<div id="{{ field.id }}"
     class="field-list {% if error | is_str %}is-invalid{% endif %}">
    <input id="{{ field.id }}-next-index"
           value="{{ (data or []) | length +1 }}"
           hidden>
    <div class="template d-none">
        {% filter forceescape %}
            <div class="mb-3 field-list-item">
                <div class="d-flex">
                    <div class="flex-grow-1">
                        {% with data=None, error=False, field=field._field_at(None) %}
                      