webpack.prod.js

const webpack = require("webpack");
const path = require("path");
const fs = require("fs");
const lessToJs = require("less-vars-to-js");

const themeVariables = lessToJs(
  fs.readFileSync(path.join(__dirname, "./src/styles/ant-default-vars.less"), "utf8")
);

module.exports = {
  entry: ["./src/index.js"],
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ["babel-loader"]
      },
      {
        test: /\.less$/,
        use: [
          {
            loader: "style-loader"
          },
          {
            loader: "css-loader"
          },
          {
            loader: "less-loader",
            options: {
              modifyVars: themeVariables,
              javascriptEnabled: true
            }
          }
        ]
      },
      {
        test: /\.(png|jpg|gif|svg|eot|ttf|woff|woff2)$/,
        loader: "url-loader",
        options: {
          limit: 10000
        }
      }
    ]
  },
  resolve: {
    extensions: ["*", ".js", ".jsx"]
  },
  output: {
    path: __dirname + "/dist",
    publicPath: "/",
    filename: "bundle.js"
  },
  plugins: [
    new webpack.DefinePlugin({
      "process.env.NODE_ENV": JSON.stringify("production")
    })
  ]
};