Angular2 RC.4 & RxJS BehaviorSubject example

<!DOCTYPE html>
<html>

  <head>
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <script src="https://npmcdn.com/zone.js@0.6.12"></script>
    <script src="https://npmcdn.com/reflect-metadata@0.1.3"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.27/system.js"></script>
    <script src="https://npmcdn.com/typescript@1.8.10/lib/typescript.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>

/* Styles go here */

/**
 * PLUNKER VERSION (based on systemjs.config.js in angular.io)
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 * Override at the last minute with global.filterSystemConfig (as plunkers do)
 */
(function(global) {

  var ngVer = '@2.0.0-rc.4'; // lock in the angular package version; do not let it float to current!

  //map tells the System loader where to look for things
  var  map = {
    'app':                        'src', // 'dist',
    'rxjs':                       'https://npmcdn.com/rxjs@5.0.0-beta.6',
    'angular2-in-memory-web-api': 'https://npmcdn.com/angular2-in-memory-web-api' // get latest
  };

  //packages tells the System loader how to load when no filename and/or no extension
  var packages = {
    'app':                        { main: 'app.ts',  defaultExtension: 'ts' },
    'rxjs':                       { defaultExtension: 'js' },
    'angular2-in-memory-web-api': { defaultExtension: 'js' },
  };

  var packageNames = [
      '@angular/common',
      '@angular/compiler',
      '@angular/core',
      '@angular/http',
      '@angular/platform-browser',
      '@angular/platform-browser-dynamic',
      '@angular/testing',
      '@angular/upgrade'
  ];

  // add map entries for angular packages in the form '@angular/common': 'https://npmcdn.com/@angular/common@0.0.0-3'
  packageNames.forEach(function(pkgName) {
    map[pkgName] = 'https://npmcdn.com/' + pkgName + ngVer;
  });

  // add package entries for angular packages in the form '@angular/common': { main: 'index.js', defaultExtension: 'js' }
  packageNames.forEach(function(pkgName) {
    packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
  });

  var config = {
    transpiler: 'typescript',
    typescriptOptions: {
      emitDecoratorMetadata: true
    },
    map: map,
    packages: packages
  }

  // filterSystemConfig - index.html's chance to modify config before we register it.
  if (global.filterSystemConfig) { global.filterSystemConfig(config); }

  System.config(config);

})(this);


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

//our root app component
import {Component, provide} from '@angular/core';
import {bootstrap} from '@angular/platform-browser-dynamic';
import {Http, HTTP_PROVIDERS} from '@angular/http';
import {APP_BASE_HREF, LocationStrategy, HashLocationStrategy} from "@angular/common";
import {BehaviorSubject} from 'rxjs/BehaviorSubject';

@Component({
  selector: 'my-app',
  template: ''
})
export class App {
  
  constructor(){
    this._showExample();
  }
  
  private _showExample(){

    let behaviorSubject = new BehaviorSubject<number>(11);
    
    behaviorSubject.subscribe(
      (val: number) => {console.log('observer I: ' + val)},
      () => {},
      () => {}
    ); // observer I: 11
    behaviorSubject.subscribe({
      next: (val: number) => console.log('observer II: ' + val)
    }); 
    // log: observer II: 11
    
    behaviorSubject.next(22); 
    // log: observer I: 11
    // log: observer II: 11
    
    behaviorSubject.next(33); 
    // log: observer I: 33
    // log: observer II: 33
                      
    behaviorSubject.subscribe({
      next: (val: number) => console.log('observer III: ' + val)
    }); 
    // log: observer II: 33

  }
}


bootstrap(App, [
  HTTP_PROVIDERS,
  provide(APP_BASE_HREF, { useValue: "/base/app" }),
  provide(LocationStrategy, { useClass: HashLocationStrategy })
  ]).catch(err => console.error(err));