{%- if value is empty -%}
     
{%- elseif field_description.options.as_string is defined and field_description.options.as_string -%}
    {{ value }}
{%- else -%}
    {% set parameters = {} %}
    {% set subject = field_description.options.subject|default('') %}
    {% set body = field_description.options.body|default('') %}

    {% if subject is not empty %}
        {% set parameters = parameters|merge({'subject': subject}) %}
    {% endif %}
    {% if body is not empty %}
        {% set parameters = parameters|merge({'body': body}) %}
    {% endif %}

    <a href="mailto:{{ value }}{% if parameters|length > 0 %}?{{- parameters|url_encode -}}{% endif %}">
        {{- value -}}
    </a>
{%- endif -%}