From 7aa203150fc1a2ec79c681c13f0d486d531746eb Mon Sep 17 00:00:00 2001
From: George Halkiadakis <gchalkiadakis@sklavenitis.co.gr>
Date: Sun, 12 Mar 2023 23:57:48 +0200
Subject: error pages; js system to support back/front-end

---
 html/assets/js/plugins/intersecting.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 html/assets/js/plugins/intersecting.js

(limited to 'html/assets/js/plugins/intersecting.js')

diff --git a/html/assets/js/plugins/intersecting.js b/html/assets/js/plugins/intersecting.js
new file mode 100644
index 0000000..87faf61
--- /dev/null
+++ b/html/assets/js/plugins/intersecting.js
@@ -0,0 +1,18 @@
+$$plugins.define('intersecting', function (element, options) {
+    const el = document.querySelector(options.target);
+
+    const observer = new window.IntersectionObserver(([entry]) => {
+        const intersectionRatio = entry.intersectionRatio.toFixed(2);
+        if (entry.isIntersecting) {
+            element.classList.add("sticky");
+        } else {
+            element.classList.remove("sticky");
+        }
+    }, {
+        root: null,
+        rootMargin: '-30% 0px -70%',
+        threshold: 0
+    })
+
+    observer.observe(el)
+});
-- 
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