Dynamic Component Loading and Injection

<!DOCTYPE html>
<html>

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

import {Component, NgModule} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'
import HelloWorldComponent from './hello-world-component';
import WorldHelloComponent from './world-hello-component';
import DynamicComponent from './dynamic-component';


interface IPayload {
  name: string;
  email: string;
  payload: {
    id: number,
    uuid: string
  };
}

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Lets dynamically create some components!</h2>
      <button (click)="createHelloWorldComponent()">Create Hello World</button>
      <button (click)="createWorldHelloComponent()">Create World Hello</button>
      <dynamic-component [componentData]="componentData"></dynamic-component>
    </div>
  `,
})
export class App {
  componentData = null;

  createHelloWorldComponent(){
    
    let payload: IPayload {
      name: 'NAME1',
        email: 'l@l.l',
        payload: {
          id: 1,
          uuid: '123456',
          sub: {
            message: 'other message'
          }
        }
    }
    
    this.componentData = {
      component: HelloWorldComponent,
      inputs: payload
    };
  }
  
  createWorldHelloComponent(){
    
    let payload: IPayload {
      name: 'NAME2',
        email: 'm@m.m',
        payload: {
          id: 2,
          uuid: '654321',
          sub: {
            message: 'message'
          }
        }
    }
    
    this.componentData = {
      component: WorldHelloComponent,
      inputs: payload
    };
  }
}

@NgModule({
  imports: [ BrowserModule ],
  declarations: [ App, HelloWorldComponent, WorldHelloComponent, DynamicComponent],
  bootstrap: [ App ]
})
export class AppModule {}

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

@Component({
  selector: 'hello-world',
  template: `
    <div>{{ payload.id }}<br>HW<br>{{name}}</div>
    <p>{{ payload.sub.message }}</p>
  `,
})
export default class HelloWorldComponent {
  name ='';
  id:'';
  email = '';
  
  payload = {};

  constructor(private injector: Injector) {
    this.name = this.injector.get('name');
    this.payload = this.injector.get('payload');
        
    console.log('payload: ' + this.payload);
    console.log(this.payload);
  }
}

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

@Component({
  selector: 'world-hello',
  template: `
    <div>{{ payload.id }}<br>WH<br>{{name}}</div>
    <p>{{ payload.sub.message }}</p>
  `,
})
export default class WorldHelloComponent {
  name ='';
  email = '';
  
  payload = {};

  constructor(private injector: Injector) {
    this.name = this.injector.get('name');
    this.payload = this.injector.get('payload');
    
    console.log('payload: ' + this.payload);
    console.log(this.payload);
  }
}

import {Component, Input, ViewContainerRef, ViewChild, ReflectiveInjector, ComponentFactoryResolver} from '@angular/core';  
import HelloWorldComponent from './hello-world-component';  
import WorldHelloComponent from './world-hello-component';

@Component({
  selector: 'dynamic-component',
  entryComponents: [HelloWorldComponent, WorldHelloComponent], // Reference to the components must be here in order to dynamically create them
  template: `
    <div #dynamicComponentContainer></div>
  `,
})
export default class DynamicComponent {  
  currentComponent = null;
  
  @ViewChild('dynamicComponentContainer', { read: ViewContainerRef }) dynamicComponentContainer: ViewContainerRef;
  
  // component: Class for the component you want to create
  // inputs: An object with key/value pairs mapped to input name/input value
  @Input() set componentData(data: {component: any, inputs: any }) {
    if (!data) {
      return;
    }
    // Inputs need to be in the following format to be resolved properly
    let inputProviders = Object.keys(data.inputs).map((inputName) => {
      return {
        provide: inputName, 
        useValue: data.inputs[inputName]
      };
    });
    
    console.log(inputProviders);
    
    let resolvedInputs = ReflectiveInjector.resolve(inputProviders);

    // We create an injector out of the data we want to pass down and this components injector
    let injector = ReflectiveInjector.fromResolvedProviders(resolvedInputs, this.dynamicComponentContainer.parentInjector);
          
    // We create a factory out of the component we want to create
    let factory = this.resolver.resolveComponentFactory(data.component);
    
    // We create the component using the factory and the injector
    let component = factory.create(injector);
    //console.log("injector",inputProviders, resolvedInputs, factory, component);
    // We insert the component into the dom container
    let tempViewRef = this.dynamicComponentContainer.insert(component.hostView);
    let tempViewRefIndex = this.dynamicComponentContainer.indexOf(tempViewRef);
   // console.log(this.dynamicComponentContainer.get(tempViewRefIndex));
    
    console.log('**showNum Provider',this.dynamicComponentContainer);
    
    // Destroy the previously created component
    if(this.currentComponent){
      //this.currentComponent.destroy();
    }
    
    this.currentComponent = component;
  }

  constructor(private resolver: ComponentFactoryResolver) {

  }

}