vue.config.js

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


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

//const name = 'test' // page title
// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
const port = 9528 // dev port

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {

  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  publicPath: '/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,
  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    proxy: null
  },
  configureWebpack: {

    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    // name: name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    },
    output: {
      libraryExport: 'default'
    }
    // externals: {
    //   'vue': 'Vue',
    //   'element-ui': 'ELEMENT',
    // },
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test
    // config
    //   // 插件名 
    //   .plugin('extract-css')
    //   // 修改规则
    //   .tap(args => {
    //     args[0].filename = 'css/styles.css'
    //     args[0].chunkFilename = 'css/[name].css'
    //     return args
    //   })
    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()
    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
      // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    // config
    //   .when(process.env.NODE_ENV !== 'development',
    //     config => {
    //       config
    //         .plugin('ScriptExtHtmlWebpackPlugin')
    //         .after('html')
    //         .use('script-ext-html-webpack-plugin', [{
    //           // `runtime` must same as runtimeChunk name. default is `runtime`
    //           inline: /runtime\..*\.js$/
    //         }])
    //         .end()
    //       config
    //         .optimization.splitChunks({
    //           chunks: 'all',
    //           cacheGroups: {
    //             libs: {
    //               name: 'chunk-libs',
    //               test: /[\\/]node_modules[\\/]/,
    //               priority: 10,
    //               chunks: 'initial' // only package third parties that are initially dependent
    //             },
    //             elementUI: {
    //               name: 'chunk-elementUI', // split elementUI into a single package
    //               priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
    //               test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
    //             },
    //             commons: {
    //               name: 'chunk-commons',
    //               test: resolve('src/components'), // can customize your rules
    //               minChunks: 3, //  minimum common number
    //               priority: 5,
    //               reuseExistingChunk: true
    //             }
    //           }
    //         })
    //       config.optimization.runtimeChunk('single')
    //     }
    //   )
  }
}