http:{ 

  gzip on; 
  gzip_static on;
  gzip_buffers 4 16k;
  gzip_comp_level 5;
  gzip_types text/plain application/javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg 

     image/gif image/png;
}

throw new ValidationError(ajv.errors, name);
 ^
ValidationError: Compression Plugin Invalid Options
options should NOT have additional properties
 at validateOptions (E:\workspace\webpack-stack\analyze-demo\node_modules\compression-webpack-plugin\node_modules\schema-utils\src\validateOptions.js:32:11)

building for production...E:\workspace\webpack-stack\analyze-demo\node_modules\compression-webpack-plugin\dist\index.js:175
 compiler.hooks.emit.tapAsync({ name: 'CompressionPlugin' }, emit);
 
TypeError: Cannot read property 'emit' of undefined
 at CompressionPlugin.apply (E:\workspace\webpack-stack\analyze-demo\node_modules\compression-webpack-plugin\dist\index.js:175:20)

var path = require('path')
 
 module.exports = {
 build: { // production 环境
  env: require('./prod.env'), // 使用 config/prod.env.js 中定义的编译环境
  index: path.resolve(__dirname, '../dist/index.html'), // 编译输入的 index.html 文件
  assetsRoot: path.resolve(__dirname, '../dist'), // 编译输出的静态资源路径
  assetsSubDirectory: 'static', // 编译输出的二级目录
  assetsPublicPath: '/', // 编译发布的根目录，可配置为资源服务器域名或 CDN 域名
  productionSourceMap: true, // 是否开启 cssSourceMap
  // Gzip off by default as many popular static hosts such as
  // Surge or Netlify already gzip all static assets for you.
  // Before setting to `true`, make sure to:
  // npm install --save-dev compression-webpack-plugin
  productionGzip: false, // 是否开启 gzip
  productionGzipExtensions: ['js', 'css'] // 需要使用 gzip 压缩的文件扩展名
 },
 dev: { // dev 环境
  env: require('./dev.env'), // 使用 config/dev.env.js 中定义的编译环境
  port: 8080, // 运行测试页面的端口
  assetsSubDirectory: 'static', // 编译输出的二级目录
  assetsPublicPath: '/', // 编译发布的根目录，可配置为资源服务器域名或 CDN 域名
  proxyTable: {}, // 需要 proxyTable 代理的接口（可跨域）
  // CSS Sourcemaps off by default because relative paths are "buggy"
  // with this option, according to the CSS-Loader README
  // (https://github.com/webpack/css-loader#sourcemaps)
  // In our experience, they generally work as expected,
  // just be aware of this issue when enabling this option.
  cssSourceMap: false // 是否开启 cssSourceMap
 }
 }