From efeeba4743de5f34445255b7954fd8b852cca646 Mon Sep 17 00:00:00 2001
From: Adrian Rosin <adrian.rosin.etu@univ-lille.fr>
Date: Mon, 5 Feb 2024 14:25:54 +0100
Subject: [PATCH] feat: button disappear when scrolling down #16

---
 static/script-bon.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/static/script-bon.js b/static/script-bon.js
index 069bb06..d4da35f 100644
--- a/static/script-bon.js
+++ b/static/script-bon.js
@@ -116,3 +116,23 @@ function toggleAnimation() {
   }
 }
 
+let lastScrollTop = 0; // Last position of the scroll
+
+window.addEventListener("scroll", function() {
+  let currentPosition = window.pageYOffset || document.documentElement.scrollTop;
+  const toggleButton = document.querySelectorAll('.toggleButton');
+
+  if (currentPosition > lastScrollTop) {
+    // Scroll down
+    toggleButton.forEach(button => {
+      button.style.display = "none";
+    });
+  } else {
+    // Scroll up
+    toggleButton.forEach(button => {
+      button.style.display = "block";
+    });
+  }
+  lastScrollTop = currentPosition <= 0 ? 0 : currentPosition; // For Mobile or negative scrolling
+}, false);
+