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  • vue.config.js 打包配置文件记录

    vue-cli3优化配置

    1.使用cdn引入不改变的第三方库

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    const cdn = {
  // 忽略打包的第三方库
  externals: {
    vue: 'Vue',
    vuex: 'Vuex',
    'vue-router': 'VueRouter',
    axios: 'axios'
  },

  // 通过cdn方式使用
  js: [
    'https://cdn.bootcss.com/vue/2.6.11/vue.runtime.min.js',
    'https://cdn.bootcss.com/vue-router/3.1.2/vue-router.min.js',
    'https://cdn.bootcss.com/vuex/3.1.2/vuex.min.js',
    'https://cdn.bootcss.com/axios/0.19.2/axios.min.js',
    'https://cdn.bootcss.com/moment.js/2.24.0/moment.min.js',
    'https://cdn.bootcss.com/echarts/3.7.1/echarts.min.js'
  ],

  css: []
}

module.exports = {

    chainWebpack: config => {
        // 配置cdn引入
        config.plugin('html').tap(args => {
          args[0].cdn = cdn
          return args
        })
    }

    configureWebpack: config => {

         // 忽略打包配置
        config.externals = cdn.externals
    }
        
}
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    1.1.public下的html页面引入

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    <!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <link rel="icon" href="<%= BASE_URL %>favicon.ico">
    <title><%= htmlWebpackPlugin.options.title %></title>
  </head>
  <body>
    <noscript>
      <strong>We're sorry but <%= htmlWebpackPlugin.options.title %> doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
    </noscript>
    <div id="app"></div>
    <!--循环引入-->
    <% for (var i in htmlWebpackPlugin.options.cdn && htmlWebpackPlugin.options.cdn.js) { %>
      <script src="<%= htmlWebpackPlugin.options.cdn.js[i] %>" crossorigin="anonymous"></script>
    <% } %>
  </body>
</html>
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    2.移除prefetch插件，避免加载多余的资源

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    module.exports = {

    chainWebpack: config => {

        // 移除prefetch插件，避免加载多余的资源
        config.plugins.delete('prefetch')
    }
}
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    3.定义目录的简写路径

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

module.exports = {


    chainWebpack: config => {

        // 定义文件夹的路径
        config.resolve.alias
          .set('@', resolve('src'))
          .set('assets', resolve('src/assets'))
          .set('components', resolve('src/components'))
          .set('router', resolve('src/router'))
          .set('store', resolve('src/store'))
          .set('views', resolve('src/views'))
    }
}
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    4.压缩图片

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    module.exports = {

    chainWebpack: config => {

        // 压缩图片
        const imagesRule = config.module.rule('images')
        imagesRule.uses.clear()
        imagesRule.use('file-loader')
            .loader('url-loader')
            .options({
             limit: 10240,
             fallback: {
              loader: 'file-loader',
              options: {
                outputPath: 'static/images'
              }
            }
          })
        }
}
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    5.使用gzip压缩

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    // 需要安装插件

npm i compression-webpack-plugin -D

// 引入gzip压缩插件
const CompressionWebpackPlugin = require('compression-webpack-plugin')


module.exports = {


    configureWebpack: config => {

        // 开启gzip压缩
        config.plugins.push(
          new CompressionWebpackPlugin(
            {
              filename: info => {
                return `${info.path}.gz${info.query}`
              },
              algorithm: 'gzip',
              threshold: 10240, // 只有大小大于该值的资源会被处理 10240
              test: new RegExp('\.(' + ['js'].join('|') + ')$'
              ),
              minRatio: 0.8, // 只有压缩率小于这个值的资源才会被处理
              deleteOriginalAssets: false // 删除原文件
            }
          )
        }
    },

    // 需要gzip压缩的文件
   devServer: {
    host: 'localhost',
    port: 8080, // 端口号
    open: false, // 配置自动启动浏览器
    before (app, server) {
      app.get(/.*.(js)$/, (req, res, next) => {
        req.url = req.url + '.gz'
        res.set('Content-Encoding', 'gzip')
        next()
      })
    }
  }
}
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    6.配置全局sass无需再组件中引入即可使用

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    module.exports = {

    css: {
        extract: true,
        sourceMap: false,
        loaderOptions: {
          // 定义全局scss无需引入即可使用
          sass: {
            prependData: `
              @import "@/assets/css/variable.scss";
              @import "@/assets/css/common.scss";
              @import "@/assets/css/mixin.scss";
            `
          }
        }
     },
}
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    7.公共代码抽离

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    module.exports = {

    configureWebpack: config => {
    
        config.optimization = {
          splitChunks: {
            cacheGroups: {
              vendor: {
                chunks: 'all',
                test: /node_modules/,
                name: 'vendor',
                minChunks: 1,
                maxInitialRequests: 5,
                minSize: 0,
                priority: 100
              }
            }
          }
        }
    }
}
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    8.代码压缩去除console.log

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    module.exports = {

    configureWebpack: config => {

        if (process.env.NODE_ENV === 'production') {

            config.plugins.push(
                new TerserPlugin({
                  terserOptions: {
                    ecma: undefined,
                    warnings: false,
                    parse: {},
                    compress: {
                      drop_console: true,
                      drop_debugger: false,
                      pure_funcs: ['console.log'] // 移除console
                    }
                  }
                })
              )
        }
    }
}
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    ## 完整的代码

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    // vue.config.js配置

const path = require('path')

// gzip压缩插件
const CompressionWebpackPlugin = require('compression-webpack-plugin')

// 代码打包之后取出console.log压缩代码
const TerserPlugin = require('terser-webpack-plugin')

// 图形化打包详情
const BundleAnalyzer = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

const cdn = {
  // 忽略打包的第三方库
  externals: {
    vue: 'Vue',
    vuex: 'Vuex',
    'vue-router': 'VueRouter',
    axios: 'axios'
  },
  // 通过cdn方式使用
  js: [
    'https://cdn.bootcss.com/vue/2.6.11/vue.runtime.min.js',
    'https://cdn.bootcss.com/vue-router/3.1.2/vue-router.min.js',
    'https://cdn.bootcss.com/vuex/3.1.2/vuex.min.js',
    'https://cdn.bootcss.com/axios/0.19.2/axios.min.js',
    'https://cdn.bootcss.com/moment.js/2.24.0/moment.min.js',
    'https://cdn.bootcss.com/echarts/3.7.1/echarts.min.js'
  ],
  css: []
}

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

module.exports = {
  // 是否触发eslint检查
  lintOnSave: false,
  publicPath: '/',
  // 打包文件的出口
  outputDir: 'dist',
  // 放置生成的css和js和img和fonts的目录
  assetsDir: 'static',
  // 存放index.html模板的路径
  indexPath: 'static/index.html',
  productionSourceMap: false,
  chainWebpack: config => {
    // 配置cdn引入
    config.plugin('html').tap(args => {
      args[0].cdn = cdn
      return args
    })

    // 移除prefetch插件，避免加载多余的资源
    config.plugins.delete('prefetch')

    // 定义文件夹的路径
    config.resolve.alias
      .set('@', resolve('src'))
      .set('assets', resolve('src/assets'))
      .set('components', resolve('src/components'))
      .set('router', resolve('src/router'))
      .set('store', resolve('src/store'))
      .set('views', resolve('src/views'))

    // 压缩图片
    const imagesRule = config.module.rule('images')
    imagesRule.uses.clear()
    imagesRule.use('file-loader')
      .loader('url-loader')
      .options({
        limit: 10240,
        fallback: {
          loader: 'file-loader',
          options: {
            outputPath: 'static/images'
          }
        }
      })

    // 压缩响应的app.json返回的代码压缩
    config.optimization.minimize(true)
  },
  // webpack的配置
  configureWebpack: config => {
    // 忽略打包配置
    config.externals = cdn.externals
    // 生产环境配置
    if (process.env.NODE_ENV === 'production') {
      // 代码压缩去除console.log
      config.plugins.push(
        new TerserPlugin({
          terserOptions: {
            ecma: undefined,
            warnings: false,
            parse: {},
            compress: {
              drop_console: true,
              drop_debugger: false,
              pure_funcs: ['console.log'] // 移除console
            }
          }
        })
      )
    }

    // 开启gzip压缩
    config.plugins.push(
      new CompressionWebpackPlugin(
        {
          filename: info => {
            return `${info.path}.gz${info.query}`
          },
          algorithm: 'gzip',
          threshold: 10240, // 只有大小大于该值的资源会被处理 10240
          test: new RegExp('\.(' + ['js'].join('|') + ')$'
          ),
          minRatio: 0.8, // 只有压缩率小于这个值的资源才会被处理
          deleteOriginalAssets: false // 删除原文件
        }
      )
    )

    // 展示打包图形化信息
    config.plugins.push(
      new BundleAnalyzer()
    )

    // 公共代码抽离
    config.optimization = {
      splitChunks: {
        cacheGroups: {
          vendor: {
            chunks: 'all',
            test: /node_modules/,
            name: 'vendor',
            minChunks: 1,
            maxInitialRequests: 5,
            minSize: 0,
            priority: 100
          }
        }
      }
    }
  },
  css: {
    extract: true,
    sourceMap: false,
    loaderOptions: {
      // 定义全局scss无需引入即可使用
      sass: {
        prependData: `
          @import "@/assets/css/variable.scss";
          @import "@/assets/css/common.scss";
          @import "@/assets/css/mixin.scss";
        `
      }
    }
  },
  // 需要gzip压缩的文件
  devServer: {
    host: 'localhost',
    port: 8080, // 端口号
    open: false, // 配置自动启动浏览器
    before (app, server) {
      app.get(/.*.(js)$/, (req, res, next) => {
        req.url = req.url + '.gz'
        res.set('Content-Encoding', 'gzip')
        next()
      })
    }
  }

}
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  • 原文地址：https://www.cnblogs.com/1115changhao/p/14476011.html
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