Angular 2, Angular 5 - User click events/event handling for dynamic [innerHTML] generated content using pipe and directive to generate and converting plain text to click urls e.g #hashtags, @Handle, @Mention, #routerLink #href and #mailto etc

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>angular 5 + flex layout</title>
     <!-- polyfill(s) for older browsers -->
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>

    <script src="https://unpkg.com/zone.js@0.8.16?main=browser"></script>
    <!--<script src="https://unpkg.com/reflect-metadata@0.1.10"></script>-->
    <script src="https://unpkg.com/systemjs@0.20.18/dist/system.src.js"></script>
    <script src="https://unpkg.com/web-animations-js@2.3.1"></script>
  

    <script src="systemjs.config.js"></script>
    <script>
        System.import('app').catch(function (err) { console.error(err); });
    </script>
  </head>

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

</html>

//our root app component
import { Component, NgModule} from '@angular/core';
import { BrowserModule} from '@angular/platform-browser';

@Component({
  selector: 'my-app',
  template: `test`
})
export class AppComponent {
    
    protected loading = false;

    constructor(private imagePreloader: ImagePreloader) {
        this.preloadImages();
    }
    
    private preloadImages(): void {
        const images = [
            'https://angular.io/assets/images/logos/angular/logo-nav@2x.png'
        ];
        
        this.loading = true;
        
        this.imagePreloader.preload(images).subscribe(() => {
            this.loading = false;
        });
    }

}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { FlexLayoutModule } from '@angular/flex-layout';
import { HttpClientModule } from '@angular/common/http';

import { AppComponent } from './app.component';
import { ImagePreloader } from './preloader';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        FlexLayoutModule,
        HttpClientModule
    ],
    declarations: [
        AppComponent
    ],
    providers: [
        ImagePreloader
    ],
    exports: [
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }

(function (global) {
  var angVer = '5.0.0-beta.6';
 
  System.config({
    transpiler: 'ts',
    typescriptOptions: {
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "lib": [ "es2015", "dom" ],
      "module": "commonjs",
      "moduleResolution": "node",
      "noImplicitAny": true,
      "sourceMap": true,
      "suppressImplicitAnyIndexErrors": true,
      "target": "es5"
    },
    meta: {
      'typescript': {
        "exports": "ts"
      }
    },
    paths: { 
      'npm:': 'https://unpkg.com/',
      'gh:': 'https://raw.githubusercontent.com/'
    },
    map: {
      "app": "app",
      "rxjs": "npm:rxjs@5.4.3",
      "ts": "npm:plugin-typescript@7.1.0/lib/plugin.js",
      "typescript": "npm:typescript@2.4.2/lib/typescript.js",
      "@angular/core": "npm:@angular/core@" + angVer + "/bundles/core.umd.js",
      "@angular/common": "npm:@angular/common@" + angVer + "/bundles/common.umd.js",
      "@angular/compiler": "npm:@angular/compiler@" + angVer + "/bundles/compiler.umd.js",
      "@angular/platform-browser": "npm:@angular/platform-browser@" + angVer + "/bundles/platform-browser.umd.js",
      "@angular/platform-browser-dynamic": "npm:@angular/platform-browser-dynamic@" + angVer + "/bundles/platform-browser-dynamic.umd.js",
      "@angular/http": "npm:@angular/http@" + angVer + "/bundles/http.umd.js",
      "@angular/router": "npm:@angular/router@" + angVer + "/bundles/router.umd.js",
      "@angular/forms": "npm:@angular/forms@" + angVer + "/bundles/forms.umd.js",
      "@angular/animations": "npm:@angular/animations@" + angVer + "/bundles/animations.umd.js",
      "@angular/animations/browser": "npm:@angular/animations@" + angVer + "/bundles/animations-browser.umd.js",
      "@angular/platform-browser/animations": "npm:@angular/platform-browser@" + angVer + "/bundles/platform-browser-animations.umd.js",
      "@angular/flex-layout": "npm:@angular/flex-layout@2.0.0-beta.9"
},
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.ts',
        defaultExtension: 'ts'
      },
      rxjs: {
        defaultExtension: 'js'
      }
    }
  });

  if (!global.noBootstrap) { bootstrap(); }

  // Bootstrap the `AppModule`(skip the `app/main.ts` that normally does this)
  function bootstrap() {

    // Stub out `app/main.ts` so System.import('app') doesn't fail if called in the index.html
    System.set(System.normalizeSync('app/main.ts'), System.newModule({ }));

    // bootstrap and launch the app (equivalent to standard main.ts)
    Promise.all([
      System.import('@angular/platform-browser-dynamic'),
      System.import('app/app.module')
    ])
    .then(function (imports) {
      var platform = imports[0];
      var app      = imports[1];
      platform.platformBrowserDynamic().bootstrapModule(app.AppModule);
    })
    .catch(function(err){ console.error(err); });
  }
})(this);

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';

@Injectable()
export class ImagePreloader {

    constructor(private http: HttpClient) {
    }

    preload(...src: string[]): void {
        //this.src = 'http://www.downgraf.com/wp-content/uploads/2014/09/01-progress.gif'; //Just a random loading gif found on google.
        //this.http.get('http://example.com/mycdn/' + this.data.url + '.jpg')
        //    .subscribe(response => {
        //        let urlCreator = window.URL;
        //        this.src = urlCreator.createObjectURL(response.blob());
        //    });

        const src$ = src.map(c => {
            return this.http.get(c);
        });
    }

}