1 files changed, 14 insertions, 0 deletions
diff --git a/code/frontpage/assets/js/scroll-lock.js b/code/frontpage/assets/js/scroll-lock.js
new file mode 100644
index 0000000..069b8c2
--- /dev/null
+++ b/code/frontpage/assets/js/scroll-lock.js
@@ -0,0 +1,14 @@
+// Adds scroll position lock for default docs sidebar
+
+if (document.querySelector('#sidebar-default') !== null) {
+  let sidebar = document.getElementById('sidebar-default');
+
+  let pos = sessionStorage.getItem('sidebar-scroll');
+  if (pos !== null) {
+      sidebar.scrollTop = parseInt(pos, 10);
+  }
+
+  window.addEventListener('beforeunload', () => {
+      sessionStorage.setItem('sidebar-scroll', sidebar.scrollTop);
+  });
+}