function fbmcc_setupCustomerChat()

in script.js [14:48]
15 lines of code
2 McCabe index (conditional complexity)

function fbmcc_setupCustomerChat() {
  const FACEBOOK_URL = "https://www.facebook.com";
  var baseURL = "https://www.facebook.com/customer_chat/dialog/?domain=";
  var urlParam = encodeURI(
    window.location.protocol
    + '//'
    + window.location.hostname
    + (window.location.port ? ':' + window.location.port : '')
  );
  var customerWindow = window.open(
    baseURL + urlParam,
    "_blank",
    "width=1200,height=800"
  );

  jQuery(window).on("message", function(e) {
    if (e.originalEvent.origin === FACEBOOK_URL) {
      $data_json = JSON.parse(e.originalEvent.data);
      var data = {
        'action' : 'fbmcc_update_options',
        'pageID' : fbmcc_sanitizeNumbersOnly($data_json["pageID"]),
        'locale' : fbmcc_sanitizeLocale($data_json["locale"]),
        '_wpnonce' : ajax_object.nonce,
      };
      jQuery.ajax({
        type: 'POST',
        url: ajax_object.ajaxurl,
        data: data,
        success: function(results) {
          jQuery('#fbmcc-page-params').css('display', 'inline-block');
        }
      });
    }
  });
}