// Direction B: Bold data-terminal / atlas layout
// Stronger contrast, dense bento grid, novel "delta-bar" chart that emphasizes
// month-by-month co-movement rather than absolute values.
const terminalStyles = {
root: {
background: "var(--surface, #FFF5E6)",
color: "var(--text, #111827)",
fontFamily: "Inter, system-ui, sans-serif",
minHeight: "100%",
width: "100%",
boxSizing: "border-box",
},
};
function TerminalLayout({ correlations, themeColors }) {
// Read initial active id from URL hash (e.g. #whisky-weather), falling back to first.
const initialId = (() => {
const fromHash = typeof window !== "undefined" ? decodeURIComponent((window.location.hash || "").slice(1)) : "";
return correlations.find((c) => c.id === fromHash) ? fromHash : correlations[0].id;
})();
const [activeId, setActiveId] = React.useState(initialId);
const active = correlations.find((c) => c.id === activeId) || correlations[0];
const detailRef = React.useRef(null);
// Keep URL hash + document title + OG meta tags in sync with the active correlation.
React.useEffect(() => {
if (typeof window === "undefined") return;
// Hash (preserve scroll — replaceState avoids History entries piling up on every click)
const desiredHash = `#${active.id}`;
if (window.location.hash !== desiredHash) {
window.history.replaceState(null, "", `${window.location.pathname}${window.location.search}${desiredHash}`);
}
// Title
document.title = `${active.title} — Useful Correlations`;
// OG / Twitter / canonical meta — set or update
const setMeta = (selector, attr, value) => {
let el = document.head.querySelector(selector);
if (!el) {
el = document.createElement("meta");
const [, key, val] = selector.match(/\[(\w+)="([^"]+)"\]/) || [];
if (key && val) el.setAttribute(key, val);
document.head.appendChild(el);
}
el.setAttribute(attr, value);
};
const url = `${window.location.origin}${window.location.pathname}#${active.id}`;
const description = active.soWhat || active.why?.serious || active.title;
setMeta('meta[property="og:title"]', "content", active.title);
setMeta('meta[property="og:description"]', "content", description);
setMeta('meta[property="og:url"]', "content", url);
setMeta('meta[property="og:type"]', "content", "article");
setMeta('meta[property="og:site_name"]', "content", "Useful Correlations");
setMeta('meta[name="twitter:card"]', "content", "summary_large_image");
setMeta('meta[name="twitter:title"]', "content", active.title);
setMeta('meta[name="twitter:description"]', "content", description);
setMeta('meta[name="description"]', "content", description);
// Canonical
let canon = document.head.querySelector('link[rel="canonical"]');
if (!canon) {
canon = document.createElement("link");
canon.setAttribute("rel", "canonical");
document.head.appendChild(canon);
}
canon.setAttribute("href", url);
}, [active]);
// Listen for back/forward navigation that changes the hash.
React.useEffect(() => {
const onHash = () => {
const id = decodeURIComponent((window.location.hash || "").slice(1));
if (correlations.find((c) => c.id === id) && id !== activeId) setActiveId(id);
};
window.addEventListener("hashchange", onHash);
return () => window.removeEventListener("hashchange", onHash);
}, [activeId, correlations]);
const handleSelect = (id) => {
setActiveId(id);
// smooth-scroll the detail block into view so the animation is visible
requestAnimationFrame(() => {
const el = detailRef.current;
if (!el) return;
const y = el.getBoundingClientRect().top + window.scrollY - 24;
window.scrollTo({ top: y, behavior: "smooth" });
});
};
return (
);
}
function TerminalNav({ themeColors }) {
return (
);
}
function TerminalMaster({ correlations, activeId, onSelect, themeColors }) {
return (
The atlas of
useful{" "}
correlations
A curated, evolving exploration of how the world connects in unexpected ways.
);
}
function TerminalDetail({ correlation, themeColors }) {
const [highlightedAnnotation, setHighlightedAnnotation] = React.useState(null);
// Reset highlight when the correlation itself changes.
React.useEffect(() => {
setHighlightedAnnotation(null);
}, [correlation.id]);
return (
{/* Big hero card with delta chart */}
{/* R coefficient panel */}
{/* Why card */}
{/* So what card */}
{/* Annotations card */}
{/* Take it with you removed — share lives in the chart card header */}
);
}
function DeltaChartCard({ correlation, themeColors, highlightedAnnotation }) {
const { dataA, dataB } = correlation;
const n = dataA.length;
const w = 920;
const h = 360;
const pad = { l: 40, r: 40, t: 32, b: 40 };
// Live-fill animation: 0..1 progress, restarts whenever correlation.id changes.
const progress = useChartProgress(correlation.id, 1900);
const chartType = correlation.chartType || "delta-bar";
const cadenceLabel = chartType === "yearly-bars"
? `Annual · ${correlation.dataA.length} years · hrs per day`
: correlation.weekLabels
? `Co-movement · ${correlation.weekLabels.length} pts · normalized`
: "Co-movement · normalized deviation from mean";
return (
{cadenceLabel}
);
}
// -----------------------------------------------------------------------------
// Chart body: DUAL-LINE
// Two normalized series rendered as lines with soft area fills underneath.
// Best for parallel/co-rising stories (e.g. GLP-1 use × "food noise" lexicon).
// -----------------------------------------------------------------------------
function DualLineChartBody({ correlation, themeColors, progress, highlightedAnnotation, w, h, pad }) {
const { dataA, dataB, annotations } = correlation;
const normA = normalize(dataA);
const normB = normalize(dataB);
const n = dataA.length;
const innerW = w - pad.l - pad.r;
const innerH = h - pad.t - pad.b;
const cx = (i) => pad.l + (i / (n - 1)) * innerW;
const cy = (v) => pad.t + (1 - v) * innerH;
const baseY = pad.t + innerH;
const scanX = pad.l + progress * innerW;
const linePath = (norm) => norm.map((v, i) => `${i === 0 ? "M" : "L"}${cx(i).toFixed(2)},${cy(v).toFixed(2)}`).join(" ");
const areaPath = (norm) => `${linePath(norm)} L${cx(n - 1).toFixed(2)},${baseY} L${cx(0).toFixed(2)},${baseY} Z`;
const pathA = linePath(normA);
const pathB = linePath(normB);
const areaA = areaPath(normA);
const areaB = areaPath(normB);
const clipId = `chart-clip-${correlation.id}`;
const gradAId = `gradA-${correlation.id}`;
const gradBId = `gradB-${correlation.id}`;
const clipW = Math.max(0, progress * innerW);
return (
<>
{/* baseline */}
{/* clipped wave layer */}
{/* scan line — visible while drawing */}
{progress < 1 && progress > 0.01 && (
)}
);
}
// -----------------------------------------------------------------------------
// Chart body: DELTA-BAR
// Two-sided bars deviating from a center line. Best for inverse correlations
// where the bars naturally point opposite directions (e.g. temp × whisky).
// -----------------------------------------------------------------------------
function DeltaBarChartBody({ correlation, themeColors, progress, highlightedAnnotation, w, h, pad }) {
const { dataA, dataB, annotations } = correlation;
const normA = normalize(dataA);
const normB = normalize(dataB);
const n = dataA.length;
const innerW = w - pad.l - pad.r;
const innerH = h - pad.t - pad.b;
const cx = (i) => pad.l + (i / (n - 1)) * innerW;
const mid = pad.t + innerH / 2;
const halfH = innerH / 2;
const barW = (innerW / n) * 0.42;
const scanX = pad.l + progress * innerW;
return (
<>
{/* center line */}
{/* bars */}
{normA.map((v, i) => {
const dA = v - 0.5;
const dB = normB[i] - 0.5;
const yA = mid - dA * 2 * halfH;
const yB = mid - dB * 2 * halfH;
const x = cx(i);
const barFrac = i / (n - 1);
const fadeWindow = 1 / n;
const localT = Math.max(0, Math.min(1, (progress - barFrac) / fadeWindow));
if (localT <= 0) return null;
return (
);
})}
{/* scan line — visible while drawing */}
{progress < 1 && progress > 0.01 && (
)}
);
}
// -----------------------------------------------------------------------------
// Chart body: YEARLY-BARS
// Paired vertical bars per year, with explicit "no data" treatment for gaps
// (e.g. 2020 ATUS pause). Best for annual cadence stories where each year
// is a discrete event rather than a point on a continuous trend.
// -----------------------------------------------------------------------------
function YearlyBarsChartBody({ correlation, themeColors, progress, highlightedAnnotation, w, h, pad }) {
const { dataA, dataB, weekLabels, annotations } = correlation;
const n = dataA.length;
const innerW = w - pad.l - pad.r;
const innerH = h - pad.t - pad.b;
// Use the actual maxes (with a small headroom) — keeps absolute hours legible.
const validA = dataA.filter((v) => v != null);
const validB = dataB.filter((v) => v != null);
const maxVal = Math.max(...validA, ...validB) * 1.1;
const slotW = innerW / n;
const barW = Math.min(22, slotW * 0.32);
const gap = 4;
const cx = (i) => pad.l + slotW * (i + 0.5);
const baseY = pad.t + innerH;
const barH = (v) => (v / maxVal) * innerH;
const scanX = pad.l + progress * innerW;
return (
<>
{/* baseline */}
{/* horizontal gridlines (every 0.2 hrs ≈ 12 min) */}
{[0.2, 0.4, 0.6, 0.8].map((tick) => {
if (tick > maxVal) return null;
const y = baseY - (tick / maxVal) * innerH;
return (
{tick.toFixed(1)}h
);
})}
{/* paired bars per year */}
{dataA.map((vA, i) => {
const vB = dataB[i];
const x = cx(i);
// Stagger so each bar starts shortly after the previous, and the LAST
// bar's window finishes exactly at progress=1. Map i∈[0,n-1] → [0, 1-fadeWindow].
const fadeWindow = 0.22;
const barFrac = (i / Math.max(1, n - 1)) * (1 - fadeWindow);
const localT = Math.max(0, Math.min(1, (progress - barFrac) / fadeWindow));
if (localT <= 0) return null;
// 2020-style gap: render a dashed empty slot with a "no data" label
if (vA == null || vB == null) {
return (
NO DATA · COVID
);
}
const hA = barH(vA) * localT;
const hB = barH(vB) * localT;
return (
{/* Value labels on top of each bar — only once fully drawn */}
{localT > 0.85 && (
<>
{vA.toFixed(2)}
{vB.toFixed(2)}
)}
{/* Year label below */}
{weekLabels ? weekLabels[i] : i}
);
})}
{/* scan line — visible while drawing */}
{progress < 1 && progress > 0.01 && (
)}
);
}
// -----------------------------------------------------------------------------
// Shared overlay: annotations (vertical guide + circle + callout)
// -----------------------------------------------------------------------------
function ChartAnnotationsLayer({ annotations, progress, highlightedAnnotation, themeColors, n, cx, pad, h, w }) {
return (
<>
{annotations.map((a, i) => {
const annFrac = a.idx / (n - 1);
const visible = progress >= annFrac;
if (!visible) return null;
const fadeT = progress >= 1 ? 1 : Math.min(1, (progress - annFrac) * 6);
const isHighlighted = highlightedAnnotation === i;
return (
{isHighlighted && (
)}
{isHighlighted && (
)}
{isHighlighted && (
)}
);
})}
);
}
// -----------------------------------------------------------------------------
// Shared overlay: x-axis ticks (auto-stepped by series length)
// -----------------------------------------------------------------------------
function ChartXTicksLayer({ correlation, progress, themeColors, n, cx, pad, h }) {
const labels = correlation.weekLabels;
const step = labels && labels.length > 60 ? 12 : labels && labels.length > 30 ? 8 : 4;
return (
<>
{correlation.dataA.map((_, i) => {
if (i % step !== 0) return null;
const tickFrac = i / (n - 1);
if (progress < tickFrac) return null;
const fadeT = Math.min(1, (progress - tickFrac) * 6);
const lbl = labels ? labels[i] : monthLabel(i);
return (
{lbl}
);
})}
);
}
function Legend({ dotColor, label, themeColors }) {
return (
{label}
);
}
function RPanel({ correlation, themeColors }) {
const r = correlation.r;
const strength = Math.abs(r);
const label =
strength >= 0.9 ? "very strong" :
strength >= 0.7 ? "strong" :
strength >= 0.5 ? "substantial" :
strength >= 0.3 ? "moderate" :
"weak";
const sigDots = Math.min(5, Math.round(strength * 5));
// Number counts up in lockstep with the chart fill (same duration, no delay).
const numberProgress = useChartProgress(`r:${correlation.id}`, 1900);
const animatedR = r * numberProgress;
// Meter fills band-by-band in lockstep with the chart and number.
const meterProgress = useChartProgress(`meter:${correlation.id}`, 1900);
const filledBands = Math.floor(meterProgress * sigDots + 0.0001);
// Which band the moving notch is currently over (0..sigDots-1)
const notchIndex = meterProgress >= 1
? sigDots - 1
: Math.min(sigDots - 1, Math.floor(meterProgress * sigDots));
// Only show the active label after the meter settles, so words don't flash mid-fill
const showLabel = meterProgress >= 1;
return (
Pearson correlation
{animatedR > 0 ? "+" : animatedR < 0 ? "" : ""}
{animatedR.toFixed(2)}
{label}
strength meter
{[0, 1, 2, 3, 4].map((i) => (
{meterProgress > 0 && i === notchIndex && (
)}
))}
{["weak", "moderate", "substantial", "strong", "very strong"].map((bandLabel, i) => {
const isActive = i === sigDots - 1;
return (
{bandLabel}
);
})}
);
}
function WhyCard({ correlation, themeColors }) {
const text = typeof correlation.why === "string" ? correlation.why : (correlation.why.serious || correlation.why.playful || "");
return (
);
}
function SoWhatCard({ correlation, themeColors }) {
return (
For brands
{correlation.soWhat}
);
}
function AnnotationCallout({ label, themeColors, chartWidth, cxValue }) {
// Estimate width to keep the pill inside the chart area; flip anchor if near edges.
const charW = 6.2;
const padX = 10;
const textW = Math.min(label.length * charW, 220);
const pillW = textW + padX * 2;
// Default centered, but clamp so the pill stays inside the SVG viewBox.
let anchorX = -pillW / 2;
const leftEdge = cxValue + anchorX;
const rightEdge = leftEdge + pillW;
if (leftEdge < 8) anchorX = 8 - cxValue;
else if (rightEdge > chartWidth - 8) anchorX = (chartWidth - 8) - cxValue - pillW;
return (
{label.length > 36 ? label.slice(0, 35) + "…" : label}
);
}
function AnnotationsCard({ correlation, themeColors, highlightedAnnotation, onHighlight }) {
return (
Events
{correlation.annotations.map((a, i) => (
onHighlight(highlightedAnnotation === i ? null : i)}
themeColors={themeColors}
weekLabels={correlation.weekLabels}
/>
))}
);
}
function AnnotationRow({ annotation, isLast, isActive, onClick, themeColors, weekLabels }) {
const [hover, setHover] = React.useState(false);
const dateLabel = resolveDateLabel(weekLabels, annotation.idx);
return (
);
}
function ShareButton({ correlation, themeColors }) {
const [open, setOpen] = React.useState(false);
const [copied, setCopied] = React.useState(false);
const [hover, setHover] = React.useState(false);
const wrapperRef = React.useRef(null);
const permalink = (() => {
if (typeof window === "undefined") return `https://useful-correlations.com/#${correlation.id}`;
return `${window.location.origin}${window.location.pathname}#${correlation.id}`;
})();
const shareText = `${correlation.title} — useful-correlations.com`;
// Close popover on outside click or Escape.
React.useEffect(() => {
if (!open) return;
const onDoc = (e) => {
if (wrapperRef.current && !wrapperRef.current.contains(e.target)) setOpen(false);
};
const onKey = (e) => { if (e.key === "Escape") setOpen(false); };
document.addEventListener("mousedown", onDoc);
document.addEventListener("keydown", onKey);
return () => {
document.removeEventListener("mousedown", onDoc);
document.removeEventListener("keydown", onKey);
};
}, [open]);
// Hover-open with a small close delay so moving from button → popover doesn't flicker it shut.
const closeTimer = React.useRef(null);
const cancelClose = () => {
if (closeTimer.current) {
clearTimeout(closeTimer.current);
closeTimer.current = null;
}
};
const scheduleClose = () => {
cancelClose();
closeTimer.current = setTimeout(() => setOpen(false), 120);
};
React.useEffect(() => () => cancelClose(), []);
const handleClick = () => {
// Click still toggles — useful for touch / keyboard users.
setOpen((v) => !v);
};
const handleCopy = async () => {
try {
if (navigator.clipboard) await navigator.clipboard.writeText(permalink);
} catch (e) {
// ignore
}
setCopied(true);
setTimeout(() => setCopied(false), 1600);
};
const linkedInUrl = `https://www.linkedin.com/sharing/share-offsite/?url=${encodeURIComponent(permalink)}`;
const mailtoUrl = `mailto:?subject=${encodeURIComponent(`Useful correlation: ${correlation.title}`)}&body=${encodeURIComponent(`${shareText}\n\n${permalink}`)}`;
return (
{ cancelClose(); setOpen(true); }}
onMouseLeave={scheduleClose}
style={{ position: "relative", flexShrink: 0 }}
>
{open && (
setOpen(false)}
/>
)}
);
}
function SharePopover({ themeColors, linkedInUrl, mailtoUrl, permalink, copied, onCopy, onClose }) {
return (
}
label="Share on LinkedIn"
/>
: }
label={copied ? "Link copied" : "Copy link"}
meta={copied ? "✓" : null}
emphasis={copied}
/>
);
}
function ShareOption({ themeColors, href, external, onClick, icon, label, meta, emphasis }) {
const [hover, setHover] = React.useState(false);
const baseStyle = {
display: "flex",
alignItems: "center",
gap: 12,
padding: "10px 12px",
borderRadius: 10,
background: hover ? themeColors.text + "08" : "transparent",
transition: "background 120ms ease",
cursor: "pointer",
color: themeColors.text,
textDecoration: "none",
fontFamily: "Inter, system-ui, sans-serif",
};
const inner = (
<>
{icon}
{label}
{meta && (
{meta}
)}
);
const handlers = {
onMouseEnter: () => setHover(true),
onMouseLeave: () => setHover(false),
};
if (href) {
return (
{inner}
);
}
return (
);
}
function LinkedInGlyph() {
return (
);
}
function EmailGlyph() {
return (
);
}
function LinkGlyph() {
return (
);
}
function CheckGlyph({ color }) {
return (
);
}
function ShareGlyph({ color }) {
return (
);
}
function TerminalGallery({ id, correlations, activeId, onSelect, themeColors }) {
const all = correlations.filter((c) => c.id !== activeId);
const scrollerRef = React.useRef(null);
const scrollBy = (dir) => {
const el = scrollerRef.current;
if (!el) return;
el.scrollBy({ left: dir * (el.clientWidth * 0.8), behavior: "smooth" });
};
return (
the atlas is always growing
More surprising correlations
scrollBy(-1)} themeColors={themeColors} label="‹" />
scrollBy(1)} themeColors={themeColors} label="›" />
);
}
function CarouselBtn({ onClick, themeColors, label }) {
return (
);
}
function GalleryCard({ correlation, themeColors, onSelect, active }) {
const { r } = correlation;
const dir = r > 0 ? "+" : "−";
return (
);
}
function MiniSpark({ seriesA, seriesB, themeColors }) {
const w = 280;
const h = 64;
const a = normalize(seriesA);
const b = normalize(seriesB);
const n = a.length;
const xAt = (i) => (i / (n - 1)) * w;
const pathA = a.map((v, i) => `${i === 0 ? "M" : "L"} ${xAt(i)} ${h - v * h}`).join(" ");
const pathB = b.map((v, i) => `${i === 0 ? "M" : "L"} ${xAt(i)} ${h - v * h}`).join(" ");
return (
);
}
function TerminalSubmit({ id, themeColors }) {
const [copied, setCopied] = React.useState(false);
const email = "hello@useful-correlations.com";
const handleCopy = async () => {
try {
await navigator.clipboard.writeText(email);
} catch (e) {
// Fallback for older browsers / non-HTTPS contexts
const ta = document.createElement("textarea");
ta.value = email;
ta.style.position = "fixed";
ta.style.opacity = "0";
document.body.appendChild(ta);
ta.select();
try { document.execCommand("copy"); } catch (_) {}
document.body.removeChild(ta);
}
setCopied(true);
setTimeout(() => setCopied(false), 2000);
};
return (
Submit your own
Spotted a useful correlation?
Send us two datasets as .csv files and we’ll plot them for you.
);
}
// Helpers
function pulseTarget(el) {
if (!el) return;
// brief outline pulse so the destination is unmistakable on arrival
const prev = {
boxShadow: el.style.boxShadow,
transition: el.style.transition,
};
// wait for the smooth scroll to be roughly underway before firing the pulse
setTimeout(() => {
el.style.transition = "box-shadow 280ms ease-out";
el.style.boxShadow = "inset 0 0 0 3px rgba(122, 196, 138, 0.85)";
setTimeout(() => {
el.style.boxShadow = "inset 0 0 0 0 rgba(122, 196, 138, 0)";
setTimeout(() => {
el.style.boxShadow = prev.boxShadow;
el.style.transition = prev.transition;
}, 320);
}, 480);
}, 350);
}
function useChartProgress(key, duration = 1100, delay = 0) {
const [p, setP] = React.useState(0);
React.useEffect(() => {
if (typeof window !== "undefined" &&
window.matchMedia &&
window.matchMedia("(prefers-reduced-motion: reduce)").matches) {
setP(1);
return;
}
let raf;
let timeoutId;
setP(0);
timeoutId = setTimeout(() => {
const start = performance.now();
const tick = (now) => {
const t = Math.min(1, (now - start) / duration);
// ease-out cubic
const eased = 1 - Math.pow(1 - t, 3);
setP(eased);
if (t < 1) raf = requestAnimationFrame(tick);
};
raf = requestAnimationFrame(tick);
}, delay);
return () => {
clearTimeout(timeoutId);
if (raf) cancelAnimationFrame(raf);
};
}, [key, duration, delay]);
return p;
}
function normalize(arr) {
const valid = arr.filter((v) => v != null && Number.isFinite(v));
const min = Math.min(...valid);
const max = Math.max(...valid);
return arr.map((v) => (v == null || !Number.isFinite(v) ? null : (v - min) / (max - min || 1)));
}
function monthLabel(i) {
const months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
return `${months[i % 12]} '${i < 12 ? "24" : "25"}`;
}
// Resolve an annotation/event date label that ALWAYS includes the year.
// weekLabels typically only stamps the year on the first entry of each year
// (e.g. "Jan '25", "Feb", "Mar", ...). When an annotation lands on a bare
// month, we walk backwards to the nearest year-bearing label and stitch the
// short year onto the current month, yielding e.g. "Jun '25".
function resolveDateLabel(weekLabels, idx) {
if (!weekLabels || weekLabels[idx] == null) return monthLabel(idx);
const raw = String(weekLabels[idx]);
const yearMatch = raw.match(/'(\d{2})/);
if (yearMatch) return raw; // already has a year
// Walk back to find the most recent label that carries a year.
for (let j = idx - 1; j >= 0; j--) {
const prev = String(weekLabels[j] || "");
const m = prev.match(/'(\d{2})/);
if (m) return `${raw} '${m[1]}`;
}
return raw;
}
window.TerminalLayout = TerminalLayout;