fix: scrollToTop

Author: Simon he

src/scrollToTop.ts

@@ -6,7 +6,7 @@ export function scrollToTop() {
       const t = document.documentElement.scrollTop || document.body.scrollTop
       if (pre === undefined)
         pre = t
-      if ((pre < t && t < pre * 8 / 7) || t === 0)
+      if ((pre < t && (pre * 8) / 7 !== t) || t === 0)
         stop()
       window.scrollTo(0, pre = 7 * t / 8)
     }, 0)