Show JSON API representation of node only on default and full view mode

contenta_jsonapi-json_render_only_full_view_mode.patch

diff --git a/modules/contenta_enhancements/contenta_enhancements.module b/modules/contenta_enhancements/contenta_enhancements.module
index d1b9951..8f0364b 100644
--- a/modules/contenta_enhancements/contenta_enhancements.module
+++ b/modules/contenta_enhancements/contenta_enhancements.module
@@ -362,7 +362,7 @@ function contenta_enhancements_toolbar_alter(&$items) {
 function contenta_enhancements_node_view_alter(array &$build, NodeInterface $entity, EntityViewDisplayInterface $display) {
   // Make sure the help pages are left alone.
   // TODO: Use the concept of view modes to solve this problem, not this hack.
-  if ($entity->bundle() === 'page') {
+  if ($entity->bundle() === 'page' || ($display->getMode() !== 'default' && $display->getMode() !== 'full')) {
     return;
   }
   // Retrieve JSON API representation of this node.