Little helper containint bytes number to string label conversion and viceversa

bytes-conversion.js

const SIZES = ['B', 'KB', 'MB', 'GB', 'TB']

const bytesToSizeString = (bytes) => {
  if (!+bytes || bytes < 0) {
    return `0 ${SIZES[0]}`
  }
  const i = Math.floor(Math.log(bytes) / Math.log(1024))
  return `${parseInt((bytes / Math.pow(1024, i)), 10)} ${SIZES[i]}`
}

const sizeStringToBytes = (size) => {
  if (!size || size < 0) {
    return 0
  }
  const value = (size || '').toString().split(' ')
  return parseInt(value[0], 10) * Math.pow(2, (Math.abs(SIZES.indexOf(value[1])) * 10))
}

export { bytesToSizeString, sizeStringToBytes }