{%- set containerClasses = [params.classes] if params.classes else [] -%}
{%- set classes = containerClasses | join(' ') -%}
<div class="tna-warning{% if classes %} {{ classes }}{% endif %}"{% for attribute, value in params.attributes %} {{ attribute }}{% if value !== '' %}="{{ value }}"{% endif %}{% endfor %}>
  <h{{ params.headingLevel }} class="tna-warning__heading">
    <span class="tna-visually-hidden">{{ params.heading or 'Important information' }}</span><span class="tna-warning__heading-icon" aria-hidden="true">!</span>
  </h{{ params.headingLevel }}>
  <div class="tna-warning__body">
    {{ params.body | safe }}
  </div>
</div>