widget_attributes

{%- block widget_attributes -%}
    id="{{ id }}" name="{{ full_name }}"
    {%- if read_only %} readonly="readonly"{% endif -%}
    {%- if disabled %} data-disabled="disabled"{% endif -%}
    {%- if required %} required="required"{% endif -%}
    {%- for attrname, attrvalue in attr -%}
        {{- " " -}}
        {%- if attrname in ['placeholder', 'title'] -%}
            {{- attrname }}="{{ attrvalue|trans({}, translation_domain) }}"
        {%- elseif attrvalue is sameas(true) -%}
            {{- attrname }}="{{ attrname }}"
        {%- elseif attrvalue is not sameas(false) -%}
            {{- attrname }}="{{ attrvalue }}"
        {%- endif -%}
    {%- endfor -%}
{%- endblock widget_attributes -%}