Refactor code structure and remove redundant changes

prod/assets/js/scrollUp.js

@@ -0,0 +1,19 @@
+const scrollUp = () => {
+  const scrollUpElement = document.querySelector(".scroll-up");
+  if (scrollUpElement) {
+    scrollUpElement.addEventListener("click", () => {
+      window.scroll({ top: 0, left: 0, behavior: "smooth" });
+    });
+
+    window.addEventListener("scroll", () => {
+      const scrollCount = window.scrollY;
+
+      if (scrollCount < 300) {
+        scrollUpElement.classList.remove("active");
+      }
+      if (scrollCount > 300) {
+        scrollUpElement.classList.add("active");
+      }
+    });
+  }
+};