public function removeElementClass($class)
    {
        $delClass = [];

        if (is_string($class) || is_array($class)) {
            $delClass = (array) $class;
        }

        foreach ($delClass as $del) {
            if (($key = array_search($del, $this->elementClass))) {
                unset($this->elementClass[$key]);
            }
        }

        return $this;
    }