Vue CLI 2.x搭建vue(目录最全分析)

pm install -g vue-cli

pm update vue-cli

vue -V

pm view vue-cli

vue init webpack <Project Name>

'use strict'
require('./check-versions')() //调用版本检查

process.env.NODE_ENV = 'production' //将环境配置为生产环境
const ora = require('ora') //npm包 loading插件
const rm = require('rimraf') //npm包 用于删除文件
const path = require('path')//npm包 文件路径工具
const chalk = require('chalk')//npm包 在终端输出带颜色的文字
const webpack = require('webpack')//引入webpack.js
const config = require('../config')//引入配置文件
const webpackConfig = require('./webpack.prod.conf')//引入生产环境配置文件
// 在终端显示loading效果，并输出提示
const spinner = ora('building for production...')
spinner.start()
//先递归删除dist文件再生成新文件，避免冗余
rm(path.join(config.build.assetsRoot, config.build.assetsSubDirectory), err => {
 if (err) throw err
 webpack(webpackConfig, (err, stats) => {
  spinner.s()
  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 plete.\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'
  ))
 })
})

'use strict'
const chalk = require('chalk')
const semver = require('semver')//检查版本
const packageConfig = require('../package.json')
const shell = require('shelljs')//shelljs 模块重新包装了 child_process，调用系统命令更加方便

function exec (cmd) {//返回通过child_process模块的新建子进程，执行 Unix 系统命令后转成没有空格的字符串
 return require('child_process').execSync(cmd).toString().trim()
}

const versionRequirements = [
 {
  name: 'node',
  currentVersion: semver.clean(process.version),//使用semver格式化版本
  versionRequirement: packageConfig.engines.node //获取package.json中设置的node版本
 }
]

if (shell.which('npm')) {
 versionRequirements.push({
  name: 'npm',
  currentVersion: exec('npm --version'),// 自动调用npm --version命令，并且把参数返回给exec函数，从而获取纯净的版本号
  versionRequirement: packageConfig.engines.npm
 })
}

module.exports = function () {
 const warnings = []
 for (let i = 0; i < versionRequirements.length; i++) {
  const mod = versionRequirements[i]
  //若版本号不符合package.json文件中指定的版本号，就报错
  if (!semver.satisfies(mod.currentVersion, mod.versionRequirement)) {
   warnings.push(mod.name + ': ' +
    chalk.red(mod.currentVersion) + ' should be ' +
    chalk.green(mod.versionRequirement)
   )
  }
 }

 if (warnings.length) {
  console.log('')
  console.log(chalk.yellow('To use this template, you must update following to modules:'))
  console.log()
  for (let i = 0; i < warnings.length; i++) {
   const warning = warnings[i]
   console.log(' ' + warning)
  }
  console.log()
  process.exit(1)
 }
}

var path = require('path')// node自带的文件路径工具
var config = require('../config')// 配置文件
var ExtractTextPlugin = require('extract-text-webpack-plugin')// 提取css的插件

/ @method assertsPath 生成静态资源的路径(判断开发环境和生产环境,为config文件中index.js文件中定义assetsSubDirectory)
  @param {String}  _path 相对于静态资源文件夹的文件路径
  @return {String}     静态资源完整路径
 /
exports.assetsPath = function (_path) {
 var assetsSubDirectory = process.env.NODE_ENV === 'production'
  ? config.build.assetsSubDirectory
  : config.dev.assetsSubDirectory
 //nodeJs path提供用于处理文件路径的工具;path.posix提供对路径方法的POSIX(可移植性操作系统接口)特定实现的访问(可跨平台); path.posix.join与path.join一样，不过总是以 posix 兼容的方式交互
 return path.posix.join(assetsSubDirectory, _path)
}

/@method cssLoaders 生成处理css的loaders配置,使用css-loader和postcssLoader,通过options.usePostCSS属性来判断是否使用postcssLoader中压缩等方法
  @param {Object} option = {sourceMap: true,// 是否开启 sourceMapextract: true // 是否提取css}生成配置
  @return {Object} 处理css的loaders配置对象
 /
exports.cssLoaders = function (options) {
 options = options || {}

 var cssLoader = {
  loader: 'css-loader',
  options: {
   minimize: process.env.NODE_ENV === 'production',
   sourceMap: options.sourceMap
  }
 }
 /@method generateLoaders 生成 ExtractTextPlugin对象或loader字符串
   @param {Array}    loaders loader名称数组
   @return {String|Object}    ExtractTextPlugin对象或loader字符串
  /
 function generateLoaders (loader, loaderOptions) {
  var loaders = [cssLoader]
  if (loader) {
   loaders.push({  
    loader: loader + '-loader',
    options: Object.assign({}, loaderOptions, {
     sourceMap: options.sourceMap
    })
   })
  }
  // ExtractTextPlugin提取css(当上面的loaders未能正确引入时,使用vue-style-loader)
  if (options.extract) {// 生产环境中，默认为true
   return ExtractTextPlugin.extract({
    use: loaders,
    fallback: 'vue-style-loader'
   })
  } else {//返回vue-style-loader连接loaders的最终值
   return ['vue-style-loader'].concat(loaders)
  }
 }

 return {
  css: generateLoaders(),//需要css-loader 和 vue-style-loader
  postcss: generateLoaders(),//需要css-loader、postcssLoader 和 vue-style-loader
  less: generateLoaders('less'),//需要less-loader 和 vue-style-loader
  sass: generateLoaders('sass', { indentedSyntax: true }),//需要sass-loader 和 vue-style-loader
  scss: generateLoaders('sass'),//需要sass-loader 和 vue-style-loader
  stylus: generateLoaders('stylus'),//需要stylus-loader 和 vue-style-loader
  styl: generateLoaders('stylus')//需要stylus-loader 和 vue-style-loader
 }
}
 
/@method styleLoaders 生成 style-loader的配置
  @param {Object}   options 生成配置
  @return {Array}   style-loader的配置
 /
exports.styleLoaders = function (options) {
 var output = []
 var loaders = exports.cssLoaders(options)
 //将各种css,less,sass等综合在一起得出结果输出output
 for (var extension in loaders) {
  var loader = loaders[extension]
  output.push({
   test: new RegExp('\\.' + extension + '$'),
   use: loader
  })
 }
 return output
}

'use strict'
const utils = require('./utils')
const config = require('../config')
const isProduction = process.env.NODE_ENV === 'production'
//生产环境,提取css样式到单独文件
const sourceMapEnabled = isProduction
 ? config.build.productionSourceMap
 : config.dev.cssSourceMap
module.exports = {
 loaders: utils.cssLoaders({
  sourceMap: sourceMapEnabled,
  extract: isProduction
 }),
 cssSourceMap: sourceMapEnabled,
 cacheBusting: config.dev.cacheBusting,
 //编译时将“引入路径”转换为require调用,使其可由webpack处理
 transformToRequire: {
  video: ['src', 'poster'],
  source: 'src',
  img: 'src',
  image: 'xlink:href'
 }
}

'use strict'
const path = require('path')// node自带的文件路径工具
const utils = require('./utils')// 工具函数集合
const config = require('../config')// 配置文件
const vueLoaderConfig = require('./vue-loader.conf')// 工具函数集合
/
  获取"绝对路径"
  @method resolve
  @param {String} dir 相对于本文件的路径
  @return {String}   绝对路径
 /
function resolve(dir) {
 return path.join(__dirname, '..', dir)
}

module.exports = {
 context: path.resolve(__dirname, '../'),
 //入口js文件(默认为单页面所以只有app一个入口)
 entry: {
  app: './src/main.js'
 },
 //配置出口
 output: {
  path: config.build.assetsRoot,//打包编译的根路径(dist)
  filename: '[name].js',
  publicPath: process.env.NODE_ENV === 'production'
   ? config.build.assetsPublicPath
   : config.dev.assetsPublicPath//发布路径
 },
 resolve: {
  extensions: ['.js', '.vue', '.json'],// 自动补全的扩展名
  //别名配置
  alias: {
   'vue$': 'vue/dist/vue.esm.js',
   '@': resolve('src'),// eg:"src/ponents" => "@/ponents"
  }
 },
 module: {
  rules: [
   //使用vue-loader将vue文件编译转换为js
   {
    test: /\.vue$/,
    loader: 'vue-loader',
    options: vueLoaderConfig
   },
   //通过babel-loader将ES6编译压缩成ES5
   {
    test: /\.js$/,
    loader: 'babel-loader',
    include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
   },
   //使用url-loader处理(图片、音像、字体)，超过10000编译成base64
   {
    test: /\.(png|jpe?g|gif|svg)(\?.)?$/,
    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]')
    }
   }
  ]
 },
 //nodeJs全局变量/模块，防止webpack注入一些nodeJs的东西到vue中
 node: {
  setImmediate: false,
  dgram: 'empty',
  fs: 'empty',
  : 'empty',
  tls: 'empty',
  child_process: 'empty'
 }
}

'use strict'
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')//webpack-merge实现合并
const path = require('path')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')//webpack的提示错误和日志信息的插件
const portfinder = require('portfinder')// 查看空闲端口位置，默认情况下搜索8000这个端口

const HOST = process.env.HOST
const PORT = process.env.PORT && Number(process.env.PORT)

const devWebpackConfig = merge(baseWebpackConfig, {
 module: {
  rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
 },
 devtool: config.dev.devtool,//调试模式
 devServer: {
  clientLogLevel: 'warning',
  historyApiFallback: {//使用 HTML5 History API 时， 404 响应替代为 index.html
   rewrites: [
    { from: /./, to: path.posix.join(config.dev.assetsPublicPath, 'index.html') },
   ],
  },
  hot: true,//热重载
  contentBase: false, // 提供静态文件访问
  press: true,//压缩
  host: HOST || config.dev.host,
  port: PORT || config.dev.port,
  open: config.dev.autoOpenBrowser,//npm run dev 时自动打开浏览器
  overlay: config.dev.errorOverlay
   ? { warnings: false, errors: true }
   : false,// 显示warning 和 error 信息
  publicPath: config.dev.assetsPublicPath,
  proxy: config.dev.proxyTable,//api代理
  quiet: true, //控制台打印警告和错误(用FriendlyErrorsPlugin 为 true)
  watchOptions: {// 检测文件改动
   poll: config.dev.poll,
  }
 },
 plugins: [
  new webpack.DefinePlugin({
   'process.env': require('../config/dev.env')
  }),
  new webpack.HotModuleReplacementPlugin(),//模块热替换插件，修改模块时不需要刷新页面
  new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
  new webpack.NoEmitOnErrorsPlugin(),//webpack编译错误的时候，中断打包进程，防止错误代码打包到文件中
  // 将打包编译好的代码插入index.html
  new HtmlWebpackPlugin({
   filename: 'index.html',
   template: 'index.html',
   inject: true
  }),
  // 提取static assets 中css 复制到dist/static文件
  new CopyWebpackPlugin([
   {
    from: path.resolve(__dirname, '../static'),
    to: config.dev.assetsSubDirectory,
    ignore: ['.']//忽略.的文件
   }
  ])
 ]
})

module.exports = new Promise((resolve, reject) => {
 portfinder.basePort = process.env.PORT || config.dev.port
 portfinder.getPort((err, port) => { //查找端口号
  if (err) {
   reject(err)
  } else {
   //端口被占用时就重新设置evn和devServer的端口
   process.env.PORT = port
   devWebpackConfig.devServer.port = port
   // npm run dev成功的友情提示
   devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
    pilationSuessInfo: {
     messages: [`Your application is running here: http://${devWebpackConfig.devServer.host}:${port}`],
    },
    onErrors: config.dev.notifyOnErrors
    ? utils.createNotifierCallback()
    : undefined
   }))
   resolve(devWebpackConfig)
  }
 })
})

'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

const env = require('../config/prod.env')

const webpackConfig = merge(baseWebpackConfig, {
 module: {
  rules: utils.styleLoaders({
   sourceMap: config.build.productionSourceMap,
   extract: true,
   usePostCSS: true
  })
 },
 devtool: config.build.productionSourceMap ? config.build.devtool : false,//是否开启调试模式
 output: {
  path: config.build.assetsRoot,
  filename: utils.assetsPath('js/[name].[chunkhash].js'),
  chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
 },
 plugins: [
  new webpack.DefinePlugin({
   'process.env': env
  }),
  new UglifyJsPlugin({//压缩js
   uglifyOptions: {
    press: {
     warnings: false
    }
   },
   sourceMap: config.build.productionSourceMap,
   parallel: true
  }),
  new ExtractTextPlugin({//提取静态文件，减少请求
   filename: utils.assetsPath('css/[name].[contenthash].css'),
   allChunks: true,
  }),
  new OptimizeCSSPlugin({//提取优化压缩后(删除来自不同组件的冗余代码)的css
   cssProcessorOptions: config.build.productionSourceMap
    ? { safe: true, map: { inline: false } }
    : { safe: true }
  }),
  new HtmlWebpackPlugin({ //html打包压缩到index.html
   filename: config.build.index,
   template: 'index.html',
   inject: true,
   minify: {
    removeComments: true,//删除注释
    collapseWhitespace: true,//删除空格
    removeAttributeQuotes: true//删除属性的引号
   },
   chunksSortMode: 'dependency'//模块排序，按照我们需要的顺序排序
  }),

  new webpack.HashedModuleIdsPlugin(),
  new webpack.optimize.ModuleConcatenationPlugin(),
  new webpack.optimize.CommonsChunkPlugin({  // node_modules中的任何所需模块都提取到vendor
   name: 'vendor',
   minChunks (module) {
    return (
     module.resource &&
     /\.js$/.test(module.resource) &&
     module.resource.indexOf(
      path.join(__dirname, '../node_modules')
     ) === 0
    )
   }
  }),
  new webpack.optimize.CommonsChunkPlugin({
   name: 'manifest',
   minChunks: Infinity
  }),
  new webpack.optimize.CommonsChunkPlugin({
   name: 'app',
   async: 'vendor-async',
   children: true,
   minChunks: 3
  }),
  new CopyWebpackPlugin([//复制static中的静态资源（默认到dist里面）
   {
    from: path.resolve(__dirname, '../static'),
    to: config.build.assetsSubDirectory,
    ignore: ['.']
   }
  ])
 ]
})

if (config.build.productionGzip) {
 const CompressionWebpackPlugin = require('pression-webpack-plugin')

 webpackConfig.plugins.push(
  new CompressionWebpackPlugin({
   asset: '[path].gz[query]',
   algorithm: 'gzip',
   test: new RegExp(
    '\\.(' +
    config.build.productionGzipExtensions.join('|') +
    ')$'
   ),
   threshold: 10240,
   minRatio: 0.8
  })
 )
}

if (config.build.bundleAnalyzerReport) {
 const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
 webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}

module.exports = webpackConfig

'use strict'
const merge = require('webpack-merge')
const prodEnv = require('./prod.env')

module.exports = merge(prodEnv, {
 NODE_ENV: '"development"'
})

'use strict'
module.exports = {
 NODE_ENV: '"production"'
}

process.env.属性名

'use strict';
const path = require('path');

module.exports = {

 // ===================开发环境配置

 dev: {
  assetsSubDirectory: 'static',//静态资源文件夹(一般存放css、js、image等文件)
  assetsPublicPath: '/',//根目录
  proxyTable: {},//配置API代理，可利用该属性解决跨域的问题
  host: 'localhost', // 可以被 process.env.HOST 覆盖
  port: 3030, // 可以被 process.env.PORT 覆盖
  autoOpenBrowser: true,//编译后自动打开浏览器页面 http://localhost:3030/("port + host",默认"false"),设置路由重定向自动打开您的默认页面
  errorOverlay: true,//浏览器错误提示
  notifyOnErrors: true,//跨平台错误提示
  poll: false, //webpack提供的使用文件系统(file system)获取文件改动的通知devServer.watchOptions(监控文件改动)
  devtool: 'cheap-module-eval-source-map',//webpack提供的用来调试的模式，有多个不同值代表不同的调试模式
  cacheBusting: true,// 配合devtool的配置，当给文件名插入新的hash导致清除缓存时是否生成source-map
  cssSourceMap: true //记录代码压缩前的位置信息,当产生错误时直接定位到未压缩前的位置,方便调试
 },

// ========================生产环境配置

 build: {
  index: path.resolve(__dirname, '../dist/index.html'),//编译后"首页面"生成的绝对路径和名字
  assetsRoot: path.resolve(__dirname, '../dist'),//打包编译的根路径(默认dist，存放打包压缩后的代码)
  assetsSubDirectory: 'static',//静态资源文件夹(一般存放css、js、image等文件)
  assetsPublicPath: '/',//发布的根目录(dist文件夹所在路径)
  productionSourceMap: true,//是否开启source-map
  devtool: '#source-map',//(详细参见https://webpack.docschina./configuration/devtool)
  productionGzip: false,//是否压缩
  productionGzipExtensions: ['js', 'css'],//unit的gzip命令用来压缩文件（gzip模式下需要压缩的文件的扩展名有js和css）
  bundleAnalyzerReport: process.env.npm_config_report //是否开启打包后的分析报告
 }
};