function createFormData(data, previousKey, formData = new FormData()) {
  if (isPlainObject(data)) {
    Object.keys(data).forEach(key => {
      const value = data[key];
      let newKey = key;

      if (isPlainObject(value)) {
        return createFormData(value, key, formData);
      }

      if (previousKey) {
        newKey = `${previousKey}[${key}]`;
      }

      if (isArray(value)) {
        value.forEach((item, index) => {
          if (isPlainObject(item)) {
            createFormData(item, `${newKey}[${index}]`, formData);
          } else {
            formData.append(`${newKey}[${index}]`, item);
          }
        });
      } else {
        formData.append(newKey, value);
      }
    });
  } else if (previousKey) {
    formData.append(previousKey, data);
  }

  return formData;
}