List loaded locales

[jisaacks]

Fixes #843

This adds the method moment.locales() to get an array of the locales that have been loaded (ie, bundled with moment.js or manually required in node.)

It does not list or require available (but unloaded) locales in node. I think that should be a separate feature if needed at all.

[mattjohnsonpint]

LGTM. Staging for next release. Thanks!

[mattjohnsonpint]

It would be nice to see a smarter test here. Test for content, at least for English, and perhaps include one custom locale (like dude shown in the test above)

[ichernev]

Merged in c0519b5

[Silviu-Marian]

Should this be in the docs too? I'm asking because I wasn't able to find any references to it

[fracz]

The method is

let locales = moment.locales(); // ['en', 'ru', 'pl']

[gilles6]

For me, it only returns ["en"], not the list of available locales. How to return such list ?

[mhornbacher]

@devondahon when you try yo change the locale with moment.locale() does it work?

It could be that your other locales are not importing properly....

[anhkhoi]

The locales() function just return ["en"]. It doesn't work for me. Any one know the reason?

[mhornbacher]

@anhkhoi how are you loading your secondary locales?

[StefansArya]

@mhornbacher I just created custom script

https://gist.github.com/StefansArya/1a9423fab2b966a08ea672a864a98333

[mhornbacher]

@StefansArya nice script! Is something broken with it?

[StefansArya]

@mhornbacher I just tested on jsbin and working as expected. You can use any locale format like
ja-JP, ja_JP, or ja

It also has additional fallback, for the example ja-JP was not found on the list and it will try to strip the -JP and use ja instead.

The first argument on the callback will return ja if it was successfully loaded, and false if language was not found.

If you call loadLocale more than once with same locale name, it wouldn't not do any HTTP request. But will call moment.locale() directly and the given callback.

Also tested and working on IE11.

[tonix-tuft]

I think that the listing of all the supported/available locales (even if there were not loaded yet) should be included in the moment core itself, and not hardcoded in the client code, what do you think?

It would be nice to have a method e.g. like .allSupportedLocales():

import moment from "moment";

console.log(moment.allSupportedLocales()); // ["en", "it", "de", ..., "ja", ...]