webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack')
const InjectPlugin = require('webpack-inject-plugin').default;
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
module.exports = {
  mode: 'development',
  entry: './src/index.js',
  module: {
    rules: [
      { test: /\.txt$/, use: 'raw-loader' },
      { test: /\.css$/, use: ['style-loader', 'css-loader'] },
      { test: /\.s[ac]ss$/i, use: ['style-loader', 'css-loader', 'sass-loader'] },
      {
        test: /\.(png|jpe?g|gif)$/i,
        loader: 'file-loader',
        options: {
          outputPath: 'images',
        },
      },
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      }
    ]
  },
  devtool: 'inline-source-map',
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({ template: './src/index.html' }),
    new InjectPlugin(function () {
      return "console.log('injection working');"
    })
  ],
  output: {
    filename: 'main.js',
    path: path.resolve(__dirname, 'dist'),
  },
  devServer: {
    contentBase: './dist',
    // hot: true,
  }
};