A new and improved field template

field.html.twig

{%
  set classes = [
    'field',
    'field--name-' ~ field_name|clean_class,
    'field--type-' ~ field_type|clean_class,
    'field--label-' ~ label_display,
  ]
%}
{%
  set title_classes = [
    'field__label',
    label_display == 'visually_hidden' ? 'visually-hidden',
  ]
%}

{% block field %}
  <div{{ attributes.addClass(classes) }}>
    {% block label %}
      {% if label and not label_hidden %}
        <div{{ title_attributes.addClass(title_classes) }}>{{ label }}</div>
      {% endif %}
    {% endblock %}
    {% block content %}
      {% if multiple %}
        <div class="field__items">
          {% block items %}
            {% for item in items %}
              <div{{ item.attributes.addClass('field__item') }}>{{ item.content }}</div>
            {% endfor %}
          {% endblock %}
        </div>
      {% else %}
        {{ block('items') }}
      {% endif %}
    {% endblock %}
  </div>
{% endblock %}