♻️ remove jquery

Author: ShubhamOulkar

_includes/head.html

@@ -65,7 +65,6 @@
     {% else %}
     <meta property="twitter:image" content="https://expressjs.com/images/og.png">
     {% endif %}
-    <script data-cfasync="false" src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
     <script data-cfasync="false" src="/js/app.js"></script>
     <script data-cfasync="false" defer src="/js/menu.js"></script>
     <script data-cfasync="false" defer src="/js/copycode.js"></script>

js/app.js

@@ -47,7 +47,9 @@ document.addEventListener("DOMContentLoaded", function () {
   const menuLinks = document.querySelectorAll("#menu li a");
 
   const observerOptions = {
-    rootMargin: "-200px 0px 0px 0px",
+    root: null,
+    rootMargin: "-25% 0px -50px 0px",
+    threshold: 1,
   };
 
   const menuObserver = new IntersectionObserver((entries) => {