Typescript: [i18n] Intl getCanonicalLocales / RelativeTimeFormat / ListFormat > 2339 error

[dtruffaut]

TypeScript Version: 3.2.2

Search Terms:
Intl.getCanonicalLocales TS TypeScript Error 2339 undefined i18n

Code

Intl.getCanonicalLocales('EN-US');

Expected behavior:
Code works, and returns ["en-US"]
https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Intl/getCanonicalLocales

Actual behavior:
TS Error 2339, the property getCanonicalLocales does not exists on Intl

[dtruffaut]

Same thing with

Code

new Intl.RelativeTimeFormat('en');

Expected behavior:
Code works
https://developers.google.com/web/updates/2018/10/intl-relativetimeformat

Actual behavior:
TS Error 2339, the property RelativeTimeFormat does not exists on Intl

[dtruffaut]

Same thing with

Code

new Intl.ListFormat('en');

Expected behavior:
Code works
https://developers.google.com/web/updates/2018/12/intl-listformat

Actual behavior:
TS Error 2339, the property ListFormat does not exists on Intl

[dtruffaut]

How can I extend the Intl object in a types.d.ts file ?

[j-oliveras]

Drafts are not included into libs. You can declare a d.ts file with the definitions:

declare namespace Intl {
    function getCanonicalLocales(locales: string | string[]): string[];

    class RelativeTimeFormat {
        constructor(locale: string);

        // TODO Add other properties/methods
    }
    // const RelativeTimeFormat: any; // Use this instead of the class if you don't want to declare all properties/methods

    class ListFormat {
        constructor(locale: string);

        // TODO Add other properties/methods
    }
    // const ListFormat: any; // Use this instead of the class if you don't want to declare all properties/methods
}

[dtruffaut]

Thank you !

Administrators will close this issue when the features are definitively implemented.
For now, the workaround works like a charm.

[Dassderdie]

Is there any update on this? RelativeDateTime should is now more than a draft: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat

[longlho]

It’s not stage 4 yet

On Fri, Oct 25, 2019 at 4:17 AM Dassderdie [e-mail] wrote:

Is there any update on this? RelativeDateTime should is now more than a
draft:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RelativeTimeFormat

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub
https://github.com/microsoft/TypeScript/issues/29129?email_source=notifications&email_token=AABQM35CH6K24OI4KGMPTDTQQKTPZA5CNFSM4GL6RF22YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECHSK5Y#issuecomment-546252151,
or unsubscribe
https://github.com/notifications/unsubscribe-auth/AABQM3356XD2WN3VEOYKKD3QQKTPZANCNFSM4GL6RF2Q
.

[jessamp]

Has Intl.ListFormat been added for support?

[proteriax]

It is now stage 4.

[noinkling]

One of the polyfills for Intl.ListFormat has its own declaration file that you can use in the meantime.

RelativeTimeFormat has already been added.

39662 is pending for getCanonicalLocales