Add Smooth Scrolling

Thanks to Joseph Silber https://stackoverflow.com/a/7717572

layouts/partials/footer.html

@@ -10,4 +10,13 @@
 <script src="{{ $highlight.Permalink }}" integrity="{{ $highlight.Data.Integrity }}"></script>
 <script>
     hljs.initHighlightingOnLoad();
+    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
+        anchor.addEventListener("click", function (e) {
+            e.preventDefault();
+
+            document.querySelector(this.getAttribute("href")).scrollIntoView({
+                behavior: "smooth"
+            });
+        });
+    });
 </script>