update scroll behavior so that sidebar maintains location

docs/_static/custom.js

@@ -9,3 +9,59 @@ window.addEventListener("DOMContentLoaded", function() {
         link.setAttribute("target", "_blank");
     });
 });
+
+// This function was adapted from pydata-sphinx-theme
+// https://github.com/pydata/pydata-sphinx-theme/blob/733d9f3264020c8a5bd3dde38f3ee3e5cdb2979a/src/pydata_sphinx_theme/assets/scripts/pydata-sphinx-theme.js#L133-L175
+function scrollToActive() {
+    // If the docs nav doesn't exist, do nothing (e.g., on search page)
+    if (!document.querySelector(".sidebar-scroll")) {
+      return;
+    }
+
+    var sidebar = document.querySelector("div.sidebar-scroll");
+
+    // Remember the sidebar scroll position between page loads
+    // Inspired on source of revealjs.com
+    let storedScrollTop = parseInt(
+      sessionStorage.getItem("sidebar-scroll-top"),
+      10
+    );
+
+    if (!isNaN(storedScrollTop)) {
+      // If we've got a saved scroll position, just use that
+      sidebar.scrollTop = storedScrollTop;
+      console.log("Scrolled sidebar using stored browser position...");
+    } else {
+      // Otherwise, calculate a position to scroll to based on the lowest `active` link
+      var sidebarNav = document.querySelector(".sidebar-scroll");
+      var active_pages = sidebarNav.querySelectorAll(".current-page");
+      if (active_pages.length > 0) {
+        // Use the last active page as the offset since it's the page we're on
+        var latest_active = active_pages[active_pages.length - 1];
+        var offset =
+          latest_active.getBoundingClientRect().y -
+          sidebar.getBoundingClientRect().y;
+        // Only scroll the navbar if the active link is lower than 50% of the page
+        if (latest_active.getBoundingClientRect().y > window.innerHeight * 0.5) {
+          let buffer = 0.25; // Buffer so we have some space above the scrolled item
+          sidebar.scrollTop = offset - sidebar.clientHeight * buffer;
+          console.log("Scrolled sidebar using last active link...");
+        }
+      }
+    }
+
+    setTimeout(function() {
+      // sidebar is hidden by default, so we need to make it visible
+      // after scrolling. This prevents the scrollbar from jittering when
+      // the page loads.
+      console.log("Sidebar is now visible...")
+      sidebar.style.visibility = "visible";
+    }, 10);
+
+    // Store the sidebar scroll position
+    window.addEventListener("beforeunload", () => {
+      sessionStorage.setItem("sidebar-scroll-top", sidebar.scrollTop);
+    });
+  }
+
+document.addEventListener('DOMContentLoaded', scrollToActive);

docs/_static/flyte.css

@@ -10,6 +10,7 @@ h6 {
 
 .sidebar-scroll {
   scroll-behavior: auto;
+  visibility: hidden;
 }
 
 .sidebar-tree ul:first-child li:not(:last-child) {