Spectrum UI
componentchart-datasource: ok · hit
Connecting Real Data
Wiring any chart to a real source: fetch in an effect, SWR or React Query, server components, and streaming — with every outcome mapped onto a status.
npx shadcn add "https://ui.spectrumhq.in/r/chart-data.json"free
Where it goes
stats
Interaction
animated-counter
Tags auto-generated by rules on 9/24/2026 — empty means no evidence, not lack of support.
Files3 · source cached 10/14/2026, 1:19:02 PM
app/registry/charts/chart-engine.tsx
'use client';
import * as React from 'react';
import { cn } from '@/lib/utils';
export const marketVarsClassName =
'[--spectrum-chart-up:#059669] [--spectrum-chart-down:#e11d48] [--spectrum-chart-surface:#fff] dark:[--spectrum-chart-up:#34d399] dark:[--spectrum-chart-down:#fb7185] dark:[--spectrum-chart-surface:#0a0a0a]';
export const UP = 'var(--spectrum-chart-up)';
export const DOWN = 'var(--spectrum-chart-down)';
export const SURFACE = 'var(--spectrum-chart-surface)';
export const EASE = 'cubic-bezier(0.22, 1, 0.36, 1)';
export type Candle = {
t: number;
open: number;
high: number;
low: number;
close: number;
volume: number;
};
export type MarketRange = {
label: string;
bars: number | null;
};
export const MARKET_RANGES: MarketRange[] = [
{ label: '1W', bars: 7 },
{ label: '1M', bars: 30 },
{ label: '3M', bars: 90 },
{ label: '6M', bars: 180 },
{ label: '1Y', bars: 365 },
{ label: 'ALL', bars: null },
];
export function mulberry32(seed: number) {
let a = seed;
return () => {
a |= 0;
a = (a + 0x6d2b79f5) | 0;
let t = Math.imul(a ^ (a >>> 15), 1 | a);
t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
};
}
export const DAY_MS = 86_400_000;
export function generateCandles({
seed,
count,
start,
drift,
vol,
startedAt,
}: {
seed: number;
count: number;
start: number;
drift: number;
vol: number;
startedAt: number;
}): Candle[] {
const rand = mulberry32(seed);
const out: Candle[] = [];
let price = start;
let volatility = vol;
for (let i = 0; i < count; i += 1) {
volatility += (vol - volatility) * 0.05 + (rand() - 0.5) * vol * 0.35;
volatility = Math.max(vol * 0.35, Math.min(vol * 2.6, volatility));
const open = price;
const shock = (rand() - 0.5) * 2 * volatility + drift;
const close = Math.max(0.01, open * (1 + shock));
const wick = Math.abs(shock) * 0.9 + volatility * 0.55;
const high = Math.max(open, close) * (1 + rand() * wick);
const low = Math.min(open, close) * (1 - rand() * wick);
const range = Math.abs(close - open) / Math.max(open, 1e-6);
const volume = Math.round((0.55 + rand() * 0.7 + range * 26) * 1_000_000);
out.push({
t: startedAt + i * DAY_MS,
open: round2(open),
high: round2(high),
low: round2(low),
close: round2(close),
volume,
});
price = close;
}
return out;
}
export function round2(v: number) {
return Math.round(v * 100) / 100;
}
const SERIES_END = Date.UTC(2026, 7, 21);
const SERIES_LEN = 420;
const SERIES_START = SERIES_END - (SERIES_LEN - 1) * DAY_MS;
export const SOL_MARKET = generateCandles({
seed: 20_260_823,
count: SERIES_LEN,
start: 96.4,
drift: 0.0021,
vol: 0.031,
startedAt: SERIES_START,
});
export const AAPL_MARKET = generateCandles({
seed: 7_431_902,
count: SERIES_LEN,
start: 189.2,
drift: 0.0009,
vol: 0.013,
startedAt: SERIES_START,
});
export const BTC_MARKET = generateCandles({
seed: 41_556_073,
count: SERIES_LEN,
start: 61_400,
drift: 0.0016,
vol: 0.022,
startedAt: SERIES_START,
});
export function formatMoney(value: number, compact = false) {
const digits = compact ? 2 : value >= 1000 ? 2 : value >= 1 ? 2 : 4;
return new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
notation: compact ? 'compact' : 'standard',
minimumFractionDigits: compact ? 0 : digits,
maximumFractionDigits: digits,
}).format(value);
}
export function formatSignedPct(value: number) {
return `${value > 0 ? '+' : value < 0 ? '−' : ''}${Math.abs(value).toFixed(2)}%`;
}
export const DATE_SHORT = new Intl.DateTimeFormat('en-US', {
month: 'short',
day: 'numeric',
timeZone: 'UTC',
});
export const DATE_FULL = new Intl.DateTimeFormat('en-US', {
month: 'short',
day: 'numeric',
year: 'numeric',
timeZone: 'UTC',
});
export function formatAxisPrice(value: number) {
if (Math.abs(value) >= 10_000) return formatMoney(value, true);
return formatMoney(value, false);
}
export function niceTicks(lo: number, hi: number, target = 5): number[] {
if (!Number.isFinite(lo) || !Number.isFinite(hi) || hi <= lo) return [lo];
const raw = (hi - lo) / target;
const mag = Math.pow(10, Math.floor(Math.log10(raw)));
const norm = raw / mag;
const step = (norm >= 7.5 ? 10 : norm >= 3.5 ? 5 : norm >= 2.25 ? 2.5 : norm >= 1.5 ? 2 : 1) * mag;
const first = Math.ceil(lo / step) * step;
const out: number[] = [];
for (let v = first; v <= hi + step * 0.001; v += step) {
out.push(Math.round(v / step) * step);
}
return out;
}
export function monotonePath(points: { x: number; y: number }[]): string {
const n = points.length;
if (n === 0) return '';
if (n === 1) return `M${points[0].x},${points[0].y}`;
const dx: number[] = [];
const slope: number[] = [];
for (let i = 0; i < n - 1; i += 1) {
dx[i] = points[i + 1].x - points[i].x;
slope[i] = dx[i] === 0 ? 0 : (points[i + 1].y - points[i].y) / dx[i];
}
const tangent = new Array<number>(n);
tangent[0] = slope[0];
tangent[n - 1] = slope[n - 2];
for (let i = 1; i < n - 1; i += 1) {
if (slope[i - 1] * slope[i] <= 0) {
tangent[i] = 0;
} else {
const w1 = 2 * dx[i] + dx[i - 1];
const w2 = dx[i] + 2 * dx[i - 1];
tangent[i] = (w1 + w2) / (w1 / slope[i - 1] + w2 / slope[i]);
}
}
let d = `M${points[0].x},${points[0].y}`;
for (let i = 0; i < n - 1; i += 1) {
const c1x = points[i].x + dx[i] / 3;
const c1y = points[i].y + (tangent[i] * dx[i]) / 3;
const c2x = points[i + 1].x - dx[i] / 3;
const c2y = points[i + 1].y - (tangent[i + 1] * dx[i]) / 3;
d += `C${c1x.toFixed(2)},${c1y.toFixed(2)} ${c2x.toFixed(2)},${c2y.toFixed(2)} ${points[i + 1].x.toFixed(2)},${points[i + 1].y.toFixed(2)}`;
}
return d;
}
export const MORPH_SAMPLES = 132;
export function resample(values: number[], n = MORPH_SAMPLES): number[] {
if (values.length === 0) return new Array(n).fill(0);
if (values.length === 1) return new Array(n).fill(values[0]);
const out = new Array<number>(n);
for (let i = 0; i < n; i += 1) {
const p = (i / (n - 1)) * (values.length - 1);
const lo = Math.floor(p);
const hi = Math.min(values.length - 1, lo + 1);
out[i] = values[lo] + (values[hi] - values[lo]) * (p - lo);
}
return out;
}
export function usePrefersReducedMotion() {
const [reduce, setReduce] = React.useState(false);
React.useEffect(() => {
const mq = window.matchMedia('(prefers-reduced-motion: reduce)');
const sync = () => setReduce(mq.matches);
sync();
mq.addEventListener('change', sync);
return () => mq.removeEventListener('change', sync);
}, []);
return reduce;
}
export function useElementWidth<T extends HTMLElement>() {
const ref = React.useRef<T | null>(null);
const [width, setWidth] = React.useState(0);
React.useEffect(() => {
const node = ref.current;
if (!node) return;
const ro = new ResizeObserver(([entry]) => {
setWidth(entry.contentRect.width);
});
ro.observe(node);
setWidth(node.getBoundingClientRect().width);
return () => ro.disconnect();
}, []);
return [ref, width] as const;
}
export const easeOutCubic = (t: number) => 1 - Math.pow(1 - t, 3);
export function useTween(target: number[], { duration = 520, enabled = true } = {}) {
const [value, setValue] = React.useState(target);
const currentRef = React.useRef(target);
const fromRef = React.useRef(target);
const toRef = React.useRef(target);
const startRef = React.useRef(0);
const rafRef = React.useRef(0);
React.useEffect(() => {
if (!enabled) return;
const to = toRef.current;
const changed = to.length !== target.length || target.some((v, i) => v !== to[i]);
if (!changed) return;
toRef.current = target;
if (currentRef.current.length !== target.length) {
currentRef.current = target;
fromRef.current = target;
cancelAnimationFrame(rafRef.current);
rafRef.current = requestAnimationFrame(() => setValue(target));
return;
}
fromRef.current = currentRef.current;
startRef.current = performance.now();
cancelAnimationFrame(rafRef.current);
const tick = (now: number) => {
const p = Math.min(1, (now - startRef.current) / duration);
const e = easeOutCubic(p);
const from = fromRef.current;
const dest = toRef.current;
const next = dest.map((v, i) => from[i] + (v - from[i]) * e);
currentRef.current = next;
setValue(next);
if (p < 1) rafRef.current = requestAnimationFrame(tick);
};
rafRef.current = requestAnimationFrame(tick);
});
React.useEffect(() => () => cancelAnimationFrame(rafRef.current), []);
if (!enabled || value.length !== target.length) return target;
return value;
}
export function useTweenNumber(target: number, options?: { duration?: number; enabled?: boolean }) {
const vec = React.useMemo(() => [target], [target]);
return useTween(vec, options)[0];
}
export const KEYFRAMES = `
@keyframes spectrum-mc-rise {
from { transform: scaleY(0); opacity: 0; }
to { transform: scaleY(1); opacity: 1; }
}
@keyframes spectrum-mc-draw {
from { stroke-dashoffset: 1; }
to { stroke-dashoffset: 0; }
}
@keyframes spectrum-mc-fade {
from { opacity: 0; }
to { opacity: 1; }
}
@keyframes spectrum-sk-pulse {
from { opacity: 1; }
to { opacity: 0.4; }
}
@keyframes spectrum-mc-enter {
from { opacity: 0; transform: translateY(6px); }
to { opacity: 1; transform: translateY(0); }
}
@keyframes spectrum-mc-grow {
from { transform: scaleX(0); }
to { transform: scaleX(1); }
}
@keyframes spectrum-mc-flash {
from { opacity: 0.2; }
to { opacity: 0; }
}
@keyframes spectrum-mc-ping {
0% { r: 4; opacity: 0.55; }
70% { r: 13; opacity: 0; }
100% { r: 13; opacity: 0; }
}
`;
export function Keyframes() {
return <style>{KEYFRAMES}</style>;
}
const DIGITS = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
function Digit({ char, animate }: { char: string; animate: boolean }) {
const digit = char >= '0' && char <= '9' ? Number(char) : null;
if (digit == null) {
return (
<span aria-hidden className="inline-block h-[1em] align-bottom leading-none">
{char}
</span>
);
}
return (
<span
aria-hidden
className="relative inline-block h-[1em] w-[1ch] overflow-hidden align-bottom leading-none"
>
<span
className="absolute inset-x-0 top-0 block"
style={{
transform: `translateY(-${digit}em)`,
transition: animate ? 'transform 620ms cubic-bezier(0.22, 1, 0.36, 1)' : undefined,
}}
>
{DIGITS.map((d) => (
<span key={d} className="block h-[1em] text-center leading-none">
{d}
</span>
))}
</span>
</span>
);
}
export function RollingNumber({
value,
format,
className,
animate = true,
}: {
value: number;
format: (value: number) => string;
className?: string;
animate?: boolean;
}) {
const text = format(value);
return (
<span className={cn('inline-flex items-end leading-none tabular-nums', className)}>
<span className="sr-only">{text}</span>
{text.split('').map((char, index) => (
<Digit key={`${index}-${char >= '0' && char <= '9' ? 'digit' : char}`} char={char} animate={animate} />
))}
</span>
);
}
export function RangeSelector({
ranges,
value,
onChange,
reduce,
}: {
ranges: MarketRange[];
value: string;
onChange: (label: string) => void;
reduce: boolean;
}) {
const index = Math.max(0, ranges.findIndex((r) => r.label === value));
const width = 100 / ranges.length;
return (
<div
role="tablist"
aria-label="Time range"
className="relative inline-flex items-center rounded-full bg-black/[0.045] p-0.5 dark:bg-white/[0.07]"
>
<span
aria-hidden
className="absolute inset-y-0.5 left-0.5 rounded-full bg-white shadow-sm ring-1 ring-black/[0.06] dark:bg-white/12 dark:ring-white/10"
style={{
width: `calc(${width}% - 4px)`,
transform: `translateX(calc(${index * 100}% + ${index * 4}px))`,
transition: reduce ? undefined : 'transform 380ms cubic-bezier(0.22, 1, 0.36, 1)',
}}
/>
{ranges.map((range) => {
const active = range.label === value;
return (
<button
key={range.label}
type="button"
role="tab"
aria-selected={active}
onClick={() => onChange(range.label)}
className={cn(
'relative z-10 rounded-full px-2.5 py-1 font-mono text-[11px] leading-none tracking-wide transition-colors duration-200',
'focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-black/20 dark:focus-visible:ring-white/25',
active
? 'text-neutral-950 dark:text-white'
: 'text-neutral-500 hover:text-neutral-800 dark:text-neutral-400 dark:hover:text-neutral-200',
)}
style={{ flex: `0 0 ${width}%` }}
>
{range.label}
</button>
);
})}
</div>
);
}
export type BookLevel = {
price: number;
size: number;
total: number;
};
export type OrderBook = {
mid: number;
spread: number;
bids: BookLevel[];
asks: BookLevel[];
};
export function generateOrderBook({
mid,
seed,
levels = 14,
tick,
depth = 900,
}: {
mid: number;
seed: number;
levels?: number;
tick?: number;
depth?: number;
}): OrderBook {
const rand = mulberry32(seed);
const step = tick ?? Math.max(0.01, round2(mid * 0.0006));
const side = (direction: 1 | -1): BookLevel[] => {
const out: BookLevel[] = [];
let total = 0;
for (let i = 0; i < levels; i += 1) {
const distance = (i + 1) / levels;
const base = depth * (0.18 + distance * 0.9);
const whale = rand() > 0.87 ? 2.4 : 1;
const size = Math.round(base * (0.55 + rand() * 0.9) * whale);
total += size;
out.push({
price: round2(mid + direction * step * (i + 1)),
size,
total,
});
}
return out;
};
const asks = side(1);
const bids = side(-1);
return { mid, spread: round2(asks[0].price - bids[0].price), bids, asks };
}
export type TreemapInput = { label: string; weight: number; change: number; name?: string };
export type TreemapTile = TreemapInput & { x: number; y: number; w: number; h: number };
export function squarify(
items: TreemapInput[],
width: number,
height: number,
): TreemapTile[] {
const sorted = [...items].filter((i) => i.weight > 0).sort((a, b) => b.weight - a.weight);
const totalWeight = sorted.reduce((sum, i) => sum + i.weight, 0);
if (!sorted.length || totalWeight <= 0 || width <= 0 || height <= 0) return [];
const scale = (width * height) / totalWeight;
const out: TreemapTile[] = [];
let x = 0;
let y = 0;
let w = width;
let h = height;
let row: TreemapInput[] = [];
let index = 0;
const worst = (candidate: TreemapInput[], side: number) => {
if (!candidate.length || side <= 0) return Infinity;
const areas = candidate.map((i) => i.weight * scale);
const sum = areas.reduce((a, b) => a + b, 0);
const max = Math.max(...areas);
const min = Math.min(...areas);
const side2 = side * side;
const sum2 = sum * sum;
return Math.max((side2 * max) / sum2, sum2 / (side2 * min));
};
const layoutRow = (candidate: TreemapInput[], side: number, horizontal: boolean) => {
const sum = candidate.reduce((total, i) => total + i.weight * scale, 0);
const thickness = sum / side;
let offset = 0;
for (const item of candidate) {
const length = (item.weight * scale) / thickness;
out.push(
horizontal
? { ...item, x: x + offset, y, w: length, h: thickness }
: { ...item, x, y: y + offset, w: thickness, h: length },
);
offset += length;
}
if (horizontal) {
y += thickness;
h -= thickness;
} else {
x += thickness;
w -= thickness;
}
};
while (index < sorted.length) {
const horizontal = w >= h;
const side = horizontal ? w : h;
const next = sorted[index];
if (!row.length || worst([...row, next], side) <= worst(row, side)) {
row.push(next);
index += 1;
} else {
layoutRow(row, side, horizontal);
row = [];
}
}
if (row.length) layoutRow(row, w >= h ? w : h, w >= h);
return out;
}
export function changeColor(change: number, cap = 4) {
const t = Math.max(-1, Math.min(1, change / cap));
if (Math.abs(t) < 0.04) return 'var(--spectrum-heat-flat)';
const weight = 0.22 + Math.abs(t) * 0.78;
const base = t > 0 ? UP : DOWN;
return `color-mix(in srgb, ${base} ${(weight * 100).toFixed(0)}%, var(--spectrum-heat-flat))`;
}
export const seriesVarsClassName =
'[--spectrum-series-1:#2563eb] [--spectrum-series-2:#f59e0b] [--spectrum-series-3:#0d9488] [--spectrum-series-4:#7c3aed] [--spectrum-series-5:#db2777] [--spectrum-series-6:#64748b] [--spectrum-track:#ececef] [--spectrum-chart-surface:#fff] [--spectrum-chart-up:#059669] [--spectrum-chart-down:#e11d48] dark:[--spectrum-series-1:#60a5fa] dark:[--spectrum-series-2:#fbbf24] dark:[--spectrum-series-3:#2dd4bf] dark:[--spectrum-series-4:#a78bfa] dark:[--spectrum-series-5:#f472b6] dark:[--spectrum-series-6:#94a3b8] dark:[--spectrum-track:#26262b] dark:[--spectrum-chart-surface:#0a0a0a] dark:[--spectrum-chart-up:#34d399] dark:[--spectrum-chart-down:#fb7185]';
export const SERIES_COLORS = [
'var(--spectrum-series-1)',
'var(--spectrum-series-2)',
'var(--spectrum-series-3)',
'var(--spectrum-series-4)',
'var(--spectrum-series-5)',
'var(--spectrum-series-6)',
] as const;
export const TRACK = 'var(--spectrum-track)';
export const textHalo = {
paintOrder: 'stroke',
stroke: SURFACE,
strokeWidth: 3.5,
strokeLinejoin: 'round',
} as const satisfies React.CSSProperties;
export function intensityColor(t: number, hue = 'var(--spectrum-series-1)') {
const clamped = Math.max(0, Math.min(1, t));
if (clamped <= 0.001) return TRACK;
const weight = 14 + clamped * 86;
return `color-mix(in srgb, ${hue} ${weight.toFixed(0)}%, ${TRACK})`;
}
export function formatCount(value: number, digits = 1) {
if (Math.abs(value) < 1000) return String(Math.round(value));
return new Intl.NumberFormat('en-US', {
notation: 'compact',
maximumFractionDigits: digits,
}).format(value);
}
export function formatPct(value: number, digits = 1) {
return `${value.toFixed(digits)}%`;
}
export function onFillClass(intensity: number) {
return intensity > 0.55
? 'fill-white dark:fill-neutral-950'
: 'fill-neutral-900 dark:fill-white';
}
export type ChartStatus = 'ready' | 'loading' | 'empty' | 'error';
export type SkeletonVariant = 'bars' | 'line' | 'grid' | 'rows' | 'arc' | 'cards';
const SKELETON_BARS = [46, 72, 55, 83, 41, 68, 92, 57, 76, 49, 88, 63];
const SKELETON_ROWS = [92, 74, 86, 61, 79, 55];
function SkeletonShapes({
variant,
height,
mode,
reduce,
}: {
variant: SkeletonVariant;
height: number;
mode: 'pulse' | 'ghost';
reduce: boolean;
}) {
const animate = mode === 'pulse' && !reduce;
const breathe = (index: number): React.CSSProperties | undefined =>
animate
? { animation: `spectrum-sk-pulse 1.5s ease-in-out ${index * 120}ms infinite alternate` }
: undefined;
const block = 'rounded-md bg-black/[0.06] dark:bg-white/[0.08]';
if (variant === 'bars') {
return (
<div className="flex h-full items-end gap-2 pb-5 pt-3">
{SKELETON_BARS.map((h, i) => (
<div key={i} className={cn('flex-1', block)} style={{ height: `${h}%`, ...breathe(i) }} />
))}
</div>
);
}
if (variant === 'line') {
return (
<div className="relative flex h-full flex-col justify-between py-4">
{[0, 1, 2, 3].map((i) => (
<div key={i} className="h-px w-full bg-black/[0.05] dark:bg-white/[0.06]" />
))}
<svg
className="absolute inset-x-0 top-1/4 h-1/2 w-full"
preserveAspectRatio="none"
viewBox="0 0 100 40"
>
<path
d="M0,30 C12,10 22,34 34,22 C46,10 54,28 66,16 C78,6 88,20 100,8"
fill="none"
className="stroke-black/[0.1] dark:stroke-white/[0.12]"
strokeWidth={2}
vectorEffect="non-scaling-stroke"
style={breathe(1)}
/>
</svg>
</div>
);
}
if (variant === 'grid') {
return (
<div className="grid h-full grid-cols-12 grid-rows-6 gap-1.5 py-2">
{Array.from({ length: 72 }, (_, i) => (
<div
key={i}
className={cn('h-full w-full rounded-[3px]', block)}
style={breathe(i % 14)}
/>
))}
</div>
);
}
if (variant === 'rows') {
return (
<div className="flex h-full flex-col justify-evenly py-2">
{SKELETON_ROWS.map((w, i) => (
<div key={i} className={cn('h-4', block)} style={{ width: `${w}%`, ...breathe(i) }} />
))}
</div>
);
}
if (variant === 'cards') {
return (
<div className="grid h-full grid-cols-2 content-center gap-3 py-2 sm:grid-cols-4">
{[0, 1, 2, 3].map((i) => (
<div
key={i}
className="flex h-full min-h-16 flex-col justify-between gap-2 rounded-xl border border-black/[0.05] p-3 dark:border-white/[0.06]"
style={breathe(i)}
>
<div className={cn('h-2.5 w-1/2', block)} />
<div className={cn('h-5 w-3/4', block)} />
<div className={cn('h-6 w-full', block)} />
</div>
))}
</div>
);
}
return (
<div className="flex h-full items-center justify-center">
<div
className="rounded-full border-[14px] border-black/[0.06] dark:border-white/[0.08]"
style={{ width: height * 0.6, height: height * 0.6, ...breathe(0) }}
/>
</div>
);
}
export function ChartSkeleton({
variant = 'bars',
height = 300,
className,
}: {
variant?: SkeletonVariant;
height?: number;
className?: string;
}) {
const reduce = usePrefersReducedMotion();
return (
<div
className={cn('relative w-full overflow-hidden', className)}
style={{ height }}
aria-hidden
>
<Keyframes />
<SkeletonShapes variant={variant} height={height} mode="pulse" reduce={reduce} />
</div>
);
}
function StateShell({
height,
variant,
icon,
iconClassName,
title,
description,
action,
}: {
height: number;
variant: SkeletonVariant;
icon: React.ReactNode;
iconClassName?: string;
title: string;
description?: string;
action?: React.ReactNode;
}) {
const reduce = usePrefersReducedMotion();
return (
<div
className="relative flex w-full items-center justify-center overflow-hidden rounded-xl border border-black/[0.06] bg-black/[0.015] dark:border-white/[0.08] dark:bg-white/[0.02]"
style={{ height }}
role="status"
>
<Keyframes />
<div
aria-hidden
className="pointer-events-none absolute inset-x-5 inset-y-4 opacity-60 dark:opacity-50"
style={{
maskImage:
'radial-gradient(ellipse 62% 58% at 50% 50%, transparent 34%, black 78%)',
WebkitMaskImage:
'radial-gradient(ellipse 62% 58% at 50% 50%, transparent 34%, black 78%)',
}}
>
<SkeletonShapes variant={variant} height={height} mode="ghost" reduce={reduce} />
</div>
<div
className="relative flex max-w-[38ch] flex-col items-center gap-1 px-6 text-center"
style={reduce ? undefined : { animation: `spectrum-mc-enter 480ms ${EASE} both` }}
>
<span
className={cn(
'mb-2 flex size-10 items-center justify-center rounded-xl border border-black/[0.07] bg-white text-neutral-500 shadow-xs dark:border-white/[0.1] dark:bg-neutral-900 dark:text-neutral-400',
iconClassName,
)}
>
{icon}
</span>
<p className="text-[13px] font-medium text-neutral-900 dark:text-neutral-100">{title}</p>
{description ? (
<p className="text-[12px] leading-relaxed text-neutral-500 dark:text-neutral-400">
{description}
</p>
) : null}
{action ? <div className="mt-3">{action}</div> : null}
</div>
</div>
);
}
const actionClass =
'inline-flex items-center gap-1.5 rounded-full border border-black/10 bg-white px-3 py-1.5 text-[12px] font-medium text-neutral-900 shadow-xs transition-colors hover:bg-black/[0.03] focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-black/20 dark:border-white/12 dark:bg-white/[0.06] dark:text-white dark:hover:bg-white/[0.1] dark:focus-visible:ring-white/25';
export function ChartEmpty({
height = 300,
variant = 'line',
title = 'No data yet',
description = 'Once events start arriving this chart will fill in automatically.',
action,
}: {
height?: number;
variant?: SkeletonVariant;
title?: string;
description?: string;
action?: React.ReactNode;
}) {
return (
<StateShell
height={height}
variant={variant}
title={title}
description={description}
action={action}
icon={
<svg width="17" height="17" viewBox="0 0 24 24" fill="none" aria-hidden>
<path
d="M4 19h16M7 16V9m5 7V5m5 11v-4"
stroke="currentColor"
strokeWidth="1.7"
strokeLinecap="round"
/>
</svg>
}
/>
);
}
export function ChartError({
height = 300,
variant = 'line',
title = 'Could not load this chart',
description = 'The request failed. Check the connection and try again.',
onRetry,
retryLabel = 'Retry',
}: {
height?: number;
variant?: SkeletonVariant;
title?: string;
description?: string;
onRetry?: () => void;
retryLabel?: string;
}) {
return (
<StateShell
height={height}
variant={variant}
title={title}
description={description}
iconClassName="text-rose-500/90 dark:text-rose-400/90"
action={
onRetry ? (
<button type="button" onClick={onRetry} className={actionClass}>
<svg width="13" height="13" viewBox="0 0 24 24" fill="none" aria-hidden>
<path
d="M20 11A8 8 0 1 0 18 16M20 5v6h-6"
stroke="currentColor"
strokeWidth="1.9"
strokeLinecap="round"
strokeLinejoin="round"
/>
</svg>
{retryLabel}
</button>
) : null
}
icon={
<svg width="17" height="17" viewBox="0 0 24 24" fill="none" aria-hidden>
<path
d="M12 8v5m0 3.5v.5M10.3 3.9 2.6 17.3A2 2 0 0 0 4.3 20h15.4a2 2 0 0 0 1.7-2.7L13.7 3.9a2 2 0 0 0-3.4 0Z"
stroke="currentColor"
strokeWidth="1.6"
strokeLinecap="round"
strokeLinejoin="round"
/>
</svg>
}
/>
);
}
export function ChartState({
status = 'ready',
height = 300,
variant = 'bars',
empty,
error,
onRetry,
children,
}: {
status?: ChartStatus;
height?: number;
variant?: SkeletonVariant;
empty?: { title?: string; description?: string; action?: React.ReactNode };
error?: { title?: string; description?: string; retryLabel?: string };
onRetry?: () => void;
children: React.ReactNode;
}) {
if (status === 'loading') {
return (
<div aria-busy="true" aria-live="polite">
<ChartSkeleton variant={variant} height={height} />
<span className="sr-only">Loading chart data</span>
</div>
);
}
if (status === 'empty') return <ChartEmpty height={height} variant={variant} {...empty} />;
if (status === 'error') {
return <ChartError height={height} variant={variant} onRetry={onRetry} {...error} />;
}
return <>{children}</>;
}
export function useHoverIndexKeys({
count,
setIndex,
clear,
}: {
count: number;
setIndex: React.Dispatch<React.SetStateAction<number | null>>;
clear?: () => void;
}) {
return React.useCallback(
(event: React.KeyboardEvent) => {
const { key } = event;
if (key === 'Escape') {
event.preventDefault();
if (clear) clear();
else setIndex(null);
return;
}
if (key === 'Home' || key === 'End') {
event.preventDefault();
setIndex(key === 'Home' ? 0 : count - 1);
return;
}
if (key !== 'ArrowLeft' && key !== 'ArrowRight') return;
event.preventDefault();
const step = key === 'ArrowRight' ? 1 : -1;
setIndex((current) => {
const next = (current ?? count - 1) + step;
return Math.max(0, Math.min(count - 1, next));
});
},
[count, setIndex, clear],
);
}
export function ChartDataTable({
caption,
columns,
rows,
}: {
caption: string;
columns: string[];
rows: (string | number)[][];
}) {
/* The wrapper carries `sr-only`, not the table. `width: 1px` on a <table> is
a minimum, not a width — table layout still sizes to its content, so an
sr-only table stays 900px wide and widens the page on a phone even though
nothing of it is visible. A div clips it for real. */
return (
<div className="sr-only">
<table>
<caption>{caption}</caption>
<thead>
<tr>
{columns.map((column) => (
<th key={column} scope="col">
{column}
</th>
))}
</tr>
</thead>
<tbody>
{rows.map((row, index) => (
<tr key={index}>
{row.map((cell, cellIndex) =>
cellIndex === 0 ? (
<th key={cellIndex} scope="row">
{cell}
</th>
) : (
<td key={cellIndex}>{cell}</td>
),
)}
</tr>
))}
</tbody>
</table>
</div>
);
}
export function Stat({ ready, children }: { ready: boolean; children: React.ReactNode }) {
if (ready) return <>{children}</>;
return (
<span aria-hidden className="text-neutral-300 dark:text-neutral-600">
—
</span>
);
}
app/registry/charts/market-chart.tsx
'use client';
import * as React from 'react';
import { cn } from '@/lib/utils';
import {
type ChartStatus,
ChartState,
AAPL_MARKET,
BTC_MARKET,
type Candle,
DAY_MS,
Keyframes,
MARKET_RANGES,
type MarketRange,
MORPH_SAMPLES,
RollingNumber,
RangeSelector,
SOL_MARKET,
DATE_FULL,
DATE_SHORT,
formatAxisPrice,
formatMoney,
formatSignedPct,
marketVarsClassName,
monotonePath,
mulberry32,
niceTicks,
resample,
round2,
useElementWidth,
usePrefersReducedMotion,
useTween,
useTweenNumber,
} from './chart-engine';
const NO_TICKS: Candle[] = [];
const PAD = { top: 12, right: 60, bottom: 22, left: 12 };
const VOLUME_SHARE = 0.2;
const VOLUME_GAP = 12;
export interface MarketChartProps {
className?: string;
data?: Candle[];
symbol?: string;
name?: string;
variant?: 'candles' | 'area';
showVolume?: boolean;
hollowUp?: boolean;
ranges?: MarketRange[];
defaultRange?: string;
showRangeSelector?: boolean;
live?: boolean;
height?: number;
compactPrice?: boolean;
status?: ChartStatus;
onRetry?: () => void;
}
export function MarketChart({
className,
data = SOL_MARKET,
symbol = 'SOL',
name = 'Solana',
variant = 'candles',
showVolume = true,
hollowUp = false,
ranges = MARKET_RANGES,
defaultRange = '3M',
showRangeSelector = true,
live = false,
height = 380,
compactPrice = false,
status = 'ready',
onRetry,
}: MarketChartProps) {
const reduce = usePrefersReducedMotion();
const [wrapRef, width] = useElementWidth<HTMLDivElement>();
const [rangeLabel, setRangeLabel] = React.useState(
() => ranges.find((r) => r.label === defaultRange)?.label ?? ranges[ranges.length - 1].label,
);
const [hoverIndex, setHoverIndex] = React.useState<number | null>(null);
const [hoverY, setHoverY] = React.useState<number | null>(null);
const [tickState, setTicks] = React.useState<Candle[]>([]);
const ticks = live ? tickState : NO_TICKS;
const [flash, setFlash] = React.useState<'up' | 'down' | null>(null);
React.useEffect(() => {
if (!live) return;
const rand = mulberry32(0x5eed);
let last = data[data.length - 1];
const id = window.setInterval(() => {
const shock = (rand() - 0.48) * 0.018;
const close = round2(Math.max(0.01, last.close * (1 + shock)));
const next: Candle = {
t: last.t + DAY_MS,
open: last.close,
high: round2(Math.max(last.close, close) * (1 + rand() * 0.006)),
low: round2(Math.min(last.close, close) * (1 - rand() * 0.006)),
close,
volume: Math.round((0.6 + rand()) * 1_000_000),
};
last = next;
setFlash(close >= next.open ? 'up' : 'down');
setTicks((prev) => [...prev, next].slice(-120));
}, 1600);
return () => window.clearInterval(id);
}, [live, data]);
React.useEffect(() => {
if (!flash) return;
const id = window.setTimeout(() => setFlash(null), 620);
return () => window.clearTimeout(id);
}, [flash, ticks.length]);
const series = React.useMemo(() => (ticks.length ? [...data, ...ticks] : data), [data, ticks]);
const range = ranges.find((r) => r.label === rangeLabel) ?? ranges[ranges.length - 1];
const view = React.useMemo(() => {
const bars = range.bars;
if (bars == null || bars >= series.length) return series;
return series.slice(series.length - bars);
}, [series, range.bars]);
const n = view.length;
const w = Math.max(width, 260);
const h = height;
const plotX0 = PAD.left;
const plotX1 = w - PAD.right;
const plotW = Math.max(1, plotX1 - plotX0);
const innerTop = PAD.top;
const innerBottom = h - PAD.bottom;
const volH = showVolume ? Math.round((innerBottom - innerTop) * VOLUME_SHARE) : 0;
const priceY0 = innerTop;
const priceY1 = innerBottom - (showVolume ? volH + VOLUME_GAP : 0);
const volY0 = innerBottom - volH;
const volY1 = innerBottom;
const priceH = Math.max(1, priceY1 - priceY0);
const step = plotW / Math.max(n, 1);
const bodyW = Math.max(1, Math.min(step * 0.68, 18));
const cx = React.useCallback((i: number) => plotX0 + step * (i + 0.5), [plotX0, step]);
const rawDomain = React.useMemo(() => {
if (!n) return [0, 1] as const;
let lo = Infinity;
let hi = -Infinity;
for (const c of view) {
const low = variant === 'area' ? c.close : c.low;
const high = variant === 'area' ? c.close : c.high;
if (low < lo) lo = low;
if (high > hi) hi = high;
}
const pad = (hi - lo) * 0.12 || Math.abs(hi) * 0.02 || 1;
return [lo - pad, hi + pad] as const;
}, [view, n, variant]);
const [domLo, domHi] = useTween([rawDomain[0], rawDomain[1]], {
duration: 560,
enabled: !reduce,
});
const priceY = React.useCallback(
(v: number) => {
const span = domHi - domLo || 1;
return priceY1 - ((v - domLo) / span) * priceH;
},
[domHi, domLo, priceY1, priceH],
);
const priceAt = React.useCallback(
(y: number) => domLo + ((priceY1 - y) / priceH) * (domHi - domLo),
[domLo, domHi, priceY1, priceH],
);
const maxVolume = React.useMemo(
() => view.reduce((max, c) => Math.max(max, c.volume), 1),
[view],
);
const closes = React.useMemo(() => view.map((c) => c.close), [view]);
const morphed = useTween(
React.useMemo(() => resample(closes), [closes]),
{ duration: 560, enabled: !reduce && variant === 'area' },
);
const first = view[0];
const last = view[n - 1];
const active = hoverIndex != null ? view[hoverIndex] : null;
const shown = active ?? last;
const baseline = first?.close ?? 0;
const delta = baseline ? ((shown?.close ?? 0) - baseline) / baseline * 100 : 0;
const up = delta >= 0;
const dirColor = up ? 'var(--spectrum-chart-up)' : 'var(--spectrum-chart-down)';
const lastUp = last ? last.close >= last.open : true;
const lastColor = lastUp ? 'var(--spectrum-chart-up)' : 'var(--spectrum-chart-down)';
const displayPrice = useTweenNumber(shown?.close ?? 0, {
duration: 260,
enabled: !reduce && hoverIndex == null,
});
const svgRef = React.useRef<SVGSVGElement | null>(null);
const pointerToIndex = React.useCallback(
(clientX: number, clientY: number) => {
const svg = svgRef.current;
if (!svg) return;
const box = svg.getBoundingClientRect();
const x = ((clientX - box.left) / box.width) * w;
const y = ((clientY - box.top) / box.height) * h;
const i = Math.floor((x - plotX0) / step);
setHoverIndex(Math.max(0, Math.min(n - 1, i)));
setHoverY(Math.max(priceY0, Math.min(priceY1, y)));
},
[w, h, plotX0, step, n, priceY0, priceY1],
);
const clearHover = React.useCallback(() => {
setHoverIndex(null);
setHoverY(null);
}, []);
const onKeyDown = React.useCallback(
(event: React.KeyboardEvent) => {
if (event.key !== 'ArrowLeft' && event.key !== 'ArrowRight' && event.key !== 'Escape') return;
event.preventDefault();
if (event.key === 'Escape') return clearHover();
const dir = event.key === 'ArrowRight' ? 1 : -1;
setHoverIndex((current) => {
const next = (current ?? n - 1) + dir;
return Math.max(0, Math.min(n - 1, next));
});
setHoverY(null);
},
[n, clearHover],
);
const priceTicks = React.useMemo(() => niceTicks(domLo, domHi, 5), [domLo, domHi]);
const timeTicks = React.useMemo(() => {
if (!n) return [];
const want = Math.max(2, Math.min(6, Math.floor(plotW / 96)));
const gap = Math.max(1, Math.floor((n - 1) / (want - 1 || 1)));
const out: number[] = [];
for (let i = 0; i < n; i += gap) out.push(i);
const minGap = 62;
const xOf = (i: number) => plotX0 + (plotW / Math.max(n, 1)) * (i + 0.5);
if (out[out.length - 1] !== n - 1) {
while (out.length && xOf(n - 1) - xOf(out[out.length - 1]) < minGap) out.pop();
out.push(n - 1);
}
return out;
}, [n, plotW, plotX0]);
const uid = React.useId().replace(/:/g, '');
const ready = width > 0;
const areaPoints = React.useMemo(() => {
const values = morphed.length === MORPH_SAMPLES ? morphed : resample(closes);
return values.map((v, i) => ({
x: plotX0 + (i / (values.length - 1 || 1)) * plotW,
y: priceY(v),
}));
}, [morphed, closes, plotX0, plotW, priceY]);
const linePath = React.useMemo(
() => (variant === 'area' ? monotonePath(areaPoints) : ''),
[variant, areaPoints],
);
const baselineY = priceY(baseline);
const areaPath = React.useMemo(() => {
if (variant !== 'area' || !linePath) return '';
return `${linePath}L${plotX1},${baselineY}L${plotX0},${baselineY}Z`;
}, [variant, linePath, plotX0, plotX1, baselineY]);
const staggerFor = (i: number) => (n <= 1 ? 0 : (i / (n - 1)) * 340);
const introKey = `${rangeLabel}-${variant}`;
return (
<div
ref={wrapRef}
className={cn(
'flex w-full flex-col text-neutral-400 dark:text-neutral-500',
marketVarsClassName,
className,
)}
>
<Keyframes />
<div className="mb-3 flex flex-wrap items-start justify-between gap-x-4 gap-y-3">
<div className="min-w-0">
<div className="flex items-baseline gap-2">
<span className="font-mono text-[12px] font-medium tracking-wide text-neutral-950 dark:text-white">
{symbol}
</span>
<span className="truncate text-[12px] text-neutral-500 dark:text-neutral-400">{name}</span>
{live ? (
<span className="inline-flex items-center gap-1 rounded-full bg-black/[0.05] px-1.5 py-0.5 font-mono text-[9px] uppercase tracking-widest text-neutral-500 dark:bg-white/[0.08] dark:text-neutral-400">
<span
className="size-1.5 rounded-full"
style={{
background: 'var(--spectrum-chart-up)',
animation: reduce ? undefined : 'spectrum-mc-fade 1.1s ease-in-out infinite alternate',
}}
/>
Live
</span>
) : null}
</div>
<div className="mt-1 flex items-end gap-2.5">
<RollingNumber
value={hoverIndex != null ? (shown?.close ?? 0) : displayPrice}
format={(v) => formatMoney(v, compactPrice)}
animate={!reduce}
className={cn(
'font-mono text-[26px] font-medium text-neutral-950 transition-colors duration-300 dark:text-white',
)}
/>
<span
className="mb-1 rounded-md px-1.5 py-0.5 font-mono text-[12px] tabular-nums transition-colors duration-300"
style={{
color: dirColor,
background: flash
? `color-mix(in srgb, ${dirColor} 16%, transparent)`
: 'transparent',
}}
>
{formatSignedPct(delta)}
</span>
</div>
<div
className="mt-1.5 flex h-4 flex-wrap items-center gap-x-3 font-mono text-[10.5px] tabular-nums transition-opacity duration-200"
style={{ opacity: active ? 1 : 0 }}
aria-hidden={!active}
>
{active ? (
<>
<span className="text-neutral-400 dark:text-neutral-500">
{DATE_FULL.format(active.t)}
</span>
{(['open', 'high', 'low', 'close'] as const).map((key) => (
<span key={key} className="text-neutral-500 dark:text-neutral-400">
{key[0].toUpperCase()}{' '}
<span
className="text-neutral-950 dark:text-white"
style={{ color: key === 'close' ? dirColor : undefined }}
>
{formatMoney(active[key], compactPrice)}
</span>
</span>
))}
<span className="text-neutral-500 dark:text-neutral-400">
V{' '}
<span className="text-neutral-950 dark:text-white">
{formatMoney(active.volume, true).replace('$', '')}
</span>
</span>
</>
) : null}
</div>
</div>
{showRangeSelector ? (
<RangeSelector
ranges={ranges}
value={rangeLabel}
onChange={setRangeLabel}
reduce={reduce}
/>
) : null}
</div>
<ChartState
status={status}
height={height}
variant="bars"
empty={{ title: 'No price data', description: 'Point the chart at a candle feed and it will render as soon as bars arrive.' }}
onRetry={onRetry}
>
<div className="relative w-full" style={{ height }}>
{!ready ? null : (
<svg
ref={svgRef}
width={w}
height={h}
viewBox={`0 0 ${w} ${h}`}
className="block w-full touch-pan-y select-none overflow-visible"
role="img"
aria-label={`${symbol} ${name} price chart, ${rangeLabel} range. ${formatMoney(
last?.close ?? 0,
)}, ${formatSignedPct(delta)}.`}
tabIndex={0}
onKeyDown={onKeyDown}
onPointerMove={(e) => pointerToIndex(e.clientX, e.clientY)}
onPointerDown={(e) => pointerToIndex(e.clientX, e.clientY)}
onPointerLeave={clearHover}
onBlur={clearHover}
>
<defs>
<linearGradient id={`${uid}-up`} x1="0" y1="0" x2="0" y2="1">
<stop offset="0%" stopColor="var(--spectrum-chart-up)" stopOpacity={0.28} />
<stop offset="100%" stopColor="var(--spectrum-chart-up)" stopOpacity={0} />
</linearGradient>
<linearGradient id={`${uid}-down`} x1="0" y1="0" x2="0" y2="1">
<stop offset="0%" stopColor="var(--spectrum-chart-down)" stopOpacity={0} />
<stop offset="100%" stopColor="var(--spectrum-chart-down)" stopOpacity={0.28} />
</linearGradient>
<clipPath id={`${uid}-above`}>
<rect x={plotX0} y={priceY0 - 40} width={plotW} height={Math.max(0, baselineY - priceY0 + 40)} />
</clipPath>
<clipPath id={`${uid}-below`}>
<rect x={plotX0} y={baselineY} width={plotW} height={Math.max(0, priceY1 - baselineY + 40)} />
</clipPath>
</defs>
<g shapeRendering="crispEdges">
{priceTicks.map((tick) => {
const y = priceY(tick);
if (y < priceY0 - 1 || y > priceY1 + 1) return null;
return (
<line
key={tick}
x1={plotX0}
x2={plotX1}
y1={y}
y2={y}
stroke="currentColor"
strokeOpacity={0.13}
strokeDasharray="2 4"
/>
);
})}
</g>
<g className="font-mono">
{priceTicks.map((tick) => {
const y = priceY(tick);
if (y < priceY0 - 1 || y > priceY1 + 1) return null;
const collides =
(last != null && Math.abs(y - priceY(last.close)) < 13) ||
(hoverY != null && Math.abs(y - hoverY) < 13);
if (collides) return null;
return (
<text
key={tick}
x={plotX1 + 8}
y={y}
dominantBaseline="middle"
fontSize={10.5}
fill="currentColor"
className="tabular-nums"
>
{formatAxisPrice(tick)}
</text>
);
})}
</g>
<g className="font-mono">
{timeTicks.map((i) => {
const candle = view[i];
if (!candle) return null;
const x = Math.max(plotX0 + 14, Math.min(plotX1 - 14, cx(i)));
return (
<text
key={i}
x={x}
y={innerBottom + 13}
textAnchor="middle"
fontSize={10.5}
fill="currentColor"
className="tabular-nums"
>
{DATE_SHORT.format(candle.t)}
</text>
);
})}
</g>
{hoverIndex != null && view[hoverIndex] ? (
<rect
x={cx(hoverIndex) - step / 2}
y={priceY0}
width={step}
height={innerBottom - priceY0}
fill="currentColor"
opacity={0.05}
/>
) : null}
{variant === 'area' ? (
<g key={introKey}>
<path
d={areaPath}
fill={`url(#${uid}-up)`}
clipPath={`url(#${uid}-above)`}
style={
reduce ? undefined : { animation: 'spectrum-mc-fade 620ms ease-out both' }
}
/>
<path
d={areaPath}
fill={`url(#${uid}-down)`}
clipPath={`url(#${uid}-below)`}
style={
reduce ? undefined : { animation: 'spectrum-mc-fade 620ms ease-out both' }
}
/>
<line
x1={plotX0}
x2={plotX1}
y1={baselineY}
y2={baselineY}
stroke="currentColor"
strokeOpacity={0.35}
strokeDasharray="3 3"
/>
<path
d={linePath}
fill="none"
stroke="var(--spectrum-chart-up)"
strokeWidth={2}
strokeLinecap="round"
strokeLinejoin="round"
clipPath={`url(#${uid}-above)`}
pathLength={1}
style={
reduce
? undefined
: {
strokeDasharray: 1,
animation: 'spectrum-mc-draw 900ms cubic-bezier(0.22, 1, 0.36, 1) both',
}
}
/>
<path
d={linePath}
fill="none"
stroke="var(--spectrum-chart-down)"
strokeWidth={2}
strokeLinecap="round"
strokeLinejoin="round"
clipPath={`url(#${uid}-below)`}
pathLength={1}
style={
reduce
? undefined
: {
strokeDasharray: 1,
animation: 'spectrum-mc-draw 900ms cubic-bezier(0.22, 1, 0.36, 1) both',
}
}
/>
</g>
) : (
<g key={introKey}>
{view.map((candle, i) => {
const isUp = candle.close >= candle.open;
const color = isUp ? 'var(--spectrum-chart-up)' : 'var(--spectrum-chart-down)';
const x = cx(i);
const yHigh = priceY(candle.high);
const yLow = priceY(candle.low);
const yOpen = priceY(candle.open);
const yClose = priceY(candle.close);
const top = Math.min(yOpen, yClose);
const bodyH = Math.max(1, Math.abs(yClose - yOpen));
const dim = hoverIndex != null && hoverIndex !== i;
const hollow = hollowUp && isUp && bodyH > 2;
return (
<g
key={candle.t}
style={{
opacity: dim ? 0.32 : 1,
transition: reduce ? undefined : 'opacity 160ms ease-out',
transformBox: 'fill-box',
transformOrigin: 'bottom center',
animation: reduce
? undefined
: `spectrum-mc-rise 420ms cubic-bezier(0.22, 1, 0.36, 1) ${staggerFor(i)}ms both`,
}}
>
<line
x1={x}
x2={x}
y1={yHigh}
y2={yLow}
stroke={color}
strokeWidth={Math.min(1.5, Math.max(1, bodyW * 0.14))}
/>
<rect
x={x - bodyW / 2}
y={top}
width={bodyW}
height={bodyH}
rx={Math.min(1.5, bodyW * 0.18)}
fill={hollow ? 'var(--spectrum-chart-surface)' : color}
stroke={color}
strokeWidth={hollow ? 1.25 : 0}
/>
</g>
);
})}
</g>
)}
{showVolume ? (
<g key={`${introKey}-vol`}>
{view.map((candle, i) => {
const isUp = candle.close >= candle.open;
const barH = Math.max(1, (candle.volume / maxVolume) * volH * 0.88);
const dim = hoverIndex != null && hoverIndex !== i;
return (
<rect
key={candle.t}
x={cx(i) - bodyW / 2}
y={volY1 - barH}
width={bodyW}
height={barH}
rx={Math.min(1.5, bodyW * 0.18)}
fill={isUp ? 'var(--spectrum-chart-up)' : 'var(--spectrum-chart-down)'}
opacity={dim ? 0.12 : 0.3}
style={{
transition: reduce ? undefined : 'opacity 160ms ease-out',
transformBox: 'fill-box',
transformOrigin: 'bottom center',
animation: reduce
? undefined
: `spectrum-mc-rise 420ms cubic-bezier(0.22, 1, 0.36, 1) ${staggerFor(i)}ms both`,
}}
/>
);
})}
<line
x1={plotX0}
x2={plotX1}
y1={volY0 - VOLUME_GAP / 2}
y2={volY0 - VOLUME_GAP / 2}
stroke="currentColor"
strokeOpacity={0.1}
shapeRendering="crispEdges"
/>
</g>
) : null}
{last ? (
<g>
<line
x1={plotX0}
x2={plotX1}
y1={priceY(last.close)}
y2={priceY(last.close)}
stroke={lastColor}
strokeOpacity={0.55}
strokeWidth={1}
strokeDasharray="4 4"
/>
<rect
x={plotX1 + 3}
y={priceY(last.close) - 9}
width={PAD.right - 8}
height={18}
rx={4}
fill={lastColor}
/>
<text
x={plotX1 + 3 + (PAD.right - 8) / 2}
y={priceY(last.close)}
textAnchor="middle"
dominantBaseline="middle"
fontSize={10.5}
fontWeight={600}
fill="var(--spectrum-chart-surface)"
className="font-mono tabular-nums"
>
{formatAxisPrice(last.close)}
</text>
{live && !reduce ? (
<>
<circle
cx={cx(n - 1)}
cy={priceY(last.close)}
r={4}
fill={lastColor}
style={{ animation: 'spectrum-mc-ping 1.6s ease-out infinite' }}
/>
<circle cx={cx(n - 1)} cy={priceY(last.close)} r={3} fill={lastColor} />
</>
) : null}
</g>
) : null}
{hoverIndex != null && view[hoverIndex] ? (
<g
style={{
transition: reduce ? undefined : 'transform 110ms cubic-bezier(0.22, 1, 0.36, 1)',
}}
>
<line
x1={cx(hoverIndex)}
x2={cx(hoverIndex)}
y1={priceY0}
y2={innerBottom}
stroke="currentColor"
strokeOpacity={0.45}
strokeDasharray="3 3"
/>
{hoverY != null ? (
<>
<line
x1={plotX0}
x2={plotX1}
y1={hoverY}
y2={hoverY}
stroke="currentColor"
strokeOpacity={0.45}
strokeDasharray="3 3"
/>
<rect
x={plotX1 + 3}
y={hoverY - 9}
width={PAD.right - 8}
height={18}
rx={4}
className="fill-neutral-900 dark:fill-white"
/>
<text
x={plotX1 + 3 + (PAD.right - 8) / 2}
y={hoverY}
textAnchor="middle"
dominantBaseline="middle"
fontSize={10.5}
fontWeight={600}
className="fill-white font-mono tabular-nums dark:fill-neutral-950"
>
{formatAxisPrice(priceAt(hoverY))}
</text>
</>
) : null}
<g
transform={`translate(${Math.max(
plotX0 + 28,
Math.min(plotX1 - 28, cx(hoverIndex)),
)}, ${innerBottom + 4})`}
>
<rect
x={-27}
y={0}
width={54}
height={16}
rx={4}
className="fill-neutral-900 dark:fill-white"
/>
<text
x={0}
y={8.5}
textAnchor="middle"
dominantBaseline="middle"
fontSize={10}
fontWeight={600}
className="fill-white font-mono tabular-nums dark:fill-neutral-950"
>
{DATE_SHORT.format(view[hoverIndex].t)}
</text>
</g>
<circle
cx={cx(hoverIndex)}
cy={priceY(view[hoverIndex].close)}
r={4.5}
fill="var(--spectrum-chart-surface)"
stroke={view[hoverIndex].close >= view[hoverIndex].open
? 'var(--spectrum-chart-up)'
: 'var(--spectrum-chart-down)'}
strokeWidth={2}
/>
</g>
) : null}
</svg>
)}
</div>
</ChartState>
</div>
);
}
export function DefaultMarketChart(props: MarketChartProps) {
return <MarketChart {...props} />;
}
export function StockMarketChart(props: MarketChartProps) {
return <MarketChart data={AAPL_MARKET} symbol="AAPL" name="Apple Inc." {...props} />;
}
export function BitcoinMarketChart(props: MarketChartProps) {
return (
<MarketChart data={BTC_MARKET} symbol="BTC" name="Bitcoin" compactPrice hollowUp {...props} />
);
}
export function AreaMarketChart(props: MarketChartProps) {
return <MarketChart variant="area" showVolume={false} defaultRange="1Y" {...props} />;
}
export function LiveMarketChart(props: MarketChartProps) {
return <MarketChart live defaultRange="1M" {...props} />;
}
export function CompactMarketChart(props: MarketChartProps) {
return (
<MarketChart showVolume={false} showRangeSelector={false} height={220} defaultRange="3M" {...props} />
);
}
app/registry/charts/chart-data.tsx
'use client';
import * as React from 'react';
import { cn } from '@/lib/utils';
import {
type Candle,
type ChartStatus,
DAY_MS,
SOL_MARKET,
mulberry32,
round2,
seriesVarsClassName,
} from './chart-engine';
import { MarketChart } from './market-chart';
type Outcome = 'ok' | 'empty' | 'fail';
function fakeFetch(outcome: Outcome, signal?: AbortSignal): Promise<Candle[]> {
return new Promise((resolve, reject) => {
const id = setTimeout(() => {
if (outcome === 'fail') reject(new Error('503 from /api/candles'));
else resolve(outcome === 'empty' ? [] : SOL_MARKET.slice(-120));
}, 1100);
signal?.addEventListener('abort', () => {
clearTimeout(id);
reject(new DOMException('Aborted', 'AbortError'));
});
});
}
export function useChartData(outcome: Outcome) {
const [nonce, setNonce] = React.useState(0);
const requestKey = `${outcome}:${nonce}`;
const [result, setResult] = React.useState<{
key: string;
data: Candle[];
status: ChartStatus;
} | null>(null);
React.useEffect(() => {
const controller = new AbortController();
let live = true;
fakeFetch(outcome, controller.signal)
.then((rows) => {
if (!live) return;
setResult({ key: requestKey, data: rows, status: rows.length ? 'ready' : 'empty' });
})
.catch((error: unknown) => {
if (!live || (error as Error).name === 'AbortError') return;
setResult({ key: requestKey, data: [], status: 'error' });
});
return () => {
live = false;
controller.abort();
};
}, [outcome, requestKey]);
const fresh = result?.key === requestKey ? result : null;
return {
data: fresh?.data ?? [],
status: fresh?.status ?? ('loading' as ChartStatus),
reload: React.useCallback(() => setNonce((n) => n + 1), []),
};
}
function OutcomePicker({
value,
onChange,
}: {
value: Outcome;
onChange: (next: Outcome) => void;
}) {
return (
<div className="mb-3 inline-flex items-center gap-0.5 rounded-full bg-black/[0.045] p-0.5 dark:bg-white/[0.07]">
{(['ok', 'empty', 'fail'] as Outcome[]).map((option) => (
<button
key={option}
type="button"
onClick={() => onChange(option)}
aria-pressed={value === option}
className={cn(
'rounded-full px-3 py-1 font-mono text-[11px] leading-none transition-colors',
'focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-black/20 dark:focus-visible:ring-white/25',
value === option
? 'bg-white text-neutral-950 shadow-sm dark:bg-white/12 dark:text-white'
: 'text-neutral-500 hover:text-neutral-800 dark:text-neutral-400 dark:hover:text-neutral-200',
)}
>
server returns {option}
</button>
))}
</div>
);
}
export function FetchRecipe({ className }: { className?: string }) {
const [outcome, setOutcome] = React.useState<Outcome>('ok');
const { data, status, reload } = useChartData(outcome);
return (
<div className={cn('w-full', seriesVarsClassName, className)}>
<OutcomePicker value={outcome} onChange={setOutcome} />
<MarketChart
data={data}
status={status}
onRetry={reload}
symbol="SOL"
name="from /api/candles"
height={320}
defaultRange="3M"
/>
</div>
);
}
export function toChartStatus({
isLoading,
error,
rows,
}: {
isLoading: boolean;
error?: unknown;
rows?: readonly unknown[] | null;
}): ChartStatus {
if (isLoading) return 'loading';
if (error) return 'error';
if (!rows || rows.length === 0) return 'empty';
return 'ready';
}
export function QueryRecipe({ className }: { className?: string }) {
const [isLoading, setLoading] = React.useState(true);
React.useEffect(() => {
const id = window.setTimeout(() => setLoading(false), 1200);
return () => window.clearTimeout(id);
}, []);
const rows = isLoading ? [] : SOL_MARKET.slice(-90);
const status = toChartStatus({ isLoading, rows });
return (
<div className={cn('w-full', seriesVarsClassName, className)}>
<MarketChart
data={rows}
status={status}
symbol="SOL"
name="via useSWR"
height={320}
defaultRange="3M"
showRangeSelector={false}
/>
</div>
);
}
export function StreamRecipe({ className }: { className?: string }) {
const [data, setData] = React.useState<Candle[]>(() => SOL_MARKET.slice(-60));
React.useEffect(() => {
const rand = mulberry32(0xfeed);
const id = window.setInterval(() => {
setData((prev) => {
const last = prev[prev.length - 1];
const close = round2(Math.max(0.01, last.close * (1 + (rand() - 0.47) * 0.02)));
const next: Candle = {
t: last.t + DAY_MS,
open: last.close,
high: round2(Math.max(last.close, close) * (1 + rand() * 0.005)),
low: round2(Math.min(last.close, close) * (1 - rand() * 0.005)),
close,
volume: Math.round((0.6 + rand()) * 1_000_000),
};
return [...prev, next].slice(-90);
});
}, 1500);
return () => window.clearInterval(id);
}, []);
return (
<div className={cn('w-full', seriesVarsClassName, className)}>
<MarketChart
data={data}
symbol="SOL"
name="streaming"
height={320}
defaultRange="1M"
showRangeSelector={false}
/>
</div>
);
}
export function DefaultChartData(props: { className?: string }) {
return <FetchRecipe {...props} />;
}