Tweak currencyFormat to display currency when it's not USD

src/app/shared/currency-format.pipe.ts

@@ -1,6 +1,15 @@
 import { Pipe, PipeTransform } from '@angular/core';
 import { DecimalPipe } from '@angular/common';
 
+// Format the currency according to the user's browser locale.
+//
+// Some currencies share the same symbol (e.g. $ is used for USD and CAN).
+// Ideally, the user experience should not be confusing if different accounts
+// have conflicting symbols. One solution might be to always show the ISO
+// currency code for accounts with mixes currencies. Another solution would be
+// to let the user configure how the currency is displayed on a per-currency
+// or per-account basis.
+
 @Pipe({ name: 'currencyFormat' })
 export class CurrencyFormatPipe implements PipeTransform {
   constructor(private decimalPipe: DecimalPipe) {
@@ -11,17 +20,12 @@ export class CurrencyFormatPipe implements PipeTransform {
       return '';
     }
 
-    let prefix = amount < 0 ? '-' : '';
-
-    if(currency === 'USD') {
-      prefix += '$';
-    }
-
-    let minDigits = Math.min(2, precision);
-    
-    return prefix + 
-      this.decimalPipe.transform(
-        Math.abs(amount) / Math.pow(10, precision),
-        '1.' + minDigits + '-' + precision);
+    // note: we can drop the cast to any if we change the ts target from es5 to es2020 or newer.
+    return Intl.NumberFormat(navigator.language, {
+      style: "currency",
+      currency,
+      minimumFractionDigits: precision,
+      signDisplay: "negative",
+    } as any).format(amount / Math.pow(10, precision));
   }
 }