Angular 5 Breaking change – manually import locale

This is really hard to find in the current version :(. Here is what i found out:

The different locales are in the package @angular/common/locales/. In your case this is:

import localeDECH from '@angular/common/locales/de-CH';

Now you need to register this locale definitions in your project. There is a function called registerLocaleData that is located in: @angular/common.

So your code in your app.module.ts should look like this:

import {LOCALE_ID} from '@angular/core';
import { registerLocaleData } from '@angular/common';
import localeDECH from '@angular/common/locales/de-CH';

registerLocaleData(localeDECH);

@NgModule({
...
providers: [
   { provide: LOCALE_ID, useValue: 'de-ch' },
]
...
})
....