Issue #3486672 by lawxen: Create field enhancer text_processed

composer.json

+{
+    "name": "drupal/jsonapi_text_enhancer",
+    "description": "JSON:API Extras - Text Field Enhancer",
+    "type": "drupal-module",
+    "license": "GPL-2.0-or-later",
+    "require": {
+        "drupal/core": "^10.3 || ^11",
+        "drupal/jsonapi_extras": "*"
+    }
+}

src/Plugin/jsonapi/FieldEnhancer/TextEnhancer.php

+<?php
+
+namespace Drupal\Jsonapi_text_enhancer\Plugin\jsonapi\FieldEnhancer;
+
+use Drupal\jsonapi_extras\Plugin\ResourceFieldEnhancerBase;
+use Shaper\Util\Context;
+
+/**
+ * Perform additional manipulations to timestamp fields.
+ *
+ * @ResourceFieldEnhancer(
+ *   id = "text_processed",
+ *   label = @Translation("Text: Just output processed"),
+ *   description = @Translation("Text: Just output processed."),
+ * )
+ */
+class TextEnhancer extends ResourceFieldEnhancerBase
+{
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function doUndoTransform($data, Context $context)
+  {
+    if (is_array($data)) {
+      if (isset($data['value'])) {
+        unset($data['value']);
+      }
+      if (isset($data['format'])) {
+        unset($data['format']);
+      }
+    }
+    return $data;
+  }
+
+  public function getOutputJsonSchema()
+  {
+    return [
+      'type' => 'object',
+    ];
+  }
+
+  protected function doTransform($data, Context $context)
+  {
+    return $data;
+  }
+}