I solved it this way:

import TerserPlugin from "terser-webpack-plugin";
optimization: {
minimizer: [
  (compiler: Compiler): void => {
    new TerserPlugin({
      terserOptions: {
        format: {
          comments: false
        }
      },
      extractComments: false
    }).apply(compiler);
  }
]

}

See: https://github.com/MarkZhuVUW/ts-react-s3-circleci-employer-tracker/blob/feature/service-worker-notification/webpack.prod.config.ts

I solved it this way:

import TerserPlugin from "terser-webpack-plugin";
optimization: {
minimizer: [
  (compiler: Compiler): void => {
    new TerserPlugin({
      terserOptions: {
        format: {
          comments: false
        }
      },
      extractComments: false
    }).apply(compiler);
  }
]}

See: https://github.com/MarkZhuVUW/ts-react-s3-circleci-employer-tracker/blob/feature/service-worker-notification/webpack.prod.config.ts