{% macro generate(filename, minWidth = null) %}
    {% if filename is defined and filename is not empty %}
        <link rel="stylesheet" href="{{ asset(filename) }}" media="print" onload="this.media='all'; this.onload=null;">
    {% endif %}
{% endmacro %}

{% macro preload(filename, minWidth = null) %}
    {% if filename is defined and filename is not empty %}
        <link rel="preload" as="style" href="{{ asset(filename) }}">
    {% endif %}
{% endmacro %}