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

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

import * as numeral from 'numeral';

export class NumberFormatValueConverter {
  toView(value, format) {
    return numeral(value).format(format);
  }
}