3 help impl demo

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular 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/animations': 'npm:@angular/animations/bundles/animations.umd.js',
    '@angular/platform-browser/animations': 'npm:@angular/platform-browser/bundles/platform-browser-animations.umd.js',
    '@angular/animations/browser': 'npm:@angular/animations/bundles/animations-browser.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@2.2.1/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, VERSION, Input, ElementRef, Renderer2, NgZone, HostListener} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'

@Component({
  selector: 'help',
  template: `?<div class="popup" *ngIf="active"><ng-content></ng-content></div>`,
  styles: [
    `
      :host {
        display: inline-block;
        height: 16px;
        width: 16px;
        line-height: 16px;
        font-size: 12px;
        text-align: center;
        background-color: #aaa;
        color: #fff;
        border-radius: 8px;
        position: relative;
      }
      
      .popup {
        position: absolute;
        color: #000;
        top: -100%;
        background-color: #fff;
        box-shadow: 0 2px 8px rgba(0,0,0,0.4);
        padding: 2px;
      }
    `
  ],
})
export class Help {
  active = false;
  private _removeListener = () => {};
  
  constructor(private _elementRef: ElementRef, private _renderer: Renderer2) { }
  
  ngOnInit() {
    this._removeListener = this._renderer.listen('document', 'click', (event: MouseEvent) => {
      const nextActive = this._elementRef.nativeElement.contains(event.target);
      this.active = nextActive;
    });
  }
  
  ngOnDestroy() {
    this._removeListener();
  }
}

@Component({
  selector: 'help2',
  template: `?<div class="popup" *ngIf="active"><ng-content></ng-content></div>`,
  styles: [
    `
      :host {
        display: inline-block;
        height: 16px;
        width: 16px;
        line-height: 16px;
        font-size: 12px;
        text-align: center;
        background-color: blue;
        color: #fff;
        border-radius: 8px;
        position: relative;
      }
      
      .popup {
        position: absolute;
        color: #000;
        top: -100%;
        background-color: #fff;
        box-shadow: 0 2px 8px rgba(0,0,0,0.4);
        padding: 2px;
      }
    `
  ],
})
export class Help2 {
  active = false;
  private _removeListener = () => {};
  
  constructor(
    private _elementRef: ElementRef,
    private _renderer: Renderer2,
    private _zone: NgZone) { }
  
  ngOnInit() {
    this._zone.runOutsideAngular(() => {
      this._removeListener = this._renderer.listen('document', 'click', (event: MouseEvent) => {
        const nextActive = this._elementRef.nativeElement.contains(event.target);
        if (this.active !== nextActive) this._zone.run(() => this.active = nextActive);
      });
    });
  }
  
  ngOnDestroy() {
    this._removeListener();
  }
}

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Hello {{name}}</h2>
      <help>foo</help>
      <help>bar</help>
      <help>baz</help>
      <help2>hoge</help2>
      <help2>fuga</help2>
    </div>
  `,
})
export class App {
  name:string;
  constructor() {
    this.name = `Angular! v${VERSION.full}`
  }
}

@Component({
  selector: 'help3',
  template: `?<div class="popup" *ngIf="active"><ng-content></ng-content></div>`,
  styles: [
    `
      :host {
        display: inline-block;
        height: 16px;
        width: 16px;
        line-height: 16px;
        font-size: 12px;
        text-align: center;
        background-color: green;
        color: #fff;
        border-radius: 8px;
        position: relative;
      }
      
      .popup {
        position: absolute;
        color: #000;
        top: -100%;
        background-color: #fff;
        box-shadow: 0 2px 8px rgba(0,0,0,0.4);
        padding: 2px;
      }
    `
  ],
})
export class Help3 {
  active = false;
  
  constructor(private _elementRef: ElementRef) { }
  
  @HostListener('document:click', ['$event'])
  onClick(event: MouseEvent) {
    const nextActive = this._elementRef.nativeElement.contains(event.target);
    this.active = nextActive;
  }
}

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Hello {{name}}</h2>
      <help>foo</help>
      <help>bar</help>
      <help>baz</help>
      <help2>hoge</help2>
      <help2>fuga</help2>
      <help3>（＾ω＾ ≡ ＾ω＾）</help3>
      <help3>ｷﾀ━━━━(ﾟ∀ﾟ)━━━━!!</help3>
    </div>
  `,
})
export class App {
  name:string;
  constructor() {
    this.name = `Angular! v${VERSION.full}`
  }
}

@NgModule({
  imports: [ BrowserModule ],
  declarations: [ App, Help, Help2, Help3 ],
  bootstrap: [ App ]
})
export class AppModule {}