@govbr-ds/core/dist/components/button/examples/button-block.html

Padrão Digital de Governo

<div class="p-3">
  <button class="br-button block primary mb-3" type="button">Primário
  </button>
  <button class="br-button block secondary mb-3" type="button">Secundário
  </button>
  <button class="br-button block" type="button">Terciário
  </button>
</div>