how to format currency with ng mask code example

Example: ng2 currency mask

import { CurrencyMaskConfig, CurrencyMaskModule, CURRENCY_MASK_CONFIG } from 'ng2-currency-mask';

export const CustomCurrencyMaskConfig: CurrencyMaskConfig = {
    align: "right",
    allowNegative: true,
    decimal: ",",
    precision: 2,
    prefix: "R$ ",
    suffix: "",
    thousands: "."
};

@NgModule({
    imports: [
        ...
        CurrencyMaskModule
    ],
    declarations: [...],
    providers: [
        { provide: CURRENCY_MASK_CONFIG, useValue: CustomCurrencyMaskConfig }
    ],
    bootstrap: [AppComponent]
})
export class AppModule {}