{% spaceless %}
<div class="{% if widget.vertical %}btn-group-vertical{% else %}btn-group{% endif %} w-100{% if widget.has_error %} is-invalid{% endif %}" role="group">
  {% for group, options, group_index in widget.optgroups %}
    {% for option in options %}
      <input
        type="{% if widget.multiple %}checkbox{% else %}radio{% endif %}"
        name="{{ widget.name }}"
        value="{{ option.value }}"
        id="id_{{ widget.name }}_{{ option.index }}"
        class="{{ option.attrs.class }}"
        autocomplete="off"
        {% if option.selected %}checked{% endif %}
      >
      <label for="id_{{ widget.name }}_{{ option.index }}" class="btn"{% if option.title %} title="{{ option.title }}"{% endif %}>
        {{ option.label }}
      </label>
    {% endfor %}
  {% endfor %}
</div>
{% endspaceless %}