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🏠 » Javascript » Tutorial To Change Date Format Ng-bootstrap Datepicker Angular 5

Tutorial To Change Date Format Ng-bootstrap Datepicker Angular 5

By Sigit Prasetya Nugroho ∙ April 27, 2018 ∙ Javascript ∙ 15 Comments

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Here’s an easy way to change the date format on the ng-bootstrap datepicker angular 5. I got this way via ng-bootstrap official github and I have tested its success. If you use the ng-bootstrap module to run the css bootstrap framework component without jQuery, there are few constraints such as changing the date format according to the format you need. Ng-bootstrap implements ISO 8601 for date format. Follow this short tutorial

Read more: Tutorial Simple CRUD Angular 5 And Lumen 5.6 For Beginners

Change Date Format Ng Bootstrap Datepicker

On the ng-bootstrap official site, datepicker has yyyy-mm-dd format, to change to “dd/mm/yyyy” you need to create a new class to extend the NgbDateParserFormatter class .

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Create a new ts file named dateformat.ts and copy the following code

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import { NgbDateParserFormatter, NgbDateStruct } from '@ng-bootstrap/ng-bootstrap';
import { Injectable } from '@angular/core';
import { isNumber, toInteger, padNumber } from '@ng-bootstrap/ng-bootstrap/util/util';
 
@Injectable()
export class NgbDateCustomParserFormatter extends NgbDateParserFormatter {
  parse(value: string): NgbDateStruct {
    if (value) {
      const dateParts = value.trim().split('/');
      if (dateParts.length === 1 && isNumber(dateParts[0])) {
        return {day: toInteger(dateParts[0]), month: null, year: null};
      } else if (dateParts.length === 2 && isNumber(dateParts[0]) && isNumber(dateParts[1])) {
        return {day: toInteger(dateParts[0]), month: toInteger(dateParts[1]), year: null};
      } else if (dateParts.length === 3 && isNumber(dateParts[0]) && isNumber(dateParts[1]) && isNumber(dateParts[2])) {
        return {day: toInteger(dateParts[0]), month: toInteger(dateParts[1]), year: toInteger(dateParts[2])};
      }
    }
    return null;
  }
 
  format(date: NgbDateStruct): string {
    return date ?
        `${isNumber(date.day) ? padNumber(date.day) : ''}/${isNumber(date.month) ? padNumber(date.month) : ''}/${date.year}` :
        '';
  }
}

then import the class on the angular component that is using the datepicker.

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import { NgbDateCustomParserFormatter} from '../../../../filter/dateformat';

Then add the provider to the component that will use the class

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@Component({
  selector: '....',
  templateUrl: '....',
  styleUrls: ['....'],
  animations: [....],
  host: { '....' },
  providers: [
    {provide: NgbDateParserFormatter, useClass: NgbDateCustomParserFormatter}
   ]
})

Please run your application and test the result. If successful then the application goes like the following picture

Tutorial Change Date Format Datepicker Ng Bootstrap Angular 5

Source code: https://github.com/ng-bootstrap/ng-bootstrap/issues/2072

Read another article:Angular 4 Tutorial For Beginner With Simple App Project

So a quick tutorial on how to change the date format on ng-bootstrap datepicker angular 5.

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Avatar for Sigit Prasetya Nugroho

About Sigit Prasetya Nugroho

This site is a personal Blog of Sigit Prasetya Nugroho, a Desktop developer and freelance web developer working in PHP, MySQL, WordPress.

Reader Interactions

Comments

  1. Avatar for Akhil VargheseAkhil Varghese says

    November 27, 2018 at 1:01 pm

    Hi,
    The article is quite useful and easy to understand.
    Using angular 7. When the dateformat.ts is used, it is showing compilation error as ‘Module not found: Error: Can’t resolve ‘@ng-bootstrap/ng-bootstrap/util/util’ in the above file. Please advise.

    Reply
    • Avatar for Sigit Prasetya NugrohoSigit Prasetya Nugroho says

      November 28, 2018 at 8:47 am

      dear akhil,
      sory im using angular 5 🙂

      i will update to angular 7 immediatly

      Reply
  2. Avatar for SheelSheel says

    February 5, 2019 at 8:24 pm

    New Angular rules have removed the ability to use the util/util in @ngBootstrap. Just copy the functions you need into the component you’re needed them in instead of importing util.

    Reply
    • Avatar for DiptiDipti says

      June 26, 2019 at 3:16 pm

      Do you have any working sample ?

      Reply
      • Avatar for Sigit Prasetya NugrohoSigit Prasetya Nugroho says

        June 26, 2019 at 3:33 pm

        What is your angular version? I have never tried it again after version 5

        Reply
        • Avatar for DiptiDipti says

          June 27, 2019 at 3:44 pm

          I have angular 7, ng-bootstrap/ng-bootstrap: “4.2.1”
          I am not able to load the css as well, I have added the stylesheet in index.html. If you have any example pls share. thanks

          Reply
  3. Avatar for MartinMartin says

    June 11, 2019 at 11:08 am

    Hi, I don´t understand what you need by your last comment. I have the same error util/util so you recommend to delete all imports and also things in providers and just past all code to component? Or if you could put here small example.

    Reply
  4. Avatar for DiptiDipti says

    June 26, 2019 at 3:04 pm

    Anyone has working example for this?

    Reply
  5. Avatar for DiptiDipti says

    June 27, 2019 at 3:40 pm

    I have angular 7, ng-bootstrap/ng-bootstrap: “4.2.1”
    I am not able to load the css as well, I have added the stylesheet in index.html. If you have any example pls share. thanks

    Reply
  6. Avatar for SudarSudar says

    July 5, 2019 at 7:46 am

    Use this util class in the below mentioned path instead of ‘@ng-bootstrap/ng-bootstrap/util/util’ and its working fine in Ang7.

    https://github.com/ng-bootstrap/ng-bootstrap/blob/master/src/util/util.ts

    Reply
    • Avatar for Sigit Prasetya NugrohoSigit Prasetya Nugroho says

      July 5, 2019 at 8:06 am

      thanks

      Reply
  7. Avatar for Rohit N AryaRohit N Arya says

    October 1, 2019 at 12:34 pm

    Sorry, this will be a breaking change in 3.0.0 – we are migrating to Angular package format and as such you will not be able to use “deep” imports.

    I know that this is not what you want to hear but we see this as a “good thing” since util is supposed to be our private implementation detail and not meant to be pubic API…

    This is a very simple utility so feel free to copy it over to your project if you need it:

    https:// github.com/ng-bootstrap/ng-bootstrap/blob/master/src/util/util.ts

    Reply
  8. Avatar for KesavvaKesavva says

    October 10, 2019 at 4:16 pm

    @Dipti, have you got the working example?

    Reply
  9. Avatar for NickNick says

    November 4, 2019 at 11:05 pm

    The solution is to import the functions you need (isNumber, toInteger, padNumber) from here:
    https:// github.com/ng-bootstrap/ng-bootstrap/blob/master/src/util/util.ts

    and remove the
    import { isNumber, toInteger, padNumber } from ‘@ng-bootstrap/ng-bootstrap/util/util’;

    and it simply works.

    Reply
  10. Avatar for JJJJ says

    December 12, 2019 at 2:15 pm

    If u have [maxDate] with this, [masDate] doesn’t work. ¿Any idea?

    Reply

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