Example usage of the datepicker widget from https://ng-bootstrap.github.io

<!DOCTYPE html>
<html>

  <head>
  <base href="." />
    <title>ng-bootstrap demo</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" />
    <script src="https://unpkg.com/core-js@^2.5.4/client/shim.js"></script>
    <script src="https://unpkg.com/zone.js@^0.8.26/dist/zone.js"></script>
    <script src="https://unpkg.com/zone.js@^0.8.26/dist/long-stack-trace-zone.js"></script>
    <script src="https://unpkg.com/reflect-metadata@^0.1.2/Reflect.js"></script>
    <script src="https://unpkg.com/systemjs@^0.19.40/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>

var ver = {
    ng: '6.1.0'
  };

  System.config({
  //use typescript for compilation
  transpiler: 'typescript',
  //typescript compiler options
  typescriptOptions: {
    emitDecoratorMetadata: true
  },
  meta: {
    'typescript': {
      "exports": "ts"
    }
  },
  paths: {
    'npm:': 'https://unpkg.com/'
  },
  map: {

    'app': './src',

    '@angular/core': 'npm:@angular/core@' + ver.ng + '/bundles/core.umd.js',
    '@angular/common': 'npm:@angular/common@' + ver.ng + '/bundles/common.umd.js',
    '@angular/common/http': 'npm:@angular/common@' + ver.ng + '/bundles/common-http.umd.js',
    '@angular/compiler': 'npm:@angular/compiler@' + ver.ng + '/bundles/compiler.umd.js',
    '@angular/platform-browser': 'npm:@angular/platform-browser@' + ver.ng + '/bundles/platform-browser.umd.js',
    '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@' + ver.ng + '/bundles/platform-browser-dynamic.umd.js',
    '@angular/http': 'npm:@angular/http@' + ver.ng + '/bundles/http.umd.js',
    '@angular/router': 'npm:@angular/router@' + ver.ng + '/bundles/router.umd.js',
    '@angular/forms': 'npm:@angular/forms@' + ver.ng + '/bundles/forms.umd.js',

    'rxjs': 'npm:rxjs@6.0.0',
    'tslib': 'npm:tslib/tslib.js',
    'typescript': 'npm:typescript@~2.7.2/lib/typescript.js',

    '@ng-bootstrap/ng-bootstrap': 'npm:@ng-bootstrap/ng-bootstrap@3.0.0/bundles/ng-bootstrap.umd.js'
  },
  packages: {
    app: {
      main: './main.ts',
      defaultExtension: 'ts'
    },
    rxjs: {
      main: 'index.js',
      defaultExtension: 'js'
    },
    'rxjs/operators': {
      main: 'index.js',
      defaultExtension: 'js'
    }
  }
});

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 { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { NgbModule, NgbDateAdapter, NgbDateNativeAdapter } from '@ng-bootstrap/ng-bootstrap';
import { NgbdDatepickerBasic } from './datepicker-basic';

@Component({
  selector: 'my-app',
  template: `
    <div class="container-fluid">

    <hr>
    <p>
      This is a demo plnkr forked from the <strong>ng-bootstrap</strong> project: Angular powered Bootstrap.
      Showing that providing global NgBDateAdpater is not working properly, as the model should be a string
    </p>
    <hr>

    <ngbd-datepicker-basic></ngbd-datepicker-basic>
  </div>
  `
})
export class App {
}

@NgModule({
  imports: [BrowserModule, FormsModule, ReactiveFormsModule, HttpClientModule, NgbModule.forRoot()],
  declarations: [App, NgbdDatepickerBasic],
  providers:[
    { provide: NgbDateAdapter, useClass: NgbDateNativeAdapter }]
  bootstrap: [App]
})
export class AppModule {}

import {Component} from '@angular/core';
import {NgbDateStruct, NgbCalendar} from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'ngbd-datepicker-basic',
  templateUrl: 'src/datepicker-basic.html'
})
export class NgbdDatepickerBasic {

  model: NgbDateStruct;
  date: {year: number, month: number};

  constructor(private calendar: NgbCalendar) {
  }

  selectToday() {
    this.model = this.calendar.getToday();
  }
}

<p>Simple datepicker</p>

<ngb-datepicker #dp [(ngModel)]="model" (navigate)="date = $event.next"></ngb-datepicker>

<hr/>

<button class="btn btn-sm btn-outline-primary mr-2" (click)="selectToday()">Select Today</button>
<button class="btn btn-sm btn-outline-primary mr-2" (click)="dp.navigateTo()">To current month</button>
<button class="btn btn-sm btn-outline-primary mr-2" (click)="dp.navigateTo({year: 2013, month: 2})">To Feb 2013</button>

<hr/>

<pre>Month: {{ date.month }}.{{ date.year }}</pre>
<pre>Model: {{ model | json }}</pre>