配置vue全局方法的两种方式实例

import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import utils from './utils/Utils'

Vue.prototype.$utils = utils

new Vue({
 router,
 store,
 render: h => h(App)
}).$mount('#app')

methods: {
 fn() {
  let time = this.$utils.formatTime(new Date())
 }
}

const baseURL = process.env.VUE_APP_BASE_URL
const webpack = require('webpack')
const path = require("path")

module.exports = {
 publicPath: './',
 outputDir: process.env.VUE_APP_BASE_OUTPUTDIR,
 assetsDir: 'assets',
 lintOnSave: true,
 productionSourceMap: false,
 configureWebpack: {
  devServer: {
   open: false,
   overlay: {
    warning: true,
    errors: true,
   },
   host: 'localhost',
   port: '9000',
   hotOnly: false,
   proxy: {
    '/api': {
     target: baseURL,
     secure: false,
     changeOrigin: true, //开启代理
     pathRewrite: {
      '^/api': '/',
     },
    },
   }
  },
  plugins: [
   new webpack.ProvidePlugin({
          UTILS: [path.resolve(__dirname, './src/utils/Utils.js'), 'default'], // 定义的全局函数类
    TOAST: [path.resolve(__dirname, './src/utils/Toast.js'), 'default'], // 定义的全局Toast弹框方法
    LOADING: [path.resolve(__dirname, './src/utils/Loading.js'), 'default'] // 定义的全局Loading方法
        })
  ]
 }
}

module.exports = {
  root: true,
  parserOptions: {
    parser: 'babel-eslint',
    sourceType: 'module'
  },
  env: {
    browser: true,
    node: true,
    es6: true,
  },
  "globals":{
    "UTILS": true,
    "TOAST": true,
    "LOADING": true
  }
  // ...省略N行ESlint的配置
}

computed: {
 playCount() {
  return (num) => {
   // UTILS是定义的全局函数类
   const count = UTILS.tranNumber(num, 0)
   return count
  }
 }
}