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kit-ui/components/BackToTop.tsx

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'use client';
import { motion, useScroll, useSpring } from 'framer-motion';
import { useState, useEffect } from 'react';
export default function BackToTop() {
const [isVisible, setIsVisible] = useState(false);
const { scrollYProgress } = useScroll();
const scaleX = useSpring(scrollYProgress, {
stiffness: 100,
damping: 30,
restDelta: 0.001,
});
useEffect(() => {
const toggleVisibility = () => {
if (window.pageYOffset > 300) {
setIsVisible(true);
} else {
setIsVisible(false);
}
};
window.addEventListener('scroll', toggleVisibility);
return () => window.removeEventListener('scroll', toggleVisibility);
}, []);
const scrollToTop = () => {
window.scrollTo({
top: 0,
behavior: 'smooth',
});
};
return (
<>
{/* Progress bar */}
<motion.div
className="fixed top-0 left-0 right-0 h-1 bg-gradient-to-r from-purple-500 to-cyan-500 transform origin-left z-50"
style={{ scaleX }}
/>
{/* Back to top button */}
{isVisible && (
<motion.button
onClick={scrollToTop}
className="fixed bottom-8 right-8 p-4 rounded-full glass hover:bg-white/10 text-purple-400 hover:text-purple-300 transition-colors shadow-lg z-40 group"
initial={{ opacity: 0, y: 20 }}
animate={{ opacity: 1, y: 0 }}
exit={{ opacity: 0, y: 20 }}
whileHover={{ scale: 1.1 }}
whileTap={{ scale: 0.9 }}
aria-label="Back to top"
>
<svg
className="w-6 h-6"
fill="none"
stroke="currentColor"
viewBox="0 0 24 24"
>
<path
strokeLinecap="round"
strokeLinejoin="round"
strokeWidth={2}
d="M5 10l7-7m0 0l7 7m-7-7v18"
/>
</svg>
{/* Tooltip */}
<span className="absolute bottom-full right-0 mb-2 px-3 py-1 text-xs text-white bg-gray-900 rounded-lg opacity-0 group-hover:opacity-100 transition-opacity whitespace-nowrap">
Back to top
</span>
</motion.button>
)}
</>
);
}