Change language of Datepicker of Material Angular 4

Question

How to Change language of Datepicker of Material Angular? I can't find in documentation for Angular material 2. Here is a plunkr https://plnkr.co/edit/unzlijtsHf3CPW4oL7bl?p=preview

<md-input-container>
  <input mdInput [mdDatepicker]="picker" placeholder="Choose a date">
  <button mdSuffix [mdDatepickerToggle]="picker"></button>
</md-input-container>
<md-datepicker #picker></md-datepicker>

Answer 1

import {MAT_DATE_LOCALE} from '@angular/material';

&

providers: [{ provide: MAT_DATE_LOCALE, useValue: 'es-ES' }]

Do this in tpv.modules.ts

Answer 2

md-datepicker provides setLocale method which can be used to set any language (list of locale).

Here's an example of setting locale to 'fr':

export class DatepickerOverviewExample {
  
  constructor(private dateAdapter: DateAdapter<Date>) {
    this.dateAdapter.setLocale('fr');   
  }
  
}

One thing to keep in mind, md-datepicker's default date parsing format is mm/dd/yyyy, so if a locale has a different date format (for 'fr' its dd/mm/yyyy), we will need to define a class that extends NativeDateAdapter to parse the new date format. Without setting the proper date format, there will be an issue like this question.

import { NativeDateAdapter, DateAdapter, MD_DATE_FORMATS } from "@angular/material/core";
    
export class FrenchDateAdapter extends NativeDateAdapter {
  parse(value: any): Date | null {
    if ((typeof value === 'string') && (value.indexOf('/') > -1)) {
      const str = value.split('/');
      if (str.length < 2 || isNaN(+str[0]) || isNaN(+str[1]) || isNaN(+str[2])) {
        return null;
      }
      return new Date(Number(str[2]), Number(str[1]) - 1, Number(str[0]), 12);
    }
    const timestamp = typeof value === 'number' ? value : Date.parse(value);
    return isNaN(timestamp) ? null : new Date(timestamp);
  }
}

@Component({
  ...
  providers: [{provide: DateAdapter, useClass: FrenchDateAdapter}],
})

Plunker demo

Answer 3

Locale setting can be provided via MAT_DATE_LOCALE constant, but to change language dynamically you need to use DateAdapter as it is shown in https://material.angular.io/components/datepicker/overview#internationalization

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent {

  constructor(private dateAdapter: DateAdapter<any>) {}

  setFrench() {
    // Set language of Datepicker
    this.dateAdapter.setLocale('fr');
  }

}

Here is another example when you need to configure locale from external script:

<script>
  window.appConfig = {
    language: 'fr',
    // Other config options
    // ...
  };
<script>
<app-root></app-root>

In this case you should also use DateAdapter:

import {Injectable} from '@angular/core';
import {DateAdapter} from '@angular/material';

declare let window: any;

@Injectable()
export class AppConfigService {

  appConfig = window.appConfig;

  constructor(private dateAdapter: DateAdapter<any>) {
    // Set language of Datepicker
    this.dateAdapter.setLocale(this.appConfig.language);
  }

}

Answer 4

For anyone who has a bug when editing input field (eg: putting DD/MM/YYYY will change it to MM/DD/YYYY or simply not working) create an adapter:

import { NativeDateAdapter } from '@angular/material';

export class FrenchDateProvider extends NativeDateAdapter {

   parse(value: string) {
      let it = value.split('/');
      if (it.length == 3) {
         return new Date(+it[2], +it[1] - 1, +it[0], 12);
      }
   }

   format(date: Date, displayFormat: Object) {
      return ('0' + date.getDate()).slice(-2) + '/' + ('0' + (date.getMonth() + 1)).slice(-2) + '/' + date.getFullYear();
   }

}

Add it to your module as provider:

@NgModule({
   providers: [
      { provide: DateAdapter, useClass: FrenchDateProvider }
   ]
})
export class SharedModule { }

Answer 5

For me the working solution is similar to vladernn's, however it should be:

import {MAT_DATE_LOCALE} from '@angular/material/core';

and

providers: [{ provide: MAT_DATE_LOCALE, useValue: 'pl' }]

in material.module.ts file.

Difference: new import address and shorter useValue code.

Answer 6

I tried this and worked for me

 constructor(private _adapter: DateAdapter<any>, private translate:TranslateService ) {
 
  this._adapter.setLocale(this.translate.getBrowserLang());

 }