app.config.globalProperties.$dateFormat = (date: string) => {
  if (!date) return ''
  return new Date(date).toLocaleString('zh-CN')
}

import { ComponentInternalInstance, getCurrentInstance } from 'vue'

export const useCurrentInstance = () => {
  const { appContext } = getCurrentInstance() as ComponentInternalInstance
  const proxy = appContext.config.globalProperties
  return {
    proxy
  }
}

<template>
  <div>
    {{ proxy?.$dateFormat(date) }}
  </div>
</template>

<script setup lang="ts">
import { useCurrentInstance } from '@/utils/useCurrentInstance'

const { proxy } = useCurrentInstance()
</script>