ngx-bootstrap datepicker不起作用

我正在学习angular2和bootstrap4 . 我的公司使用以下网站 . http://valor-software.com/ngx-bootstrap/#/datepicker日历显示但如果我点击某些内容，则没有任何反应 . 我不知道为什么网站无法移动 . 你能帮助我吗？

• app.component.html：

<style>
  .full button span {
    background-color: limegreen;
    border-radius: 32px;
    color: black;
  }
  .partially button span {
    background-color: orange;
    border-radius: 32px;
    color: black;
  }
</style>

<div>
  <div class="card">
    <pre class="card-block card-header">Selected date is: <em *ngIf="dt">{{ getDate() | date:'fullDate'}}</em></pre>
  </div>
  <h4>Inline</h4>
  <div style="display:inline-block; min-height:290px;">
    <datepicker [(ngModel)]="dt" [minDate]="minDate" [showWeeks]="true" [dateDisabled]="dateDisabled"></datepicker>
  </div>

  <hr />
  <button type="button" class="btn btn-sm btn-info" (click)="today()">Today</button>
  <button type="button" class="btn btn-sm btn-default btn-secondary" (click)="d20090824();">2009-08-24</button>
  <button type="button" class="btn btn-sm btn-danger" (click)="clear()">Clear</button>
  <button type="button" class="btn btn-sm btn-default btn-secondary" (click)="toggleMin()" tooltip="After today restriction">Min date</button>
  <button type="button" class="btn btn-sm btn-default btn-secondary" (click)="disableTomorrow()">Disable Tomorrow</button>
</div>

• app.module.ts：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { DatepickerModule } from 'ngx-bootstrap/datepicker';

import { BsDropdownModule } from 'ngx-bootstrap/dropdown';
import { ModalModule } from 'ngx-bootstrap/modal';
import { PaginationModule } from 'ngx-bootstrap/pagination';
import { TypeaheadModule } from 'ngx-bootstrap/typeahead';
import { ButtonsModule } from 'ngx-bootstrap/buttons';
import { FormsModule } from '@angular/forms';


@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    DatepickerModule.forRoot(), ButtonsModule.forRoot(), TypeaheadModule.forRoot(), PaginationModule.forRoot(), ModalModule.forRoot(), BsDropdownModule.forRoot(), BrowserModule, FormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

• app.component.ts：

import { Component } from '@angular/core';
import * as moment from 'moment';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'app';
}
export class DemoDropdownBasicLinkComponent {
  public items: string[] = ['The first choice!',
    'And another choice for you.', 'but wait! A third!'];

  public onHidden(): void {
    console.log('Dropdown is hidden');
  }
  public onShown(): void {
    console.log('Dropdown is shown');
  }
  public isOpenChange(): void {
    console.log('Dropdown state is changed');
  }
}
export class DemoButtonsRadioComponent {
  public radioModel: string = 'Middle';
}
export class DemoButtonsBasicComponent {
  public singleModel: string = '1';
}
export class DemoButtonsDisabledComponent {
  public disabled: boolean = true;

}
export class DatepickerDemoComponent {
  public dt: Date = new Date();
  public minDate: Date = void 0;
  public events: any[];
  public tomorrow: Date;
  public afterTomorrow: Date;
  public dateDisabled: {date: Date, mode: string}[];
  public formats: string[] = ['DD-MM-YYYY', 'YYYY/MM/DD', 'DD.MM.YYYY',
    'shortDate'];
  public format: string = this.formats[0];
  public dateOptions: any = {
    formatYear: 'YY',
    startingDay: 1
  };
  private opened: boolean = false;

  public constructor() {
    (this.tomorrow = new Date()).setDate(this.tomorrow.getDate() + 1);
    (this.afterTomorrow = new Date()).setDate(this.tomorrow.getDate() + 2);
    (this.minDate = new Date()).setDate(this.minDate.getDate() - 1000);
    (this.dateDisabled = []);
    this.events = [
      {date: this.tomorrow, status: 'full'},
      {date: this.afterTomorrow, status: 'partially'}
    ];
  }

  public getDate(): number {
    return this.dt && this.dt.getTime() || new Date().getTime();
  }

  public today(): void {
    this.dt = new Date();
  }

  public d20090824(): void {
    this.dt = moment('2009-08-24', 'YYYY-MM-DD')
      .toDate();
  }

  public disableTomorrow(): void {
    this.dateDisabled = [{date: this.tomorrow, mode: 'day'}];
  }

  // todo: implement custom class cases
  public getDayClass(date: any, mode: string): string {
    if (mode === 'day') {
      let dayToCheck = new Date(date).setHours(0, 0, 0, 0);

      for (let event of this.events) {
        let currentDay = new Date(event.date).setHours(0, 0, 0, 0);

        if (dayToCheck === currentDay) {
          return event.status;
        }
      }
    }

    return '';
  }

  public disabled(date: Date, mode: string): boolean {
    return ( mode === 'day' && ( date.getDay() === 0 || date.getDay() === 6 ) );
  }

  public open(): void {
    this.opened = !this.opened;
  }

  public clear(): void {
    this.dt = void 0;
    this.dateDisabled = undefined;
  }

  public toggleMin(): void {
    this.dt = new Date(this.minDate.valueOf());
  }
}