Angular 8.2.13 Build : An unhandled exception occurred: Unexpected token: punc ())

[imtase]

An unhandled exception occurred: Unexpected token: punc ()) when try to build for production in Angular with the command

ng build --prod --aot=true --commonChunk=true --optimization=true --vendorChunk=true --base-href=./ 

How to reproduce

1 - create a new angular app
2 - install the package npm install steem --save
3 - in app.component.ts

import { Component } from '@angular/core';

import * as steem from 'steem';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'steembug';

  constructor(){
    steem.api.getAccounts(['ned', 'dan'], function(err, result) {
      console.log(err, result);
    });    
  }
}

4 - to solve the error of Global in polyfills.ts add

(window as any).global = window;

5 - to solve the error of Buffer edit 'node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js' and modify node: false by

node: {crypto: true, stream: true}

Environment:

[miikkikiikki]

Will this be fixed soon? Same problem.