measure2-webpack.prod.config.js

measure2-webpack.prod.config.js

module.exports = merge(baseWebpackConfig, {
  // ...
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: config.build.productionSourceMap,
      minimize: true,
      compress: {
        warnings: false, // warn about potentially dangerous optimizations/code
        sequences: true,  // join consecutive statemets with the “comma operator”
        properties: true,  // optimize property access: a["foo"] → a.foo
        dead_code: true,  // discard unreachable code
        drop_debugger: true,  // discard “debugger” statements
        unsafe: true, // some unsafe optimizations (see below)
        conditionals: true,  // optimize if-s and conditional expressions
        comparisons: true,  // optimize comparisons
        evaluate: true,  // evaluate constant expressions
        booleans: true,  // optimize boolean expressions
        loops: true,  // optimize loops
        unused: true,  // drop unused variables/functions
        hoist_funs: true,  // hoist function declarations
        hoist_vars: true, // hoist variable declarations
        if_return: true,  // optimize if-s followed by return/continue
        join_vars: true,  // join var declarations
        cascade: true,  // try to cascade `right` into `left` in sequences
        side_effects: true,  // drop side-effect-free statements
      }
    }),
    // ...
    new HtmlWebpackPlugin({
      filename: path.resolve(__dirname, '../dist/index.html'),
      template: 'src/index.html',
      inject: true,
      minify: {
        html5: true,
        useShortDoctype: true,
        decodeEntities: true,
        removeTagWhitespace: true,
        removeStyleLinkTypeAttributes: true,
        removeScriptTypeAttributes: true,
        minifyCSS: true,
        minifyJS: true,
        removeComments: true,
        collapseWhitespace: true,
        collapseBooleanAttributes: true,
        removeAttributeQuotes: false,
        removeRedundantAttributes: true,
        removeEmptyAttributes: true,
        preserveLineBreaks: false,
        sortAttributes: true,
        sortClassName: true,
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
    }),
    
    // ...
  }
);