:.
│  .babelrc             #babel的规则以及插件
│  .editorconfig        #IDE/编辑器相关的配置
│  .eslintignore        #Eslint忽视的目录
│  .eslintrc.js         #Eslint的规则和插件
│  .gitignore           #Git忽视的目录
│  .postcssrc.js        #postcss的插件
│  package-lock.json
│  package.json         #项目相关的包
│  README.md
│  yarn.lock
│
├─build                 #webpack相关的配置
│      utils.js         #webpack配置中的通用方法
│      webpack.base.conf.js #webpack的基础配置
│      webpack.dev.conf.js  #webpack的开发环境配置
│      webpack.prod.conf.js #webpack的生产环境配置
│
└─src                   #主目录，业务代码
    │  app.css
    │  App.js
    │  favicon.ico
    │  index.ejs
    │  index.js
    │
    └─assets            #静态目录，存放静态资源
        │  config.json
        │
        └─img
                logo.svg

yarn add eslint eslint-loader eslint-config-airbnb eslint-plugin-import eslint-friendly-formatter eslint-plugin-flowtype eslint-plugin-jsx-a11y eslint-plugin-react babel-polyfill webpack jest webpack-merge copy-webpack-plugin html-webpack-plugin friendly-errors-webpack-plugin webpack-dev-server webpack-bundle-analyzer webpack-cli portfinder extract-text-webpack-plugin node-notifier optimize-css-assets-webpack-plugin autoprefixer mini-css-extract-plugin autoprefixer css-loader less-loader postcss-loader postcss-import postcss-loader style-loader babel-core babel-eslint babel-loader babel-plugin-transform-runtime babel-plugin-import babel-preset-env babel-preset-react babel-polyfill url-loader cross-env file-loader -D

module.exports = {
  context: path.resolve(__dirname, '../'),  //绝对路径。__dirname为当前目录。
    //基础目录用于从配置中解析入口起点。因为webpack配置在build下，所以传入 '../'
  entry: {
    app: ('./src/index.js') //项目的入口
  },
  output: {
    path: path.resolve(__dirname, '../dist'),
    filename: '[name].[hash:8].js',
    publicPath: '/',
    libraryTarget: 'umd',
  },
}

// entry为字符串
{
    entry: './src/index.js',
    output: {
        path: '/dist',
        filename: 'bundle.js'
    }
}
// 结果会生成 '/dist/bundle.js'

// entry为数组，可以添加多个彼此不互相依赖的文件。结合output.library选项，如果传入数组，则只导出最后一项。
{
    //如果你在html文件里引入了'bable-polyfill',可以通过数组将它加到bundle.js的最后。
    entry: ['./src/index.js', 'babel-polyfill'] ,
    output:{
        path: '/dist',
        filename: 'bundle.js'
    }
}

// entry为对象，可以将页面配置为多页面的而不是SPA，有多个html文件。通过对象告诉webpack为每个入口，成一个bundle文件。
// 多页面的配置，可能还要借助于HtmlWebpackPlugin，来指定每个html需要引入的js
{
    entry: {
        index: './src/index.js'
        main: './src/index.js'
        login: './src/login.js'
    }
    output:{
        path: '/dist/pages'
        filename: '[name]-[hash:5].js' //文件名取自'entry'对象的键名，为了防止推送代码后浏览器读缓存，故再生成的文件之后加上hash码。
    }
}
// 会分别生成index.js,main.js,login.js三个文件

// entry也可以传入混合类型
{
    entry:{
        vendor: ['jquery','amap','babel-polyfill'] //也可以借助CommonsChunkPlugin提取vendor的chunk。
        index: './src/index.js'
    }
    output: {
        path: '/dist'
        filename: '[name]-[hash:5].js'
    }
}

 output: {
    path: path.resolve(__dirname, '../dist'),
    filename: '[name].[hash:8].js',
    publicPath: '/',
  },

resolve: {
    // 自动解析文件扩展名(补全文件后缀)(从左->右)
    // import hello from './hello'  （!hello.js? -> !hello.jsx? -> !hello.json）
    extensions: ['.js', '.jsx', '.json'],
    alias: {
      '@': resolve('src')
    }
  },

noParse: function(content) {
  return /jquery|lodash/.test(content);
}

module: {
    rules: [
    {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        enforce: 'pre',
        use: [{
          loader: 'babel-loader',
        }, {
          loader: 'eslint-loader', // 指定启用eslint-loader
          options: {
            formatter: require('eslint-friendly-formatter'),
            emitWarning: false
          }
        }]
      },
    {
        test: /\.css$/,
        include: /node_modules/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: () => [autoprefixer({ browsers: 'last 5 versions' })],
              sourceMap: false,
            },
          },
        ],
      },
      {
        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: ('assets/img/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: ('assets/media/[name].[hash:7].[ext]')
        }
      },
      {
        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: ('assets/fonts/[name].[hash:7].[ext]')
        }
      }
    ]
    }

// package.json
"scripts": {
    "start": "webpack-dev-server --mode development --config build/webpack.dev.conf.js",
}
// 设置当前的mode为development，同样这个配置也可以写在webpack.dev.conf.js中。然后使用build目录下的webpack.dev.conf.js 来配置相关的webpack。

devServer: {
    clientLogLevel: 'warning',
    historyApiFallback: true, //在开发单页应用时非常有用，它依赖于HTML5 history API，如果设置为true，所有的跳转将指向index.html
    contentBase: path.resolve(__dirname, '../src'),
    compress: true,
    hot: true, // 热加载
    inline: true, //自动刷新
    open: true, //自动打开浏览器
    host: HOST||'localhost',
    port: PORT,
    overlay: { warnings: false, errors: true }, // 在浏览器上全屏显示编译的errors或warnings。
    publicPath: '/',
    proxy: {},
    quiet: true, // necessary for FriendlyErrorsPlugin // 终端输出的只有初始启动信息。 webpack 的警告和错误是不输出到终端的
    watchOptions: {
      poll: false
    }
  },
  plugins: [
    new webpack.DefinePlugin({
      ...process.env
    }),
    //开启HMR(热替换功能,替换更新部分,不重载页面！)
    new webpack.HotModuleReplacementPlugin(),// HMR shows correct file names in console on update.
    //显示模块相对路径
    new webpack.NamedModulesPlugin(),
    //不显示错误信息
    new webpack.NoEmitOnErrorsPlugin(),
    // https://github.com/ampedandwired/html-webpack-plugin
    ]

// 设置代码分离的输出目录
output: {
    path: path.resolve(__dirname, '../dist'),
    filename: ('js/[name].[hash:8].js'),
    chunkFilename: ('js/[name]-[id].[hash:8].js')
  },
 // 代码分离
 optimization: {
    runtimeChunk: {
      name: "manifest"
    },
    splitChunks: {
      chunks: 'all'
    }
  },

new MiniCssExtractPlugin({
      filename: 'css/[name].[hash:8].css',
      chunkFilename: 'css/[name]-[id].[hash:8].css',
    }),

new HtmlWebpackPlugin({
      filename: 'index.html',
      template: './src/index.ejs', // 设置目录
      title: 'React Demo',
      inject: true, // true->'head' || false->'body'
      minify: {
        //删除Html注释
        removeComments: true,
        //去除空格
        collapseWhitespace: true,
        //去除属性引号
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
    }),

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="robots" content="noindex, nofollow">

  <title><%= htmlWebpackPlugin.options.title %></title>
  <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
  <link rel="icon" href="/favicon.ico" type="image/x-icon">

  <% for (var chunk in htmlWebpackPlugin.files.css) { %>
  <link rel="preload" href="<%= htmlWebpackPlugin.files.css[chunk] %>"  as="style">
  <% } %>
  <% for (var chunk in htmlWebpackPlugin.files.chunks) { %>
  <link rel="preload" href="<%= htmlWebpackPlugin.files.chunks[chunk].entry %>" as="script">
  <% } %>

  <base href="/">
</head>
<body>
<p id="root"></p>
</body>
<style type="text/css">
  body {
    font-family: &#39;Source Sans Pro&#39;,&#39;Helvetica Neue&#39;,Helvetica,Arial,sans-serif;
  }
</style>
</html>

new CopyWebpackPlugin([{
      from: './src/assets/',
      to: 'assets'
    }]),

// webpack.prod.conf.js
const BundleAnalyzerPlugin = process.env.NODE_ENV=== 'analysis' ? require('webpack-bundle-analyzer').BundleAnalyzerPlugin:null
process.env.NODE_ENV=== 'analysis' ? new BundleAnalyzerPlugin() : ()=>{}

"scripts": {
    "analysis": "cross-env NODE_ENV=analysis webpack -p --mode production --progress --config ./build/webpack.prod.conf.js ",
  },

// usage: https://www.npmjs.com/package/node-ssh
var path, node_ssh, ssh, fs, opn, host

fs = require('fs')
path = require('path')
node_ssh = require('node-ssh')
opn = new require('opn')
ssh = new node_ssh()
host = 'localhost'
var localDir = './dist'
var remoteDir = '/opt/frontend/new'
var removeCommand = 'rm -rf ./*'
var pwdCommand = 'pwd'

ssh.connect({
  host: host,
  username: 'root',
  port: 22,
  // password,
  privateKey: "./.ssh/id_rsa",
})
  .then(function() {
    ssh.execCommand(removeCommand, { cwd:remoteDir }).then(function(result) {
      console.log('STDOUT: ' + result.stdout)
      console.log('STDERR: ' + result.stderr)
      ssh.putDirectory(localDir, remoteDir).then(function() {
        console.log("The File thing is done")
        ssh.dispose()
        opn('http://'+host, {app:['chrome']})
      }, function(error) {
        console.log("Something's wrong")
        console.log(error)
        ssh.dispose()
      })
    })
  })

"scripts": {
    "depoly": "npm run build && node ./deploy.js",
}