_reactions_images.twig

{% if image is empty %}
    <div class="alert alert-danger">{{ _t('REACTION_NO_IMAGE') }}</div>
{% elseif image matches "/\.(gif|jpeg|png|jpg|svg|webp)$/i" %}
    <img loading="lazy" class="img-responsive" src="{{image}}" alt="" />
{% elseif image matches "/\\p{S}/u" %}
    <span class="reaction-emoji">{{image}}</span>
{% elseif image matches "/^(fa[srb]? fa-*)/i" %}
    <i class="reaction-fa-icons {{image}}"></i>
{% else %}
    <div class="alert alert-danger">{{ _t('REACTION_BAD_IMAGE_FORMAT') }}</div>
{% endif %}