Prevent unmounted setState and remove listener on StickyBackToTop

src/components/StickyBackToTop.js

@@ -49,6 +49,7 @@ class StickyBackToTop extends PureComponent<Props, State> {
     const { scrollContainer } = this.props.getGrowScroll()
     if (scrollContainer) {
       const listener = () => {
+        if (this._unmounted) return
         const { scrollTop } = scrollContainer
         const visible = scrollTop > this.props.scrollThreshold
         this.setState(previous => {
@@ -59,11 +60,12 @@ class StickyBackToTop extends PureComponent<Props, State> {
         })
       }
       scrollContainer.addEventListener('scroll', listener)
-      this.releaseListener = () => scrollContainer.addEventListener('scroll', listener)
+      this.releaseListener = () => scrollContainer.removeEventListener('scroll', listener)
     }
   }
 
   componentWillUnmount() {
+    this._unmounted = true
     this.releaseListener()
   }