webpack.config.js

const path = require("path");
const webpack = require("webpack");

module.exports = {
    entry: "./src/index.js",
    output: {
        path: path.resolve(__dirname, "./dist"),
        filename: "[name].bundle.js",
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader",
                },
            },
            {
                test: /\.css$/i,
                use: ["style-loader", "css-loader"]
            },
            {
                test: /\.(png|jpg|gif)$/,
                use: [
                    {
                        loader: "file-loader",
                        options: {
                            publicPath: '/dist',
                            useRelativePaths: true
                        }
                    }
                ]
            }
        ],
    },
    optimization: {
        minimize: true,
    },
    plugins: [
        new webpack.DefinePlugin({
            "process.env": {
                // This has effect on the react lib size
                NODE_ENV: JSON.stringify("development"),
            },
        }),
    ],
};