new *ngIf, *ngFor features

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular2 playground</title>
    <link rel="stylesheet" href="style.css" />
    <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>

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

</html>

/* Styles go here */

### Angular Starter Plunker - Typescript

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/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    
    'rxjs': 'npm:rxjs',
    'typescript': 'npm:typescript@2.0.2/lib/typescript.js'
  },
  //packages defines our app package
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      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} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import {HttpModule } from '@angular/http';

import { MyComponent } from './mycomponent';
import { ElseComponent } from './else-component';
import { NewComponent } from './new-component';
import { UserListComponent } from './userlist.component';

@Component({
  selector: 'my-app',
  template: `
    <div>
      <my-cmp></my-cmp>
      <hr />
      <else-cmp></else-cmp>      
      <hr/>
      <new-cmp></new-cmp>
      <hr />
      <user-list></user-list>
    </div>
  `,
})
export class App {
  
  constructor() {}
  
}

@NgModule({
  imports: [ BrowserModule, HttpModule ],
  declarations: [ App, MyComponent, NewComponent, ElseComponent, UserListComponent ],
  bootstrap: [ App ]
})
export class AppModule {}

{
  "username": "Juri"
}

//our root app component
import {Component, NgModule} from '@angular/core'
import {HttpModule, Http} from '@angular/http';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/delay';

@Component({
  selector: 'my-cmp',
  template: `
    <div>
      Username:
      <div *ngIf="(user$|async)">
        Hi, {{ (user$|async)?.username }}
      </div>
    </div>
  `,
})
export class MyComponent {
  user$;
  
  constructor(private http: Http) { }
  
  ngOnInit() {
    this.user$ = 
      this.http
        .get('./person.json')
        .delay(1000)
        .map(res => res.json());
  }
  
}

//our root app component
import {Component, NgModule} from '@angular/core'
import {HttpModule, Http} from '@angular/http';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/delay';

@Component({
  selector: 'new-cmp',
  template: `
    <div>
      Username:
      <div *ngIf="user$ | async as user">
        Hi, {{ user.username }}
      </div>
    </div>
  `,
})
export class NewComponent {
  user$;
  
  constructor(private http: Http) { }
  
  ngOnInit() {
    this.user$ = 
      this.http
        .get('./person.json')
        .delay(1000)
        .map(res => res.json());
  }
  
}

//our root app component
import {Component, NgModule} from '@angular/core'
import {HttpModule, Http} from '@angular/http';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/delay';

@Component({
  selector: 'else-cmp',
  template: `
    <div>
      Username:
      <div *ngIf="user$ | async as user; else elseTmpl">
        Hi, {{ user.username }}
      </div>
      <ng-template #elseTmpl>
        Loading user...
      </ng-template>
    </div>
  `,
})
export class ElseComponent {
  user$;
  
  constructor(private http: Http) { }
  
  ngOnInit() {
    this.user$ = 
      this.http
        .get('./person.json')
        .delay(1000)
        .map(res => res.json());
  }
  
}

import { Component } from '@angular/core';
import { Http } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';

@Component({
  selector: 'user-list',
  template: `
    Users:
    <ul>
        <li *ngFor="let user of users$ | async as users; index as i">
            {{ user.username }} ({{i}} of {{users.length}})
        </li>
    </ul>
  `
})
export class UserListComponent {
  users$;

  constructor(private http: Http) {  }

  ngOnInit() {
    this.users$ = this.http
        .get('./people.json')
        .map(res => res.json());
  }
}

[
  {
    "username": "@juristr"
  },
  {
    "username": "@brocco"
  },
  {
    "username": "@schwarty"
  }  
]