example.module

<?php

// Path of our panel.
define('EXMPLE_PATH', 'example');

/**
 * Implements hook_ajax_render_alter().
 */
function example_ajax_render_alter(&$commands) {
  if ($_GET['q'] != EXMPLE_PATH) {
    return;
  }
  
  // Facets that present on the page.
  $facet_delta = array('apache_solr_index_author_name', 'apache_solr_index_type');
  foreach ($facet_delta as $delta) {
    // Load block for facet.
    $block_array = search_api_facets_block_view($delta);
    $delta_class = str_replace('_', '-', $delta);
    // Render block.
    $output = drupal_render($block_array);
    // Show or hide block.
    if (!empty($output)) {
      $commands[] = ajax_command_invoke('.pane-search-api-facets-' . $delta_class, 'show');
      $commands[] = ajax_command_replace('.pane-search-api-facets-' . $delta_class . ' .pane-content .item-list', $output);
    }
    else {
      $commands[] = ajax_command_invoke('.pane-search-api-facets-' . $delta_class, 'hide');
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function example_form_views_exposed_form_alter(&$form, &$form_state) {
  if ($_GET['q'] != EXMPLE_PATH) {
    return;
  }

  // Add action to form so it will work without javascript.
  $form['#action'] = EXMPLE_PATH;
  // Add javascript for facets.
  drupal_add_js(drupal_get_path('module', 'example') . '/example.js');
}