first commit

src/components/BackToTop.js

@@ -0,0 +1,19 @@
+import React, { useEffect } from 'react';
+import TopToBottom from '../lib/TopToBottom';
+
+function BackToTop({ className }) {
+    useEffect(() => {
+        TopToBottom('.back-to-top');
+    });
+    return (
+        <>
+            <div className={`back-to-top ${className}`}>
+                <a href="#">
+                    <i className="fal fa-arrow-up" />
+                </a>
+            </div>
+        </>
+    );
+}
+
+export default BackToTop;