update

web/themes/custom/popsu_colloque/popsu_colloque.info.yml

@@ -8,3 +8,12 @@ base theme: false
 libraries:
   - popsu_colloque/global-styling
   - popsu_colloque/global-scripts
+
+regions:
+  header: Header
+  primary_menu: 'Primary menu'
+  highlighted: Highlighted
+  content: Content
+  sidebar_first: 'Sidebar first'
+  sidebar_second: 'Sidebar second'
+  footer: 'Footer'

web/themes/custom/popsu_colloque/template/regions/region--header.html.twig

@@ -0,0 +1,21 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a region.
+ *
+ * Available variables:
+ * - content: The content for this region, typically blocks.
+ * - attributes: HTML attributes for the region <div>.
+ * - region: The name of the region variable as defined in the theme's
+ *   .info.yml file.
+ *
+ * @see template_preprocess_region()
+ *
+ * @ingroup themeable
+ */
+#}
+{% if content %}
+  <div{{ attributes }}>
+    {{ content }}
+  </div>
+{% endif %}

web/themes/custom/popsu_colloque/template/regions/region.html.twig

@@ -0,0 +1,21 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a region.
+ *
+ * Available variables:
+ * - content: The content for this region, typically blocks.
+ * - attributes: HTML attributes for the region <div>.
+ * - region: The name of the region variable as defined in the theme's
+ *   .info.yml file.
+ *
+ * @see template_preprocess_region()
+ *
+ * @ingroup themeable
+ */
+#}
+{% if content %}
+  <div{{ attributes }}>
+    {{ content }}
+  </div>
+{% endif %}