erikghandClaude Opus 5
a200346780
PuntosInflexion era el único que lo montaba. Se va también la referencia que le quedaba colgando en el comentario de useAutoStep. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
87 lines
3.0 KiB
TypeScript
87 lines
3.0 KiB
TypeScript
import { useEffect, useRef, useState } from 'react';
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import type { Variants } from 'framer-motion';
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// EaseOutExpo — smooth editorial deceleration
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export const easeOutExpo = [0.22, 1, 0.36, 1] as const;
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export const fadeInUp: Variants = {
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hidden: { opacity: 0, y: 20 },
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visible: { opacity: 1, y: 0, transition: { duration: 0.5, ease: easeOutExpo } },
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};
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export const staggerContainer: Variants = {
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hidden: {},
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visible: { transition: { staggerChildren: 0.1 } },
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};
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export const viewportOnce = { once: true, amount: 0.3 } as const;
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// Hook: returns true if user prefers reduced motion. Components use this to
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// disable Framer Motion animations (per spec, a11y requirement).
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export function usePrefersReducedMotion() {
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const [reduced, setReduced] = useState(false);
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useEffect(() => {
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const mq = window.matchMedia('(prefers-reduced-motion: reduce)');
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setReduced(mq.matches);
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const handler = () => setReduced(mq.matches);
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mq.addEventListener('change', handler);
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return () => mq.removeEventListener('change', handler);
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}, []);
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return reduced;
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}
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// Shared "draw once when scrolled into view" wiring for the SVG illustrations.
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// Returns the ref to attach, whether the element has been seen, and the
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// reduced-motion flag the caller needs anyway to pick its render branch.
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// Observes nothing under reduced motion — those branches render statically.
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export function useEnVista(umbral = 0.4) {
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const reduced = usePrefersReducedMotion();
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const ref = useRef<SVGSVGElement>(null);
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const [enVista, setEnVista] = useState(false);
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useEffect(() => {
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const el = ref.current;
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if (!el || reduced) return;
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const observer = new IntersectionObserver(
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([entry]) => {
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if (entry.isIntersecting) {
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setEnVista(true);
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observer.unobserve(el);
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}
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},
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{ threshold: umbral },
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);
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observer.observe(el);
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return () => observer.disconnect();
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}, [reduced, umbral]);
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return { ref, enVista, reduced };
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}
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// Pass to <motion.*> as motion-reduced guard. When reduced, variants resolve to visible immediately.
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export const motionProps = (reduced: boolean) =>
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reduced
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? { initial: 'visible' as const, animate: 'visible' as const, whileInView: undefined, viewport: undefined }
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: {};
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// Cycles through `count` steps on its own (Mecanismo, ComoEmpezar): each
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// manual change restarts the dwell timer, hovering pauses it, and it never
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// advances at all for reduced-motion users.
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export function useAutoStep(count: number, intervalMs = 3500) {
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const reduced = usePrefersReducedMotion();
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const [active, setActive] = useState(0);
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const [paused, setPaused] = useState(false);
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useEffect(() => {
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if (reduced || paused || count <= 1) return;
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const id = setTimeout(() => setActive((a) => (a + 1) % count), intervalMs);
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return () => clearTimeout(id);
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}, [active, reduced, paused, count, intervalMs]);
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return {
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active,
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setActive,
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hoverProps: { onMouseEnter: () => setPaused(true), onMouseLeave: () => setPaused(false) },
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};
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}
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