@danielkalen/simplybind/benchmarks/src/bower_components/aurelia-binding/doc/example/binding-value-converters/simple-converter/currency-format.js

Magically simple, framework-less one-way/two-way data binding for frontend/backend in ~5kb.

import * as numeral from 'numeral';

export class CurrencyFormatValueConverter {
  toView(value) {
    return numeral(value).format('($0,0.00)');
  }
}