# Photo album > A handheld tablet’s photo album: twelve painted pictures a page, a gliding cyan selection, a large view, and a camera whose shutter flashes before “Save in album?”. The page of a game’s handheld tablet where the player keeps the pictures taken with its camera. A navy screen with a cyan glow sits in an ornamental bezel; twelve pictures a page, each a small painted landscape at its own time of day, wait in light frames, with page arrows and a peek of the next page. A opens one full size; Y opens the camera, where A fires the shutter and the tablet asks “Save in album?” with Delete and Save. Saving flies the picture into the first slot while the others make room. Use the arrow keys, A, B and Y, or click. A React component by Bruno Delorence: https://brunodelorence.com/components/photo-album. MIT License, Copyright (c) 2026 Bruno Delorence. Category: Games · Menus. ## Anatomy 1. **Header and shoulder tabs**: The page’s name between two tabs naming the neighbouring pages, each with its L or R key cap; a click, L / Q or R / E calls `onTab`. 2. **Medallion**: One ornamental SVG, mirrored into the bezel’s four corners over the repeated rail tile; it is aria-hidden. 3. **Screen**: The navy screen with a cyan edge glow, inset in the bezel; the album, the large view and the camera all draw inside it. 4. **Picture slot**: An option of the page’s `listbox`: a light outer line, a dark gap and the painted picture with a camera badge; the selected one lifts by 3.5%. 5. **Selection frame**: One chamfered cyan frame laid over the grid and moved by translate in 170 ms with a small overshoot, so it glides from slot to slot. 6. **Next-page peek**: The first column of the next page, cut by the screen’s edge, so the reader sees there is more; the previous page peeks on the left. 7. **Page arrow**: A glowing arrow beside the grid that turns the page; it is hidden on the first or last page. 8. **Button hints**: Camera (Y), Back (B) and Select (A) as real buttons with `aria-keyshortcuts`; they change with the screen. ## When to use - A page of a game’s pause menu or handheld device where the player looks back over the pictures they took. - A collection read as pictures first: a grid of thumbnails, twelve a page, with the name and place only once one is opened. - A grid driven by a controller: one frame moved by the arrows, A to open, B to go back, Y for the camera, with button hints at the foot. - An in-game camera whose shot is confirmed before it is kept: a shutter, then “Save in album?” with Delete and Save. - A screen that sits between neighbouring menu pages, named on L and R shoulder tabs. ## When not to use - A photo gallery or library in an app or on a site. Use a responsive image grid with a lightbox; this one is a fixed, framed game screen. - Items with counts, stats or prices to compare. Use an item grid or inventory, which shows each tile’s numbers. - Creatures or entries with long descriptions. Use a compendium or field guide, which keeps a text panel beside the list. - Uploading or editing pictures. Use a file picker and an editor; the camera here only takes the next scripted shot. - A quick confirmation with no picture. Use a plain confirm dialog; this one is built around the shot it asks about. ## Installation Install it with the shadcn CLI, into components/photo-album of any React project: ```sh npx shadcn@latest add https://brunodelorence.com/r/photo-album.json ``` Or copy all the source files below into one folder of your project. Either way it needs React 19 and a bundler with CSS Modules (Next.js, Vite). It has a dark colour scheme. Its colours are CSS light-dark() pairs, kept inside @supports so that builds which rewrite light-dark() for older browsers leave them alone: it follows your page’s color-scheme (light unless the page sets one) or its colorScheme prop, with nothing to configure. Browsers without light-dark() show it light. ## Usage ```tsx import { PhotoAlbum, type AlbumPhoto } from './photo-album'; const PHOTOS: AlbumPhoto[] = [ { id: 'a', scene: 'birch-lake', title: 'Birch Shore', place: 'Lantern Lake' }, { id: 'b', scene: 'night-peaks', title: 'Night Over the Peaks', place: 'Crown Range' }, ]; export function Tablet({ onClose }: { onClose: () => void }) { return ( console.log('Saved', photo.title, album.length)} onBack={onClose} /> ); } ``` ## States - **Album**: The defaults with `autoplay={false}`: page 1 of 2, the first picture selected, the next page peeking on the right. - **Another picture selected**: `defaultSelected="p07"`: the frame on the second row, the picture lifted under it. - **Second page**: `defaultSelected="p14"`: page 2 with six pictures and six empty frames; only the left arrow and the left peek show. - **One page**: Five pictures: no page arrows, no peek, and the rest of the grid drawn as empty frames. - **Empty album**: `photos={[]}`: twelve empty frames and no selection; Y still opens the camera. - **Large view**: `defaultView="photo"`: the selected picture full size with its number, name and place, and arrows to the pictures beside it. - **Camera**: `defaultView="camera"`: the live view under the viewfinder, hearts in the header, Back and Take Photo at the foot. - **Save in album?**: `defaultView="confirm"`: the shot over the dimmed view with its place, and Save lit; left lights Delete. - **Narrow**: Under 640 px the tablet turns portrait: a 3 × 4 grid, smaller medallions, and every length scaled with the width. ## How it works - The album is a flat list of pictures, newest first, shown twelve a page (4 × 3, or 3 × 4 under 640 px). The page is derived from the selected index, so moving past the grid’s edge, the page arrows or Page Up / Page Down all turn the page; the grid is keyed by page and slides in 300 ms from the side of travel. - The selection is one chamfered SVG frame laid over the grid and moved by translate (170 ms, an overshoot curve), with a soft wide stroke under a sharp one and a drop-shadow glow; the selected picture lifts by 3.5 %. - Each picture is a 320 × 180 vector painting (scenes.tsx): a sky gradient, a sun or moon with its glow, ridges from a seeded midpoint displacement that fade into an aerial haze, a ground with brushed grass, and a subject (pillars, birches, standing stones, palms, an oak, a fort, a gate) whose crowns are painted in three passes. A shared finish adds light from the upper left, a darker foreground and a vignette. Nothing is a bitmap, so a picture stays sharp from the 168-unit thumbnail to the full screen. - Opening a picture is a FLIP: the large view is measured after it mounts and played from the slot’s rectangle (380 ms); B shrinks the slot back from the large view’s rectangle. Left and right swap the picture with a short slide. - The camera shows the live view, drifting slowly as a held camera does, under a breathing viewfinder. A fires the shutter: black bands close and open in 60 ms over a white flash that fades in 520 ms, and at 180 ms the “Save in album?” dialog pops in (scale 0.94 to 1 with a settle) over the dimmed view. Only the button A would press is lit: a chamfered bright outline (a clip-path polygon) and a breathing glow. - Saving measures the dialog’s picture and every slot, inserts the picture first, and plays the FLIPs: the new slot flies from the dialog with a lift at mid-flight (720 ms) above the others, which shift one slot over after 260 ms with a small overshoot; then a cyan ring pings the slot. Delete drops the picture and returns to the viewfinder. - Every length is a multiple of --u, 1 px when the tablet has its 960 px and less on a narrower stage; the bezel’s rail is one vector tile repeated, its four corner medallions one SVG mirrored. The tablet brings its own dark surface, so only its shadow and halo follow the page’s colour scheme. - A demo browses, opens a picture, pages, takes a picture and saves it while the album is on screen and untouched; any input hands it to the reader. Looping animations pause offscreen. ## API reference - **photos** (`AlbumPhoto[]`, default `eighteen painted pictures`): The album, newest first: { id, scene, title, place?, mirrored? }. scene is one of the fifteen painted scenes (SCENE_IDS); mirrored shows it flipped, so one scene can make two pictures. - **shots** (`AlbumPhoto[]`, default `three pictures`): The pictures the camera takes, in turn; it loops. - **defaultView** (`'album' | 'photo' | 'camera' | 'confirm'`, default `'album'`): The screen it opens on: the grid, the selected picture in the large view, the camera, or “Save in album?” with the camera’s first shot. - **defaultSelected** (`string`): The id of the picture selected first (the first if not given). - **heading** (`string`, default `'Album'`): The page’s name, between the shoulder tabs. - **tabs** (`[string, string]`, default `['Map', 'Field Guide']`): The neighbouring pages named on the L and R shoulder tabs. - **onSelect** (`(photo: AlbumPhoto) => void`): Called when the selection moves to a picture. - **onOpen** (`(photo: AlbumPhoto) => void`): Called when a picture opens in the large view. - **onSave** (`(photo: AlbumPhoto, photos: AlbumPhoto[]) => void`): Called with the new picture and the album after it, when one is saved. - **onDiscard** (`(photo: AlbumPhoto) => void`): Called when a picture just taken is deleted instead. - **onTab** (`(side: 'left' | 'right') => void`): Called on L or R (or a click on a shoulder tab): the neighbouring page to go to. - **onBack** (`() => void`): Called on B, Escape or the Back hint from the album grid. - **autoplay** (`boolean`, default `true`): While on screen and untouched, a short visit: browse, open a picture, turn the page, take a picture and save it. - **colorScheme** (`'light' | 'dark' | 'system'`): Forces light or dark for the tablet’s shadow and halo and the focus ring; by default it follows the page. The tablet itself stays dark. - **className** (`string`): Added to the root. ## Accessibility - The page is a listbox of options named by title and place (“Birch Shore, Lantern Lake”), labelled with the page number (“Album, page 1 of 2”) and followed with aria-activedescendant; the page arrows, shoulder tabs and button prompts are real buttons with aria-labels or aria-keyshortcuts. - Keyboard as a controller: arrows (or W, S) move the selection and turn the page at the grid’s edge, Page Up / Page Down turn it, A, Enter or Space open the picture, B or Escape go back, Y (or C) opens the camera, L / Q and R / E call onTab. In the camera, A takes the picture; in the dialog, left and right choose, A confirms, B deletes. - The save prompt is an alertdialog labelled by its question and described by the place; when it opens while the reader is in the album, the focus moves to Save, and left and right move it between the buttons. - A polite live region says the page when it turns, the picture opened, “Save in album?”, and what was saved or deleted. - The paintings, bezel, medallions, glyphs, flash and viewfinder are aria-hidden; the hearts are one image named “7 hearts”. Every control shows a :focus-visible ring. - Reduced motion: no flights, flash, slides, breathing or drift; states change at once and the demo never plays. ## Source ### photo-album/photo-album.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useCallback, useEffect, useEffectEvent, useId, useLayoutEffect, useRef, useState, type CSSProperties, type KeyboardEvent, } from 'react'; import { AlertDot, FaceGlyph, Heart, KeyCap, Medallion, PageArrow, PhotoBadge, Reticle, SelectFrame, } from './glyphs'; import { DEFAULT_PHOTOS, DEFAULT_SHOTS, type AlbumPhoto } from './photos'; import { Scene, SCENE_IDS, type SceneId } from './scenes'; import { useAutoplay } from './use-autoplay'; import styles from './photo-album.module.css'; /* * Photo album: the page of a game's handheld tablet where the player keeps the pictures taken with * its camera. A navy screen with a cyan glow sits in an ornamental bezel; the album shows twelve * pictures a page (4 × 3, or 3 × 4 on a narrow stage), each a small painted landscape in a light * frame. Page arrows and a peek of the neighbouring page's column say there is more. * * - The selection is one chamfered cyan frame laid over the grid and moved by translate, with a * small overshoot; the selected picture lifts. Arrows move it, and crossing the grid's edge turns * the page: the new page slides in from the side of travel. * - A (Enter) opens the picture: it grows from its slot to the large view (FLIP), and shrinks back * into its slot on B (Escape). Left and right page through the pictures there. * - Y opens the camera: the live view, a breathing viewfinder, and A to take the picture. The * shutter fires (a white flash and a blink of black bands), then "Save in album?" pops up over * the dimmed view with Delete and Save; only the button A would press glows. * - Save files the picture first in the album: the dialog fades, the picture flies from the dialog * into the first slot while the others shift one slot over (all FLIP, Web Animations on * transforms), and a cyan ring pings the slot. Delete drops the picture and returns to the * viewfinder. * - The pictures are vector paintings (scenes.tsx), so everything stays sharp at any size. Every * length is a multiple of --u, 1 px at full size, less on a narrower stage. * - A demo plays a short visit (browse, open, page, take a picture, save it) while the album is on * screen and untouched; any input hands it to the reader. Reduced motion swaps states at once. */ export type { AlbumPhoto, SceneId }; export { DEFAULT_PHOTOS, DEFAULT_SHOTS, SCENE_IDS }; export type PhotoAlbumView = 'album' | 'photo' | 'camera'; export type PhotoAlbumProps = { className?: string; /** The pictures in the album, newest first. */ photos?: AlbumPhoto[]; /** The pictures the camera takes, in turn (it loops). */ shots?: AlbumPhoto[]; /** The screen it opens on; 'confirm' opens on "Save in album?" with the camera's first shot. */ defaultView?: PhotoAlbumView | 'confirm'; /** The id of the picture selected first. */ defaultSelected?: string; /** The neighbouring pages named on the shoulder tabs, [left, right]. */ tabs?: [string, string]; /** The page's name, between the tabs. */ heading?: string; /** Called when the selection moves to a picture. */ onSelect?: (photo: AlbumPhoto) => void; /** Called when a picture is opened in the large view. */ onOpen?: (photo: AlbumPhoto) => void; /** Called with the new picture when one is saved, and the album after it. */ onSave?: (photo: AlbumPhoto, photos: AlbumPhoto[]) => void; /** Called when a picture just taken is deleted instead of saved. */ onDiscard?: (photo: AlbumPhoto) => void; /** Called on L / R (or the tabs): the neighbouring page to go to. */ onTab?: (side: 'left' | 'right') => void; /** Called on B or Escape from the album grid. */ onBack?: () => void; /** Plays a short visit while on screen and untouched. */ autoplay?: boolean; colorScheme?: 'light' | 'dark' | 'system'; }; type View = PhotoAlbumView | 'confirm'; type Choice = 'delete' | 'save'; type Action = 'up' | 'down' | 'left' | 'right' | 'a' | 'b' | 'y' | 'next-page' | 'prev-page' | 'reset'; const PER_PAGE = 12; /** The demo: a short visit, as actions at ms from its start. */ const DEMO: { at: number; key: Action }[] = [ { at: 0, key: 'reset' }, { at: 900, key: 'right' }, { at: 1500, key: 'right' }, { at: 2100, key: 'down' }, { at: 2900, key: 'a' }, { at: 4300, key: 'right' }, { at: 5300, key: 'b' }, { at: 6200, key: 'next-page' }, { at: 7300, key: 'down' }, { at: 8200, key: 'prev-page' }, { at: 9200, key: 'y' }, { at: 10800, key: 'a' }, { at: 12300, key: 'left' }, { at: 13000, key: 'right' }, { at: 13800, key: 'a' }, { at: 15400, key: 'right' }, ]; const DEMO_LENGTH = 17200; const ARROWS: Record = { ArrowUp: 'up', ArrowDown: 'down', ArrowLeft: 'left', ArrowRight: 'right', w: 'up', s: 'down', a: 'a', Enter: 'a', ' ': 'a', b: 'b', Escape: 'b', Backspace: 'b', y: 'y', c: 'y', PageDown: 'next-page', PageUp: 'prev-page', }; /** Plays a FLIP: the element starts where `from` is and settles where it now lies. */ function flip(element: Element, from: DOMRect, options: KeyframeAnimationOptions, lift = 0) { const to = element.getBoundingClientRect(); if (!to.width || !to.height) return; const dx = from.left - to.left; const dy = from.top - to.top; const sx = from.width / to.width; const sy = from.height / to.height; if (Math.abs(dx) < 0.5 && Math.abs(dy) < 0.5 && Math.abs(sx - 1) < 0.01) return; const start = `translate(${dx}px, ${dy}px) scale(${sx}, ${sy})`; const keyframes: Keyframe[] = lift ? [ { transform: start, zIndex: 4, offset: 0 }, { transform: `translate(${dx * 0.35}px, ${dy * 0.35 - lift}px) scale(${1 + (sx - 1) * 0.3}, ${1 + (sy - 1) * 0.3})`, zIndex: 4, offset: 0.55, }, { transform: 'none', zIndex: 4, offset: 1 }, ] : [{ transform: start }, { transform: 'none' }]; element.animate(keyframes, { fill: 'backwards', ...options }); } export function PhotoAlbum({ className, photos: initialPhotos = DEFAULT_PHOTOS, shots = DEFAULT_SHOTS, defaultView = 'album', defaultSelected, tabs = ['Map', 'Field Guide'], heading = 'Album', onSelect, onOpen, onSave, onDiscard, onTab, onBack, autoplay = true, colorScheme, }: PhotoAlbumProps) { const id = useId(); const { ref, take, visible, reduced, playing } = useAutoplay(); const demo = playing && autoplay; const [start] = useState(() => ({ photos: initialPhotos, selected: Math.max( 0, initialPhotos.findIndex((photo) => photo.id === defaultSelected), ), view: defaultView as View, })); const [photos, setPhotos] = useState(start.photos); const [selected, setSelected] = useState(start.selected); const [view, setView] = useState(start.view); const [choice, setChoice] = useState('save'); const [shotCount, setShotCount] = useState(0); const [travel, setTravel] = useState<1 | -1>(1); const [flash, setFlash] = useState(0); const [ping, setPing] = useState(null); const [narrow, setNarrow] = useState(false); const [said, setSaid] = useState(''); // Set for a moment after a save, so the album shows at once under the flying picture. const [arriving, setArriving] = useState(false); const cols = narrow ? 3 : 4; const pages = Math.max(1, Math.ceil(photos.length / PER_PAGE)); const index = Math.min(selected, Math.max(0, photos.length - 1)); const page = Math.floor(index / PER_PAGE); const photo: AlbumPhoto | undefined = photos[index]; const shotBase = shots.length ? shots[shotCount % shots.length] : undefined; const shot = shotBase && { ...shotBase, id: `${shotBase.id}-${shotCount}` }; const slots = useRef(new Map()); const dialogPhoto = useRef(null); const viewerPhoto = useRef(null); const pending = useRef< | { kind: 'save'; id: string; from?: DOMRect; before: Map } | { kind: 'open'; from?: DOMRect } | { kind: 'close'; id: string; from?: DOMRect } | null >(null); const timers = useRef([]); const later = useCallback((fn: () => void, ms: number) => { timers.current.push(window.setTimeout(fn, ms)); }, []); useEffect(() => () => timers.current.forEach((timer) => window.clearTimeout(timer)), []); // The narrow layout (3 × 4) follows the stage's width, as the CSS does. useEffect(() => { const element = ref.current; if (!element) return; const observer = new ResizeObserver(([entry]) => setNarrow(entry.contentRect.width < 640)); observer.observe(element); return () => observer.disconnect(); }, [ref]); const select = useCallback( (to: number) => { if (!photos.length) return; const next = Math.max(0, Math.min(photos.length - 1, to)); if (next === index) return; const nextPage = Math.floor(next / PER_PAGE); if (nextPage !== page) { setTravel(nextPage > page ? 1 : -1); setSaid(`Page ${nextPage + 1} of ${pages}`); } setSelected(next); onSelect?.(photos[next]); }, [photos, index, page, pages, onSelect], ); const turnPage = useCallback( (dir: 1 | -1) => { const target = page + dir; if (target < 0 || target >= pages) return; const slot = index % PER_PAGE; select(Math.min(target * PER_PAGE + slot, photos.length - 1)); }, [page, pages, index, photos.length, select], ); const moveGrid = useCallback( (action: 'up' | 'down' | 'left' | 'right') => { const slot = index % PER_PAGE; const col = slot % cols; const row = Math.floor(slot / cols); const rows = PER_PAGE / cols; if (action === 'left') { if (col > 0) select(index - 1); else if (page > 0) select((page - 1) * PER_PAGE + row * cols + cols - 1); } else if (action === 'right') { if (col < cols - 1 && index + 1 < photos.length) select(index + 1); else if (page < pages - 1) select(Math.min((page + 1) * PER_PAGE + row * cols, photos.length - 1)); } else if (action === 'up') { if (row > 0) select(index - cols); } else if (row < rows - 1 && index + cols < photos.length) select(index + cols); }, [index, cols, page, pages, photos.length, select], ); const open = useCallback(() => { if (!photo) return; pending.current = { kind: 'open', from: slots.current.get(photo.id)?.getBoundingClientRect() }; setView('photo'); setSaid(`${photo.title}${photo.place ? `, ${photo.place}` : ''}`); onOpen?.(photo); }, [photo, onOpen]); const close = useCallback(() => { if (photo) pending.current = { kind: 'close', id: photo.id, from: viewerPhoto.current?.getBoundingClientRect(), }; setView('album'); setSaid('Album'); }, [photo]); const openCamera = useCallback(() => { setView('camera'); setSaid('Camera. Press A to take a picture.'); }, []); const shutter = useCallback(() => { if (!shot) return; setFlash((count) => count + 1); setChoice('save'); if (reduced) setView('confirm'); else later(() => setView('confirm'), 180); setSaid('Save in album? Delete or Save.'); }, [shot, reduced, later]); const discard = useCallback(() => { if (!shot) return; setView('camera'); setShotCount((count) => count + 1); setSaid('Picture deleted.'); onDiscard?.(shot); }, [shot, onDiscard]); const save = useCallback(() => { if (!shot) return; const before = new Map(); slots.current.forEach((element, key) => before.set(key, element.getBoundingClientRect())); pending.current = { kind: 'save', id: shot.id, from: dialogPhoto.current?.getBoundingClientRect(), before, }; const next = [shot, ...photos]; setPhotos(next); setSelected(0); setTravel(-1); setView('album'); setShotCount((count) => count + 1); setArriving(true); later(() => setArriving(false), 900); setSaid(`Saved in album: ${shot.title}.`); onSave?.(shot, next); }, [shot, photos, onSave, later]); // The FLIPs: after the DOM has the new layout, play each moved element from where it was. useLayoutEffect(() => { const job = pending.current; if (!job) return; pending.current = null; if (reduced) { if (job.kind === 'save') setPing(job.id); return; } if (job.kind === 'open') { if (viewerPhoto.current && job.from) flip(viewerPhoto.current, job.from, { duration: 380, easing: 'cubic-bezier(0.2, 0.9, 0.25, 1.04)', }); } else if (job.kind === 'close') { const element = slots.current.get(job.id); if (element && job.from) flip(element, job.from, { duration: 340, easing: 'cubic-bezier(0.25, 0.8, 0.3, 1)' }); } else { slots.current.forEach((element, key) => { if (key === job.id) { if (job.from) flip( element, job.from, { duration: 720, easing: 'cubic-bezier(0.3, 0.6, 0.25, 1)' }, 24, ); } else { const was = job.before.get(key); if (was) flip(element, was, { duration: 440, delay: 260, easing: 'cubic-bezier(0.3, 0.9, 0.3, 1.06)', }); } }); later(() => setPing(job.id), 640); } }, [photos, view, reduced, later]); // The dialog takes the focus when it opens, if the reader is in the album. const saveButton = useRef(null); const deleteButton = useRef(null); const tablet = useRef(null); useEffect(() => { const root = tablet.current; if (!root || !root.contains(document.activeElement)) return; if (view === 'confirm') saveButton.current?.focus({ preventScroll: true }); else root.focus({ preventScroll: true }); }, [view]); const act = useCallback( (action: Action) => { if (view === 'album') { if (action === 'up' || action === 'down' || action === 'left' || action === 'right') moveGrid(action); else if (action === 'a') open(); else if (action === 'b') { setSaid('Back'); onBack?.(); } else if (action === 'y') openCamera(); else if (action === 'next-page') turnPage(1); else if (action === 'prev-page') turnPage(-1); } else if (view === 'photo') { if (action === 'left' || action === 'right') { const to = index + (action === 'right' ? 1 : -1); if (to >= 0 && to < photos.length) { setTravel(action === 'right' ? 1 : -1); select(to); setSaid(photos[to].title); } } else if (action === 'b' || action === 'a') close(); } else if (view === 'camera') { if (action === 'a') shutter(); else if (action === 'b') { setView('album'); setSaid('Album'); } } else if (view === 'confirm') { if (action === 'left') setChoice('delete'); else if (action === 'right') setChoice('save'); else if (action === 'a') (choice === 'save' ? save : discard)(); else if (action === 'b') discard(); } }, [ view, moveGrid, open, onBack, openCamera, turnPage, index, photos, select, close, shutter, choice, save, discard, ], ); // The demo, on its own clock: it restarts from the top each time it is handed back. const step = useEffectEvent((key: Action) => { if (key === 'reset') { setPhotos(start.photos); setSelected(start.selected); setView('album'); setPing(null); setTravel(-1); } else act(key); }); useEffect(() => { if (!demo) return; const ids: number[] = []; const run = (from: number) => { for (const item of DEMO) ids.push(window.setTimeout(() => step(item.key), from + item.at)); ids.push(window.setTimeout(() => run(0), from + DEMO_LENGTH)); }; run(0); return () => ids.forEach((timer) => window.clearTimeout(timer)); }, [demo]); const onKeyDown = (event: KeyboardEvent) => { take(); if (event.altKey || event.ctrlKey || event.metaKey) return; const key = event.key.length === 1 ? event.key.toLowerCase() : event.key; const onButton = (event.target as HTMLElement).tagName === 'BUTTON'; // On a focused button, Enter and Space are its own click. if (onButton && (key === 'Enter' || key === ' ')) return; if (key === 'l' || key === 'q' || key === 'r' || key === 'e') { if (view === 'album' || view === 'photo') { event.preventDefault(); onTab?.(key === 'l' || key === 'q' ? 'left' : 'right'); setSaid(key === 'l' || key === 'q' ? tabs[0] : tabs[1]); } return; } const action = ARROWS[key]; if (!action) return; if (key === 'Backspace' && view !== 'photo') return; event.preventDefault(); act(action); if (view === 'confirm' && (action === 'left' || action === 'right')) (action === 'left' ? deleteButton : saveButton).current?.focus({ preventScroll: true }); }; const pageItems = photos.slice(page * PER_PAGE, page * PER_PAGE + PER_PAGE); const slotIndex = index % PER_PAGE; const nextPeek = page < pages - 1 ? Array.from( { length: PER_PAGE / cols }, (_, row) => photos[(page + 1) * PER_PAGE + row * cols], ) : []; const prevPeek = page > 0 ? Array.from( { length: PER_PAGE / cols }, (_, row) => photos[(page - 1) * PER_PAGE + row * cols + cols - 1], ) : []; const inCamera = view === 'camera' || view === 'confirm'; const optionId = (item: AlbumPhoto) => `${id}-p-${item.id}`; return (
{/* The album grid: always laid out, so a saved picture has a slot to fly to. */}
{prevPeek.length > 0 && ( )} {nextPeek.length > 0 && ( )}
    {pageItems.map((item, at) => (
  • { if (element) slots.current.set(item.id, element); else slots.current.delete(item.id); }} role="option" aria-selected={at === slotIndex} aria-label={`${item.title}${item.place ? `, ${item.place}` : ''}`} className={styles.slot} data-selected={at === slotIndex || undefined} data-ping={ping === item.id || undefined} onAnimationEnd={(event) => { if (event.animationName.includes('ping')) setPing(null); }} onClick={() => { take(); if (page * PER_PAGE + at === index) open(); else select(page * PER_PAGE + at); }} data-part="photo" >
    • ))} {Array.from({ length: PER_PAGE - pageItems.length }, (_, at) => (
{photo && ( )}
{/* The large view of one picture. */} {view === 'photo' && photo && (

No. {String(index + 1).padStart(3, '0')} {photo.title}

{photo.place &&

{photo.place}

}
)} {/* The camera: the live view, then the save dialog over it. */} {inCamera && shot && (
{view === 'camera' && ( )} {view === 'confirm' && (

Save in album?

)}
)} 0 || undefined} aria-hidden="true" data-part="flash" />
{/* The bezel: the rails, the header and the footer, and the four medallions. */} ); } function Hint({ label, letter, keys, onClick, }: { label: string; letter: string; keys: string; onClick: () => void; }) { return ( ); } ``` ### photo-album/photos.ts ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. import type { SceneId } from './scenes'; /** A picture in the album: which painted scene it shows, its name, and where it was taken. */ export type AlbumPhoto = { id: string; scene: SceneId; /** The picture's name, read out and shown in the large view. */ title: string; /** Where it was taken, shown over the picture in the save dialog and the large view. */ place?: string; /** Shows the scene mirrored, so one scene can make two different pictures. */ mirrored?: boolean; }; export const DEFAULT_PHOTOS: AlbumPhoto[] = [ { id: 'p01', scene: 'colonnade', title: 'Pillar Court', place: 'Old Capital Outskirts' }, { id: 'p02', scene: 'birch-lake', title: 'Birch Shore', place: 'Lantern Lake' }, { id: 'p03', scene: 'standing-stones', title: 'Seven Stones', place: 'Windmeet Plain' }, { id: 'p04', scene: 'palm-cove', title: 'Palm Cove at Dusk', place: 'Amber Coast' }, { id: 'p05', scene: 'canyon-dawn', title: 'Ochre Canyon', place: 'Redfall Gorge' }, { id: 'p06', scene: 'lone-oak', title: 'The Lone Oak', place: 'Greenmoor' }, { id: 'p07', scene: 'deep-wood', title: 'Under the Canopy', place: 'Mossdeep Wood' }, { id: 'p08', scene: 'hill-fort', title: 'Hill Fort', place: 'Bastion Rise' }, { id: 'p09', scene: 'still-pond', title: 'Still Pond', place: 'Mossdeep Wood' }, { id: 'p10', scene: 'old-plaza', title: 'Evening Plaza', place: 'Willowmark' }, { id: 'p11', scene: 'stone-gate', title: 'The Stone Gate', place: 'Narrow Pass' }, { id: 'p12', scene: 'night-peaks', title: 'Night Over the Peaks', place: 'Crown Range' }, { id: 'p13', scene: 'lone-oak', title: 'Oak at Noon', place: 'Greenmoor', mirrored: true }, { id: 'p14', scene: 'birch-lake', title: 'Far Shore', place: 'Lantern Lake', mirrored: true }, { id: 'p15', scene: 'stone-gate', title: 'Gate, Looking Back', place: 'Narrow Pass', mirrored: true, }, { id: 'p16', scene: 'palm-cove', title: 'Low Tide', place: 'Amber Coast', mirrored: true }, { id: 'p17', scene: 'colonnade', title: 'East Colonnade', place: 'Old Capital Outskirts', mirrored: true, }, { id: 'p18', scene: 'still-pond', title: 'Pond Light', place: 'Mossdeep Wood', mirrored: true }, ]; /** The pictures the camera takes, in turn. */ export const DEFAULT_SHOTS: AlbumPhoto[] = [ { id: 's01', scene: 'mesa-dusk', title: 'Dusk on the Mesa', place: 'Dune Stable Road' }, { id: 's02', scene: 'snow-dawn', title: 'Frost at Dawn', place: 'Frostpine Ridge' }, { id: 's03', scene: 'sea-cliffs', title: 'The White Light', place: 'Gull Point' }, ]; ``` ### photo-album/scenes.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. import { useId, type ReactNode } from 'react'; /* * The album's pictures: small painted landscapes drawn in SVG, one per scene, at different times of * day. Each is a 320 × 180 drawing in layers (a sky gradient, a sun or a moon with its glow, ridges * that fade into the haze, a ground, and a subject: pillars, birches, standing stones, palms, an * oak, a fort, a gate…). Ridges come from a seeded midpoint displacement, so they are irregular but * the same on every render. Nothing is a bitmap: a picture stays sharp at any size. */ export type SceneId = | 'colonnade' | 'birch-lake' | 'standing-stones' | 'palm-cove' | 'canyon-dawn' | 'lone-oak' | 'deep-wood' | 'hill-fort' | 'still-pond' | 'old-plaza' | 'stone-gate' | 'night-peaks' | 'mesa-dusk' | 'snow-dawn' | 'sea-cliffs'; export const SCENE_IDS: SceneId[] = [ 'colonnade', 'birch-lake', 'standing-stones', 'palm-cove', 'canyon-dawn', 'lone-oak', 'deep-wood', 'hill-fort', 'still-pond', 'old-plaza', 'stone-gate', 'night-peaks', 'mesa-dusk', 'snow-dawn', 'sea-cliffs', ]; /** Rounds to 0.01, so the server and the browser print the same numbers (their trig can differ). */ const q = (value: number) => Math.round(value * 100) / 100; const W = 320; const H = 180; /** A small seeded random generator (mulberry32), so a ridge is the same on every render. */ function random(seed: number) { let a = seed >>> 0; return () => { a = (a + 0x6d2b79f5) >>> 0; let t = a; t = Math.imul(t ^ (t >>> 15), t | 1); t ^= t + Math.imul(t ^ (t >>> 7), t | 61); return ((t ^ (t >>> 14)) >>> 0) / 4294967296; }; } /** A ridge line across the picture by midpoint displacement, closed down to the bottom. */ function ridge(y: number, amp: number, seed: number, bottom = H, rough = 0.55) { const rand = random(seed); let points = [y + (rand() - 0.5) * amp, y + (rand() - 0.5) * amp]; let spread = amp; for (let level = 0; level < 6; level++) { const next: number[] = []; for (let i = 0; i < points.length - 1; i++) { next.push(points[i], (points[i] + points[i + 1]) / 2 + (rand() - 0.5) * spread); } next.push(points[points.length - 1]); points = next; spread *= rough; } const step = W / (points.length - 1); const line = points.map((value, i) => `${(i * step).toFixed(1)} ${value.toFixed(1)}`).join(' L'); return `M0 ${bottom} L${line} L${W} ${bottom} Z`; } /** A tree crown: overlapping blobs, darker below, lit on one side. */ function Crown({ x, y, r, dark, light, seed, }: { x: number; y: number; r: number; dark: string; light: string; seed: number; }) { const rand = random(seed); // Painted in three passes, like a brush would: a dark mass, a mid tone lifted up and to the // left (where the light comes from), then small bright dabs, each blob a slightly squashed oval. const blobs = Array.from({ length: 11 }, (_, i) => { const angle = (i / 11) * Math.PI * 2 + rand() * 0.8; const dist = 0.35 + rand() * 0.3; return { cx: q(x + Math.cos(angle) * r * dist), cy: q(y + Math.sin(angle) * r * dist * 0.72), r: q(r * (0.34 + rand() * 0.2)), }; }); const dabs = Array.from({ length: 16 }, () => { const angle = Math.PI * (0.9 + rand() * 1.1); const dist = rand() * 0.75; return { cx: q(x + Math.cos(angle) * r * dist), cy: q(y + Math.sin(angle) * r * dist * 0.7), r: q(r * (0.07 + rand() * 0.09)), tilt: q(rand() * 60 - 30), }; }); return ( {blobs.map((b, i) => ( ))} {blobs.slice(0, 7).map((b, i) => ( ))} {dabs.map((d, i) => ( ))} {blobs.slice(7).map((b, i) => ( ))} ); } /** Grass: short strokes scattered along a band, lighter tips catching the light. */ function Grass({ y0, y1, color, seed, count = 70, }: { y0: number; y1: number; color: string; seed: number; count?: number; }) { const rand = random(seed); const d = Array.from({ length: count }, () => { const x = rand() * W; const y = y0 + rand() * (y1 - y0); const h = 1.5 + ((y - y0) / Math.max(1, y1 - y0)) * 4 + rand() * 2; const lean = rand() * 2 - 1; return `M${x.toFixed(1)} ${y.toFixed(1)} l${lean.toFixed(1)} ${(-h).toFixed(1)}`; }).join(' '); return ; } function Tree({ x, base, h, r, trunk, dark, light, seed, }: { x: number; base: number; h: number; r: number; trunk: string; dark: string; light: string; seed: number; }) { return ( ); } function Pine({ x, base, h, fill, snow, }: { x: number; base: number; h: number; fill: string; snow?: string; }) { const w = h * 0.36; return ( {snow && ( )} ); } function Palm({ x, base, h, lean, fill, }: { x: number; base: number; h: number; lean: number; fill: string; }) { const tx = x + lean; const ty = base - h; const fronds = [-150, -115, -70, -35, -5, 30, -185].map((deg) => { const a = (deg * Math.PI) / 180; const ex = q(tx + Math.cos(a) * h * 0.42); const ey = q(ty + Math.sin(a) * h * 0.2 + h * 0.12); const mx = q(tx + Math.cos(a) * h * 0.22); const my = q(ty + Math.sin(a) * h * 0.22 - 3); return `M${tx} ${ty} Q${mx} ${my - 4} ${ex} ${ey} Q${mx} ${my + 2} ${tx} ${ty + 2} Z`; }); return ( {fronds.map((d, i) => ( ))} ); } function Pillar({ x, base, h, w, stone, shade, }: { x: number; base: number; h: number; w: number; stone: string; shade: string; }) { return ( ); } /** Builds a scene's gradient ids from the instance's own prefix. */ type Paint = (id: string) => ReactNode; const SCENES: Record = { colonnade: { defs: (id) => ( <> ), art: (id) => ( <> {[18, 52, 92, 214, 254, 292].map((x, i) => ( ))} ), }, 'birch-lake': { defs: (id) => ( <> ), art: (id) => ( <> {[ [36, 4, 150], [56, -3, 170], [262, 3, 140], [292, -2, 160], ].map(([x, lean, base], i) => ( {[0.2, 0.4, 0.6, 0.8].map((t) => ( ))} ))} ), }, 'standing-stones': { defs: (id) => ( <> ), art: (id) => ( <> {[ [120, 108, 14, 26], [146, 104, 10, 34], [180, 110, 16, 22], [208, 104, 12, 30], [236, 112, 10, 18], ].map(([x, base, w, h], i) => ( ))} ), }, 'palm-cove': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'canyon-dawn': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'lone-oak': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'deep-wood': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'hill-fort': { defs: (id) => ( <> ), art: (id) => ( <> {Array.from({ length: 11 }, (_, i) => ( ))} {[0, 1, 2, 3, 4].map((row) => ( ))} {[0, 1, 2, 3].map((i) => ( ))} ), }, 'still-pond': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'old-plaza': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'stone-gate': { defs: (id) => ( <> ), art: (id) => ( <> ), }, 'night-peaks': { defs: (id) => ( <> ), art: (id) => ( <> {Array.from({ length: 34 }, (_, i) => { const rand = random(i + 120); return ( ); })} {[30, 48, 270, 292].map((x, i) => ( ))} ), }, 'mesa-dusk': { defs: (id) => ( <> ), art: (id) => ( <> {[20, 30, 270, 290, 300].map((x, i) => ( ))} ), }, 'snow-dawn': { defs: (id) => ( <> ), art: (id) => ( <> {[210, 228, 246, 262, 284, 300, 24, 40].map((x, i) => ( ))} ), }, 'sea-cliffs': { defs: (id) => ( <> ), art: (id) => ( <> {[104, 118, 134, 150].map((y, i) => ( ))} ), }, }; function Sky({ id, top, bottom }: { id: string; top: string; bottom: string }) { return ( ); } function Sun({ id, color }: { id: string; color: string }) { return ( ); } /** The aerial haze: a band of the horizon's colour that fades upward, over the far layers. */ function Haze({ id, color }: { id: string; color: string }) { return ( ); } function Cloud({ x, y, s, tint = '#ffffff' }: { x: number; y: number; s: number; tint?: string }) { return ( ); } /** One picture, filling its box (sliced to cover it). */ export function Scene({ scene, className }: { scene: SceneId; className?: string }) { const id = useId().replace(/:/g, ''); const paint = SCENES[scene] ?? SCENES.colonnade; return ( ); } ``` ### photo-album/glyphs.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. /* * The album's small drawings: the controller prompts (a round face button, a shoulder keycap), the * page arrow, the photo badge, the heart and the alert dot, the viewfinder's corners, and the * tablet's bezel (its riveted rail and its corner medallions). All are flat vector shapes in * currentColor or the bezel's own tokens, aria-hidden: the words around them carry the meaning. */ /** A face button: a filled disc with its letter knocked out in the plate's ink. */ export function FaceGlyph({ letter }: { letter: string }) { return ( ); } /** A shoulder button: a keycap with a slanted top edge, its letter knocked out. */ export function KeyCap({ letter, side }: { letter: string; side: 'left' | 'right' }) { const d = side === 'left' ? 'M4 2 H34 Q38 2 38 6 V22 Q38 26 34 26 H4 Q0 26 0 22 V9 Q0 2 4 2 Z' : 'M4 2 H34 Q38 2 38 9 V22 Q38 26 34 26 H4 Q0 26 0 22 V6 Q0 2 4 2 Z'; return ( ); } /** The page arrow: a tall chevron, pointing right (mirrored by CSS for the left one). */ export function PageArrow() { return ( ); } /** The badge in a picture's corner: a small framed square with a horizon line. */ export function PhotoBadge() { return ( ); } export function Heart() { return ( ); } export function AlertDot() { return ( ); } /** The viewfinder: four corner brackets and a centre cross. */ export function Reticle() { return ( ); } /** The selection frame: a chamfered outline with a wide soft stroke under a sharp one. */ export function SelectFrame() { const d = 'M7 1 H193 L199 7 V107 L193 113 H7 L1 107 V7 Z'; return ( ); } /** * A corner medallion of the bezel, drawn for the top-left corner (mirrored by CSS for the * others): a ringed boss with a stud, from which a stepped arm runs along each edge, ending in a * notched block. Sand-coloured relief with a dark outline and a light upper edge. */ export function Medallion() { return ( ); } ``` ### photo-album/photo-album.module.css ```css /* Photo album (photo-album.tsx): a handheld tablet's album page, on its own, centred on the lab's plain stage. The tablet brings its own surface: a dark ornamented bezel around a navy screen with a cyan glow, so it reads the same on a white page and a black one; only its shadow and halo on the page follow the colour scheme. Every length is a multiple of --u: 1 px when the stage gives the tablet its 960 px, less on a narrower stage. Under 640 px the tablet turns into a 480-unit portrait layout with a 3 × 4 grid, so the pictures and words stay legible on a phone. Crispness: the pictures, the bezel's rail and medallions, the glyphs and the screen's pattern are all vector (inline SVG or SVG data URIs); glows are box- and text-shadows behind sharp shapes. Motion: the selection frame moves by a transition on translate; page slides, the viewer's swaps, the dialog's pop, the flash and the ping are keyframes; the FLIPs (open, close, save) are Web Animations set from the script. Reduced motion turns them all off. */ .root { /* The bezel. */ --band: #1b1a18; --band-hi: #2a2826; --relief: #b09872; --relief-dark: #3a2d20; --relief-light: #ecdcb4; /* The screen. */ --screen: #1c1f37; --screen-deep: #12152b; --edge-glow: #0a4fd0; --edge-glow-soft: rgb(16 96 230 / 0.55); /* Words, glyphs and frames on the screen. */ --cyan: #36b5ee; --cyan-hi: #7fd8ff; --title: #63c9f3; --select: #a8eaff; --glow: #2cc4ff; --frame: #cfdae3; --frame-dark: #20294a; --ink: #102038; --button: rgb(14 14 13 / 0.9); --button-edge: #575a5c; --heart: #ea2d36; /* The tablet on the page. */ --shade: rgb(16 22 40 / 0.3); --halo: rgb(56 176 255 / 0.32); --focus: #2f6fdf; position: relative; container-type: inline-size; isolation: isolate; display: grid; place-items: center; width: 100%; min-height: 400px; padding: 24px 0; box-sizing: border-box; font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; -webkit-tap-highlight-color: transparent; } @supports (color: light-dark(#fff, #000)) { .root { --shade: light-dark(rgb(16 22 40 / 0.3), rgb(0 0 0 / 0.6)); --halo: light-dark(rgb(56 176 255 / 0.32), rgb(56 176 255 / 0.4)); --focus: light-dark(#2f6fdf, #8db4ff); } } .root[data-color-scheme='light'] { color-scheme: light; } .root[data-color-scheme='dark'] { color-scheme: dark; } .root[data-color-scheme='system'] { color-scheme: light dark; } .root *, .root *::before, .root *::after { box-sizing: border-box; } .root svg { display: block; } /* ─── The tablet ─────────────────────────────────────────────────────────────────────────── */ .tablet { --u: min(1px, 100cqi / 960); /* The design's sizes, in units. */ --tw: 960; --th: 540; --band-h: 22; --bar-h: 24; --side: 8; --cols: 4; --rows: 3; --pw: 168; --ph: 93; --gx: 28; --gy: 37; position: relative; width: calc(var(--tw) * var(--u)); height: calc(var(--th) * var(--u)); border-radius: calc(20 * var(--u)); background: linear-gradient( 180deg, var(--band-hi), var(--band) 12%, var(--band) 88%, var(--band-hi) ); box-shadow: 0 0 0 calc(1 * var(--u)) #000, 0 calc(2 * var(--u)) calc(6 * var(--u)) var(--shade), 0 calc(18 * var(--u)) calc(40 * var(--u)) var(--shade), 0 0 calc(28 * var(--u)) var(--halo); outline: none; user-select: none; -webkit-user-select: none; } .tablet:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; } /* The riveted rails along the top and bottom of the bezel: one vector tile, repeated. */ .rail { position: absolute; left: calc(40 * var(--u)); right: calc(40 * var(--u)); height: calc(var(--band-h) * var(--u)); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 22'%3E%3Cg fill='%23b09872' stroke='%233a2d20' stroke-width='1.2' stroke-linejoin='round'%3E%3Crect x='-1' y='4' width='50' height='3.4'/%3E%3Crect x='-1' y='14.6' width='50' height='3.4'/%3E%3Cpath d='M12 5.2 L18 11 L12 16.8 L6 11 Z'/%3E%3Crect x='29' y='7.4' width='3.2' height='7.2'/%3E%3Crect x='36' y='7.4' width='3.2' height='7.2'/%3E%3C/g%3E%3Cg fill='none' stroke='%23ecdcb4' stroke-width='0.8' opacity='0.75'%3E%3Cpath d='M0 4.9 H48 M0 15.5 H48'/%3E%3Cpath d='M9.6 8.6 L12 6.6 L14.4 8.6'/%3E%3C/g%3E%3Ccircle cx='12' cy='11' r='1.5' fill='%233a2d20'/%3E%3C/svg%3E"); background-size: calc(48 * var(--u)) 100%; background-repeat: repeat-x; pointer-events: none; } .rail[data-side='top'] { top: 0; } .rail[data-side='bottom'] { bottom: 0; transform: scaleY(-1); } /* The four corner medallions, drawn for the top-left corner and mirrored for the others. */ .medallion { position: absolute; z-index: 3; width: calc(112 * var(--u)); height: calc(112 * var(--u)); pointer-events: none; filter: drop-shadow(0 calc(2 * var(--u)) calc(2 * var(--u)) rgb(0 0 0 / 0.55)); } .medallion svg { width: 100%; height: 100%; } .medallion[data-at='tl'] { top: 0; left: 0; } .medallion[data-at='tr'] { top: 0; right: 0; transform: scaleX(-1); } .medallion[data-at='bl'] { bottom: 0; left: 0; transform: scaleY(-1); } .medallion[data-at='br'] { right: 0; bottom: 0; transform: scale(-1, -1); } /* The header (shoulder tabs and the page's name) and the footer (button prompts), on the bezel. */ .header, .hints { position: absolute; z-index: 2; left: calc(120 * var(--u)); right: calc(120 * var(--u)); height: calc(var(--bar-h) * var(--u)); display: flex; align-items: center; } .header { top: calc(var(--band-h) * var(--u)); justify-content: center; gap: calc(100 * var(--u)); } .hints { bottom: calc(var(--band-h) * var(--u)); justify-content: flex-end; gap: calc(28 * var(--u)); right: calc(98 * var(--u)); } .title { margin: 0; min-width: calc(120 * var(--u)); color: var(--title); font-size: calc(17 * var(--u)); font-weight: 400; line-height: 1; text-align: center; letter-spacing: 0.01em; } .tab, .hint { display: inline-flex; align-items: center; gap: calc(6 * var(--u)); margin: 0; padding: calc(2 * var(--u)) calc(4 * var(--u)); border: 0; border-radius: calc(4 * var(--u)); background: none; color: var(--cyan); font: inherit; font-size: calc(14 * var(--u)); font-style: italic; font-weight: 600; line-height: 1; cursor: pointer; touch-action: manipulation; } .tab { min-width: calc(150 * var(--u)); } .tab[data-side='left'] { justify-content: flex-end; } .tab svg { width: calc(20 * var(--u)); height: calc(15 * var(--u)); color: var(--cyan); } .hint { font-size: calc(13 * var(--u)); } .hint svg { width: calc(15 * var(--u)); height: calc(15 * var(--u)); color: var(--cyan); } .tab:hover, .hint:hover { color: var(--cyan-hi); } .tab:focus-visible, .hint:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; } .hearts { position: absolute; left: calc(-68 * var(--u)); top: 50%; display: flex; gap: calc(1.5 * var(--u)); translate: 0 -50%; color: var(--heart); } .hearts svg { width: calc(15 * var(--u)); height: calc(13 * var(--u)); filter: drop-shadow(0 0 calc(1 * var(--u)) rgb(0 0 0 / 0.8)); } /* ─── The screen ─────────────────────────────────────────────────────────────────────────── */ .screen { position: absolute; inset: calc((var(--band-h) + var(--bar-h)) * var(--u)) calc(var(--side) * var(--u)); overflow: hidden; overflow: clip; z-index: 0; isolation: isolate; border-radius: calc(3 * var(--u)); /* A faint contour pattern, like a map's relief, over the navy. */ background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 160 160'%3E%3Cg fill='none' stroke='%23b8c6ff' stroke-opacity='0.055' stroke-width='2.2'%3E%3Cpath d='M-10 40 C20 10 60 20 80 44 S130 70 170 40'/%3E%3Cpath d='M-10 58 C24 30 58 40 80 62 S132 92 170 58'/%3E%3Cpath d='M-10 120 C30 96 60 150 100 124 S150 100 170 120'/%3E%3Cpath d='M-10 138 C30 114 62 168 100 142 S150 118 170 138'/%3E%3Cellipse cx='124' cy='92' rx='14' ry='8'/%3E%3Cellipse cx='30' cy='88' rx='9' ry='5'/%3E%3C/g%3E%3C/svg%3E") 0 0 / calc(160 * var(--u)) calc(160 * var(--u)), radial-gradient(120% 90% at 50% 50%, var(--screen) 55%, var(--screen-deep)); box-shadow: inset 0 0 0 calc(1 * var(--u)) rgb(0 0 0 / 0.6); } /* The cyan-blue glow along the screen's edge, above everything on it. */ .screen::after { content: ''; position: absolute; inset: 0; z-index: 5; pointer-events: none; box-shadow: inset 0 0 0 calc(2 * var(--u)) var(--edge-glow), inset 0 0 calc(10 * var(--u)) calc(3 * var(--u)) var(--edge-glow), inset 0 0 calc(40 * var(--u)) calc(10 * var(--u)) var(--edge-glow-soft); } .album, .viewer, .camera { position: absolute; inset: 0; } .album { transition: opacity 220ms ease, visibility 0s linear 0s; } .tablet:not([data-view='album']) .album { opacity: 0; visibility: hidden; transition: opacity 160ms ease, visibility 0s linear 160ms; } .tablet[data-arriving] .album { transition: none; } .tablet[data-view='photo'] .album { visibility: visible; opacity: 0.18; } /* The grid: twelve slots of a fixed size, centred; the selection and arrows are laid over it. */ .gridWrap { position: absolute; left: 50%; top: 50%; width: calc((var(--cols) * var(--pw) + (var(--cols) - 1) * var(--gx)) * var(--u)); height: calc((var(--rows) * var(--ph) + (var(--rows) - 1) * var(--gy)) * var(--u)); translate: -50% -50%; } .grid { display: grid; grid-template-columns: repeat(var(--cols), calc(var(--pw) * var(--u))); grid-auto-rows: calc(var(--ph) * var(--u)); gap: calc(var(--gy) * var(--u)) calc(var(--gx) * var(--u)); margin: 0; padding: 0; list-style: none; outline: none; animation: pageIn 300ms cubic-bezier(0.2, 0.8, 0.3, 1) both; } .grid[data-dir='-1'] { --from: -1; } .grid:focus-visible { outline: 2px solid var(--focus); outline-offset: calc(8 * var(--u)); border-radius: calc(4 * var(--u)); } @keyframes pageIn { from { opacity: 0; transform: translateX(calc(var(--from, 1) * 60 * var(--u))); } } .slot, .empty { position: relative; /* The frame: a light outer line, a dark gap, a light inner line round the picture. */ padding: calc(3 * var(--u)); border: calc(1.2 * var(--u)) solid var(--frame); background: var(--frame-dark); } .slot { cursor: pointer; transform-origin: 0 0; transition: scale 160ms ease; } .slot > .photo { transition: scale 200ms cubic-bezier(0.3, 1.4, 0.5, 1); } .slot[data-selected] > .photo { scale: 1.035; } /* The frame's corner marks: small squares that stand out of each corner. */ .slot::before, .slot::after, .empty::before { content: ''; position: absolute; inset: calc(-4.5 * var(--u)); pointer-events: none; background: linear-gradient(var(--frame), var(--frame)) 0 0 / calc(7 * var(--u)) calc(1.4 * var(--u)), linear-gradient(var(--frame), var(--frame)) 0 0 / calc(1.4 * var(--u)) calc(7 * var(--u)), linear-gradient(var(--frame), var(--frame)) 100% 0 / calc(7 * var(--u)) calc(1.4 * var(--u)), linear-gradient(var(--frame), var(--frame)) 100% 0 / calc(1.4 * var(--u)) calc(7 * var(--u)), linear-gradient(var(--frame), var(--frame)) 0 100% / calc(7 * var(--u)) calc(1.4 * var(--u)), linear-gradient(var(--frame), var(--frame)) 0 100% / calc(1.4 * var(--u)) calc(7 * var(--u)), linear-gradient(var(--frame), var(--frame)) 100% 100% / calc(7 * var(--u)) calc(1.4 * var(--u)), linear-gradient(var(--frame), var(--frame)) 100% 100% / calc(1.4 * var(--u)) calc(7 * var(--u)); background-repeat: no-repeat; } .slot::after { inset: calc(-1.2 * var(--u)); background: none; border: calc(2 * var(--u)) solid var(--glow); opacity: 0; } .slot[data-ping]::after { animation: ping 700ms cubic-bezier(0.2, 0.7, 0.3, 1); } @keyframes ping { 0% { opacity: 1; scale: 1; } 100% { opacity: 0; scale: 1.18 1.3; } } .empty { opacity: 0.35; background: transparent; border-style: dashed; } .photo { position: relative; display: block; width: 100%; height: 100%; overflow: hidden; outline: calc(1.2 * var(--u)) solid #e9eff4; background: #000; } .photo svg, .peekPhoto svg, .viewerArt svg, .live svg, .shot svg { width: 100%; height: 100%; } .mirrored { transform: scaleX(-1); } .badge { position: absolute; right: calc(3 * var(--u)); bottom: calc(3 * var(--u)); color: #dbe8f2; } .badge svg { width: calc(10 * var(--u)); height: calc(10 * var(--u)); } /* The selection: one chamfered cyan frame, moved from slot to slot. */ .selection { position: absolute; left: calc(-7 * var(--u)); top: calc(-7 * var(--u)); width: calc((var(--pw) + 14) * var(--u)); height: calc((var(--ph) + 14) * var(--u)); pointer-events: none; translate: calc(var(--col) * (var(--pw) + var(--gx)) * var(--u)) calc(var(--row) * (var(--ph) + var(--gy)) * var(--u)); transition: translate 170ms cubic-bezier(0.3, 1.35, 0.5, 1); filter: drop-shadow(0 0 calc(5 * var(--u)) var(--glow)); } .selection svg { width: 100%; height: 100%; animation: breathe 1.6s ease-in-out infinite; } @keyframes breathe { 50% { opacity: 0.78; } } /* The page arrows, beside the grid; the right one bobs while there is a next page. */ .pageArrow, .viewerArrow { position: absolute; top: 50%; display: grid; place-items: center; width: calc(28 * var(--u)); height: calc(56 * var(--u)); margin: 0; padding: 0; border: 0; border-radius: calc(4 * var(--u)); background: none; color: var(--glow); cursor: pointer; translate: 0 -50%; filter: drop-shadow(0 0 calc(4 * var(--u)) rgb(44 196 255 / 0.7)); } .pageArrow[hidden], .viewerArrow[hidden] { display: none; } .pageArrow svg, .viewerArrow svg { width: calc(17 * var(--u)); height: calc(40 * var(--u)); animation: bob 1.4s ease-in-out infinite; } .pageArrow[data-side='right'] { right: calc(-30 * var(--u)); } .pageArrow[data-side='left'] { left: calc(-30 * var(--u)); } .pageArrow[data-side='left'] svg, .viewerArrow[data-side='left'] svg { rotate: 180deg; --bob: -1; } @keyframes bob { 50% { transform: translateX(calc(var(--bob, 1) * 4 * var(--u))); } } .pageArrow:hover, .viewerArrow:hover { color: var(--cyan-hi); } .pageArrow:focus-visible, .viewerArrow:focus-visible { outline: 2px solid var(--focus); } /* The peek: the neighbouring page's nearest column, cut by the screen's edge and faded. */ .peek { position: absolute; top: 50%; display: grid; grid-auto-rows: calc(var(--ph) * var(--u)); gap: calc(var(--gy) * var(--u)); width: calc(var(--pw) * var(--u)); translate: 0 -50%; opacity: 0.32; pointer-events: none; } .peek[data-side='right'] { left: calc(50% + ((var(--cols) * var(--pw) + (var(--cols) - 1) * var(--gx)) / 2 + 33) * var(--u)); mask-image: linear-gradient(90deg, #000, transparent 45%); } .peek[data-side='left'] { right: calc( 50% + ((var(--cols) * var(--pw) + (var(--cols) - 1) * var(--gx)) / 2 + 33) * var(--u) ); mask-image: linear-gradient(270deg, #000, transparent 45%); } .peekPhoto { display: block; padding: calc(3 * var(--u)); border: calc(1.2 * var(--u)) solid var(--frame); background: var(--frame-dark); } /* ─── The large view ─────────────────────────────────────────────────────────────────────── */ .viewer { display: grid; place-content: center; justify-items: center; gap: calc(10 * var(--u)); animation: fadeIn 200ms ease both; } .viewerTitle { display: flex; align-items: baseline; gap: calc(10 * var(--u)); margin: 0; color: var(--title); font-size: calc(15 * var(--u)); font-style: italic; font-weight: 600; line-height: 1.2; } .viewerNo { color: var(--cyan); font-size: calc(12 * var(--u)); opacity: 0.85; } .viewerPhoto { position: relative; width: calc(var(--vw, 540) * var(--u)); aspect-ratio: 16 / 9; padding: calc(4 * var(--u)); border: calc(1.4 * var(--u)) solid var(--frame); background: var(--frame-dark); transform-origin: 0 0; box-shadow: 0 0 calc(18 * var(--u)) rgb(44 196 255 / 0.35); } .viewerArt { width: 100%; height: 100%; overflow: hidden; outline: calc(1.2 * var(--u)) solid #e9eff4; animation: swap 240ms cubic-bezier(0.2, 0.8, 0.3, 1) both; } .viewerArt[data-dir='-1'] { --from: -1; } @keyframes swap { from { opacity: 0.2; transform: translateX(calc(var(--from, 1) * 24 * var(--u))); } } .viewerPlace { margin: 0; color: var(--cyan); font-size: calc(13 * var(--u)); font-style: italic; font-weight: 600; } .viewerArrow[data-side='left'] { left: calc(50% - (var(--vw, 540) / 2 + 52) * var(--u)); } .viewerArrow[data-side='right'] { right: calc(50% - (var(--vw, 540) / 2 + 52) * var(--u)); } @keyframes fadeIn { from { opacity: 0; } } /* ─── The camera ─────────────────────────────────────────────────────────────────────────── */ .camera { animation: fadeIn 200ms ease both; } .live { position: absolute; inset: 0; overflow: hidden; } /* The live view drifts a little, as a held camera does. */ .live svg { animation: drift 7s ease-in-out infinite alternate; } @keyframes drift { from { transform: scale(1.06) translate(-1%, 0.5%); } to { transform: scale(1.06) translate(1%, -0.5%); } } .live > svg.mirrored { animation: none; transform: scaleX(-1) scale(1.06); } /* With the dialog up, the live view darkens behind it. */ .live::after { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 50% 50%, rgb(6 8 16 / 0.35), rgb(6 8 16 / 0.6)); opacity: 0; transition: opacity 240ms ease; } .camera[data-confirm] .live::after { opacity: 1; } .camera[data-confirm] .live svg { animation-play-state: paused; } .reticle { position: absolute; left: 50%; top: 50%; width: calc(240 * var(--u)); height: calc(160 * var(--u)); translate: -50% -50%; color: #fff; filter: drop-shadow(0 0 calc(2 * var(--u)) rgb(0 0 0 / 0.6)); animation: aim 1.8s ease-in-out infinite; } .reticle svg { width: 100%; height: 100%; } @keyframes aim { 50% { scale: 0.96; opacity: 0.8; } } /* The save dialog. */ .dialog { position: absolute; inset: 0; display: grid; grid-template-rows: auto auto auto; place-content: center; justify-items: center; animation: pop 320ms cubic-bezier(0.2, 1.3, 0.4, 1) both; } @keyframes pop { from { opacity: 0; scale: 0.94; } } .ask { margin: 0 0 calc(17 * var(--u)); color: var(--title); font-size: calc(15 * var(--u)); font-style: italic; font-weight: 600; line-height: 1.2; text-shadow: 0 0 calc(6 * var(--u)) rgb(0 0 0 / 0.7); } .shot { position: relative; width: calc(var(--sw, 508) * var(--u)); aspect-ratio: 508 / 300; border: calc(1.4 * var(--u)) solid #3d8fc8; background: #000; transform-origin: 0 0; box-shadow: 0 0 calc(10 * var(--u)) rgb(20 120 220 / 0.45); } .shot > svg { position: absolute; inset: 0; } /* The tablet's screen look: a faint cyan wash and fine vertical scan lines. */ .scan { position: absolute; inset: 0; background: repeating-linear-gradient( 90deg, rgb(150 220 255 / 0.09) 0 calc(1 * var(--u)), transparent calc(1 * var(--u)) calc(4 * var(--u)) ), linear-gradient(rgb(60 170 255 / 0.07), rgb(60 170 255 / 0.07)); pointer-events: none; } .place { position: absolute; left: calc(8 * var(--u)); top: calc(8 * var(--u)); display: flex; align-items: center; gap: calc(4 * var(--u)); color: var(--cyan); font-size: calc(13 * var(--u)); font-weight: 500; line-height: 1; text-shadow: 0 0 calc(2 * var(--u)) rgb(0 0 0 / 0.9), 0 0 calc(6 * var(--u)) rgb(0 0 0 / 0.5); } .place svg { width: calc(14 * var(--u)); height: calc(14 * var(--u)); } .tick { position: absolute; width: calc(6 * var(--u)); height: calc(6 * var(--u)); background: #4aa2dc; } .tick[data-at='tl'] { left: calc(-3.5 * var(--u)); top: calc(-3.5 * var(--u)); } .tick[data-at='tr'] { right: calc(-3.5 * var(--u)); top: calc(-3.5 * var(--u)); } .tick[data-at='bl'] { left: calc(-3.5 * var(--u)); bottom: calc(-3.5 * var(--u)); } .tick[data-at='br'] { right: calc(-3.5 * var(--u)); bottom: calc(-3.5 * var(--u)); } .choices { display: flex; justify-content: center; gap: calc(var(--cg, 52) * var(--u)); margin-top: calc(28 * var(--u)); } .choice { position: relative; width: calc(var(--bw, 208) * var(--u)); height: calc(30 * var(--u)); margin: 0; padding: 0; border: calc(1 * var(--u)) solid var(--button-edge); border-radius: calc(1 * var(--u)); background: var(--button); color: var(--cyan); font: inherit; font-size: calc(14 * var(--u)); font-style: italic; font-weight: 600; cursor: pointer; outline: none; transition: color 140ms ease, scale 160ms cubic-bezier(0.3, 1.5, 0.5, 1); } /* The selected button: a bright chamfered outline with a glow, drawn on a pseudo-element. */ .choice::before { content: ''; position: absolute; inset: calc(-3 * var(--u)); border: calc(2.4 * var(--u)) solid var(--select); border-radius: calc(3 * var(--u)); clip-path: polygon( calc(6 * var(--u)) 0, calc(100% - 6 * var(--u)) 0, 100% calc(6 * var(--u)), 100% calc(100% - 6 * var(--u)), calc(100% - 6 * var(--u)) 100%, calc(6 * var(--u)) 100%, 0 calc(100% - 6 * var(--u)), 0 calc(6 * var(--u)) ); opacity: 0; transition: opacity 140ms ease; } .choice::after { content: ''; position: absolute; inset: calc(-4 * var(--u)); border-radius: calc(5 * var(--u)); box-shadow: 0 0 calc(8 * var(--u)) calc(1 * var(--u)) var(--glow), inset 0 0 calc(6 * var(--u)) rgb(44 196 255 / 0.5); opacity: 0; transition: opacity 140ms ease; pointer-events: none; } .choice[data-selected] { color: var(--cyan-hi); border-color: transparent; scale: 1.02; } .choice[data-selected]::before, .choice[data-selected]::after { opacity: 1; } .choice[data-selected]::after { animation: breathe 1.6s ease-in-out infinite; } .choice:focus-visible { outline: 2px solid var(--focus); outline-offset: calc(6 * var(--u)); } /* The shutter: a white flash with a blink of black bands. */ .flash { position: absolute; inset: 0; z-index: 6; pointer-events: none; opacity: 0; } .flash[data-on] { animation: flash 520ms ease-out both; background: linear-gradient(#000, #000) top / 100% 0 no-repeat, linear-gradient(#000, #000) bottom / 100% 0 no-repeat, #fff; } @keyframes flash { 0% { opacity: 0; background-size: 100% 0, 100% 0, auto; } 10% { opacity: 1; background-size: 100% 50%, 100% 50%, auto; } 22% { opacity: 1; background-size: 100% 0, 100% 0, auto; } 100% { opacity: 0; background-size: 100% 0, 100% 0, auto; } } .said { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } /* ─── A narrow stage: a portrait tablet with a 3 × 4 grid ───────────────────────────────── */ @container (max-width: 639px) { .tablet { --u: min(1px, 100cqi / 480); --tw: 480; --th: 590; --cols: 3; --rows: 4; --pw: 124; --ph: 70; --gx: 16; --gy: 24; --vw: 400; --sw: 420; --bw: 180; --cg: 22; } .medallion { width: calc(84 * var(--u)); height: calc(84 * var(--u)); } .rail { left: calc(30 * var(--u)); right: calc(30 * var(--u)); } .header, .hints { left: calc(64 * var(--u)); right: calc(64 * var(--u)); } .header { gap: calc(14 * var(--u)); } .tab { min-width: 0; } .title { min-width: 0; } .hearts { left: calc(-14 * var(--u)); } .hearts svg { width: calc(10 * var(--u)); height: calc(9 * var(--u)); } .hints { right: calc(64 * var(--u)); gap: calc(16 * var(--u)); } .pageArrow[data-side='right'] { right: calc(-34 * var(--u)); } .pageArrow[data-side='left'] { left: calc(-34 * var(--u)); } .pageArrow svg { width: calc(12 * var(--u)); height: calc(30 * var(--u)); } .viewerArrow { top: auto; bottom: calc(26 * var(--u)); } .viewerArrow[data-side='left'] { left: calc(110 * var(--u)); } .viewerArrow[data-side='right'] { right: calc(110 * var(--u)); } } /* ─── Paused offscreen, still under reduced motion ──────────────────────────────────────── */ .root[data-paused] .selection svg, .root[data-paused] .pageArrow svg, .root[data-paused] .viewerArrow svg, .root[data-paused] .reticle, .root[data-paused] .live svg, .root[data-paused] .choice::after { animation-play-state: paused; } @media (prefers-reduced-motion: reduce) { .root *, .root *::before, .root *::after { animation: none !important; transition: none !important; } } ``` ### photo-album/use-autoplay.ts ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useCallback, useEffect, useRef, useState } from 'react'; /* * When a demo may play on its own: while part of it is on screen and the tab is visible, never * under reduced motion, and not while the reader is using it. `take()` hands it to the reader; it * takes back over `idle` ms after their last input. */ export function useAutoplay(idle = 6000) { const ref = useRef(null); const [visible, setVisible] = useState(false); const [reduced, setReduced] = useState(true); const [taken, setTaken] = useState(false); const timer = useRef(0); useEffect(() => { const element = ref.current; if (!element) return; let onScreen = false; const update = () => setVisible(onScreen && !document.hidden); const observer = new IntersectionObserver( ([entry]) => { onScreen = entry.isIntersecting; update(); }, { threshold: 0.3 }, ); observer.observe(element); document.addEventListener('visibilitychange', update); const motion = window.matchMedia('(prefers-reduced-motion: reduce)'); const readMotion = () => setReduced(motion.matches); readMotion(); motion.addEventListener('change', readMotion); return () => { observer.disconnect(); document.removeEventListener('visibilitychange', update); motion.removeEventListener('change', readMotion); }; }, []); const take = useCallback(() => { setTaken(true); window.clearTimeout(timer.current); timer.current = window.setTimeout(() => setTaken(false), idle); }, [idle]); useEffect(() => () => window.clearTimeout(timer.current), []); return { ref, take, visible, reduced, playing: visible && !reduced && !taken }; } ```