country-currency-utils

country-currency-utils is a comprehensive npm package providing country and currency data for all countries. It offers an extensive set of utilities for handling monetary amounts efficiently, including formatting, rounding, and accessing currency symbols. This package ensures accurate monetary representation and simplifies working with detailed country and currency information.

Installation

To install the package, run:

npm install country-currency-utils

or

yarn add country-currency-utils

Countries and Currencies data

The package hosts country and currency data via CDN URLs:

COUNTRIES_DETAILS_URL, CURRENCIES_DETAILS_URL

• Countries: Countries JSON
• Currencies: Currencies JSON

# Countries
https://cdn.jsdelivr.net/gh/headlesstech/country-currency-utils@main/data/countries.json

# Currencies
https://cdn.jsdelivr.net/gh/headlesstech/country-currency-utils@main/data/currencies.json

---

Country utilities

Type references

type TCountryDetails = {
  name: string; // Country name
  dialCode: string; // Country dial code
  currencyCode: string; // Country currency code
  flagEmoji: string; // Country flag emoji
};

type TCountryData = TCountryDetails & {
  countryCode: string; // ISO 3166 country code
};

Available functions

getAllCountryDetails

Reference

getAllCountryDetails(): Promise<Record<string, TCountryDetails>>

Return all country details in Object format. The key in object is Country Code (ISO 3166).

getAllCountryData

Reference

getAllCountryData(): Promise<TCountryData[]>

Return all country data in array format.

getCountryData

Reference

getCountryData(countryCode: string): Promise<TCountryData | undefined>

Return country data given a country code.

Example:

const countryData = getCountryData("BD");

getCountriesData

Reference

getCountriesData(countryCodes: string[]): Promise<(TCountryData | undefined)[]>

Return multiple countries data given array of country codes.

Example:

const countriesData = getCountriesData(["US", "BD"]);

---

Currencies utilities

Type references

type TCurrencyDetails = {
  name: string; // Currency name
  demonym: string; // Currency demonym
  majorSingle: string; // Major unit name in singular form (e.g. Dollar)
  majorPlural: string; // Major unit name in plural form (e.g. Dollars)
  symbol: string; // Currency symbol (e.g. $, CA$)
  symbolNative: string; // Currency symbol in native language (e.g. $)
  symbolPreferred: string; // preferred currency symbol, used for display
  minorSingle: string; // Minor unit name in singular form (e.g. Cent)
  minorPlural: string; // Minor unit name in plural form (e.g. Cents)
  decimals: number; // Number of decimal places, used for standard display
  decimalsCompact: number; // Number of decimal places, used for compact display
  digitGrouping: 2 | 3; // Digit grouping for formatting (e.g. 2 for 1,00,000, 3 for 100,000)
};

type TCurrencyData = TCurrencyDetails & {
  currencyCode: string; // ISO 4217 currency codes
};

Available functions

getAllCurrencyDetails

Reference

getAllCurrencyDetails(): Promise<Record<string, TCurrencyDetails>>

Return all currency details in Object format. The key in object is Currency Code (ISO 4217).

getAllCurrencyData

Reference

getAllCurrencyData(): Promise<TCurrencyData[]>

Return all currency data in array format.

getCurrencyData

Reference

getCurrencyData(currencyCode: string): Promise<TCurrencyData | undefined>

Returns Currency data given a currency code

Example:

const currencyData = getCurrencyData("BDT");

getCurrenciesData

Reference

getCurrenciesData(currencyCodes: string[]): Promise<(TCurrencyData | undefined)[]>

Returns Currencies data given am array of currency codes

Example:

const currenciesData = getCurrenciesData(["USD", "BDT"]);

---

Amount Formatting Utilities

There are many functions and utilities that may be required when handling monetory amounts. Here are a list of functions:

getRoundedAmount

getRoundedAmount(amount: number, decimals: number, isRoundMiddle?: boolean): number

The default behavior is to ceil the amount to the specified decimal places. This is because we want to maximize the monetory amount. However, use the isRoundMiddle param to use actual rounding

Example:

const roundedAmount = getRoundedAmount(123.4517, 2); // 123.46
const roundedAmount = getRoundedAmount(123.4517, 2, true); // 123.45

getRoundedAmountOnCurrency

type TCurrencyRoundOptions = {
  isRoundMiddle?: boolean; // Default: Math.ceil, isRoundMiddle uses Math.round
  isDecimalsStandard?: boolean; // Default: compact decimals, This: standard decimals
};

getRoundedAmountOnCurrency(amount: number, currencyData?: TCurrencyData, options?: TCurrencyRoundOptions): number

This uses the getRoundedAmount function internally to round on details of a currency code. Default behavior is to use the decimalsContact decimal places, but this can be overridden using isDecimalsStandard

Example:

const USDCurrencyData = await getCurrencyData("USD");
const BDTCurrencyData = await getCurrencyData("BDT");

const roundedAmount = getRoundedAmountOnCurrency(123.4567, USDCurrencyData); // 123.46
const roundedAmount = getRoundedAmountOnCurrency(123.45, BDTCurrencyData); // 124
const roundedAmount = getRoundedAmountOnCurrency(123.45, BDTCurrencyData, {
  isDecimalsStandard: true,
}); // 123.45

Note: You will notice that we are having to run a promise to get CurrencyData and then round/format/display monetory amount. When handling many countries and currencies, it is better to fetch data and then use it, rather that keeping a list of countries and currencies as data or as constant in code base. This keeps codebase light. However if you are handling single currency or just a few currencies. You can keep a list of currencies data and use it directly in function in stead of fetching through an async call.

getFormattedAmount

getFormattedAmount(amount: number, digitGrouping: number, fixedDecimals?: number): string

Returns a string with comma separated amount. digitGrouping maybe 2 or 3. fixedDecimals pads the decimal places with 0s or truncates (does not round) extra decimal places.

Example:

const formattedAmount = getFormattedAmount(123456.7, 2); // "1,23,456.7"
const formattedAmount = getFormattedAmount(123456.7, 3); // "123,456.7"
const formattedAmount = getFormattedAmount(123456.7, 2, 2); // "1,23,456.70"
const formattedAmount = getFormattedAmount(123456.789, 3, 2); // "123,456.78"

getFormattedAmountOnCurrency

type TCurrencyFormatOptions = TCurrencyRoundOptions & {
  avoidRound?: boolean; // avoids rounding amount
  avoidFixedDecimals?: boolean; // default behavior is to have fixed decimals
};

getFormattedAmountOnCurrency(amount: number, currencyData?: TCurrencyData, options?: TCurrencyFormatOptions): string

Formats the given amount according to the currency's standard decimal places and digit grouping and returns it as a string. The function by default rounds the number and formats on the currency definitions. The options inherits from rounding options. avoidRound avoids rounding the amount. avoidFixedDecimals avoids using fixed decimals defined from currency.

Example:

const USDCurrencyData = await getCurrencyData("USD");
const BDTCurrencyData = await getCurrencyData("BDT");

const formattedAmount = getFormattedAmountOnCurrency(123456.7, USDCurrencyData); // "123,456.70"
const formattedAmount = getFormattedAmountOnCurrency(
  123456.7,
  USDCurrencyData,
  {
    avoidFixedDecimals: true,
  }
); // "123,456.7"
const formattedAmount = getFormattedAmountOnCurrency(123456.7, BDTCurrencyData); // "1,23,457"
const formattedAmount = getFormattedAmountOnCurrency(
  123456.7,
  BDTCurrencyData,
  {
    avoidRound: true,
  }
); // "1,23,456.7"

getDisplayAmountOnCurrency

type TCurrencyDisplayOptions = TCurrencyFormatOptions & {
  avoidFormat?: boolean; // Default: format amount
  isSymbolStandard?: boolean; // Default: preferredSymbol, isSymbolStandard: standard symbol
  isSymbolNative?: boolean; // Default: preferredSymbol, isSymbolNative: symbolNative
  separator?: string; // Default: space between symbol and amount, can be changed
};

getDisplayAmountOnCurrency(amount: number, currencyData?: TCurrencyData, options?: TCurrencyFormatOptions): string

Returns a displayable amount with currency symbol, rounded by default and uses proper digit grouping on currency. avoidFormat avoid formatting. isSymbolStandard and isSymbolNative defined the symbol to use, default is to use preferredSymbol. separator can be used define separator string between symbol and amount. The function inherits options for rounding and formatting

Example:

const USDCurrencyData = await getCurrencyData("USD");
const BDTCurrencyData = await getCurrencyData("BDT");

const displayAmount = getDisplayAmountOnCurrency(123.4567, USDCurrencyData); // "$ 123.46"
const displayAmount = getDisplayAmountOnCurrency(123456.7, USDCurrencyData); // "$ 123,456.70"
const displayAmount = getDisplayAmountOnCurrency(123456.7, USDCurrencyData, {
  avoidFormat: true,
}); // "$ 123456.7"
const displayAmount = getDisplayAmountOnCurrency(123456.7, USDCurrencyData, {
  separator: "",
}); // "$123,456.70"
const displayAmount = getDisplayAmountOnCurrency(123.4567, BDTCurrencyData); // "Tk 124"
const displayAmount = getDisplayAmountOnCurrency(123.4567, BDTCurrencyData, {
  isSymbolStandard: true,
}); // "৳ 124"

getDisplayAmountOnCurrencyCode

getDisplayAmountOnCurrencyCode(amount: number, currencyCode: string, options?: TCurrencyFormatOptions): Promise<string>

Returns a displayable amount with currency symbol, using the getDisplayAmountOnCurrency function and looks up currency details on currency code

Example:

const displayAmount = await getDisplayAmountOnCurrencyCode(123.4567, "USD"); // "$ 123.46"
const displayAmount = await getDisplayAmountOnCurrencyCode(123456.7, "USD"); // "$ 123,456.70"
const displayAmount = await getDisplayAmountOnCurrencyCode(123456.7, "USD", {
  avoidFormat: true,
}); // "$ 123456.7"
const displayAmount = await getDisplayAmountOnCurrencyCode(123456.7, "USD", {
  separator: "",
}); // "$123,456.70"
const displayAmount = await getDisplayAmountOnCurrencyCode(123.4567, "BDT"); // "Tk 124"
const displayAmount = await getDisplayAmountOnCurrencyCode(123.4567, "BDT", {
  isSymbolStandard: true,
}); // "৳ 124"

Testing

All data and functions have been tested using Jest.

License

This project is licensed under the MIT License

Developed By

Headless Technologies Limited

A software, hardware, and AI company building solutions on tech.

Support

If you find this package useful, please consider starring the repository on GitHub to show your support!

Contribution

Developers are welcome to create issues and pull requests.