@angular-stdlib/date

WARNING - Library is under development and may have API breaking changes for versions prior to 1.0.0.

Installation

Angular	@angular-stdlib/date
7	0.x

Install @angular-stdlib/date from npm:

npm install @angular-stdlib/date --save

Features

DateHttpInterceptor

@angular-stdlib/date provides an interceptor that intercepts HTTP calls and converts from JSON response body : ISO 8601 date and datetime strings to native Date object.

To automatically use this interceptor, simply provide DateHttpInterceptor as HTTP_INTERCEPTORS with multi flag enabled to keep Angular behavior:

import { DateHttpInterceptor } from '@angular-stdlib/date';

@NgModule({
  declarations: [AppComponent],
  providers: [
    { provide: HTTP_INTERCEPTORS, useClass: DateHttpInterceptor, multi: true}
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

NOTE - DateHttpInterceptor for projects using dependencies like ngx-bootstrap/datepicker, this one does not handle "ISO string dates" unlike Angular.
Linked to this open issue: https://github.com/valor-software/ngx-bootstrap/issues/4487

DateFormatter

DateFormatter is a static class that provides :

• ISO_DATE string format (yyyy-MM-dd) to use with Angular DatePipe.
• toFakeSerializedDate(date: Date) method : transforms the param date in the same way as it would be serialized :
  • Serialization uses JSON.stringify method which use the toJSON() date method which transforms the date into UTC Z.
  • Only use when you have to serialize dates and you don't want serialization to apply zero UTC offset transformation.

DateValidators

Provides a set of built-in validators for Dates that can be used by form controls :

• date : Validator that requires the control's value to be a Date :

  const control = new FormControl(123, DateValidators.date);
  console.log(control.errors); // {date: true}
  

• beforeDate : Validator that requires the control's value to be prior than the date in parameter :

  const control = new FormControl(new Date('2020-01-01'), DateValidators.beforeDate(new Date('2019-01-01')));
  console.log(control.errors); // {beforeDate: true}
  

  With optional dateName parameter :

  const control = new FormControl(new Date('2020-01-01'), DateValidators.beforeDate(new Date('2019-01-01'), 'birthdate'));
  console.log(control.errors); // {beforeDate: {dateName: 'birthdate'}}
  

• notBeforeDate : Validator that requires the control's value not to be prior than the date in parameter :

  const control = new FormControl(new Date('2019-01-01'), DateValidators.notBeforeDate(new Date('2020-01-01')));
  console.log(control.errors); // {notBeforeDate: true}
  

  With optional dateName parameter :

  const control = new FormControl(new Date('2019-01-01'), DateValidators.notBeforeDate(new Date('2020-01-01'), 'birthdate'));
  console.log(control.errors); // {notBeforeDate: {dateName: 'birthdate'}}
  

• afterDate : Validator that requires the control's value to be later than the date in parameter :

  const control = new FormControl(new Date('2019-01-01'), DateValidators.afterDate(new Date('2020-01-01')));
  console.log(control.errors); // {afterDate: true}
  

  With optional dateName parameter :

  const control = new FormControl(new Date('2019-01-01'), DateValidators.afterDate(new Date('2020-01-01'), 'birthdate'));
  console.log(control.errors); // {afterDate: {dateName: 'birthdate'}}
  

• notAfterDate : Validator that requires the control's value not to be later than the date in parameter :

  const control = new FormControl(new Date('2020-01-01'), DateValidators.notAfterDate(new Date('2019-01-01')));
  console.log(control.errors); // {notAfterDate: true}
  

  With optional dateName parameter :

  const control = new FormControl(new Date('2020-01-01'), DateValidators.notAfterDate(new Date('2019-01-01'), 'birthdate'));
  console.log(control.errors); // {notAfterDate: {dateName: 'birthdate'}}
  

NOTE - For beforeDate, notBeforeDate, afterDate and notAfterDate, if control's value is not a Date, validation will always be a success.
To check date format, combine previous validator with DateValidators.date.