pfr/ui/node/node_modules/npm/lib/utils/format-bytes.js

// Convert bytes to printable output, for file reporting in tarballs
// Only supports up to GB because that's way larger than anything the registry
// supports anyways.

const formatBytes = (bytes, space = true) => {
  let spacer = ''
  if (space)
    spacer = ' '

  if (bytes < 1000) // B
    return `${bytes}${spacer}B`

  if (bytes < 1000000) // kB
    return `${(bytes / 1000).toFixed(1)}${spacer}kB`

  if (bytes < 1000000000) // MB
    return `${(bytes / 1000000).toFixed(1)}${spacer}MB`

  return `${(bytes / 1000000000).toFixed(1)}${spacer}GB`
}

module.exports = formatBytes