A : Webpack

Wabpack

install

$ npm install -g webpack
$ npm install -g webpack-dev-server

example file and install webpack-dev-server to package.json

$ npm install --save-dev webpack-dev-sever
$ npm stall --save babel@6.23.0 babel-preset-env@1.6.1 babel-register@6.26.0

and use file .babelrc

{
  "preset": "env"
}

webpack.config.babel.js

import webpack from 'webpack'
import HtmlWebpackPlugin from 'html-webpack-plugin'
import path from 'path'

export default {
    context: path.resolve(__dirname),
    entry: {
        app: './src'
    },
    output: {
        path: path.resolve(__dirname,'./dist'),
        filename: 'bundle.js',
        publicPath: '/'
    },
    resolve: {
        extensions: ['.js','.vue']
    },
    module: {
        rules: [{
            test: /\.js$/,
            loader: 'babel-loader',
            include: [path.join(__dirname,'..','./src')]
        },
        {
            test: /\.vue$/,
            loader: 'vue-loader'
        }]
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        new HtmlWebpackPlugin({
            template: 'index.html',
            inject: true
        })
    ],
    devServer: {
        inline: true
    }
}