feat:

Add initial type for prototype

Author: developer-bandi

src/lib/esnext.intl.d.ts

@@ -1,3 +1,53 @@
 declare namespace Intl {
-    // Empty
+    interface DurationFormat {
+        /**
+         * @param duration The duration object to be formatted. It should include some or all of the following properties: months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds.
+         * 
+         * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DurationFormat/format).
+         */
+        format(duration: Record<"years"|"months"|"weeks"|"days"|"hours"|"minutes"|"seconds"|"milliseconds"|"microseconds"|"nanoseconds",number>): string;
+        /**
+         * @param duration The duration object to be formatted. It should include some or all of the following properties: months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds.
+         *
+         * [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DurationFormat/formatToParts).
+         */
+        formatToParts(duration: Record<"years"|"months"|"weeks"|"days"|"hours"|"minutes"|"seconds"|"milliseconds"|"microseconds"|"nanoseconds",number>): {type:"integer"|"literal"|"unit",value:string,unit:"years"|"months"|"weeks"|"days"|"hours"|"minutes"|"seconds"|"milliseconds"|"microseconds"|"nanoseconds"}[];
+        /**
+         * 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/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames) object.
+         *
+         * [MDN](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/resolvedOptions).
+         */
+        resolvedOptions(): ResolvedDisplayNamesOptions;
+    }
+
+    const DurationFormat: {
+        prototype: DurationFormat;
+
+        /**
+         * @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/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/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/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/docs/Web/JavaScript/Reference/Global_Objects/Intl/DisplayNames/supportedLocalesOf).
+         */
+        supportedLocalesOf(locales?: LocalesArgument, options?: { localeMatcher?: RelativeTimeFormatLocaleMatcher; }): UnicodeBCP47LocaleIdentifier[];
+    };
 }