{% macro formfield(field, placeholder) %}
    <div class="mb-3">
        {{ field.label (class="form-label") }}
        {% if field.errors %}
            {% if placeholder %}
                {{ field (class="form-control is-invalid", placeholder=placeholder) }}
            {% else %}
                {{ field (class="form-control is-invalid") }}
            {% endif %}
            <div class="invalid-feedback">
                {% for error in field.errors %}
                    <span>{{ error }}</span>
                {% endfor %}
            </div>
        {% else %}
            {% if placeholder %}
                {{ field (class="form-control", placeholder=placeholder) }}
            {% else %}
                {{ field (class="form-control") }}
            {% endif %}
        {% endif %}
    </div>
{% endmacro %}