{% spaceless %}{% with fallback_icon_url=icon_light_url|default:icon_dark_url %}
    <picture{{ picture_attrs|default:"" }}>
    {% comment %} Only include source elements if the light and dark icons are different {% endcomment %}
        {% if icon_light_url != icon_dark_url %}
            {% if icon_light_url %}
                <source srcset="{{ icon_light_url }}" media="(prefers-color-scheme: light)" />
            {% endif %} {% if icon_dark_url %}
                <source srcset="{{ icon_dark_url }}" media="(prefers-color-scheme: dark)" />
            {% endif %}
        {% endif %}
        <img{{ img_attrs|default:"" }} src="{{ fallback_icon_url }}"/>
    </picture>
{% endwith %}{% endspaceless %}