The following code is working for text field, but it's not working for image field.

function THEMENAME_form_system_theme_settings_alter(&$form, FormStateInterface &$form_state, $form_id = NULL) {
  $form['check'] = array(
    '#title' => t("Show Image file"),
    '#type' => 'checkbox',

  $form['banner_image'] = array(
    '#title' => t('User Image'),
    '#type' => 'managed_file',
    '#default_value' => theme_get_setting('banner_image'),
    '#upload_location' => 'public://',
    '#upload_validators' => array(
      'file_validate_extensions' => array('gif png jpg jpeg'),
      'file_validate_size' => array(1048576),
    '#states' => array(
      "visible" => array(
        "input[name='check']" => array("checked" => TRUE)),

Can any one suggest how to implement this?

  • 1
    It weird because this issue should be committed. – Jimmy Ko Aug 10 '16 at 14:04

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