Crash with "zh-classical" messages

[nyurik]

This code crashes because it calls new Intl.PluralRules("zh-classical"), which is an error in Chrome.

try {
  const bb = new Banana('zh-classical', { messages: {} });
  console.error(bb.i18n('zh-classical -- {{PLURAL:$1|$1 aaa|$1 bbb}}', 10))
} catch (err) {
  console.error(err)
}

Error:

index.js:1 RangeError: Incorrect locale information provided
    at new PluralRules (<anonymous>)
    at r.getPluralForm (language.js:51)
    at r.convertPlural (language.js:36)
    at c.plural (emitter.js:134)
    at c.emit (emitter.js:55)
    at emitter.js:54
    at Array.map (<anonymous>)
    at c.emit (emitter.js:54)
    at i.parse (parser.js:13)
    at o.i18n (index.js:28)

[Nikerabbit]

I fixed a similar issue in https://phabricator.wikimedia.org/T228510

[Nikerabbit]

The standard language code for zh-classical is lzh.

[nyurik]

@Nikerabbit thanks, but the banana lib has an entry for it in

banana-i18n/src/languages/fallbacks.json

Line 156 in 6fc9211

"zh-classical": ["lzh"],

-- shouldn't it automatically handle such things internally? If banana lib is targeting Wikipedia, it should IMO handle every "language-like" prefix Wikipedia has -- i.e. *.wikipedia.org

[Nikerabbit]

I recommend against using the domain code as language code. There are many exceptions where they do not match. The real language code (queryable via API, mw.config.values.wgContentLanguage, etc.) is better.

[nyurik]

@Nikerabbit you assume the code runs in MW, whereas I use it outside of it -- https://dibabel.toolforge.org/ -- and I would have to resolve the domain into the default language. That said, could you explain why there is a fallback file? If its there, I would assume it is supported. Otherwise its a bug to have stuff in it that doesn't work :)

[nyurik]

P.S. I just double checked -- https://meta.wikimedia.org/w/api.php?action=sitematrix&formatversion=2 -- zh-classical is the official language code:

        "313": {
            "code": "zh-classical",
            "name": "文言",
            "site": [
                {
                    "url": "https://zh-classical.wikipedia.org",
                    "dbname": "zh_classicalwiki",
                    "code": "wiki",
                    "sitename": "維基大典"
                }
            ],
            "dir": "ltr",
            "localname": "Classical Chinese"
        },

[siddharthvp]

This is necro-posting, but that's the sitecode, not language code. Going to https://zh-classical.wikipedia.org and hitting mw.config.get('wgContentLanguage') gives lzh.