include only used ngx-bootstrap components

ngx-bootstrap.module.ts

/**
 * Import only used ngx-bootstrap components.
 *
 * @see https://valor-software.com/ngx-bootstrap/#/getting-started
 */
import { Injectable, NgModule } from '@angular/core';
import {
  AlertModule,
  BsDatepickerConfig,
  BsDatepickerModule,
  BsDaterangepickerConfig,
  BsLocaleService,
  CollapseModule,
  ModalModule,
  TabsModule,
} from 'ngx-bootstrap';

const datepickerDefaults: Partial<BsDatepickerConfig> = {
  containerClass: 'theme-default',
  isAnimated: true,
  displayMonths: 1,
};

// overwrite BsLocaleService to be provided for 'root' injector (force single instance)
@Injectable({ providedIn: 'root' })
export class NgxBootstrapLocaleService extends BsLocaleService {}

@NgModule({
  imports: [
    // AccordionModule.forRoot(),
    AlertModule.forRoot(),
    BsDatepickerModule.forRoot(),
    // ButtonsModule.forRoot(),
    // CarouselModule.forRoot(),
    CollapseModule.forRoot(),
    ModalModule.forRoot(),
    // PaginationModule.forRoot(),
    // PopoverModule.forRoot(),
    // ProgressbarModule.forRoot(),
    // RatingModule.forRoot(),
    // SortableModule.forRoot(),
    TabsModule.forRoot(),
    // TimepickerModule.forRoot(),
    // TooltipModule.forRoot(),
    // TypeaheadModule.forRoot(),
  ],
  exports: [
    // AccordionModule,
    AlertModule,
    BsDatepickerModule,
    // ButtonsModule,
    // CarouselModule,
    CollapseModule,
    ModalModule,
    // PaginationModule,
    // PopoverModule,
    // ProgressbarModule,
    // RatingModule,
    // SortableModule,
    TabsModule,
    // TimepickerModule,
    // TooltipModule,
    // TypeaheadModule,
  ],
  providers: [
    {
      provide: BsDatepickerConfig,
      useFactory: () => {
        const config = new BsDatepickerConfig();
        return Object.assign(config, datepickerDefaults);
      },
    },
    {
      provide: BsDaterangepickerConfig,
      useFactory: () => {
        const config = new BsDaterangepickerConfig();
        return Object.assign(config, datepickerDefaults);
      },
    },
    {
      provide: BsLocaleService,
      useExisting: NgxBootstrapLocaleService,
    },
  ],
})
export class NgxBootstrapModule {}