Render a Node or an Entity
On drupal 8 every elements (almost) are an entity, as any entity you can render a node.
On drupal 8 every elements (almost) are an entity, as any entity you can render a node.
Note : The tutorial is usins States VISIBLE, but can also use for other html parameters such as : REQUIRED, EXPENDED, CHECKED ...
The selector is an "JQUERY_SELECTOR"
Example.
Step 1 : Create field storage.\Drupal\field\Entity\FieldStorageConfig::create(array(
'field_name' => 'field_text',
'entity_type' => 'node',
'type' => 'text',
'cardinality' => -1,
))->save();