Starter主题滚动按钮bug

themes/starter/components/BackToTopButton.js

@@ -7,40 +7,12 @@ import { useCallback, useEffect } from 'react'
  */
 export const BackToTopButton = () => {
   useEffect(() => {
-    // ====== scroll top js
-    function scrollTo(element, to = 0, duration = 500) {
-      const start = element.scrollTop
-      const change = to - start
-      const increment = 20
-      let currentTime = 0
-
-      const animateScroll = () => {
-        currentTime += increment
-
-        const val = Math.easeInOutQuad(currentTime, start, change, duration)
-
-        element.scrollTop = val
-
-        if (currentTime < duration) {
-          setTimeout(animateScroll, increment)
-        }
-      }
-
-      animateScroll()
-    }
-
     Math.easeInOutQuad = function (t, b, c, d) {
       t /= d / 2
       if (t < 1) return (c / 2) * t * t + b
       t--
       return (-c / 2) * (t * (t - 2) - 1) + b
     }
-    const backToTop = document.querySelector('.back-to-top')
-    if (backToTop) {
-      backToTop.onclick = () => {
-        scrollTo(document.documentElement)
-      }
-    }
 
     window.addEventListener('scroll', navBarScollListener)
     return () => {
@@ -61,10 +33,40 @@ export const BackToTopButton = () => {
     }, throttleMs)
   )
 
+  // ====== scroll top js
+  function scrollTo(element, to = 0, duration = 500) {
+    const start = element.scrollTop
+    const change = to - start
+    const increment = 20
+    let currentTime = 0
+
+    const animateScroll = () => {
+      currentTime += increment
+
+      const val = Math.easeInOutQuad(currentTime, start, change, duration)
+
+      element.scrollTop = val
+
+      if (currentTime < duration) {
+        setTimeout(animateScroll, increment)
+      }
+    }
+
+    animateScroll()
+  }
+
+  function scrollTop() {
+    if (document) {
+      scrollTo(document.documentElement)
+    }
+  }
+
   return (
     <>
       {/* <!-- ====== Back To Top Start --> */}
-      <a className='back-to-top fixed bottom-16 left-auto right-8 z-[999] hidden h-10 w-10 items-center justify-center rounded-md bg-primary text-white shadow-md transition duration-300 ease-in-out hover:bg-dark'>
+      <a
+        onClick={scrollTop}
+        className='back-to-top cursor-pointer fixed bottom-16 left-auto right-8 z-[999] hidden h-10 w-10 items-center justify-center rounded-md bg-primary text-white shadow-md transition duration-300 ease-in-out hover:bg-dark'>
         <span className='mt-[6px] h-3 w-3 rotate-45 border-l border-t border-white'></span>
       </a>
       {/* <!-- ====== Back To Top End --> */}