ng-bootstrap typeahead

<!DOCTYPE html>
<html>

  <head>
    <base href="." />
    <title>ng2-formly example</title>
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="https://unpkg.com/bootstrap@4.0.0-alpha.5/dist/css/bootstrap.min.css">

    <script src="https://unpkg.com/zone.js@0.6.26/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js@0.6.26/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.8/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@0.19.39/dist/system.js"></script>
    <script src="config.js"></script>
    <script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
    
    <script>
    System.import('app')
      .catch(console.error.bind(console));
  </script>
  </head>

  <body>
    <formly-example-app>
      loading...
    </formly-example-app>
  </body>

</html>

/* Styles go here */

### ng2-formly example - 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@2.1.1/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common@2.1.1/bundles/common.umd.js',
    '@angular/compiler': 'npm:@angular/compiler@2.1.1/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser@2.1.1/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@2.1.1/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http@2.1.1/bundles/http.umd.js',
    '@angular/router': 'npm:@angula/router@3.1.1/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms@2.1.1/bundles/forms.umd.js',
    
    '@angular/core/testing': 'npm:@angular/core@2.1.1/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common@2.1.1/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler@2.1.1/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser@2.1.1/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic@2.1.1/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http@2.1.1/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router@3.1.1/bundles/router-testing.umd.js',
    
    '@ng-bootstrap/ng-bootstrap': 'npm:@ng-bootstrap/ng-bootstrap@1.0.0-alpha.13/bundles/ng-bootstrap.js',
    
    'ng2-formly': 'npm:ng2-formly@2.0.0-beta.13/bundles/ng2-formly.umd.min.js',
    'rxjs': 'npm:rxjs@5.0.0-beta.12',
    'typescript': 'npm:typescript@2.0.3/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 {NgModule, Component, ViewChild, ViewContainerRef, Injectable} from '@angular/core';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
import {FormsModule} from '@angular/forms';
import {JsonpModule, Jsonp, URLSearchParams} from '@angular/http';
import {BrowserModule} from '@angular/platform-browser';
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/observable/of';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/debounceTime';
import 'rxjs/add/operator/distinctUntilChanged';
import 'rxjs/add/operator/do';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/switchMap';
import 'rxjs/add/operator/merge';

declare var google: any;

@Injectable()
export class WikipediaService {
  autocompleteService: any;

  constructor(private _jsonp: Jsonp) {
    this.autocompleteService = new google.maps.places.AutocompleteService;
  }

  search(term: string) {
    if (term === '') {
      return Observable.of([]);
    }

    let result = Observable.create(observer => {
        this.autocompleteService.getPlacePredictions({ input: term }, (results, status) => {
          if (status == google.maps.places.PlacesServiceStatus.OK) {
            observer.next(results.map(result => result.description));
            observer.complete();
          } else {
            console.log('Error - ', results, ' & Status - ', status);
            observer.next({});
            observer.complete();
          }
        });
    });
    return result;
  }
}

@Component({
  selector: 'formly-example-app',
  templateUrl: 'template.html',
})
export class FormlyExampleApp {

}

@Component({
  selector: 'formly-typeahead',
  template: `
    <form>
  <div class="form-group">
    <input class="form-control" id="origin" type="text" [(ngModel)]="model" [ngbTypeahead]="search" placeholder="Origin"
      name="origin" required/>
  </div>
</form>
  `,
   providers: [WikipediaService]
})
export class FormlyTypeAhead {
  model: any;

  constructor(private _service: WikipediaService) {}

  search = (text$: Observable<string>) =>
    text$
      .debounceTime(300)
      .distinctUntilChanged()
      .switchMap(term =>
        this._service.search(term)
          .catch(() => {
            return Observable.of([]);
          }))
}


@NgModule({
  declarations: [
    FormlyExampleApp, FormlyTypeAhead
  ],
  imports: [
    BrowserModule,
    FormsModule,
    JsonpModule,
    NgbModule.forRoot()
  ],
  bootstrap: [FormlyExampleApp]
})
export class AppModule {
}

<div class="container">
    <formly-typeahead></formly-typeahead>
</div>