51 lines
1.8 KiB
TypeScript
51 lines
1.8 KiB
TypeScript
'use client';
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import { useEffect, useState } from 'react';
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import { createPortal } from 'react-dom';
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export function ReadingProgress() {
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const [mounted, setMounted] = useState(false);
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const [progress, setProgress] = useState(0);
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useEffect(() => {
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setMounted(true);
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}, []);
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useEffect(() => {
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if (!mounted) return;
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const handleScroll = () => {
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const { scrollTop, scrollHeight, clientHeight } = document.documentElement;
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const total = scrollHeight - clientHeight;
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if (total <= 0) {
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setProgress(0);
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return;
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}
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const value = Math.min(100, Math.max(0, (scrollTop / total) * 100));
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setProgress(value);
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};
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handleScroll();
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window.addEventListener('scroll', handleScroll, { passive: true });
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return () => window.removeEventListener('scroll', handleScroll);
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}, [mounted]);
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if (!mounted) return null;
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return createPortal(
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<div className="pointer-events-none fixed inset-x-0 top-0 z-[1200] h-2 bg-transparent">
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<div className="relative h-2 w-full overflow-visible">
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<div
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className="absolute inset-y-0 left-0 w-full origin-left rounded-full bg-gradient-to-r from-[rgba(124,58,237,0.9)] via-[rgba(167,139,250,0.9)] to-[rgba(14,165,233,0.8)] shadow-[0_0_12px_rgba(124,58,237,0.5)] transition-[transform,opacity] duration-300 ease-out"
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style={{ transform: `scaleX(${progress / 100})`, opacity: progress > 0 ? 1 : 0 }}
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>
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<span className="absolute -right-2 top-1/2 h-3 w-3 -translate-y-1/2 rounded-full bg-white/80 blur-[1px] dark:bg-slate-900/80" aria-hidden="true" />
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</div>
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<span className="absolute inset-x-0 top-2 h-px bg-gradient-to-r from-transparent via-blue-200/40 to-transparent blur-sm dark:via-blue-900/30" aria-hidden="true" />
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</div>
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</div>,
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document.body
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);
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}
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