ugly

web/components/scroll-to-top-button.tsx

@@ -0,0 +1,39 @@
+import { ArrowCircleUpIcon } from '@heroicons/react/solid'
+import clsx from 'clsx'
+import { useEffect, useState } from 'react'
+import { Button } from './button'
+
+export function ScrollToTopButton(props: { className?: string }) {
+  const { className } = props
+  const [visible, setVisible] = useState(false)
+
+  useEffect(() => {
+    window.addEventListener('scroll', () => {
+      if (window.scrollY > 400) {
+        console.log('button commence')
+        setVisible(true)
+      } else {
+        setVisible(false)
+      }
+    })
+  }, [])
+
+  const scrollToTop = () => {
+    window.scrollTo({
+      top: 0,
+      behavior: 'smooth',
+    })
+  }
+
+  return (
+    <button
+      className={clsx(
+        'border-5 h-14 w-14 border border-yellow-400 bg-green-400',
+        visible ? 'inline' : 'hidden',
+        className
+      )}
+    >
+      <ArrowCircleUpIcon onClick={scrollToTop} />
+    </button>
+  )
+}