Initial

Gutenberg/gutenberg-on-admin-page/admin-page.php

@@ -0,0 +1,37 @@
+function my_custom_admin_page() {
+    add_menu_page(
+        'Custom Page with Gutenberg Editor',
+        'Custom Page',
+        'manage_options',
+        'my-custom-page',
+        'my_custom_page_callback',
+        'dashicons-edit',
+        20
+    );
+}
+add_action('admin_menu', 'my_custom_admin_page');
+
+function my_custom_page_callback() {
+    ?>
+    <div id="my-custom-editor"></div>
+    <script type="text/javascript">
+        (function() {
+            var el = document.getElementById('my-custom-editor');
+            wp.blocks.getBlockTypes();
+            wp.element.render(
+                wp.element.createElement(
+                    wp.blockEditor.BlockEditorProvider,
+                    {},
+                    wp.element.createElement(
+                        wp.blockEditor.BlockList,
+                        {
+                            blocks: wp.data.select('core/block-editor').getBlocks()
+                        }
+                    )
+                ),
+                el
+            );
+        })();
+    </script>
+    <?php
+}