"scripts": {
  ...
  "build-outCMP": "node build/build-out-components.js"
 },

'use strict'
require('./check-versions')()

process.env.NODE_ENV = 'production'

const ora = require('ora')
const path = require('path')
const chalk = require('chalk')
const webpack = require('webpack')
const webpackConfig = require('./webpack.out-components.prod.conf')

const spinner = ora('building for sync-components...')
spinner.start()

webpack(webpackConfig, function (err, stats) {
 spinner.stop()
 if (err) throw err
 process.stdout.write(stats.toString({
  colors: true,
  modules: false,
  children: false,
  chunks: false,
  chunkModules: false
 }) + '\n\n')

 if (stats.hasErrors()) {
  console.log(chalk.red(' Build failed with errors.\n'))
  process.exit(1)
 }

 console.log(chalk.cyan(' Build complete.\n'))
 console.log(chalk.yellow(
  ' Tip: built files are meant to be served over an HTTP server.\n' +
  ' Opening index.html over file:// won\'t work.\n'
 ))
})

const webpack = require('webpack');
const path = require('path');
const utils = require('./utils');
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const {entry, mkdirsSync} = require('./out-components-tools')

function resolve(dir) {
 return path.join(__dirname, '..', dir)
}

mkdirsSync(resolve('/static/outComponents'))

module.exports = {
 entry: entry,
 output: {
  path: resolve('/static/outComponents'),
  filename: '[name].js',
 },
 resolve: {
  extensions: ['.js', '.vue', '.json'],
  alias: {
   'vue$': 'vue/dist/vue.esm.js',
   '@': resolve('src'),
  }
 },
 externals: {
  vue: 'vue',
  axios: 'axios'
 },
 module: {
  rules: [
   {
    test: /\.vue$/,
    loader: 'vue-loader',
    options: {
     esModule: false, // vue-loader v13 更新 默認值為 true v12及之前版本為 false, 此項配置影響 vue 自身異步組件寫法以及 webpack 打包結果
     loaders: utils.cssLoaders({
      sourceMap: true,
      extract: false     // css 不做提取
     }),
     transformToRequire: {
      video: 'src',
      source: 'src',
      img: 'src',
      image: 'xlink:href'
     }
    }
   },
   {
    test: /\.js$/,
    loader: 'babel-loader',
    include: [resolve('src'), resolve('test')]
   },
   {
    test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
    loader: 'url-loader',
    options: {
     limit: 10000,
     name: utils.assetsPath('img/[name].[hash:7].[ext]')
    }
   },
   {
    test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
    loader: 'url-loader',
    options: {
     limit: 10000,
     name: utils.assetsPath('media/[name].[hash:7].[ext]')
    }
   },
   {
    test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
    loader: 'url-loader',
    options: {
     limit: 10000,
     name: utils.assetsPath('fonts/[name].[hash:7].[ext]')
    }
   }
  ]
 },
 plugins: [
  new webpack.DefinePlugin({
   'process.env.NODE_ENV': '"production"'
  }),
  // UglifyJs do not support ES6+, you can also use babel-minify for better treeshaking: https://github.com/babel/minify
  new webpack.optimize.UglifyJsPlugin({
   compress: false,
   sourceMap: true
  }),
  // Compress extracted CSS. We are using this plugin so that possible
  // duplicated CSS from different components can be deduped.
  new OptimizeCSSPlugin({
   cssProcessorOptions: {
    safe: true
   }
  })
 ]
};

const glob = require('glob')
const fs = require('fs');
const path = require('path');
// 遍歷要打包的組件
let entry = {}
var moduleSrcArray = glob.sync('./src/out-components/*')
for(var x in moduleSrcArray){
 let fileName = (moduleSrcArray[x].split('/')[3]).slice(0, -4)
 entry[fileName] = moduleSrcArray[x]
}

// 清理文件
function mkdirsSync(dirname) {
 if (fs.existsSync(dirname)) {
  deleteall(dirname)
  return true;
 } else {
  if (mkdirsSync(path.dirname(dirname))) {
   fs.mkdirSync(dirname);
   return true;
  }
 }
}
// 刪除文件下的文件
function deleteall(path) {
 var files = [];
 if(fs.existsSync(path)) {
  files = fs.readdirSync(path);
  files.forEach(function(file, index) {
   var curPath = path + "/" + file;
   if(fs.statSync(curPath).isDirectory()) { // recurse
    deleteall(curPath);
   } else { // delete file
    fs.unlinkSync(curPath);
   }
  });
 }
};

exports.entry = entry
exports.mkdirsSync = mkdirsSync

 created () {
    if (!this.$root.eventBus) {
     this.$root.eventBus = new Vue()
    }
   }

 <template>
   <div class="test1">
    這是一個外部組件a1
    <hello-word></hello-word>
   </div>
    </template>
  
  <script>
  import helloWord from '../components/HelloWorld'
  export default {
   data () {
    return {
     i: 0
    }
   },
   components: {
    helloWord
   },
   mounted () {
    setInterval(() => {
     this.i++
     if (this.i < 10) {
      this.test()
     }
    }, 1000)
   },
   methods: {
    test () {
     this.$root.eventBus.$emit('childEvent', this.i)
    }
   }
  }
  </script>

 <template>
   <div class="test1">
    這也是外部組件哦
    <div >
     這是a1傳來的{{a1}}
    </div>
   </div>
  </template>
  
  <script>
  export default {
   data () {
    return {
     a1: 0
    }
   },
   created () {
    this.$root.eventBus.$on('childEvent', this.change)
   },
   methods: {
    change (i) {
     this.a1 = i
    }
   }
  }
  </script>