gistfile1.twig

<script type="text/javascript">
            {% spaceless %}
                {% set routeParams = {} %}

                {% for k in app.request.attributes.all|keys %}
                    {% if k|first != '_' %}
                        {% set routeParams = routeParams|merge({(k): app.request.attributes.all[k]}) %}
                    {% endif %}
                {% endfor %}

                {% for k in app.request.query.all|keys %}
                    {% if k|first != '_' %}
                        {% set routeParams = routeParams|merge({(k): app.request.query.all[k]}) %}
                    {% endif %}
                {% endfor %}
            {% endspaceless %}
            var routeData = {{ routeParams|json_encode|raw }};
        </script>