前端typescript 引入dayjs打包是报错线上不可用Cannot call a namespace (‘dayjs’)

Cannot call a namespace ('dayjs')

官方示例

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import * as dayjs from 'dayjs'
import * as isLeapYear from 'dayjs/plugin/isLeapYear' // import plugin
import 'dayjs/locale/zh-cn' // import locale
dayjs.extend(isLeapYear) // use plugin
dayjs.locale('zh-cn') // use locale

export const formateTime = (timestamp) => {
  let t = new Date(timestamp)
  return dayjs(t).format('YYYY-MM-DD')
}

线上报错 e.extend error

修改为

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import dayjs from 'dayjs'
import isLeapYear from 'dayjs/plugin/isLeapYear' // import plugin
import 'dayjs/locale/zh-cn' // import locale
dayjs.extend(isLeapYear) // use plugin
dayjs.locale('zh-cn') // use locale

export const formateTime = (timestamp) => {
  let t = new Date(timestamp)
  return dayjs(t).format('YYYY-MM-DD')
}