export const formatCurrency = (
  value: number,
  currency = 'USD',
  locale = 'en-US',
) =>
  new Intl.NumberFormat(locale, {
    style: 'currency',
    currency,
  }).format(value);

// Usage
formatCurrency(1234.56);              // "$1,234.56"
formatCurrency(1234.56, 'EUR', 'de'); // "1.234,56 €"
formatCurrency(1234.56, 'JPY', 'ja'); // "￥1,235"