numberfmt

Number formatting using a text pattern and native Intl.NumberFormat()

JS provides powerful number formatting with the standard built-in object Intl.NumberFormat, but we find its API a little verbose and hard to grasp its full potential. We took inspiration from older libraries like numbro.js and numeral.js and built a string based pattern for interacting with Intl.NumberFormat. Tiny footprint, no dependencies, works on the browser or nodejs.

import nf from '@tuplo/numberfmt';

// numeric
nf(123_456, '0,0.00'); // → 123,456.00

// currency
nf(123_456, '0,0GBP'); // → £123,456

// digital units
nf(123_456, '0b'); // → 120.56kb

// with locale
nf(123_456, '0,0.00', { locale: 'ar-EG' }); // → ١٢٣٬٤٥٦٫٧٩

// functional programming, partial application
const nfp = nf.partial('0,0.00');
nfp(123_456); // → 123,456.00

$ npm install @tuplo/numberfmt

# or with yarn
$ yarn add @tuplo/numberfmt

An optional set of options can be provided

nf(123_456, '0,0.00', { 
  locale: 'ar-EG',
  numberingSystem: 'arab'
}); // → ١٢٣٬٤٥٦٫٧٩

string | optional | defaults to system locale

The BCP 47 language tag for the locale actually used.

string | optional | derives from locale

Examples: arab, fullwide, hant, latn.

MIT