How to use menu_get_object()?

Question

I was using menu_get_object() to load node information in Drupal 6.

if ($node = menu_get_object()) {
    // Get the nid
    $nid = $node->nid;
  }

Since menu_get_object() is deprecated in Drupal 8, I was using the following code.

if ($node_id = \Drupal::request()->attributes->get('node')) { #menu_get_object()   
    //load all the information of the node
    $node = node_load($node_id);
  }
  echo '<pre>';print_r($node);exit();echo '</pre>'; //its okay
  echo $node->type->value; //not working

This is not getting the node values, but printing the node information's in array. How do I resolve this ?

UPDATE

I am getting all other values like $node->title->value and $node->nid->value, but not $node->type->value.

Answer 1

See https://drupal.stackexchange.com/a/202185/45409

In Drupal 8, you can get url arguments based on what's in the routing.

To get the id alone:

$nid = \Drupal::routeMatch()->getRawParameter('node');

If you plan to load the node object, you can simply get it this way:

$node = \Drupal::routeMatch()->getParameter('node');

To find the parameter names, you can use:

$possible_parameters = \Drupal::routeMatch()->getParameters();

To find the node type, use:

$node->bundle();

Answer 2

\Drupal::request()->attributes->get('node') will return the node object, not the node id.

if ($node = \Drupal::request()->attributes->get('node')) {   
  kint($node);
  echo $node->getType();    
}

Answer 3

If you compare what Drupal 7 does in template_preprocess_page() with what Drupal 8 does in the same function, you will see that the first function uses the following code.

  if ($node = menu_get_object()) {
    $variables['node'] = $node;
  }

The second function uses the following code.

  if ($node = \Drupal::routeMatch()->getParameter('node')) {
    $variables['node'] = $node;
  }

page.html.twig descrives node as follows:

node: Fully loaded node, if there is an automatically-loaded node associated with the page and the node ID is the second argument in the page's path (e.g. node/12345 and node/12345/revisions, but not comment/reply/12345).

Also, node_load() should be replaced with the following code.

use \Drupal\node\Entity\Node;

$node = Node::load($nid);

You don't need Node::load() since $variables['node'] already contains a full-loaded node object.