/** ** @/store/index.js ****/
import Vue from 'vue'
import Vuex from 'vuex'
import createPersistedState from 'vuex-persistedstate' // 【主要代码】

Vue.use(Vuex)

// https://webpack.js.org/guides/dependency-management/#requirecontext
const modulesFiles = require.context('./modules', true, /\.js$/)

// you do not need `import app from './modules/app'`
// it will auto require all vuex module from modules file
const modules = modulesFiles.keys().reduce((modules, modulePath) => {
    // set './app.js' => 'app'
    const moduleName = modulePath.replace(/^\.\/(.*)\.\w+$/, '$1')
    const value = modulesFiles(modulePath)
    modules[moduleName] = value.default
    return modules
}, {})
const store = new Vuex.Store({
    modules,
    plugins: [createPersistedState()] // 【主要代码】
})

export default store