weekdaysShort only return the first day

Hi there, I facing a strange bug of dayjs locale that I can’t reproduce on fiddle 😢 It only occur on my projects, this isn’t the first time I used dayjs, but this is the first time I facing this problem. I know I should create reproduce steps but I can’t because my projects is too large and I trying to replace moment by dayjs so it have a lot of changes 😢

https://github.com/iamkun/dayjs/blob/8cf4d2d608b3cf99863b3ae77467dc8b9d83e729/src/index.js#L284 Sometime, the locale.weekdaysShort (line above) return only the first item of the full list, so it will result in a error on line below because arr[index] will be undefined: https://github.com/iamkun/dayjs/blob/8cf4d2d608b3cf99863b3ae77467dc8b9d83e729/src/index.js#L262

I debugging a half of day but I can’t find out why it occur, below is image that I captured when debugging directly on dayjs.min.js built file, please see it for more information because It really hard to describe by comment 😢

A strange point is the error doesn’t occur on default locale (en), It only occur when I use other locales (tested zh and vi locale).

Please see debug images below for more information because it really hard to be describe by comment.

Thank you so much for a great library ever.

Expected behavior The error t is not a function shouldn’t fired

Information

• Day.js Version 1.8.36
• OS: MacOs
• Browser: chrome 85
• Time zone: GMT+07:00
• Locale used for test: zh and vi

[iamkun]

I’m afraid I can not reproduce this on my computer. A demo repo provided will be better.

[iamkun]

Cheers~