app/javascript/alchemy_admin/utils/format.js
export function formatFileSize(bytes) {
let exponent = bytes === 0 ? 0 : Math.floor(Math.log(bytes) / Math.log(1024))
// prevent format higher than GB
if (exponent > 3) {
exponent = 3
}
let value = (bytes / Math.pow(1024, exponent)).toFixed(2)
return value + " " + ["B", "kB", "MB", "GB"][exponent]
}