{% load i18n %}
<a href="{{ url }}?sort={% if sort == field %}-{% endif %}{{ field }}">
    {{ text }}
    {% if sort == field %}
    <span class="icon icon-arrow-down">
        <span class="is-sr-only">{% trans "Sorted asccending" %}</span>
    </span>
    {% elif sort == "-"|add:field %}
    <span class="icon icon-arrow-up">
        <span class="is-sr-only">{% trans "Sorted descending" %}</span>
    </span>
    {% endif %}
</a>