doc/themes/quark/templates/forms/fields/checkbox/checkbox.html.twig

{% extends "forms/field.html.twig" %}

{% block label %}
{% endblock %}

{% block input %}
    {% set id = field.id|default(field.name) ~ '-' ~ key %}
    <div class="{{ form_field_wrapper_classes ?: 'form-input-wrapper' }} {{ field.size }} {{ field.wrapper_classes }}">
        <label class="{{ form_field_checkbox_classes }}" for="{{ id|e }}">
        <input
            {# required attribute structures #}
            name="{{ (scope ~ field.name)|fieldName }}"
            value="{{ value|join(', ') }}"
            type="checkbox"
            {% if value == true %} checked="checked" {% endif %}

            {# input attribute structures #}
            {% block input_attributes %}
                id="{{ id|e }}"
                {% if field.classes is defined %}class="{{ field.classes }}" {% endif %}
                {% if field.style is defined %}style="{{ field.style|e }}" {% endif %}
                {% if field.disabled or isDisabledToggleable %}disabled="disabled"{% endif %}
                {% if field.autofocus in ['on', 'true', 1] %}autofocus="autofocus"{% endif %}
                {% if field.novalidate in ['on', 'true', 1] %}novalidate="novalidate"{% endif %}
                {% if required %}required="required"{% endif %}
            {% endblock %}
            />
            <i class="form-icon"></i>
            {{ field.label|t|e }} {{ field.validate.required in ['on', 'true', 1] ? '<span class="required">*</span>' }}
        </label>
    </div>
{% endblock %}