GraphiQL in Backend

controllers/Playground.php

@@ -0,0 +1,18 @@
+<?php namespace GermanAirlinesVa\Graphql\Controllers;
+
+use Backend\Classes\Controller;
+use BackendMenu;
+
+class Playground extends Controller
+{
+  public function __construct()
+  {
+    parent::__construct();
+
+    BackendMenu::setContext('GermanAirlinesVa.Graphql', 'menu', 'playground');
+  }
+
+  public function index()
+  {
+  }
+}

controllers/playground/index.htm

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+<div id="mount"></div>
+<script type="text/javascript" src="/plugins/germanairlinesva/graphql/assets/js/graphiql.js"></script>