Added scroll to top button

src/core/components/app.jsx

@@ -3,6 +3,7 @@
  */
 import React from "react"
 import PropTypes from "prop-types"
+import ScrollToTopButton from "./scroll-to-top"
 
 class App extends React.Component {
   getLayout() {
@@ -18,7 +19,12 @@ class App extends React.Component {
   render() {
     const Layout = this.getLayout()
 
-    return <Layout />
+    return (
+      <>
+      <ScrollToTopButton />
+      <Layout />
+      </>
+    )
   }
 }
 

src/core/components/scroll-to-top.jsx

@@ -0,0 +1,85 @@
+import React, { useState, useEffect } from "react"
+
+const ScrollToTopButton = () => {
+  const [isVisible, setIsVisible] = useState(false)
+  const [hideTimeout, setHideTimeout] = useState(null) 
+
+  const styles = {
+    button: {
+      position: "fixed",
+      bottom: "20px",
+      right: "20px",
+      padding: "10px 20px",
+      fontSize: "18px",
+      backgroundColor: "rgba(125, 132, 146, 0.8)",
+      color: "#fff",
+      border: "2px solid rgba(125, 132, 146, 0.8)",
+      borderRadius: "5px",
+      cursor: "pointer",
+      boxShadow: "0px 4px 6px rgba(0, 0, 0, 0.1), 0 0 15px rgba(125, 132, 146, 0.6)",
+      transition: "opacity 0.5s ease, box-shadow 0.3s ease",
+      opacity: isVisible ? 1 : 0,
+      pointerEvents: isVisible ? "auto" : "none",
+    },
+    icon: {
+      width: "20px",
+      height: "20px",
+      fill: "#fff",
+    },
+  }
+
+  const toggleVisibility = () => {
+    if (window.scrollY > 300) {
+      setIsVisible(true)
+
+      if (hideTimeout) {
+        clearTimeout(hideTimeout)
+      }
+
+      const timeout = setTimeout(() => {
+        setIsVisible(false)
+      }, 3000)
+
+      setHideTimeout(timeout)
+    } else {
+      setIsVisible(false)
+    }
+  }
+
+  const scrollToTop = () => {
+    window.scrollTo({
+      top: 0,
+      behavior: "smooth",
+    })
+  }
+
+  useEffect(() => {
+    window.addEventListener("scroll", toggleVisibility)
+
+    return () => {
+      window.removeEventListener("scroll", toggleVisibility)
+      if (hideTimeout) {
+        clearTimeout(hideTimeout)
+      }
+    }
+  }, [hideTimeout])
+
+  return (
+    <div>
+      {isVisible && (
+        <button 
+            onClick={scrollToTop} 
+            style={styles.button}
+            title="Go to top"
+            aria-label="Go to top"
+        >
+            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" style={styles.icon} aria-hidden="true">
+                <path d="M 17.418 14.908 C 17.69 15.176 18.127 15.176 18.397 14.908 C 18.667 14.64 18.668 14.207 18.397 13.939 L 10.489 6.109 C 10.219 5.841 9.782 5.841 9.51 6.109 L 1.602 13.939 C 1.332 14.207 1.332 14.64 1.602 14.908 C 1.873 15.176 2.311 15.176 2.581 14.908 L 10 7.767 L 17.418 14.908 Z"></path>         
+            </svg>
+        </button>
+      )}
+    </div>
+  )
+}
+
+export default ScrollToTopButton