webpack.config.js

const HtmlWebpackPlugin = require("html-webpack-plugin");
const path = require("path");
const webpack = require("webpack");

module.exports = {
  entry: ["@babel/polyfill", "./src/index.js"],
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /(node_modules)/,
        loader: "babel-loader",
        options: {
          cacheDirectory: true,
          presets: ["@babel/preset-env"]
        }
      },
      {
        test: /\.css$/,
        use: ["style-loader", "css-loader"]
      },
      {
        test: /\.html$/,
        loader: "html-loader"
      },
      {
        test: /\.mp4$/,
        loader: "url-loader?limit=10000&mimetype=video/mp4"
      }
    ]
  },
  resolve: { extensions: ["*", ".js", ".jsx"] },
  output: {
    path: path.resolve(__dirname, "dist/"),
    publicPath: "/",
    filename: "bundle.js"
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      inject: true,
      template: path.resolve(__dirname, "public/index.html")
    })
  ]
};