.eslintrc.json

{
  "env": {
    "browser": true,
    "es6": true
  },
  "extends": "eslint:recommended",
  "globals": {
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "plugins": ["react"],
  "rules": {}
}

App.jsx

import React from "react";

import "./App.scss";

const App = () => {
  return (
    <div className="App" />
  );
};

export default App;

webpack.config.js

const path = require("path");
const HtmlWebPackPlugin = require("html-webpack-plugin");
module.exports = {
  output: {
    path: path.resolve(__dirname, "dist"),
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: {
          loader: "babel-loader",
        },
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: "html-loader",
          },
        ],
      },
      {
        test: /\.s[ac]ss$/i,
        use: ["style-loader", "css-loader", "sass-loader"],
      },
      {
        test: /\.css$/i,
        use: ["style-loader", "css-loader"],
      },
    ],
  },
  resolve: {
    extensions: ["*", ".js", ".jsx"],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "./src/index.html",
      filename: "./index.html",
    }),
  ],
};