Vue.js和Pouch-PouchDB不是构造函数

Question

我正在构建一个简单的Vue项目，以掌握简单的商店（vuex），然后使用PouchDB。我遇到了一个奇怪的错误，正在努力寻找 下一步去哪里

const PouchDB = require('pouchdb')
import EntryForm from '@/components/EntryForm.vue'
import DisplayText from '@/components/DisplayText.vue'

export default {
  name: 'entryform',
  components: {
    EntryForm,
    DisplayText
  },

  data() {
    return {
      db: [],
      remote: [],
      stepfwd: [],
      stepback: [],
      newMutation: true
    }
  },
  created() {
    //window.db or this.db does it matter ?
    this.db = new PouchDB('icecream')
    this.remote = 'http://localhost:5984/icecream'
    this.db.sync(this.remote, { live: true, retry: true })

    //any mutations are put into the stepfwd array and put into the db array
    this.$store.subscribe(mutation => {
      if (mutation.type !== CLEAR_STATE) {
        this.stepfwd.push(mutation)
        this.db.push(mutation)
      }
      if (this.newMutation) {
        this.stepback = []
      }
    })
  }

任何帮助者都很感激。

所有分支代码都可以在此处查看 https://gitlab.adamprocter.co.uk/adamprocter/simplevuestore/tree/pouchdb