Angular 6 DatePicker

<!DOCTYPE html>
<html>

<head>
  <base href="." />
  <title>Angular 6 datepicker</title>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
  <script src="https://unpkg.com/gijgo@1.9.13/js/gijgo.min.js" type="text/javascript"></script>
  <link href="https://unpkg.com/gijgo@1.9.13/css/gijgo.min.css" rel="stylesheet" type="text/css" />
  <script src="https://unpkg.com/core-js@2.5.7/client/shim.min.js"></script>
  <script src="https://unpkg.com/zone.js@0.8.26?main=browser"></script>
  <script src="https://unpkg.com/reflect-metadata@0.1.8"></script>
  <script src="https://unpkg.com/systemjs@0.19.39/dist/system.src.js"></script>
  
  <script src="config.js"></script>
  <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
</head>

<body>
  <my-app>
    loading...
  </my-app>
</body>

</html>

var angularVersion = '@6.0.7';

System.config({
  transpiler: 'ts',
  typescriptOptions: {
    emitDecoratorMetadata: true,
    experimentalDecorators: true
  },
  meta: {
  'typescript': {
		"exports": "ts"
	  }
	},
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  map: {
    app: "./src",
    '@angular/core': 'npm:@angular/core'+angularVersion+'/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common'+angularVersion+'/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler'+angularVersion+'/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser'+angularVersion+'/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic'+angularVersion+'/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http'+angularVersion+'/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router'+angularVersion+'/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms'+angularVersion+'/bundles/forms.umd.js',
    '@angular/upgrade': 'npm:@angular/upgrade'+angularVersion+'/bundles/upgrade.umd.js',
    '@angular/upgrade/static': 'npm:@angular/upgrade'+angularVersion+'/bundles/upgrade-static.umd.js',

    // other libraries
    'rxjs':                      'npm:rxjs@6.2.1',
    'rxjs-compat':               'npm:rxjs-compat@6.2.1',
    'ts':                        'npm:plugin-typescript@8.0.0/lib/plugin.js',
    'typescript':                'npm:typescript@2.9.2/lib/typescript.js',
    'gijgo-angular-wrappers': 'npm:gijgo-angular-wrappers@1.9.8/index.ts',
    'gijgo': 'npm:gijgo',
    '@types/jquery': 'npm:@types/jquery',
    '@types/gijgo': 'npm:@types/gijgo'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
        main: 'index.js',
        defaultExtension: 'js'
    },
    "rxjs/operators": {
        main: 'index.js',
        defaultExtension: 'js'
    }
  }
});

//main entry point
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app';

platformBrowserDynamic().bootstrapModule(AppModule)

//our root app component
import {Component, NgModule, VERSION, ViewChild} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import { FormsModule } from '@angular/forms';
import { DatePickerComponent } from 'gijgo-angular-wrappers'
import * as types from 'gijgo'

@Component({
  selector: 'my-app',
  template: `
    <div style="padding: 10px">
      <gijgo-datepicker #datepicker [configuration]="configuration"></gijgo-datepicker><br/>
      Selected Date: {{date}} <br/><br/>
      <button class="btn btn-default" (click)="setValue()">Set New Value</button><br/><br/>
      Event Log: <p>{{eventLog}}</p>
    </div>
  `,
})
export class App {  @ViewChild("datepicker") datepicker: DatePickerComponent;

  configuration: types.DatePickerSettings;

  date = '03/08/2019';

  eventLog: string = '';

  constructor() {
    this.configuration = { 
      value: this.date,
      uiLibrary: 'bootstrap4',
      width: 200,
      open: (e) => {
        this.eventLog += 'Open is fired.';
      },
      close: (e) => {
        this.eventLog += 'Close is fired.';
      },
      change: (e) => {
        this.date = this.datepicker.instance.value().toString();
        this.eventLog += 'Change is fired. ';
      }
    };
  }

  setValue() {
    this.datepicker.instance.value('03/12/2019');
  }
}

@NgModule({
  imports: [ BrowserModule, FormsModule ],
  declarations: [ App, DatePickerComponent ],
  bootstrap: [ App ]
})
export class AppModule {}