docs: use classList.replace

Author: DylanVann

packages/docs/index.js

@@ -124,18 +124,14 @@ window.addEventListener(
   () => {
     if (window.scrollY > 200) {
       if (!showingFloatingButton) {
-        floatingButtonEl.classList.remove('opacity-0')
-        floatingButtonEl.classList.add('opacity-100')
-        topBarEl.classList.remove('pointer-events-none')
-        topBarEl.classList.add('pointer-events-auto')
+        floatingButtonEl.classList.replace('opacity-0', 'opacity-100')
+        topBarEl.classList.replace('pointer-events-none', 'pointer-events-auto')
         showingFloatingButton = true
       }
     } else {
       if (showingFloatingButton) {
-        floatingButtonEl.classList.add('opacity-0')
-        floatingButtonEl.classList.remove('opacity-100')
-        topBarEl.classList.add('pointer-events-none')
-        topBarEl.classList.remove('pointer-events-auto')
+        floatingButtonEl.classList.replace('opacity-100', 'opacity-0')
+        topBarEl.classList.replace('pointer-events-auto', 'pointer-events-none')
         showingFloatingButton = false
       }
     }