Gravity Forms jQuery Fix

extras.php

/**
 * Gravity Forms jQuery fix
 */

function gc_deregister_default_jquery() {
  wp_deregister_script('jquery');
}
add_action('wp_enqueue_scripts', __NAMESPACE__ . '\\gc_deregister_default_jquery');

function inject_jquery_above_gravity_form($content = '') {
  global $jquery_already_injected;

  if ( !isset($jquery_already_injected) ) {
    $jquery_already_injected = true;
    $content .= "</script>\n";
    $content .= "<script src='https://code.jquery.com/jquery-1.12.4.min.js'></script>\n";
    $content .= "<script>";
  }

  return $content;
}
add_filter('gform_cdata_open', __NAMESPACE__ . '\\inject_jquery_above_gravity_form');

function enqueue_jquery() {
  global $jquery_already_injected;

  if (!isset($jquery_already_injected)) {
    wp_enqueue_script('jquery');
  } else {
    wp_enqueue_script('jquery', '//fake-jquery-script.js', [], null);

    function gc_remove_fake_jquery_script($tag) {
      $tag = (strpos($tag, 'fake-jquery-script') !== false) ? '' : $tag;
      return $tag;
    }
    add_filter('script_loader_tag', __NAMESPACE__ . '\\gc_remove_fake_jquery_script');
  }
}
add_action('wp_footer', __NAMESPACE__ . '\\enqueue_jquery', 9);