nttdata_theme-1.0.x-dev/components/01-atoms/button/button.twig

{% if iconType %}
  <button {{ attributes.addClass(['button', buttonType|default('primary'), iconType]) }}>
      {{ text }}
  </button>
{% else %}
  <button {{ attributes.addClass(['button', buttonType|default('primary')]) }}>
      {{ text }}
  </button>
{% endif %}

    {# {{ source(componentMetadata.path ~ '/img/' ~ buttonType|default('Primary') ~ '.svg') }} #}