@wordpress/upload-media/build-module/validate-file-size.js

Core media upload logic.

/**
 * WordPress dependencies
 */
import { __, sprintf } from '@wordpress/i18n';

/**
 * Internal dependencies
 */
import { UploadError } from './upload-error';

/**
 * Verifies whether the file is within the file upload size limits for the site.
 *
 * @param file              File object.
 * @param maxUploadFileSize Maximum upload size in bytes allowed for the site.
 */
export function validateFileSize(file, maxUploadFileSize) {
  // Don't allow empty files to be uploaded.
  if (file.size <= 0) {
    throw new UploadError({
      code: 'EMPTY_FILE',
      message: sprintf(
      // translators: %s: file name.
      __('%s: This file is empty.'), file.name),
      file
    });
  }
  if (maxUploadFileSize && file.size > maxUploadFileSize) {
    throw new UploadError({
      code: 'SIZE_ABOVE_LIMIT',
      message: sprintf(
      // translators: %s: file name.
      __('%s: This file exceeds the maximum upload size for this site.'), file.name),
      file
    });
  }
}
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