Issue #2928801 by xurizaemon, ericgsmith, geek-merlin, RoSk0, Gauravvvv, Rinku...

namespace Drupal\file\Plugin\Field\FieldFormatter;

use Drupal\Core\Field\Attribute\FieldFormatter;

use Drupal\Core\Field\FieldDefinitionInterface;

use Drupal\Core\Field\FieldItemListInterface;

use Drupal\Core\Field\FormatterBase;

use Drupal\Core\StringTranslation\ByteSizeMarkup;

use Drupal\Core\StringTranslation\TranslatableMarkup;

/**

 * Formatter that shows the file size in a human readable way.

 * Formatter that shows the file byte size in a human-readable way.

 */

#[FieldFormatter(

  id: 'file_size',

  label: new TranslatableMarkup('File size'),

  label: new TranslatableMarkup('Bytes (KB, MB, ...)'),

  field_types: [

    'integer',

  ],

)]

class FileSize extends FormatterBase {

  /**

   * {@inheritdoc}

   */

  public static function isApplicable(FieldDefinitionInterface $field_definition) {

    return parent::isApplicable($field_definition) && $field_definition->getName() === 'filesize';

  }

  /**

   * {@inheritdoc}

   */