function Renderer::renderRoot

File

core/lib/Drupal/Core/Render/Renderer.php, line 100

Class

Renderer

Turns a render array into an HTML string.

Namespace

Code

public function renderRoot(&$elements) {
  if (!$elements) {
    return '';
  }
  // Disallow calling ::renderRoot() from within another ::renderRoot() call.
  if ($this->isRenderingRoot) {
    $this->isRenderingRoot = FALSE;
    throw new \LogicException('A stray renderRoot() invocation is causing bubbling of attached assets to break.');
  }
  // Render in its own render context.
  $this->isRenderingRoot = TRUE;
  try {
    $output = $this->renderInIsolation($elements);
  } finally {
    $this->isRenderingRoot = FALSE;
  }
  if ((string) $output === '') {
    return '';
  }
  return $elements['#markup'];
}