{% if composer_slots %}
    {% load composer_tags %}
{% endif %}

<div id="header">
    {% if composer_slots.header %}
        {% composer header %}
    {% else %}
        Header slot
    {% endif %}
</div>
<div id="content">
    {% block content %}
    {% if composer_slots.content %}
        {% composer content %}
    {% else %}
        Content slot
    {% endif %}
    {% endblock %}
</div>
<div id="footer">
    {% if composer_slots.footer %}
        {% composer footer %}
    {% else %}
        Footer slot
    {% endif %}
</div>
