ux: add scroll position lock for default docs sidebar

1 files changed, 14 insertions, 0 deletions

diff --git a/assets/js/app.js b/assets/js/app.js
index e69de29..069b8c2 100644
--- a/assets/js/app.js
+++ b/assets/js/app.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);
+  });
+}