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
 }
}