H1 Underline {% include 'elements/headings/h1~underline' %}
#
HTML
<h1 class="center-text heading-underline">
    Lorem ipsum dolor sit amet consectetur
</h1>
Twig
<h1 class="{% if center %}center-text{% endif %} {% if underline %}heading-underline{% endif %}">{{title}}</h1>
{
    "title": "Lorem ipsum dolor sit amet consectetur",
    "underline": true,
    "center": true
}

Lorem ipsum dolor sit amet consectetur