format() typeerror

[mingxin-yang]

Describe the bug

use dayjs().format() out TypeError: undefined is not an object (evaluating 'i[r]')

My code is

`import dayjs from 'dayjs';
import isSameOrBefore from 'dayjs/plugin/isSameOrBefore'
import isSameOrAfter from 'dayjs/plugin/isSameOrAfter'
dayjs.extend(isSameOrBefore)
dayjs.extend(isSameOrAfter)

console.log("3223",dayjs('2019-01-25').format())`

Expected behavior
A clear and concise description of what you expected to happen.

Information

• Day.js Version v1.9.5
• OS: android
• Browser react native
• Time zone:UTC/GMT +8 hours CST

[iamkun]

Seems good https://runkit.com/embed/074vo0sil5fo

[mingxin-yang]

My node version is v10.16.3

[iamkun]

Tested on v10.16.3 and works as well

[mingxin-yang]

Is that cased by react native?

[iamkun]

Sorry can't help, I don't know React Native.