To localize the date pipe in Angular 2, you must supply the LOCALE_ID. I have developed a service called LocaleService that offers an
locale$: Observable<string>BehaviorSubject<string>. I wish for this service to remain fully reactive without adding any additional state. How can I retrieve information from this service when providing the LOCALE_ID?
Utilizing LOCALE_ID when setting the language for your app is efficient for establishing it once, but it lacks the flexibility of changing languages during runtime. For more information, you can refer to my response here.
A pipe in Angular can return an Observable that transforms a date based on the user's locale.
import { Pipe, PipeTransform } from '@angular/core';
import { LocaleService } from 'shared/locale.service';
import { Observable } from 'rxjs/Observable';
import { formatDate } from 'somelibrary';
import 'rxjs/add/operator/map';
@Pipe({
name: 'myDate',
pure: false
})
export class MyDatePipe implements PipeTransform {
constructor(private localeService: LocaleService) { }
transform(date: string): Observable<String> {
return this.localeService.locale$.map(locale => formatDate(date, locale));
}
}
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