const rules = require("./webpack.rules"); rules.push({ test: /\.jsx?$/, exclude: /node_modules/, use: [{ loader: "babel-loader" }] }); rules.push({ test: /\.css$/, exclude: /node_modules/, use: [{ loader: "style-loader" }, { loader: "css-loader" }] }); module.exports = { // Put your normal webpack config below here module: { rules } };