By gábor hojtsy on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
8.x
Introduced in version: 
8.0
Issue links: 
https://www.drupal.org/node/1968360
Description: 

In Drupal 7 it was possible to specify separate block templates per region, such as block--header.tpl.php and block--footer.php to output different HTML for blocks placed in the header and footer regions. It was also possible to adjust variables based on region in hook_preprocess_block(). Both of these features have been removed.

It is suggested you use standard CSS cascading selectors to style blocks differently on different parts of the page.

Impacts: 
Themers

Comments

Benia’s picture

Benia commented

If I use CSS to hide #sidebar, in whatever theme, a wide blank block is created instead; The sidebar region keeps staying, but just as an empty and blank "box".

allan00958’s picture

allan00958 commented

I don't know if you found the answer already but maybe try this in your page.html.twig:

<div class="someClass">
    <div class="row">
        {% if page.sidebar %}
            <div class="col-12">
               {{ page.sidebar}}
            </div>   
        {% endif %}
    </div>
</div>

Maybe add an if statement and hide the sidebar using a preprocess function.

a.milkovsky’s picture

a.milkovsky
he/him
Location UTC +2
commented

How to make a theme hook suggestion for blocks according to region?

use Drupal\block\Entity\Block;

function MODULE_theme_suggestions_block_alter(array &$suggestions, array $variables) {
  if (!empty($variables['elements']['#id'])) {
    $block = Block::load($variables['elements']['#id']);
    $suggestions[] = 'block__' . $block->getRegion() . '__' . $variables['elements']['#id'];
  }
  /* Use this 'else if' only if you are using page_manager module and want to know which region is the block */
  else if (isset($variables['elements']['#configuration']['region'])) {
    $suggestions[] = 'block__page_' . $variables['elements']['#configuration']['region'] . '__' . end(explode(':', $variables['elements']['#plugin_id']));
  }
  return $suggestions;
}