utils.js

function toStr(value) {
  return value ? value.toString() : '';
}

function onlyNumbers(input) {
  return toStr(input).replace(/\D+/g, '') || '0';
}

function between(min, n, max) {
  return Math.max(min, Math.min(n, max));
}

function fixed(precision) {
  return between(0, precision, 20);
}

function numbersToCurrency(numbers, precision) {
  const exp = 10 ** precision;
  const float = parseFloat(numbers) / exp;
  return float.toFixed(fixed(precision));
}

function addThousandSeparator(integer, separator) {
  return integer.replace(/(\d)(?=(?:\d{3})+\b)/gm, `$1${separator}`);
}

function joinIntegerAndDecimal(integer, decimal, separator) {
  return decimal ? integer + separator + decimal : integer;
}

function format(input = 0, opt) {
  const value = typeof input === 'number' ? input.toFixed(fixed(opt.precision)) : (input || '0');
  const numbers = onlyNumbers(value);
  const currency = numbersToCurrency(numbers, opt.precision);
  const parts = toStr(currency).split('.');
  const [integerDirty, decimal] = parts;
  const integer = addThousandSeparator(integerDirty, opt.thousands);
  return [
    opt.prefix,
    joinIntegerAndDecimal(integer, decimal, opt.decimal)
  ].join('');
}

function setCursor(el, position) {
  function setSelectionRange() {
    el.setSelectionRange(position, position);
  }
  if (el === document.activeElement) {
    setSelectionRange();
    setTimeout(setSelectionRange, 1); // Android Fix
  }
}

export { format, setCursor };