text: 'use strict'
  const path = require('path')
  const utils = require('./utils')
  const config = require('../config')
  const vueLoaderConfig = require('./vue-loader.conf')
  
  function resolve(dir) {
      return path.join(__dirname, '..', dir)
  }
  
  const createLintingRule = () => ({
      test: /\.(js|vue)$/,
      loader: 'eslint-loader',
      enforce: 'pre',
      include: [resolve('src'), resolve('test')],
      options: {
          formatter: require('eslint-friendly-formatter'),
          emitWarning: !config.dev.showEslintErrorsInOverlay
      }
  })
  
  module.exports = {
      context: path.resolve(__dirname, '../'),
      entry: {
          app: ['babel-polyfill', './src/main.js']
      },
      output: {
          path: config.build.assetsRoot,
          filename: '[name].js',
          publicPath: process.env.NODE_ENV === 'production' ?
              config.build.assetsPublicPath : config.dev.assetsPublicPath
      },
      resolve: {
          extensions: ['.js', '.vue', '.json'],
          alias: {
              'vue$': 'vue/dist/vue.esm.js',
              '@': resolve('src'),
          }
      },
      module: {
          rules: [
              ...(config.dev.useEslint ? [createLintingRule()] : []),
              {
                  test: /\.vue$/,
                  loader: 'vue-loader',
                  options: vueLoaderConfig
              },
              {
                  test: /\.js$/,
                  loader: 'babel-loader',
                  include: [resolve('node_modules/resize-detector/esm'), resolve("src"), resolve('test')]
              },
              {
                  test: /\.svg$/,
                  loader: 'svg-sprite-loader',
                  include: [resolve('src/icons')]
              },
              {
                  test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,
                  loader: 'url-loader',
                  exclude: [resolve('src/icons')],
                  options: {
                      limit: 10000,
                      name: utils.assetsPath('img/[name].[hash:7].[ext]')
                  }
              },
              {
                  test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,
                  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]')
                  }
              }
          ]
      },
      node: {
          // prevent webpack from injecting useless setImmediate polyfill because Vue
          // source contains it (although only uses it if it's native).
          setImmediate: false,
          // prevent webpack from injecting mocks to Node native modules
          // that does not make sense for the client
          dgram: 'empty',
          fs: 'empty',
          net: 'empty',
          tls: 'empty',
          child_process: 'empty'
      },
      // 引入外部库, 无需webpack打包处理
      externals: {
          mockjs: 'Mock',
          echarts: 'echarts',
          ueditor: 'UE'
  
      }
  }