cent <-> formatted conversion

test.js

const currencyFormatter = new Intl.NumberFormat(undefined, { style: 'currency', currency: 'USD' })

/**
 *
 * @param {Intl.NumberFormat} currencyFormatter
 * @returns Number
 */
export const getConvertToCentValue = (currencyFormatter) => (number) => {
  const parts = currencyFormatter.formatToParts(number);
  const string = parts
  .filter(({ type }) => ['integer', 'fraction'].includes(type))
  .reduce((string, { value }) => (string + value), '')

  console.log('string:', string)
  return parseInt(string)
};

/**
 *
 * @param {Intl.NumberFormat} currencyFormatter
 * @returns Number
 */
export const getConvertFromCentValue = (currencyFormatter) => (value) => {
  const resolvedOptions = currencyFormatter.resolvedOptions();
  const decimalPoints = resolvedOptions.maximumFractionDigits;
  const zeroDecimalString = `.${'0'.repeat(decimalPoints)}`;
  const currencyValue = value / parseInt(`1${'0'.repeat(decimalPoints)}`)
  return `${currencyValue}`.replace(zeroDecimalString, '')
};

// Currency-aware functions
const convertToCentValue = getConvertToCentValue(currencyFormatter);
const convertFromCentValue = getConvertFromCentValue(currencyFormatter);

console.log(convertToCentValue('7.50')) // 750
console.log(convertFromCentValue('2090')) // 20.90
console.log(convertFromCentValue('30')) // 30