30.04.2026 | Pascal Crott

Prevent empty views blocks from getting rendered even if they are empty.

Issue: https://www.drupal.org/project/drupal/issues/953034

my_module.module
<?php

use Drupal\views\Plugin\Block\ViewsBlock;

/**
 * Implements hook_block_alter().
 */
function hook_block_alter(array &$definitions) {
  foreach ($definitions as $block_id => &$block_definition) {
    if ($block_definition['class'] === ViewsBlock::class) {
      $block_definition['class'] = 'Drupal\my_module\Plugin\Block\ViewsBlock';
    }
  }
}

ViewsBlock.php
<?php

namespace Drupal\my_module\Plugin\Block;

use Drupal\views\Plugin\Block\ViewsBlock as ViewsBlockCore;

/**
 * Replaces the generic Views block.
 */
class ViewsBlock extends ViewsBlockCore {

  /**
   * {@inheritdoc}
   */
  public function build() {
    if (empty($this->view->result) && empty($this->view->empty)) {
      // Without caching.
      // return ['#cache' => ['max-age' => 0]];
      // With hard caching.
      return [];
    }

    return parent::build();
  }

}

Issue:

Sometimes blocks are rendered even when they are empty and even if the setting in views is activated that they should not be rendered when empty. This might be the case in combination i.e. with lazy loading. If an empty block is rendered, this may have impact on  the layout because the empty block might still have margins or paddings

Solution:

This snippet replaces the generic Views block and checks "manually" whether or not the block is empty.

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