vue.config.js

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

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

const name = '管理系统' // 标题

module.exports = {
  publicPath: './',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development' ? 'error' : false, // 生成环境取消 eslint 验证
  productionSourceMap: false,
  devServer: {
    hot: true,
    hotOnly: true,
    open: false, // 自动打开浏览器
    port: '7002', // 端口
    https: false, // 启用https
    // 可以通过设置让浏览器 overlay 同时显示警告和错误
    overlay: {
      warnings: process.env.NODE_ENV === 'development',
      errors: process.env.NODE_ENV === 'development'
    }
  },
  configureWebpack: {
    name,
    resolve: {
      alias: {
        '@': resolve('src')
      }
    }
  },
  // css: {
  //   loaderOptions: {
  //     sass: {
  //       prependData: `@import "@/assets/styles/variables.scss";`
  //     }
  //   }
  // },
  chainWebpack(config) {
    config.plugins.delete('preload')
    config.plugins.delete('prefetch')
    // 全局变量
    config.plugin('define')
      .tap(args => {
        args[0].ISPROD = process.env.NODE_ENV === 'production'
        return args
      })
    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/assets/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/assets/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
              }
            }
          })
          config.optimization.runtimeChunk('single', {
            from: path.resolve(__dirname, './public/robots.txt'), // 防爬虫文件
            to: './' // 到根目录下
          })
        }
      )
  }
}