templating-8.x-2.0/templates/misc/block.html.twig

{#
/**
 * @file
 * Default theme implementation to display a block.
 *
 * Available variables:
 * - plugin_id: The ID of the block implementation.
 * - label: The configured label of the block if visible.
 * - configuration: A list of the block's configuration values.
 *   - label: The configured label for the block.
 *   - label_display: The display settings for the label.
 *   - provider: The module or other provider that provided this block plugin.
 *   - Block plugin specific settings will also be stored here.
 * - content: The content of this block.
 * - attributes: array of HTML attributes populated by modules, intended to
 *   be added to the main container tag of this template.
 *   - id: A valid HTML ID and guaranteed unique.
 * - title_attributes: Same as attributes, except applied to the main title
 *   tag that appears in the template.
 * - title_prefix: Additional output populated by modules, intended to be
 *   displayed in front of the main title tag that appears in the template.
 * - title_suffix: Additional output populated by modules, intended to be
 *   displayed after the main title tag that appears in the template.
 *
 * @see template_preprocess_block()
 *
 * @ingroup themeable
 */
#}
{%
  set classes = [
    'block',
    'block-' ~ configuration.provider|clean_class,
    'block-' ~ plugin_id|clean_class
  ]
%}
  <div{{ attributes.addClass(classes) }}>
    {{ title_prefix }}
    {% if label %}
      <h2{{ title_attributes }}>{{ label }}</h2>
    {% endif %}
    {{ title_suffix }}
    {% block content %}

      <div{{ content_attributes.addClass('content') }}>
            
            {% set output = render_template_block(content) %}           
            {% if output %}
                 {{output}}
            {% else %}  
                {% if content.content %}
                    {% set content  = content.content %}
                {% endif %} 
                {{spacer_top(content)|raw}}{% block templating_content %}{{content}}{% endblock %}{{spacer_bottom(content)|raw}}             
            {% endif %}  
      </div>
    {% endblock %}
  </div>