sample files from a smithsonian project

templates/block/block--facet-block.html.twig

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+{% if content.0['#items'] is not null %}
+  {% include "@components/facets/facet-group.twig" with {
+    facet_group_title: label,
+    facet_group_items: content
+  }%}
+{% endif %}

templates/block/block--filterbycontenttype.html.twig

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+{% include '@components/horizontal-facets/horizontal-facets.twig' with {
+  facets: content.0['#items']
+}%}

templates/block/block--mainnavigation.html.twig

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+{#
+/**
+ * @file
+ * Theme override for a menu 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: HTML attributes for the containing element.
+ *   - id: A valid HTML ID and guaranteed unique.
+ * - title_attributes: HTML attributes for the title element.
+ * - content_attributes: HTML attributes for the content element.
+ * - 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.
+ *
+ * Headings should be used on navigation menus that consistently appear on
+ * multiple pages. When this menu block's label is configured to not be
+ * displayed, it is automatically made invisible using the 'visually-hidden' CSS
+ * class, which still keeps it visible for screen-readers and assistive
+ * technology. Headings allow screen-reader and keyboard only users to navigate
+ * to or skip the links.
+ * See http://juicystudio.com/article/screen-readers-display-none.php and
+ * http://www.w3.org/TR/WCAG-TECHS/H42.html for more information.
+ */
+#}
+
+{# Label. If not displayed, we still provide it for screen readers. #}
+{% if not configuration.label_display %}
+  {% set title_attributes = title_attributes.addClass('visually-hidden') %}
+{% endif %}
+{{ title_prefix }}
+{% include "@elements/text/headings/_heading.twig" with {
+  "heading_level": 2,
+  "heading": label,
+} %}
+{{ title_suffix }}
+
+{# Menu. #}
+{% block content %}
+  {{ content }}
+{% endblock %}

templates/block/block--submenu.html.twig

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+{% include "@components/subnav/subnav.twig" with {
+  subnav_title: label,
+  subnav_menu: content,
+  header_id: 'subnav-header-' ~ attributes.id,
+}%}

templates/block/block--views-exposed-filter-block.html.twig

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+
+{{ content }}

templates/block/block.html.twig

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+{#
+/**
+ * @file
+ * Theme override 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()
+ */
+#}
+<div {{ bem('block') }}>
+  {{ title_prefix }}
+  {% if label %}
+    <h2{{ title_attributes.addClass('h2') }}>{{ label }}</h2>
+  {% endif %}
+  {{ title_suffix }}
+  {% block content %}
+    {{ content }}
+  {% endblock %}
+</div>