Prepares variables for container templates.

Default template: container.html.twig.

Parameters

array $variables: An associative array containing:

• element: An associative array containing the properties of the element. Properties used: #id, #attributes, #children.

File

core/lib/Drupal/Core/Theme/ThemePreprocess.php, line 48

Class

ThemePreprocess

Preprocess for common/core theme templates.

Namespace

Drupal\Core\Theme

Code

public function preprocessContainer(array &$variables) : void {
  $variables['has_parent'] = FALSE;
  $element = $variables['element'];
  // Ensure #attributes is set.
  $element += [
    '#attributes' => [],
  ];
  // Special handling for form elements.
  if (isset($element['#array_parents'])) {
    // Assign an html ID.
    if (!isset($element['#attributes']['id'])) {
      $element['#attributes']['id'] = $element['#id'];
    }
    $variables['has_parent'] = TRUE;
  }
  $variables['children'] = $element['#children'];
  $variables['attributes'] = $element['#attributes'];
}

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