47 lines
1.3 KiB
TypeScript
47 lines
1.3 KiB
TypeScript
"use client";
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import { useEffect, useState, type RefObject } from "react";
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type Props = {
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sectionRef: RefObject<HTMLElement | null>;
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title: string;
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offset?: number;
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};
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export function SectionScrollTitle({ sectionRef, title, offset = 350 }: Props) {
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const [offsetX, setOffsetX] = useState(0);
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useEffect(() => {
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const section = sectionRef.current;
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if (!section) return;
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const update = () => {
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const rect = section.getBoundingClientRect();
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const viewportHeight = window.innerHeight;
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const progress = Math.min(
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1,
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Math.max(0, (viewportHeight - rect.top) / (viewportHeight + rect.height * 0.5)),
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);
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setOffsetX(progress * offset);
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};
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update();
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window.addEventListener("scroll", update, { passive: true });
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window.addEventListener("resize", update);
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return () => {
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window.removeEventListener("scroll", update);
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window.removeEventListener("resize", update);
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};
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}, [sectionRef, offset]);
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return (
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<span
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className="pointer-events-none absolute bottom-0 left-1/2 z-0 select-none whitespace-nowrap text-7xl font-bold leading-none text-white/[0.04] sm:text-8xl lg:text-9xl"
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style={{ transform: `translateX(calc(-50% + ${offsetX}px))` }}
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aria-hidden="true"
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>
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{title}
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</span>
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);
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}
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