CHANGE use scrolllistener only when site is 1.5 times the screen size

static/js/scroll.js

@@ -1,4 +1,6 @@
-window.addEventListener("scroll", () => {
+window.onload = (event) => {
+  if ((document.documentElement.scrollHeight / window.screen.availHeight ) > 1.5) {
+    window.addEventListener("scroll", () => {
       var winScroll = document.body.scrollTop || document.documentElement.scrollTop;
       var height = document.documentElement.scrollHeight - document.documentElement.clientHeight;
       var scrolled = (winScroll / height) * 100;
@@ -9,4 +11,6 @@ window.addEventListener("scroll", () => {
       if ((window.scrollY > 0 && !toTop.classList.contains("show")) || (window.scrollY <= 0 && toTop.classList.contains("show"))) {
         toTop.classList.toggle("show");
       }
-});
+    });
+  }
+}