drupal/core/modules/system/templates/field.html.twig

{#
/**
 * @file
 * Default theme implementation for a field.
 *
 * To override output, copy the "field.html.twig" from the templates directory
 * to your theme's directory and customize it, just like customizing other
 * Drupal templates such as page.html.twig or node.html.twig.
 *
 * For example, for a field named 'body' displayed on the 'article' content
 * type, any of the following templates will override this default
 * implementation. The first of these templates that exists is used:
 * - field--body--article.html.twig
 * - field--article.html.twig
 * - field--body.html.twig
 * - field.html.twig
 *
 * Available variables:
 * - attributes: HTML attributes for the containing element.
 * - label_hidden: Whether to show the field label or not.
 * - title_attributes: HTML attributes for the title.
 * - label: The label for the field.
 * - content_attributes: HTML attributes for the content.
 * - items: List of all the field items. Each item contains:
 *   - attributes: List of HTML attributes for each item.
 *   - content: The field item's content.
 *
 * @see template_preprocess_field()
 *
 * @ingroup themeable
 */
#}
<div{{ attributes }}>
  {% if not label_hidden %}
    <div{{ title_attributes.addClass('field-label') }}>{{ label }}</div>
  {% endif %}
  <div{{ content_attributes.addClass('field-items') }}>
    {% for item in items %}
      <div{{ item.attributes.addClass('field-item') }}>{{ item.content }}</div>
    {% endfor %}
  </div>
</div>