From 6d842eefd0831c89f3be60e85dba91304fd3d00d Mon Sep 17 00:00:00 2001
From: Serghei Iakovlev <egrep@protonmail.ch>
Date: Sun, 24 Jul 2022 13:05:46 +0200
Subject: Provide 'Back to top' functionality

---
 assets/js/ed.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 assets/js/ed.js

(limited to 'assets/js')

diff --git a/assets/js/ed.js b/assets/js/ed.js
new file mode 100644
index 0000000..dbea865
--- /dev/null
+++ b/assets/js/ed.js
@@ -0,0 +1,14 @@
+document.addEventListener('DOMContentLoaded', function () {
+  // 'Back to top' logic
+  const intersectionObserver = new IntersectionObserver(function(entries) {
+    const topBtn = document.querySelector('.top-of-site-link');
+    if (topBtn === null) return;
+
+    topBtn.dataset.visible = entries[0].boundingClientRect.y < 0;
+  });
+
+  const topAnchor = document.querySelector('#top-of-site-anchor');
+  if (topAnchor !== null) {
+    intersectionObserver.observe(topAnchor);
+  }
+});
-- 
cgit v1.2.3