Safe url data transfer from Javascript to Drupal

  Drupal.safe_encode = function(element) {
    var encode = encodeURIComponent(JSON.stringify(element));
    var base64 = Base64.encode(encode);
    base64 = base64.replace('/', '_');
    base64 = base64.replace('+', '-');
    return base64;
  };
  var base64 = Drupal.safe_encode(object);
  var url = Drupal.url('module-url?component_data='+ base64);

function getComponentData() {
    $component_data = \Drupal::request()->query->get('component_data');
    $payload = str_replace('_', '/', $component_data);
    $payload = str_replace('-', '+', $payload);
    $payload = base64_decode($payload);
    $json = urldecode($payload);
    $json = Json::decode($json);
    return $json;
}