🔀 Merge pull request #806 from Jh123x/fix/772/set-to-top-elem-on-scrollable-height

feat: add js to check height and decide if to top is required

assets/js/appearance.js

@@ -38,7 +38,29 @@ if (document.documentElement.getAttribute("data-auto-appearance") === "true") {
   });
 }
 
+function add_to_top_elem() {
+  var body = document.body;
+  var html = document.documentElement;
+
+  const height =
+    Math.max(
+      body.scrollHeight,
+      body.offsetHeight,
+      html.clientHeight,
+      html.scrollHeight,
+      html.offsetHeight
+    ) - 150;
+
+  const elem = document.getElementById("to-top");
+  if (elem === null || elem === undefined) {
+    return;
+  }
+
+  elem.hidden = height < window.innerHeight;
+}
+
 window.addEventListener("DOMContentLoaded", (event) => {
+  add_to_top_elem();
   setThemeColor();
   var switchers = document.querySelectorAll("[id^='appearance-switcher']");
   switchers.forEach((switcher) => {