<span className={styles.hidden}>, {item.status}</span> <span className={styles.slot} aria-hidden="true"> <span className={styles.pill} data-part="pill" data-tone="now" data-shown=""> <span className={styles.dot} data-part="dot"> <span className={styles.ripple} /> <span className={styles.core} /> </span> {item.status} </span> </span> </div> ); } function TaskRow({ item, done, onChange, boxRef }: RowProps<'task'>) { const due = useRef<HTMLSpanElement>(null); const finished = useRef<HTMLSpanElement>(null); useOnChange(done, () => { const [from, to] = done ? [due.current, finished.current] : [finished.current, due.current]; if (from && to) morph(from, to); }); return ( <label className={styles.row} data-part="row" data-kind="task" data-done={done || undefined}> <input type="checkbox" className={styles.input} checked={done} onChange={(event) => onChange(event.target.checked)} /> <Box dashed={false} boxRef={boxRef} /> <Title text={item.title} /> <span className={styles.hidden}>{done ? ', done' : `, due ${item.due}`}</span> <span className={styles.slot} aria-hidden="true"> <span ref={due} className={styles.pill} data-part="pill" data-tone="due" data-shown={!done || undefined} > <span className={styles.lines}> <span className={styles.line} /> <span className={styles.line} /> <span className={styles.line} /> </span> <span className={styles.clock} data-part="clock"> <ClockFace className={styles.face} /> <span className={`${styles.hand} ${styles.hour}`} /> <span className={`${styles.hand} ${styles.minute}`} /> </span> <span>{item.due}</span> </span> <span ref={finished} className={styles.pill} data-part="pill" data-tone="done" data-shown={done || undefined} > <span className={styles.mark} data-icon=""> <DoneGlyph className={styles.face} /> </span> <span>Done</span> </span> </span> </label> ); } function HabitRow({ item, done, onChange, boxRef }: RowProps<'habit'>) { const count = item.streak + (done ? 1 : 0); // The number on show, and the one rolling out of view as it changes. const [shown, setShown] = useState(count); const [leaving, setLeaving] = useState<number | null>(null); if (shown !== count) { setLeaving(shown); setShown(count); } const pill = useRef<HTMLSpanElement>(null); const flame = useRef<HTMLSpanElement>(null); useEffect(() => { if (leaving === null) return; const timer = window.setTimeout(() => setLeaving(null), 600); return () => window.clearTimeout(timer); }, [leaving]); useOnChange(done, () => { if (!done || !pill.current || !flame.current) return; pill.current.animate( [ { transform: 'scale(1)' }, { transform: 'scale(1.08)', offset: 0.3 }, { transform: 'scale(1)' }, ], { duration: 480, easing: 'ease-out' }, ); // The flame flares up as the sparks fly. flame.current.animate( [ { transform: 'scale(1)' }, { transform: 'scale(1.22)', offset: 0.25 }, { transform: 'scale(1)' }, ], { duration: 520, easing: 'ease-out' }, ); // The burst: each spark flies out along its angle, shrinking and fading. const unit = unitOf(flame.current); flame.current.querySelectorAll<HTMLElement>('[data-burst]').forEach((spark, i) => { const { angle, reach } = BURST[i]; const radians = (angle * Math.PI) / 180; const x = Math.sin(radians) * reach * unit; const y = -Math.cos(radians) * reach * unit; spark.animate( [ { transform: 'translate(0, 0) scale(1)', opacity: 1 }, { transform: `translate(${x}px, ${y}px) scale(0.2)`, opacity: 0 }, ], { duration: 560 + i * 30, easing: 'cubic-bezier(0.15, 0.8, 0.3, 1)' }, ); }); }); return ( <label className={styles.row} data-part="row" data-kind="habit" data-done={done || undefined}> <input type="checkbox" className={styles.input} checked={done} onChange={(event) => onChange(event.target.checked)} /> <Box dashed boxRef={boxRef} /> <Title text={item.title} /> <span className={styles.hidden}>, {count}-day streak</span> <span className={styles.slot} aria-hidden="true"> <span ref={pill} className={styles.pill} data-part="pill" data-tone="streak" data-shown=""> <span ref={flame} className={styles.flame} data-part="flame"> <FlameGlyph className={styles.flameBody} /> <FlameCoreGlyph className={styles.flameCore} /> {SPARKS.map(({ x, y, r, t, d }, i) => ( <span key={i} className={styles.spark} style={ { '--x': x, '--y': y, '--r': r, '--t': `${t}s`, '--d': `${d}s` } as CSSProperties } /> ))} {BURST.map(({ r }, i) => ( <span key={i} className={styles.burst} data-burst="" style={{ '--r': r } as CSSProperties} /> ))} </span> <span className={styles.count} data-part="count" data-roll={leaving === null ? undefined : leaving < shown ? 'up' : 'down'} > <span key={shown} className={styles.digit}> {shown} </span> {leaving !== null && ( <span key={`was-${leaving}`} className={`${styles.digit} ${styles.leaving}`}> {leaving} </span> )} </span> </span> </span> </label> ); } export function TaskPills({ items = ITEMS, onToggle, ambient = true, autoplay = true, colorScheme, className = '', }: { /** The rows, at first: an event (a Now pill), tasks (when they were due) and habits (a streak). */ items?: TaskItem[]; /** Called when the reader checks or unchecks a task or a habit, with its id. */ onToggle?: (id: string, done: boolean) => void; /** The pills' idle motion: the breathing dot, the sweeping clock, the flickering flame. */ ambient?: boolean; /** While on screen and untouched, a ghost pointer checks the task and the habit, then resets. */ autoplay?: boolean; /** Light or dark colours, or 'system' for the reader's; without it, the page's color-scheme. */ colorScheme?: 'light' | 'dark' | 'system'; /** Extra class for the root, a stage of its own. */ className?: string; }) { const { ref: root, playing, take } = useAutoplay<HTMLDivElement>(6000); const [done, setDone] = useState<Record<string, boolean>>(() => Object.fromEntries(items.map((item) => [item.id, item.kind !== 'event' && !!item.done])), ); const [message, setMessage] = useState(''); /** Keyboard focus is on the stage: the ghost leaves it alone. */ const [keyboard, setKeyboard] = useState(false); /** Part of the stage is on screen in a visible tab: the idle motion plays. */ const [live, setLive] = useState(false); const boxes = useRef(new Map<string, HTMLSpanElement>()); const pointer = useRef<HTMLSpanElement>(null); const stopGhost = useRef<(() => void) | null>(null); /** What is done, for the demo between renders. */ const doneNow = useRef(done); useLayoutEffect(() => { doneNow.current = done; }, [done]); /** Repeats are made to differ, so screen readers announce them again. */ const announce = (text: string) => setMessage((now) => (now === text ? `${text}\u00a0` : text)); const toggle = (item: TaskItem, next: boolean, byReader: boolean) => { if (item.kind === 'event') return; setDone((now) => ({ ...now, [item.id]: next })); if (!byReader) return; onToggle?.(item.id, next); if (item.kind === 'task') announce(`${item.title}, ${next ? 'done' : 'not done'}.`); else { const days = item.streak + (next ? 1 : 0); announce(`${item.title}, ${next ? 'done' : 'not done'}. ${days}-day streak.`); } }; // The idle motion plays while part of the stage is on screen. useEffect(() => { const element = root.current; if (!element || !ambient) return; let onScreen = false; const update = () => setLive(onScreen && !document.hidden); const observer = new IntersectionObserver(([entry]) => { onScreen = entry.isIntersecting; update(); }); observer.observe(element); document.addEventListener('visibilitychange', update); return () => { observer.disconnect(); document.removeEventListener('visibilitychange', update); setLive(false); }; }, [ambient, root]); /* The demo: the ghost checks the task, then the habit, and unchecks both. */ const demo = autoplay && playing && !keyboard; useEffect(() => { const stage = root.current; const arrow = pointer.current; if (!demo || !stage || !arrow) return; const checkable = items.filter((item) => item.kind !== 'event'); const task = checkable.find((item) => item.kind === 'task'); const habit = checkable.find((item) => item.kind === 'habit'); const stop = runDemo(stage, arrow, async ({ wait, moveTo, press }) => { const click = async (item: TaskItem | undefined, next: boolean, rest: number) => { if (!item || doneNow.current[item.id] === next) return; await moveTo(boxes.current.get(item.id)); await press(() => toggle(item, next, false)); await wait(rest); }; await wait(1000); for (;;) { // Whatever the reader left checked goes back first. for (const item of checkable) await click(item, false, 500); await click(task, true, 1500); await click(habit, true, 2600); await click(task, false, 800); await click(habit, false, 2400); } }); stopGhost.current = stop; return stop; // The script reads refs; it restarts when the demo may play or not. // eslint-disable-next-line react-hooks/exhaustive-deps }, [demo, root]); /** The reader takes over: the ghost stops at once and waits until they leave it alone. */ const readerActs = () => { stopGhost.current?.(); take(); }; const onFocus = (event: FocusEvent<HTMLDivElement>) => { if (event.target.matches(':focus-visible')) setKeyboard(true); }; const onBlur = (event: FocusEvent<HTMLDivElement>) => { if (!event.currentTarget.contains(event.relatedTarget)) setKeyboard(false); }; return ( <div ref={root} className={`${styles.stage} ${className}`} data-part="stage" data-color-scheme={colorScheme} data-live={live || undefined} onPointerDownCapture={readerActs} onKeyDownCapture={readerActs} onFocus={onFocus} onBlur={onBlur} > <div className={styles.scene}> <ul className={styles.list}> {items.map((item) => { const boxRef = (element: HTMLSpanElement | null) => { if (element) boxes.current.set(item.id, element); else boxes.current.delete(item.id); }; const onChange = (next: boolean) => toggle(item, next, true); return ( <li key={item.id}> {item.kind === 'event' && <EventRow item={item} />} {item.kind === 'task' && ( <TaskRow item={item} done={!!done[item.id]} onChange={onChange} boxRef={boxRef} /> )} {item.kind === 'habit' && ( <HabitRow item={item} done={!!done[item.id]} onChange={onChange} boxRef={boxRef} /> )} </li> ); })} </ul> </div> <p className={styles.hidden} role="status"> {message} </p> <div className={styles.pointerLayer} aria-hidden="true"> <DemoPointer ref={pointer} /> </div> </div> ); } ``` ### task-pills/task-pills.module.css ```css /* Task pills (task-pills.tsx): a white stage with the list in its middle, or at night a near-black one. Every measure in the list is a number of units, --u (a pill is 34 of them tall), which follows the stage's width. Colours are the tokens below, light-dark(light, dark): the component takes the color-scheme it inherits from the page (light unless the page says otherwise), or the one its colorScheme prop sets (data-color-scheme). Each pill has a soft background and an ink; the white marks cut into its drawings (the clock's hands, the done check, the flame's heart) take the pill's background at night, so they still read as cut out. Memory and layout. The stage is one layout boundary, its height set by its width, so nothing that changes inside it lays out the page around it. What moves is small boxes around static drawings, by transforms and opacity: the compositor plays the idle motion on layers a few px wide, and it pauses while the list is off screen (data-live). */ .stage { /* The stage and its edge. */ --surface: #fff; --line: rgb(0 0 0 / 0.06); /* A title; the habit's and a done one's; the checkboxes' outlines, plain and dashed. */ --ink: #0d0d0d; --ink-muted: #ababab; --box: #d1d1d1; --box-dashed: #d9d9d9; /* A checked box: green for the task, orange for the habit, the check white on both. */ --accent: #45b36b; --accent-habit: #df7843; --accent-ink: #fff; /* The pills, background then ink: Now, overdue, Done, the streak. */ --now-bg: #edf7ff; --now-ink: #62aef8; --due-bg: #f7f7f7; --due-ink: #747474; --done-bg: #ebf8ef; --done-ink: #45b36b; --streak-bg: #fcf4ec; --streak-ink: #df7843; /* The marks cut into the overdue clock and the Done mark: white, or the pill's own background at night. */ --due-hand: #fff; --done-mark: #fff; --focus: #0a84ff; /* The demo's pointer looks like the system's on both: a dark arrow with a white edge. */ --pointer: #1c1c1e; --pointer-edge: #fff; --pointer-shadow: rgb(0 0 0 / 0.25); position: relative; overflow: hidden; overflow: clip; container-type: inline-size; contain: layout; border-radius: 18px; background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); -webkit-tap-highlight-color: transparent; } @supports (color: light-dark(#fff, #000)) { .stage { --surface: light-dark(#fff, #111113); --line: light-dark(rgb(0 0 0 / 0.06), rgb(255 255 255 / 0.07)); --ink: light-dark(#0d0d0d, #f2f2f4); --ink-muted: light-dark(#ababab, #858589); --box: light-dark(#d1d1d1, #6c6c70); --box-dashed: light-dark(#d9d9d9, #646468); --accent: light-dark(#45b36b, #3a9d5d); --accent-habit: light-dark(#df7843, #d06a37); --now-bg: light-dark(#edf7ff, #10233a); --now-ink: light-dark(#62aef8, #6cb6ff); --due-bg: light-dark(#f7f7f7, #232325); --due-ink: light-dark(#747474, #a1a1a6); --done-bg: light-dark(#ebf8ef, #11291b); --done-ink: light-dark(#45b36b, #5ccb83); --streak-bg: light-dark(#fcf4ec, #33200f); --streak-ink: light-dark(#df7843, #f08a55); --due-hand: light-dark(#fff, #232325); --done-mark: light-dark(#fff, #11291b); --focus: light-dark(#0a84ff, #3594ff); } } /* The colorScheme prop. Without it the stage sets nothing and inherits the page's color-scheme. */ .stage[data-color-scheme='light'] { color-scheme: light; } .stage[data-color-scheme='dark'] { color-scheme: dark; } .stage[data-color-scheme='system'] { color-scheme: light dark; } .stage *, .stage *::before, .stage *::after { box-sizing: border-box; } /* The list's place: its height follows the stage's width, so it never depends on the list. */ .scene { display: grid; place-items: center; height: clamp(240px, 75cqw, 620px); } .list { /* 1.4 px on a wide stage; on a narrow one, the list keeps a margin. */ --u: min(1.4px, max(0.165cqw, min(0.82px, 0.255cqw))); width: calc(348 * var(--u)); margin: 0; padding: 0; color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', Inter, 'Segoe UI', Roboto, sans-serif; list-style: none; -webkit-font-smoothing: antialiased; } /* A row: its glyph or checkbox, its title, its pill on the right. */ .row { position: relative; display: flex; align-items: center; height: calc(64 * var(--u)); -webkit-user-select: none; user-select: none; } label.row { cursor: pointer; } .input { position: absolute; width: 1px; height: 1px; margin: 0; overflow: hidden; clip-path: inset(50%); opacity: 0; } .box { position: relative; flex: none; width: calc(21 * var(--u)); height: calc(21 * var(--u)); margin-right: calc(15.4 * var(--u)); color: var(--box); } .box > * { position: absolute; inset: 0; display: block; width: 100%; height: 100%; } .box svg { display: block; width: 100%; height: 100%; overflow: visible; } .dashed { color: var(--box-dashed); } .input:focus-visible + .box { border-radius: calc(6 * var(--u)); outline: 2px solid var(--focus); outline-offset: 3px; } /* Checked: the outline goes, a filled square springs in, and its check is drawn left to right. */ .outline { transition: opacity 0.2s ease, transform 0.3s ease; } .fill { color: var(--accent); opacity: 0; transform: scale(0.4); transition: opacity 0.18s ease, transform 0.2s ease; } .row[data-kind='habit'] .fill { color: var(--accent-habit); } .check { color: var(--accent-ink); clip-path: inset(0 100% 0 0); transition: clip-path 0.15s ease; } .row[data-done] .outline { opacity: 0; transform: scale(0.75); } .row[data-done] .dashed { transform: rotate(45deg) scale(0.75); } .row[data-done] .fill { opacity: 1; transform: none; transition: opacity 0.12s ease, transform 0.42s cubic-bezier(0.3, 1.5, 0.5, 1); } .row[data-done] .check { clip-path: inset(0); transition: clip-path 0.28s cubic-bezier(0.5, 0, 0.3, 1) 0.14s; } .title { position: relative; overflow: visible; font-size: calc(21.3 * var(--u)); font-weight: 600; line-height: 1.2; letter-spacing: -0.012em; white-space: nowrap; transition: color 0.3s ease; } .row[data-kind='habit'] .title, .row[data-done] .title { color: var(--ink-muted); } /* The strike, drawn across once done. */ .strike { position: absolute; top: 54%; right: calc(-1 * var(--u)); left: calc(-1 * var(--u)); height: calc(1.8 * var(--u)); margin-top: calc(-0.9 * var(--u)); border-radius: var(--u); background: currentColor; transform: scaleX(0); transform-origin: 0 50%; transition: transform 0.25s ease; } .row[data-done] .strike { transform: none; transition: transform 0.38s cubic-bezier(0.6, 0, 0.3, 1) 0.08s; } /* The pills, stacked in one place at the row's right end; one is shown. */ .slot { display: inline-grid; justify-items: end; align-items: center; margin-left: auto; } .pill { position: relative; grid-area: 1 / 1; display: inline-flex; align-items: center; height: calc(34 * var(--u)); border-radius: calc(17 * var(--u)); font-size: calc(16 * var(--u)); font-weight: 600; line-height: 1; letter-spacing: -0.012em; white-space: nowrap; opacity: 0; visibility: hidden; transition: visibility 0s linear 0.46s; } .pill[data-shown] { z-index: 1; opacity: 1; visibility: visible; transition: none; } .pill[data-tone='now'] { gap: calc(4.2 * var(--u)); padding: 0 calc(10.2 * var(--u)) 0 calc(10.7 * var(--u)); background: var(--now-bg); color: var(--now-ink); } .pill[data-tone='due'] { padding: 0 calc(10 * var(--u)) 0 calc(8.8 * var(--u)); background: var(--due-bg); color: var(--due-ink); } .pill[data-tone='done'] { gap: calc(5 * var(--u)); padding: 0 calc(11.6 * var(--u)) 0 calc(9.4 * var(--u)); background: var(--done-bg); color: var(--done-ink); } .pill[data-tone='streak'] { gap: calc(7.6 * var(--u)); padding: 0 calc(12 * var(--u)) 0 calc(11.6 * var(--u)); background: var(--streak-bg); color: var(--streak-ink); } /* Now: a dot that breathes, and a ripple that leaves it. */ .dot { position: relative; flex: none; width: calc(10.5 * var(--u)); height: calc(10.5 * var(--u)); } .ripple, .core { position: absolute; inset: 0; border-radius: 50%; background: currentColor; } .ripple { opacity: 0; animation: ripple 2.6s cubic-bezier(0.2, 0.6, 0.4, 1) infinite; } .core { animation: breathe 2.6s ease-in-out infinite; } @keyframes breathe { 0%, 100% { transform: none; } 50% { transform: scale(0.78); } } @keyframes ripple { 0% { opacity: 0.4; transform: none; } 70%, 100% { opacity: 0; transform: scale(2.4); } } /* Overdue: speed lines, then a clock whose minute hand sweeps round now and then. */ .lines { position: relative; flex: none; width: calc(4.6 * var(--u)); height: calc(9.05 * var(--u)); margin-right: calc(1 * var(--u)); } .line { position: absolute; right: 0; width: calc(3.5 * var(--u)); height: calc(1.35 * var(--u)); border-radius: var(--u); background: currentColor; transform-origin: 100% 50%; animation: trail 3.2s ease-in-out infinite; } .line:nth-child(1) { top: 0; } .line:nth-child(2) { top: calc(3.85 * var(--u)); right: calc(1.1 * var(--u)); width: calc(3.3 * var(--u)); animation-delay: 0.06s; } .line:nth-child(3) { top: calc(7.7 * var(--u)); animation-delay: 0.12s; } .clock { position: relative; flex: none; width: calc(14.2 * var(--u)); height: calc(14.2 * var(--u)); margin-right: calc(4.7 * var(--u)); } /* The drawings stay whole however their boxes round to the screen's pixels. */ .face { display: block; width: 100%; height: 100%; overflow: visible; } .hand { position: absolute; bottom: calc(50% - 0.75 * var(--u)); left: calc(50% - 0.75 * var(--u)); width: calc(1.5 * var(--u)); border-radius: var(--u); background: var(--due-hand); transform-origin: 50% calc(100% - 0.75 * var(--u)); } .minute { height: calc(4.9 * var(--u)); animation: sweep 3.2s infinite; } .hour { height: calc(3.9 * var(--u)); transform: rotate(135deg); animation: hour 38.4s linear infinite; } @keyframes sweep { 0% { transform: none; animation-timing-function: cubic-bezier(0.55, 0, 0.25, 1); } 42%, 100% { transform: rotate(360deg); } } @keyframes hour { from { transform: rotate(135deg); } to { transform: rotate(495deg); } } @keyframes trail { 0%, 44%, 100% { opacity: 1; transform: none; } 14% { opacity: 0.5; transform: translateX(calc(-1.4 * var(--u))) scaleX(1.55); } 30% { opacity: 0.85; transform: translateX(calc(-0.4 * var(--u))) scaleX(1.15); } } /* Done: a check in a filled circle. */ .mark { flex: none; width: calc(14.2 * var(--u)); height: calc(14.2 * var(--u)); } /* The streak: a flame that flickers, its heart flickering out of step, and sparks rising now and then; the burst's sparks wait, hidden, at its middle. */ .flame { position: relative; flex: none; transform-origin: 50% 80%; width: calc(15.4 * var(--u)); height: calc(18.3 * var(--u)); } .flameBody, .flameCore { position: absolute; inset: 0; display: block; width: 100%; height: 100%; overflow: visible; } .flameBody { transform-origin: 50% 92%; animation: flicker 1.9s ease-in-out infinite; } .flameCore { color: var(--streak-bg); transform-origin: 47% 82%; animation: core 1.3s ease-in-out infinite; } @keyframes flicker { 0%, 100% { transform: none; } 25% { transform: scale(1.03, 1.07) skewX(-2deg); } 50% { transform: scale(0.98, 0.95) skewX(1.5deg); } 75% { transform: scale(1.02, 1.04) skewX(1deg); } } @keyframes core { 0%, 100% { transform: none; } 40% { transform: scale(0.86, 0.9); } 70% { transform: scale(1.05, 1.07); } } .spark, .burst { position: absolute; width: calc(var(--r) * 2 * var(--u)); height: calc(var(--r) * 2 * var(--u)); margin: calc(var(--r) * -1 * var(--u)) 0 0 calc(var(--r) * -1 * var(--u)); border-radius: 50%; background: currentColor; } .spark { top: calc(var(--y) * var(--u)); left: calc(var(--x) * var(--u)); animation: rise var(--t) ease-in-out var(--d) infinite; } .burst { top: 38%; left: 50%; opacity: 0; } @keyframes rise { 0%, 58%, 100% { opacity: 1; transform: none; } 26% { opacity: 0; transform: translateY(calc(-5 * var(--u))) scale(0.4); } 27% { opacity: 0; transform: translateY(calc(3 * var(--u))) scale(0.3); } } /* The count: one digit's box, which a new number rolls into. */ .count { position: relative; display: inline-block; height: 1.2em; overflow: hidden; overflow: clip; font-variant-numeric: tabular-nums; line-height: 1.2; } .digit { display: block; } .leaving { position: absolute; top: 0; right: 0; opacity: 0; } .count[data-roll='up'] .digit { animation: in-up 0.46s cubic-bezier(0.3, 1.3, 0.5, 1); } .count[data-roll='up'] .leaving { animation: out-up 0.36s ease-in; } .count[data-roll='down'] .digit { animation: in-down 0.46s cubic-bezier(0.3, 1.3, 0.5, 1); } .count[data-roll='down'] .leaving { animation: out-down 0.36s ease-in; } @keyframes in-up { from { transform: translateY(100%); } } @keyframes in-down { from { transform: translateY(-100%); } } @keyframes out-up { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(-100%); } } @keyframes out-down { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(100%); } } /* Off screen, or before the page runs, the idle motion holds still at its first frame. */ .stage:not([data-live]) :is(.ripple, .core, .line, .minute, .hour, .flameBody, .flameCore, .spark) { animation-play-state: paused; } /* For screen readers only. */ .hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; } /* The demo's pointer moves over the whole stage, in a box of its own, contained, so that nothing in it can ever lay out the page around it. */ .pointerLayer { position: absolute; z-index: 10; inset: 0; contain: strict; pointer-events: none; } @media (prefers-reduced-motion: reduce) { .stage *, .stage *::before, .stage *::after { animation: none; transition: none; } } ``` ### task-pills/glyphs.tsx ```tsx /* * The list's drawings, as static SVGs. Nothing inside them ever changes: whatever moves (a clock * hand, the flame, a check being drawn) is an HTML box around a drawing, moved by transforms or * revealed by a clip. Their colours are the stage's tokens (task-pills.module.css): most take * the colour of the box they sit in. */ /** The event's calendar: a rounded square with a solid header and four dots. */ export function CalendarGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 21 21" aria-hidden="true"> <rect x="0.85" y="0.85" width="19.3" height="19.3" rx="5.4" fill="none" stroke="currentColor" strokeWidth="1.7" /> <path d="M.94 5.25A5.4 5.4 0 0 1 6.25.85h8.5a5.4 5.4 0 0 1 5.31 4.4z" fill="currentColor" /> <circle cx="9" cy="9.1" r="1.55" fill="currentColor" /> <circle cx="13.3" cy="9.1" r="1.55" fill="currentColor" /> <circle cx="4.7" cy="13.4" r="1.55" fill="currentColor" /> <circle cx="9" cy="13.4" r="1.55" fill="currentColor" /> </svg> ); } /** A task's empty checkbox: a rounded square. */ export function BoxGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 21 21" aria-hidden="true"> <rect x="1" y="1" width="19" height="19" rx="5.6" fill="none" stroke="currentColor" strokeWidth="1.9" /> </svg> ); } /** A habit's checkbox: the same square, drawn as two short dashes a side with open corners. */ export function DashedBoxGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 21 21" aria-hidden="true"> <path d="M4.8 1h4m3.4 0h4M4.8 20h4m3.4 0h4M1 4.8v4m0 3.4v4m19-11.4v4m0 3.4v4" fill="none" stroke="currentColor" strokeWidth="1.8" /> </svg> ); } /** A filled square with a check, for a done task or habit: the check is drawn on its own. */ export function FilledBoxGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 21 21" aria-hidden="true"> <rect x="0.05" y="0.05" width="20.9" height="20.9" rx="6.5" fill="currentColor" /> </svg> ); } export function CheckGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 21 21" aria-hidden="true"> <path d="m5.6 10.9 3.3 3.3 6.5-7" fill="none" stroke="currentColor" strokeWidth="2.3" strokeLinecap="round" strokeLinejoin="round" /> </svg> ); } /** The overdue clock's face, without its hands (they move). */ export function ClockFace({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 14 14" aria-hidden="true"> <circle cx="7" cy="7" r="7" fill="currentColor" /> </svg> ); } /** A done task's mark: a filled circle with a check cut into it. */ export function DoneGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 14 14" aria-hidden="true"> <circle cx="7" cy="7" r="7" fill="currentColor" /> <path d="m4.1 7.2 2 2 3.9-4.3" fill="none" style={{ stroke: 'var(--done-mark)' }} strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" /> </svg> ); } /** The streak's flame: a full, rounded drop with a short blunt point. */ export function FlameGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 30.8 36.6" aria-hidden="true"> <path d="M15.4 0c6 2 15.4 12.5 15.4 22 0 13-14.2 14.6-15.4 14.6S0 35 0 22C0 12.5 9.4 2 15.4 0z" fill="currentColor" /> </svg> ); } /** The flame's hollow heart, filled with the pill's colour. */ export function FlameCoreGlyph({ className }: { className?: string }) { return ( <svg className={className} viewBox="0 0 30.8 36.6" aria-hidden="true"> <path d="M15.4 18.3c2.2 1.6 6.14 4.3 6.14 9.8 0 2.5-2.14 5.85-6.14 5.85s-6.14-3.35-6.14-5.85c0-5.5 3.94-8.2 6.14-9.8z" fill="currentColor" /> </svg> ); } ``` ### task-pills/demo-pointer.tsx ```tsx 'use client'; import type { CSSProperties, Ref } from 'react'; /* * The demo's pointer, and the steps that move it. A demo is a script of awaited steps: wait, * glide the pointer onto a control and press it, calling the component's own handler as a hand * would. Stopping the demo (the reader takes over, or it scrolls away) ends the step in progress * at once: its promise rejects, which ends the script right there, and the pointer fades out. * * Nothing the pointer does while the demo plays needs a layout, because one here in the same * frame as one in the list would make the browser lay out the whole page (see the note at the * top of the stylesheet). So it moves by animations the compositor plays, and the press scales a * box that keeps a transform at rest, since a box that gains or loses one is laid out again. */ export type Point = { x: number; y: number }; export type Demo = { /** Resolves after `ms`. */ wait: (ms: number) => Promise<void>; /** Glides the pointer onto `target`: its middle, or a point given as shares of its size. */ moveTo: (target: Element | null | undefined, at?: Point) => Promise<void>; /** Presses and lets go; `action` runs as the pointer goes down. */ press: (action: () => void) => Promise<void>; }; /** What a stopped demo's pending step rejects with. */ class Stopped extends Error {} /** Where the arrow's tip is, in its 20 × 20 box: the point the pointer acts on. */ const TIP: Point = { x: 3, y: 2 }; const place = ({ x, y }: Point) => `translate(${x - TIP.x}px, ${y - TIP.y}px)`; /** Plays `script` with the pointer over `stage`; returns the function that stops it. */ export function runDemo( stage: HTMLElement, pointer: HTMLElement, script: (demo: Demo) => Promise<void>, ): () => void { let alive = true; let flight: Animation | null = null; const timers = new Set<number>(); const pending = new Set<() => void>(); // The pointer comes in from the lower right. let at: Point = { x: stage.offsetWidth * 0.82, y: stage.offsetHeight * 0.92 }; /** Settles like `promise`, or rejects as soon as the demo stops. */ const step = (promise: Promise<unknown>) => new Promise<void>((resolve, reject) => { if (!alive) return reject(new Stopped()); const cancel = () => reject(new Stopped()); pending.add(cancel); promise.then( () => { pending.delete(cancel); if (alive) resolve(); }, () => { pending.delete(cancel); reject(new Stopped()); }, ); }); const wait = (ms: number) => step( new Promise<void>((resolve) => { const timer = window.setTimeout(() => { timers.delete(timer); resolve(); }, ms); timers.add(timer); }), ); /** A point of the screen in the stage's own px (the stage may sit in a scaled container). */ const toStage = (point: Point): Point => { const frameBox = stage.getBoundingClientRect(); const scale = frameBox.width / stage.offsetWidth || 1; return { x: (point.x - frameBox.left) / scale, y: (point.y - frameBox.top) / scale }; }; const glide = (to: Point) => { const from = at; at = to; const dx = to.x - from.x; const dy = to.y - from.y; // A gentle curve, as a hand moves: the control point sits off the straight line. const bend = { x: (from.x + to.x) / 2 - dy * 0.16, y: (from.y + to.y) / 2 + dx * 0.16 }; const keyframes: Keyframe[] = []; for (let i = 0; i <= 12; i += 1) { const t = i / 12; const u = 1 - t; keyframes.push({ transform: place({ x: u * u * from.x + 2 * u * t * bend.x + t * t * to.x, y: u * u * from.y + 2 * u * t * bend.y + t * t * to.y, }), }); } flight?.cancel(); // Where it rests once the flight is over. pointer.style.transform = place(to); flight = pointer.animate(keyframes, { duration: Math.min(950, Math.max(360, Math.hypot(dx, dy) * 1.6)), easing: 'cubic-bezier(0.45, 0, 0.2, 1)', }); return step(flight.finished); }; const moveTo: Demo['moveTo'] = (target, share = { x: 0.5, y: 0.5 }) => { if (!target) return step(Promise.resolve()); const box = target.getBoundingClientRect(); return glide(toStage({ x: box.left + box.width * share.x, y: box.top + box.height * share.y })); }; const press: Demo['press'] = async (action) => { // The glyph dips towards its tip. const tap = pointer.firstElementChild?.animate( [ { transform: 'scale(1)' }, { transform: 'scale(0.82)', offset: 0.35 }, { transform: 'scale(1)' }, ], { duration: 280, easing: 'ease-in-out' }, ); await wait(95); action(); if (tap) await step(tap.finished); }; pointer.style.transform = place(at); pointer.style.opacity = '1'; script({ wait, moveTo, press }).catch((error: unknown) => { if (!(error instanceof Stopped)) throw error; }); return () => { if (!alive) return; alive = false; timers.forEach((timer) => window.clearTimeout(timer)); flight?.cancel(); pending.forEach((cancel) => cancel()); pointer.style.opacity = '0'; }; } /** The pointer's box: it moves, on a layer of its own. */ const POINTER: CSSProperties = { position: 'absolute', top: 0, left: 0, display: 'block', width: 22, height: 22, pointerEvents: 'none', opacity: 0, transition: 'opacity 0.3s ease', filter: 'drop-shadow(0 1px 1.5px var(--pointer-shadow))', willChange: 'transform', }; /** Inside it, what dips towards the tip when the pointer presses, on a layer of its own. */ const PRESS: CSSProperties = { display: 'block', width: 22, height: 22, transform: 'scale(1)', transformOrigin: `${TIP.x * 1.1}px ${TIP.y * 1.1}px`, willChange: 'transform', }; /** The 20 × 20 drawing at 22 px. Its colours are the stage's tokens (task-pills.module.css). */ const DRAWING: CSSProperties = { display: 'block', width: 22, height: 22, overflow: 'visible', fill: 'var(--pointer)', stroke: 'var(--pointer-edge)', }; /** The arrow the demo moves around. It is decorative: the demo's effects show on the list. */ export function DemoPointer({ ref }: { ref: Ref<HTMLSpanElement> }) { return ( <span ref={ref} style={POINTER} aria-hidden="true"> <span style={PRESS}> <svg viewBox="0 0 20 20" style={DRAWING}> <path d="M3 2v14.5l3.6-3.3 2.6 5.6 2.4-1.1-2.6-5.5h5.2z" strokeWidth="1.3" strokeLinejoin="round" /> </svg> </span> </span> ); } ``` ### task-pills/use-autoplay.ts ```tsx '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<T extends HTMLElement>(idle = 6000) { const ref = useRef<T>(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, playing: visible && !reduced && !taken }; } ```