Method append

src/form-data-wrapper.js:201–208

* @param {string} name * @param {string|!File} value * @param {string=} opt_filename * @override

(name, value, opt_filename)

   * @override
   */
  append(name, value, opt_filename) {
    // Safari 11 breaks on submitting empty File values.
    if (value && typeof value == 'object' && isEmptyFile(value)) {
      this.formData_.append(name, new Blob([]), opt_filename || '');
    } else {
      this.formData_.append(name, value);
    }
  }
}

/**