minimal-webpack-config

const path = require('path');
const TerserPLugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin')
module.exports = {
    entry: './src/index.js',
    output: {
        filename: 'bundle.[contenthash].js',
        path: path.resolve(__dirname, './dist'),
        publicPath: ''

    },
    mode: "none",
    module: {
        rules: [
            {
                test: /\.(xml)$/,
                use: ['xml-loader']
            },
            {
                test: /\.(.png|jpg|jfif)$/,
                use: [
                    'file-loader'
                ]
            },
            {
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader'
                ]
            },
            {
                test: /\.scss$/,
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'
                ]
            },
            {
                test: /\.js$/,
                exclude: '/node_modules/',
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/env'],
                        plugins: ['transform-class-properties']
                    }
                }
            },

        ],

    },
    plugins: [
        new CleanWebpackPlugin(),
        new HtmlWebpackPlugin(),
        new TerserPLugin(),
        new MiniCssExtractPlugin({
            filename: 'style.[contenthash].css'
        }),

    ]

}

set it to public

{
  "name": "wpacktuts",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "css-loader": "^5.0.1",
    "file-loader": "^6.2.0",
    "node-sass": "^5.0.0",
    "sass-loader": "^10.1.1",
    "style-loader": "^2.0.0",
    "webpack": "^5.18.0"
  },
  "devDependencies": {
    "@babel/core": "^7.12.10",
    "@babel/preset-env": "^7.12.11",
    "babel-loader": "^8.2.2",
    "babel-plugin-transform-class-properties": "^6.24.1",
    "clean-webpack-plugin": "^2.0.2",
    "html-webpack-plugin": "^4.2.0",
    "mini-css-extract-plugin": "^1.3.9",
    "terser-webpack-plugin": "^5.1.1",
    "webpack-cli": "^4.5.0"
  }
}