Angular: How to display a date in French format

Question

I am an Angular beginner, I read the documentation of Angular, and it's hard for such an elementary thing... I want that the dates and other things in my application have the French locale, and not the default 'en-US'...

I started to read this Angular documentation, that seems a little bit incomplete, cause, I did the doc states, and failed:

>...\ClientApp>ng serve --configuration=fr
Configuration 'fr' could not be found in project 'ClientApp'.

OK, now I look on another documentation page on the Date pipe. It states:

{{ value_expression | date [ : format [ : timezone [ : locale ] ] ] }}

but ANY example on how to use the locale, so, I tried to do it in a test application link, like this {{myDate | date: 'medium': undefined : 'fr'}} but it displays nothing... I have in the console:

ERROR
Error: InvalidPipeArgument: 'Missing locale data for the locale "fr".' for pipe 'DatePipe'

what else should I do or install to display in Angular a date in the French format?

Angular CLI: 6.1.5
Node: 8.11.1
OS: win32 x64
Angular: 6.1.8

Answer 1

Try adding to your app module the following code

import { registerLocaleData } from '@angular/common';
import localeFr from '@angular/common/locales/fr';

// the second parameter 'fr' is optional
registerLocaleData(localeFr, 'fr');

https://angular.io/guide/i18n#i18n-pipes

EDIT: Then if you want to sets this locale as default you need to set the LOCALE_ID injection token as 'fr' like that :

{provide: LOCALE_ID, useValue: 'fr' }

In your app module

Hope it helps