Angular 2 Dynamically add remove component(s)

<!DOCTYPE html>
<html>

<head>
  <base href="." />
  <script type="text/javascript" charset="utf-8">
    window.AngularVersionForThisPlunker = '4.3.6' // Latest version 27/08/2017
  </script>
  <title>angular playground</title>
  <link rel="stylesheet" href="style.css" />
  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
  <script src="https://unpkg.com/zone.js/dist/zone.js"></script>
  <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js"></script>
  <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
  <script src="https://unpkg.com/systemjs@0.19.31/dist/system.js"></script>
  <script src="config.js"></script>
  <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
</head>
<br>

<body class='container'>
  <h3>By <a href='http://www.advancesharp.com/blog/1214/angular-2-dynamically-add-remove-components'>Advancesharp.com</a> </h3>
  <my-app>
    loading...
  </my-app>
</body>

</html>


.row{
    margin-bottom: 10px;
}

var angularVersion;
if(window.AngularVersionForThisPlunker === 'latest'){
  angularVersion = ''; //picks up latest
}
else {
  angularVersion = '@' + window.AngularVersionForThisPlunker;
}

System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  //map tells the System loader where to look for things
  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/animations': 'npm:@angular/animations' + angularVersion + '/bundles/animations.umd.js',
    '@angular/platform-browser/animations': 'npm:@angular/platform-browser' + angularVersion + '/bundles/platform-browser-animations.umd.js',
    '@angular/animations/browser': 'npm:@angular/animations' + angularVersion + '/bundles/animations-browser.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core' + angularVersion + '/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common' + angularVersion + '/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler' + angularVersion + '/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser' + angularVersion + '/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic' + angularVersion + '/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http' + angularVersion + '/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router' + angularVersion + '/bundles/router-testing.umd.js',
    'tslib': 'npm:tslib@1.6.1',
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.2.1/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      defaultExtension: 'js'
    }
  }
});

import {NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {Router} from '@angular/router'
import { FormsModule, ReactiveFormsModule } from '@angular/forms';

import { AppComponent } from './app/app.component';
import { ExpComponent } from './app/exp.component';

    
@NgModule({
  imports: [
    BrowserModule,FormsModule, ReactiveFormsModule
  ],
  declarations: [ AppComponent, ExpComponent ],
  entryComponents: [ExpComponent],
  exports: [],
  bootstrap: [ AppComponent ]
})
export class AppModule {}

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

platformBrowserDynamic().bootstrapModule(AppModule)

<form novalidate>
    <div class="row">
        <div class="horizontal-group">
            <div class="col-sm-4">
                <input type="text" name="language"
                       [(ngModel)]= "lang"
                       placeholder="Language"
                       class="form-control">
            </div>

            <div class="col-sm-2">
                <input type="text" name='exp'
                       placeholder="Years"
                       [(ngModel)]= "exp"
                       class="form-control" >
            </div>

            <div class="col-sm-6">
                <button type="submit" class="btn btn-primary"
                      (click)="save()" > Save</button>
                <button type="button" class="btn btn-default"
                      (click)="removeObject()" > Remove</button>
            </div>
        </div>
    </div>
</form>

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

@Component({
  selector: 'app-exp',
  templateUrl: './src/app/exp.component.html'
})
export class ExpComponent {
  _ref:any;
  lang: string;
  exp: number;
  constructor() { }

  removeObject(){
    this._ref.destroy();
  }
  
  save(){
    if(this.lang && this.exp)
      alert(`Language: ${this.lang} & Experience: ${this.exp}`);
    else
      alert('Please enter value to save');
  }
}

import {Component} from '@angular/core'
import { Component, 
         OnInit, 
         ViewChild, 
         ComponentFactoryResolver,
         ViewContainerRef } from '@angular/core';
import { ExpComponent } from './exp.component'

@Component({
  selector: 'my-app',
  template: ` <h4>Add/Remove experience</h4>
             <div #parent></div>
             <div>
               <button type="button" 
                      (click)="addComponent()"
                      class="btn btn-default">Add Experience </button>
             </div>`
})
export class AppComponent implements OnInit{ 
  
  @ViewChild('parent', { read: ViewContainerRef }) container: ViewContainerRef;
  
   constructor(private _cfr: ComponentFactoryResolver) { }
   ngOnInit(){
     
     this.addComponent();
   }
   
  addComponent(){
    
      var comp = this._cfr.resolveComponentFactory(ExpComponent);
      var expComponent = this.container.createComponent(comp);
      expComponent.instance._ref = expComponent;
  }
}