{% if src is empty %}   
    <div class="ui segment image fluid rounded opacity-25">
        <div class="ui center aligned text-center bordered">
            <i class="icon massive image outline fluid"></i> 
        </div>  
    </div>            
{% else %}
    <a class="image-preview-button" data-src="{{ src }}">
        <img class="ui image fluid rounded bordered" src="{{ src }}">   
    </a>           
{% endif %}