vue ui get error message in locale zh-cn

[dousybox]

Version

3.4.0

Environment info

  System:
    OS: Windows 7
    CPU: (4) x64 Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz
  Binaries:
    Node: 10.15.0 - D:\Program Files\nodejs\node.EXE
    Yarn: Not Found
    npm: 6.7.0 - D:\Program Files\nodejs\npm.CMD
  npmGlobalPackages:
    @vue/cli: Not Found

Steps to reproduce

1. npm install -g @vue/cli
2. vue ui
3. system default browser will start automaticlly
4. change browser language to zh-cn
5. refresh the Vue Project Manager, language will change to zh-cn automaticlly
6. open the develop tool in browser, get the error message: Uncaught (in promise) Error: Cannot find module './zh'

What is expected?

no error message in browser console,
and pages can work fast.

What is actually happening?

error message Uncaught (in promise) Error: Cannot find module './zh' in browser console;
and the pages are woking very slowlly.

---

Runing vue ui has encured some error when the page switch to zh-cn language automaticlly.

Is there any way to the the default locale language for the Vue Project Manager?

[arthurdenner]

I investigated this issue and noticed that because of some "inconsistencies" between browser language, UI's locales and date-fns, this problem happens with Chinese and Brazilian Portuguese (and maybe others).

For Chinese, the browser gives us ["zh", "zh", "zh"] as language codes, the UI has zh.json, but date-fns has only zh_cn;

For Brazilian Portuguese, the browser gives us ["pt-BR", "pt-br", "pt"] as language codes, the UI has only pt_BR.json (and therefore we get 404 on unpkg), and date-fns has only pt;

@sodatea, any idea on how to proceed about this?

[haoqunjiang]

Fixed in #3966