Krishna Ayyalasomayajula
06481d0c26
- Wire visible state to className in ScrollToTop component - Replace hard-coded rgba with color-mix() for theme-aware background - Dark mode reading progress uses 15% ink color mix
29 lines
943 B
TypeScript
29 lines
943 B
TypeScript
"use client";
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import { useEffect, useState } from "react";
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import { m } from "motion/react";
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export function ScrollToTop() {
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const [visible, setVisible] = useState(false);
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useEffect(() => {
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const toggle = () => setVisible(window.scrollY > 400);
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toggle();
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window.addEventListener("scroll", toggle, { passive: true });
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return () => window.removeEventListener("scroll", toggle);
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}, []);
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return (
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<m.button
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type="button"
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onClick={() => window.scrollTo({ top: 0, behavior: "smooth" })}
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whileHover={{ scale: 1.1 }}
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whileTap={{ scale: 0.95 }}
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className={`scroll-to-top ${visible ? 'visible' : ''}`}
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aria-label="Scroll to top"
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>
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<svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><polyline points="18 15 12 9 6 15"/></svg>
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</m.button>
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);
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}
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