Stefan Hacker
43 lines
1.2 KiB
TypeScript
43 lines
1.2 KiB
TypeScript
import { useState, useEffect } from 'react';
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import { ChevronUp } from 'lucide-react';
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import { useAppSettings } from '../context/AppSettingsContext';
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export default function ScrollToTopButton() {
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const { settings } = useAppSettings();
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const [isVisible, setIsVisible] = useState(false);
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useEffect(() => {
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const toggleVisibility = () => {
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// Show button when scrolled past configured threshold
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if (window.scrollY > window.innerHeight * settings.scrollToTopThreshold) {
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setIsVisible(true);
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} else {
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setIsVisible(false);
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}
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};
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window.addEventListener('scroll', toggleVisibility);
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return () => window.removeEventListener('scroll', toggleVisibility);
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}, [settings.scrollToTopThreshold]);
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const scrollToTop = () => {
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window.scrollTo({
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top: 0,
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behavior: 'smooth',
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});
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};
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if (!isVisible) return null;
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return (
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<button
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onClick={scrollToTop}
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className="fixed bottom-6 right-6 p-3 bg-gray-200 hover:bg-gray-300 text-gray-600 rounded-full shadow-md transition-all duration-300 opacity-70 hover:opacity-100 z-50"
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aria-label="Nach oben scrollen"
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title="Nach oben"
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>
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<ChevronUp className="w-5 h-5" />
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</button>
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);
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}
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