I've created a custom controller that pulls content from another node (the body). That content is defined in the node as Raw HTML.

 public function page(Request $request): array { $nid = $request->attributes->get('_nid'); $node_storage = $this->entityTypeManager()->getStorage('node'); $node = $node_storage->load($nid); $content = $node->get('field_content')->value; // Load Entity using passed NID from key. $build = $content; // Return new Response($build); $render_array['snippet'] = [ '#theme' => 'webpart_snippet', '#content' => $build, '#prefix' => '<div class="webpart_outer_wrapper">', '#suffix' => '</div>', ]; return $render_array; } 

I would like to render that content as if it were a native Symfony response. (e.g., correctly parse and HTML tags AND scripts)

In the node that I'm pulling in, I have, for example

<h1>This is text</h1> 

and that is exactly what is showing on the page

It should be

This is text

I have defined a custom theme as well as twig template

/** * Implements hook_theme(). * Declare a new theme */ function custom_webpart_snippet_theme() { return [ 'webpart_snippet' => [ 'variables' => [ 'content' => '', ], ], ]; }