Format File Size (0,98 KB, 1,5 GB, ...)

formatFileSize.js

let formatFileSize = (bytes) => {
    if (bytes === 0) {
        return '0 B';
    }
    
    const k     = 1024,
          dm    = 3,
          sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
          i     = Math.floor(Math.log(bytes) / Math.log(k));
  
    return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
};