报错？

[qiuyan81]

import Vue from 'vue'
import Vuex from 'vuex'

import createPersistedState from "vuex-persistedstate"
Vue.use(Vuex)
import { localStorage,sessionStorage } from 'mp-storage'//这句引用就报错

/*
错误内容：
eportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->Exception: TypeError: null is not an object (evaluating 'i.length')
*/
import createLogger from 'vuex/dist/logger'
// 判断环境 vuex提示生产环境中不使用
const debug = process.env.NODE_ENV !== 'production'
const store = new Vuex.Store({
// plugins: debug?[createLogger,createPersistedState({
// storage: window.sessionStorage
// })]:[createPersistedState({
// storage: window.sessionStorage
// })],
plugins: [
createPersistedState({
storage: localStorage
})
],

state: {
	hasLogin: false,
	openId:null,
	companyId:null,
	appId: null,
	last_url: null,
	params:{},
	
	systemInfo: {},
	loginInfo: {},
},
mutations: {
	login(state, openId) {
		state.hasLogin = true;
		state.openId = openId;
	},
	logout(state) {
		state.hasLogin = false
		state.openId = null
		state.companyId=null
	},
	setOpenId(state,openId){
		state.openId=openId
	},
	 setCompanyId(state,companyId){
		state.companyId=companyId
	 },
	 setAppId(state,appId){
		 state.appId=appId
	 },
	 setLast_url(state,last_url){
		 state.last_url=last_url
	 },
	 setParams(state,params){
		 state.params=params
	 },
	 setSystemInfo(state,systemInfo){
		 state.systemInfo=systemInfo
	 },
	 setLoginInfo(state,loginInfo){
		 state.loginInfo=loginInfo
	 }
},
getters:{		
},
actions: {
	// lazy loading openid
	getUserOpenId: async function ({
		commit,
		state
	}) {
		return await new Promise((resolve, reject) => {
			if (state.openid) {
				resolve(state.openid)
			} else {
				uni.login({
					success: (data) => {
						commit('login')
						setTimeout(function () { //模拟异步请求服务器获取 openid
							const openid = '123456789'
							console.log('uni.request mock openid[' + openid + ']');
							commit('setOpenid', openid)
							resolve(openid)
						}, 1000)
					},
					fail: (err) => {
						console.log('uni.login 接口调用失败，将无法正常使用开放接口等服务', err)
						reject(err)
					}
				})
			}
		})
	}
}

})

export default store

[zhetengbiji]

import 应该放在顶部