference lib="es2020.promise" />
 /// <reference lib="es2020.string" />
 /// <reference lib="es2020.symbol.wellknown" />
+/// <reference lib="es2020.intl" />

src/lib/es2020.intl.d.ts

@@ -0,0 +1,264 @@
+declare namespace Intl {
+
+    /**
+     * [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).
+     *
+     * [Wikipedia](https://en.wikipedia.org/wiki/IETF_language_tag).
+     */
+    type BCP47LanguageTag = 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).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-singularrelativetimeunit).
+     */
+    type RelativeTimeFormatUnit =
+        | "year" | "years"
+        | "quarter" | "quarters"
+        | "month" | "months"
+        | "week" | "weeks"
+        | "day" | "days"
+        | "hour" | "hours"
+        | "minute" | "minutes"
+        | "second" | "seconds"
+        ;
+
+    /**
+     * The locale matching algorithm to use.
+     *
+     * [MDN](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-InitializeRelativeTimeFormat).
+     */
+    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).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-InitializeRelativeTimeFormat).
+     */
+    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).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-InitializeRelativeTimeFormat).
+     */
+    type RelativeTimeFormatStyle = "long" | "short" | "narrow";
+
+    /**
+     * 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).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-InitializeRelativeTimeFormat).
+     */
+    interface RelativeTimeFormatOptions {
+        localeMatcher?: RelativeTimeFormatLocaleMatcher;
+        numeric?: RelativeTimeFormatNumeric;
+        style?: RelativeTimeFormatStyle;
+    }
+
+    /**
+     * An object with properties reflecting the locale
+     * and formatting options computed during initialization
+     * of the `Intel.RelativeTimeFormat` object
+     *
+     * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/resolvedOptions#Description).
+     *
+     * [Specification](https://tc39.es/ecma402/#table-relativetimeformat-resolvedoptions-properties)
+     */
+    interface ResolvedRelativeTimeFormatOptions {
+        locale: BCP47LanguageTag;
+        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).
+     *
+     * [Specification](https://tc39.es/ecma402/#sec-FormatRelativeTimeToParts).
+     */
+    interface RelativeTimeFormatPart {
+        type: string;
+        value: string;
+        unit?: RelativeTimeFormatUnit;
+    }
+
+    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.
+         *  Possible values are: `"year"`, `"quarter"`, `"month"`, `"week"`,
+         *  `"day"`, `"hour"`, `"minute"`, `"second"`.
+         *  Plural forms are also permitted.
+         *
+         * @throws `RangeError` if `unit` was given something other than `unit` possible values
+         *
+         * @returns Internationalized relative time message as string
+         *
+         * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/format).
+         *
+         * [Specification](https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat.prototype.format).
+         */
+        format(
+            value: number,
+            unit: RelativeTimeFormatUnit,
+        ): string;
+
+        /**
+         *  A version of the format method which it returns an array of objects
+         *  which represent "parts" of the object,
+         *  separating the formatted number into its constituent parts
+         *  and separating it from other surrounding text.
+         *  These objects have two properties:
+         * `type` a NumberFormat formatToParts type, and `value`,
+         *  which is the String which is the component of the output.
+         *  If a "part" came from NumberFormat,
+         *  it will have a unit property which indicates the `unit` being formatted;
+         *  literals which are part of the larger frame will not have this property.
+         *
+         *  @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.
+         *   Possible values are: `"year"`, `"quarter"`, `"month"`, `"week"`,
+         *   `"day"`, `"hour"`, `"minute"`, `"second"`.
+         *   Plural forms are also permitted.
+         *
+         *  @throws `RangeError` if `unit` was given something other than `unit` possible values
+         *
+         *  @returns Array of [FormatRelativeTimeToParts](https://tc39.es/ecma402/#sec-FormatRelativeTimeToParts)
+         *
+         *  [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/formatToParts).
+         *
+         *  [Specification](https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat.prototype.formatToParts).
+         */
+        formatToParts(
+            value: number,
+            unit: RelativeTimeFormatUnit,
+        ): RelativeTimeFormatPart[];
+
+        /**
+         * Provides access to the locale and options computed during initialization of this `Intl.RelativeTimeFormat` object.
+         *
+         * @returns A new object with properties reflecting the locale
+         *  and formatting options computed during initialization
+         *  of the `Intel.RelativeTimeFormat` object.
+         *
+         * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat/resolvedOptions).
+         *
+         * [Specification](https://tc39.es/ecma402/#sec-intl.relativetimeformat.prototype.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.
+     *
+     * Part of [Intl object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl)
+     * namespace and the [ECMAScript Internationalization API](https://www.ecma-international.org/publications/standards/Ecma-402.htm).
+     *
+     * [Compatibility](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/RelativeTimeFormat#Browser_compatibility).
+     *
+     * [Polyfills](https://github.com/tc39/proposal-intl-relative-time#polyfills).
+     */
+    const RelativeTimeFormat: {
+        /**
+         * Constructor 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 the formatting.
+         *  An object with some or all of the following properties:
+         *  - `localeMatcher` - The locale matching algorithm to use.
+         *    Possible values are `"lookup"` and `"best fit"`; the default is `"best fit"`.
+         *    For information about this option, see [Intl page](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation).
+         *  - `numeric` - The format of output message.
+         *    Possible values are: `"always"` (default, e.g., `1 day ago`) or `"auto"` (e.g., `yesterday`).
+         *    The `"auto"` value allows to not always have to use numeric values in the output.
+         *  - `style` - The length of the internationalized message. Possible values are:
+         *    `"long"` (default, e.g., in 1 month),
+         *    `"short"` (e.g., in 1 mo.)
+         *    or `"narrow"` (e.g., in 1 mo.). The narrow style could be similar to the short style for some locales.
+         *
+         * @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).
+         *
+         * [Specification](https://tc39.es/ecma402/#sec-intl-relativetimeformat-constructor).
+         */
+        new(
+            locales?: BCP47LanguageTag | BCP47LanguageTag[],
+            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.
+         *  An object with some or all of the following properties:
+         *  - `localeMatcher` - The locale matching algorithm to use.
+         *    Possible values are `"lookup"` and `"best fit"`; the default is `"best fit"`.
+         *    For information about this option, see [Intl page](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl#Locale_negotiation).
+         *  - `numeric` - The format of output message.
+         *    Possible values are: `"always"` (default, e.g., `1 day ago`) or `"auto"` (e.g., `yesterday`).
+         *    The `"auto"` value allows to not always have to use numeric values in the output.
+         *  - `style` - The length of the internationalized message. Possible values are:
+         *    `"long"` (default, e.g., in 1 month),
+         *    `"short"` (e.g., in 1 mo.)
+         *    or `"narrow"` (e.g., in 1 mo.). The narrow style could be similar to the short style for some locales.
+         *
+         * @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).
+         *
+         * [Specification](https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat.supportedLocalesOf).
+         */
+        supportedLocalesOf(
+            locales: BCP47LanguageTag | BCP47LanguageTag[],
+            options?: RelativeTimeFormatOptions,
+        ): BCP47LanguageTag[];
+    };
+}

src/lib/libs.json

@@ -44,6 +44,7 @@
         "es2020.promise",
         "es2020.string",
         "es2020.symbol.wellknown",
+        "es2020.intl",
         "esnext.intl",
         "esnext.string",
         "esnext.promise",