text: 'use strict'
  const path = require('path')
  const defaultSettings = require('./src/settings.js')
  
  function resolve(dir) {
    return path.join(__dirname, dir)
  }
  
  const name = defaultSettings.title || 'vue Admin Template' // page title
  
  // If your port is set to 80,
  // use administrator privileges to execute the command line.
  // For example, Mac: sudo npm run
  // You can change the port by the following methods:
  // port = 9528 npm run dev OR npm run dev --port = 9528
  const port = process.env.port || process.env.npm_config_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: false,
    // productionSourceMap: false,
    devServer: {
      port:8180,
      open: true
    },
    // devServer: {
    //   open: true,
    //   proxy: {
    //     '/api': {
    //       target: 'http://192.168.0.254:8081',//代理地址也就是服务器地址，这里设置的地址会代替axios中设置的baseURL
    //       changeOrigin: true,// 如果接口跨域，需要进行这个参数配置
    //       pathRewrite:{
    //         '^/api/':''
    //       }
    //     }
    //   }
    // },
  
    /* before: require('./mock/mock-server.js') */
    // },
    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'),
          // 'vendor':path.resolve(__dirname, '…/src/vendor'),//新增加一行
        }
      }
    },
    chainWebpack(config) {
      // it can improve the speed of the first screen, it is recommended to turn on preload
      config.plugin('preload').tap(() => [
        {
          rel: 'preload',
          // to ignore runtime.js
          // https://github.com/vuejs/vue-cli/blob/dev/packages/@vue/cli-service/lib/config/app.js#L171
          fileBlacklist: [/\.map$/, /hot-update\.js$/, /runtime\..*\.js$/],
          include: 'initial'
        }
      ])
  
      // when there are many pages, it will cause too many meaningless requests
      config.plugins.delete('prefetch')
  
      // 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()
  
      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
            }
          }
        })
        // https:// webpack.js.org/configuration/optimization/#optimizationruntimechunk
        config.optimization.runtimeChunk('single')
      })
    }
  }
  