setSym(e.target.value)}
style={{ background: 'transparent', color: '#f5f5f7', border: 0, outline: 0, padding: 0,
fontSize: 17, fontWeight: 700, fontFamily: 'inherit', cursor: 'pointer', appearance: 'none' }}>
{TICKER_SYMBOLS.map(s => {s} )}
{data?.name || (loading ? 'loading…' : sym)}
{price ? `$${price.toFixed(2)}` : '-'}
{error ? (
↻ Reload
) : price ? (
{up ? '▲' : '▼'} {up ? '+' : ''}{change.toFixed(2)} ({up ? '+' : ''}{pct.toFixed(2)}%)
) : (
-
)}
1D
{series.length > 1 ? (
) : (
↻
{loading ? 'Loading…' : 'Reload chart'}
)}
);
};
// ─── Live order book (Coinbase WebSocket level2) ─────────────────────────────
const COINBASE_PAIRS = [
{ id: 'BTC-USD', name: 'Bitcoin' },
{ id: 'ETH-USD', name: 'Ethereum' },
{ id: 'SOL-USD', name: 'Solana' },
];
const BOOK_DEPTH = 8;
const OrderBookWidget = ({ top = 442, right = 18, w = 300, h = 340 }) => {
const [pair, setPair] = uS('BTC-USD');
const [, setTick] = uS(0);
const [status, setStatus] = uS('connecting'); // connecting | live | error | closed
const bidsRef = uRf(new Map());
const asksRef = uRf(new Map());
const lastRenderRef = uRf(0);
const wsRef = uRf(null);
uE(() => {
bidsRef.current = new Map();
asksRef.current = new Map();
setStatus('connecting');
setTick(t => t + 1);
const ws = new WebSocket('wss://ws-feed.exchange.coinbase.com');
wsRef.current = ws;
ws.onopen = () => {
ws.send(JSON.stringify({
type: 'subscribe',
product_ids: [pair],
channels: ['level2_batch'],
}));
};
ws.onmessage = (e) => {
let msg;
try { msg = JSON.parse(e.data); } catch { return; }
if (msg.type === 'snapshot') {
bidsRef.current = new Map(msg.bids.map(([p, s]) => [p, parseFloat(s)]));
asksRef.current = new Map(msg.asks.map(([p, s]) => [p, parseFloat(s)]));
setStatus('live');
setTick(t => t + 1);
} else if (msg.type === 'l2update') {
for (const [side, price, size] of (msg.changes || [])) {
const map = side === 'buy' ? bidsRef.current : asksRef.current;
const sz = parseFloat(size);
if (sz === 0) map.delete(price);
else map.set(price, sz);
}
// throttle re-renders to ~10fps
const now = performance.now();
if (now - lastRenderRef.current > 100) {
lastRenderRef.current = now;
setTick(t => t + 1);
}
} else if (msg.type === 'error') {
setStatus('error');
}
};
ws.onerror = () => setStatus('error');
ws.onclose = () => setStatus(s => s === 'error' ? s : 'closed');
return () => { try { ws.close(); } catch {} };
}, [pair]);
// Top N levels each side
const topAsks = [...asksRef.current.entries()]
.map(([p, s]) => [parseFloat(p), s])
.filter(([, s]) => s > 0)
.sort((a, b) => a[0] - b[0])
.slice(0, BOOK_DEPTH);
const topBids = [...bidsRef.current.entries()]
.map(([p, s]) => [parseFloat(p), s])
.filter(([, s]) => s > 0)
.sort((a, b) => b[0] - a[0])
.slice(0, BOOK_DEPTH);
const maxSize = Math.max(
1,
...topAsks.map(([, s]) => s),
...topBids.map(([, s]) => s),
);
const bestAsk = topAsks[0]?.[0];
const bestBid = topBids[0]?.[0];
const spread = bestAsk && bestBid ? bestAsk - bestBid : 0;
const mid = bestAsk && bestBid ? (bestAsk + bestBid) / 2 : 0;
const fmt = (n, d = 2) => Number(n).toLocaleString(undefined, { minimumFractionDigits: d, maximumFractionDigits: d });
const dotColor =
status === 'live' ? '#30d158' :
status === 'connecting' ? '#ffd60a' :
'#ff453a';
const Row = ({ price, size, side }) => {
const fill = (size / maxSize) * 100;
const c = side === 'ask' ? '#ff453a' : '#30d158';
return (
setPair(e.target.value)} style={{
background: 'transparent', color: '#f5f5f7', border: 0, outline: 0, padding: 0,
fontSize: 14, fontWeight: 700, fontFamily: 'inherit', cursor: 'pointer', appearance: 'none',
}}>
{COINBASE_PAIRS.map(p => {p.id} )}
live order book · coinbase
price size
{/* Asks (descending so closer to mid is at the bottom of the asks block) */}
{topAsks.map(([p, s]) => |
)}
{/* Spread */}
{mid ? fmt(mid) : '-'}
{spread ? `spread ${fmt(spread)}` : 'awaiting feed'}
{/* Bids */}
{topBids.map(([p, s]) => |
)}
);
};
// ─── Generating / Token stream ───────────────────────────────────────────────
// Split a string into typewriter tokens (words keep their trailing space; newlines
// stay their own token) so these samples can be built from JH_DATA instead of
// hardcoded - the "currently" and "reach out" lines used to drift out of date.
const tokenize = (s) => s.match(/\n+|[^\s\n]+[ \t]?/g) || [s];
const JD = window.JH_DATA || {};
const SAMPLES = [
['Hire', ' Justin', '.', '\n\n', 'He', ' ships', ' AI', ' systems', ' that', ' actually', ' work', '.'],
tokenize([
(JD.status && JD.status.line) || 'Building AI systems.',
'\n',
[(JD.status && JD.status.type), JD.location].filter(Boolean).join(' · '),
].join('')),
['Looking', ' for', ':', ' applied', ' AI', ',', ' agents', ',', ' or', ' anything', ' weird', ' and', ' new', '.'],
tokenize(`Reach out: ${(JD.links && JD.links.email && JD.links.email.label) || 'jjhatch03@gmail.com'}`),
];
const TokenStreamWidget = ({ top = 230, right = 18 }) => {
const [si, setSi] = uS(0);
const [ti, setTi] = uS(0);
uE(() => {
const sample = SAMPLES[si];
if (ti < sample.length) {
const id = setTimeout(() => setTi(ti + 1), 90 + Math.random() * 110);
return () => clearTimeout(id);
} else {
const id = setTimeout(() => { setSi((si + 1) % SAMPLES.length); setTi(0); }, 2400);
return () => clearTimeout(id);
}
}, [ti, si]);
const tokens = SAMPLES[si].slice(0, ti);
return (
Generating
claude · 124 tok/s
{tokens.map((tok, i) => (
{tok}
))}
);
};
// ─── Shared widget shell ─────────────────────────────────────────────────────
const widgetShell = {
background: 'rgba(28,28,30,0.55)',
backdropFilter: 'blur(40px) saturate(180%)',
WebkitBackdropFilter: 'blur(40px) saturate(180%)',
borderRadius: 20,
border: '0.5px solid rgba(255,255,255,0.5)',
boxShadow: '0 12px 36px rgba(0,0,0,0.22), inset 0 0.5px 0 rgba(255,255,255,0.6)',
color: '#f5f5f7',
fontFamily: '-apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif',
textDecoration: 'none',
cursor: 'pointer',
display: 'flex',
flexDirection: 'column',
boxSizing: 'border-box',
overflow: 'hidden',
};
// ─── GitHub widget ───────────────────────────────────────────────────────────
const GitHubMark = ({ size = 22 }) => (