# Circuit
> Right-angle circuit traces between the cards you already have, with signals that travel through them. Mark any element with `data-circuit`, describe the graph in one string, and the traces route themselves: edge to edge side by side, top to bottom when the layout stacks, around anything in the way.
An animated React component from KeyframeUI, installed as source with the shadcn CLI. Built with React and Tailwind CSS.
- Docs and live preview: https://keyframeui.com/components/circuit
- Tags: Diagram, SVG, Interaction, Landing
- npm dependencies: clsx, tailwind-merge
## Installation
Register the @keyframeui registry in `components.json` once per project:
```json
{
"registries": {
"@keyframeui": "https://keyframeui.com/r/{name}.json"
}
}
```
Then add the component. It lands in `components/ui/circuit.tsx`, and the CLI also adds `lib/utils.ts` (the `cn` helper) and installs the npm dependencies:
```bash
npx shadcn@latest add @keyframeui/circuit
```
Or install by URL, without registering the namespace:
```bash
npx shadcn@latest add https://keyframeui.com/r/circuit.json
```
## Usage
The main demo shows typical usage.
### Agent Orchestrator
Issues, threads and tickets go into an orchestrator, which hands each one to the next free agent with `fanout="one"`. Every card is a plain `div` with `data-circuit`; they light up on `data-circuit-pulse` and the counters tick through `onArrive`. Hover a card to see the path through it. Narrow the frame and the columns become rows: the traces turn to run top to bottom by themselves.
Install this demo, with the component included:
```bash
npx shadcn@latest add @keyframeui/circuit-demo
```
```tsx title="components/circuit-demo.tsx"
"use client";
import * as React from "react";
import { Circuit } from "@/components/ui/circuit";
const SOURCES = [
{ id: "github", name: "GitHub", meta: "issue #482", icon: "M8 3.5a4.5 4.5 0 1 0 0 9 4.5 4.5 0 0 0 0-9Zm0 3a1.5 1.5 0 1 1 0 3 1.5 1.5 0 0 1 0-3Z" },
{ id: "slack", name: "Slack", meta: "#support", icon: "M3 4.5A1.5 1.5 0 0 1 4.5 3h7A1.5 1.5 0 0 1 13 4.5v5a1.5 1.5 0 0 1-1.5 1.5H7l-3 2.5V11h.5A1.5 1.5 0 0 1 3 9.5Z" },
{ id: "linear", name: "Linear", meta: "ENG-219", icon: "M3 5.5 5.5 3h7.5v7.5L10.5 13H3Zm3 1.5h4M6 9h2.5" },
];
const AGENTS = [
{ id: "coder", name: "Coder", verb: "patched" },
{ id: "reviewer", name: "Reviewer", verb: "reviewed" },
{ id: "tester", name: "Tester", verb: "verified" },
];
// What every card shares: dims when another card is hovered, lights when a signal lands.
const card =
"rounded-xl border border-zinc-200 bg-white shadow-xs transition-[opacity,border-color,box-shadow] duration-300 dark:border-zinc-800 dark:bg-zinc-900 data-[circuit-state=dimmed]:opacity-45 data-[circuit-state=active]:border-zinc-400 dark:data-[circuit-state=active]:border-zinc-600 data-circuit-pulse:border-sky-400 data-circuit-pulse:shadow-[0_0_0_4px_rgb(14_165_233/0.14)] dark:data-circuit-pulse:border-sky-500";
function Icon({ d }: { d: string }) {
return (
);
}
export function CircuitDemo() {
const [done, setDone] = React.useState>({ coder: 14, reviewer: 9, tester: 11 });
const [routed, setRouted] = React.useState(128);
return (
);
}
```
## Props
| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `flow` (required) | `string \| (string \| CircuitTrace)[]` | | Which nodes connect, by their `data-circuit` ids. `"a, b -> c -> d, e"` connects every node in a stage to every node in the next; separate chains with `;` or a new line. Mix in `{ from, to, color?, fromSide?, toSide? }` objects for a trace's own packet color or pinned sides. |
| `autoPlay` | `boolean` | `true` | Sources (nodes nothing flows into) send signals on their own. Off, signals only start on hover, focus, tap or `apiRef.send()`. |
| `interval` | `number` | `2.4` | Seconds between signals from each source, with a little jitter. |
| `speed` | `number` | `260` | Packet speed in px per second, so short and long traces move alike. |
| `fanout` | `"all" \| "one"` | `"all"` | When a signal reaches a node with several outgoing traces, send it down all of them, or down one at a time in turn (a router handing work to the next agent). |
| `highlight` | `"path" \| "neighbors" \| "none"` | `"path"` | What lights up when a node is hovered, focused or tapped: everything upstream and downstream of it, only its own traces, or nothing. |
| `onArrive` | `(node: string, from: string) => void` | | Called when a signal lands on a node. Use it to tick a counter or log the event in the card. |
| `apiRef` | `React.Ref<{ send(node: string): void }>` | | `send(node)` fires a signal out of a node from code: a button, a websocket message, a form submit. |
| `radius` | `number` | `12` | Corner radius of the bends, in px. Tight corners shrink to fit. |
| `pinSpacing` | `number` | `12` | Space between traces sharing a card edge, and between traces that would otherwise run on top of each other, in px. |
| `pins` | `boolean` | `true` | Draw a pin where a trace meets a card. It flashes in the packet color when a signal lands. |
| `traceClassName` | `string` | `"text-zinc-300 dark:text-zinc-700"` | `text-*` classes for the traces and pins. |
| `packetClassName` | `string` | `"text-sky-500 dark:text-sky-400"` | `text-*` classes for the packets and the lit path. A trace's own `color` wins. |
| `className` | `string` | | Your layout: the circuit is a plain `div` and its children stay its direct children, so put your grid or flex classes here. Nodes are any descendants with `data-circuit="id"`; they get `data-circuit-state` (`active`, `linked` or `dimmed`) while a node is highlighted and `data-circuit-pulse` for half a second when a signal lands, for you to style with `data-*` variants. Give cards a background: traces run underneath them. |
## Source
```tsx title="components/ui/circuit.tsx"
"use client";
import * as React from "react";
import { cn } from "@/lib/utils";
/* ─────────────────────────────────────────────────────────
* CIRCUIT STORYBOARD
*
* nodes any element inside with data-circuit="id".
* No wrappers, no refs: your grid or flex layout stays
* exactly as it is
* flow one string draws the graph:
* "github, slack -> agent -> pr, docs"
* measure every frame while it's on screen, the node boxes are
* read relative to the circuit, so lines follow resizes,
* font swaps, hover lifts and layout animations
* route each trace tries a few right-angle shapes (Z, L, or a
* U around the side) and keeps the one that crosses no
* other card with the fewest bends. Side-by-side cards
* connect edge to edge; stacked on a phone they connect
* top to bottom or detour down a gutter
* pins traces sharing a card edge spread into separate pins,
* sorted so they never cross; traces sharing a channel
* spread apart only where they would overlap
* draw on mount the traces draw themselves in, stage by stage
* signal a packet leaves each source, eases along its trace and
* lands: the card gets data-circuit-pulse, the pin
* flashes, onArrive fires, and the card passes it on
* hover pointing at (or focusing, or tapping) a card lights
* the path through it, dims the rest and sends a signal
* ───────────────────────────────────────────────────────── */
type Side = "top" | "right" | "bottom" | "left";
export type CircuitTrace = {
from: string;
to: string;
/** Packet color for this trace (any CSS color). */
color?: string;
/** Pin the side the trace leaves `from` by. Picked automatically otherwise. */
fromSide?: Side;
/** Pin the side the trace enters `to` by. Picked automatically otherwise. */
toSide?: Side;
};
/**
* `"a, b -> c -> d, e"`: every node in a stage connects to every node in
* the next. Separate chains with `;` or a new line. Mix in trace objects
* for per-trace options.
*/
export type CircuitFlow = string | ReadonlyArray;
export type CircuitControls = {
/** Send a signal out of a node, as if one had just arrived there. */
send: (node: string) => void;
};
export interface CircuitProps extends React.HTMLAttributes {
/** Which nodes connect. */
flow: CircuitFlow;
/** Sources (nodes nothing flows into) send signals on their own. */
autoPlay?: boolean;
/** Seconds between signals from each source. */
interval?: number;
/** Packet speed in px per second. */
speed?: number;
/** A node with several outgoing traces sends a signal down all of them, or down one at a time in turn. */
fanout?: "all" | "one";
/** What lights up when a node is hovered, focused or tapped. */
highlight?: "path" | "neighbors" | "none";
/** Corner radius of the bends, in px. */
radius?: number;
/** Space between pins sharing a card edge, and between traces sharing a channel, in px. */
pinSpacing?: number;
/** Draw a pin where a trace meets a card. */
pins?: boolean;
/** Called when a signal lands on a node. */
onArrive?: (node: string, from: string) => void;
/** `send(node)` fires a signal from code, e.g. a button or a real event. */
apiRef?: React.Ref;
/** Text color classes for the traces and pins. */
traceClassName?: string;
/** Text color classes for the packets and lit traces. */
packetClassName?: string;
}
export function Circuit({
flow,
autoPlay = true,
interval = 2.4,
speed = 260,
fanout = "all",
highlight = "path",
radius = 12,
pinSpacing = 12,
pins = true,
onArrive,
apiRef,
traceClassName,
packetClassName,
className,
children,
...props
}: CircuitProps) {
const rootRef = React.useRef(null);
const svgRef = React.useRef(null);
const engineRef = React.useRef(null);
const onArriveRef = React.useRef(onArrive);
React.useEffect(() => {
onArriveRef.current = onArrive;
}, [onArrive]);
React.useEffect(() => {
const root = rootRef.current;
const svg = svgRef.current;
if (!root || !svg) return;
const engine = createEngine(root, svg, (node, from) => onArriveRef.current?.(node, from));
engineRef.current = engine;
return () => {
engine.destroy();
engineRef.current = null;
};
}, []);
const trace = cn("text-zinc-300 dark:text-zinc-700", traceClassName);
const packet = cn("text-sky-500 dark:text-sky-400", packetClassName);
React.useEffect(() => {
engineRef.current?.configure({
flow,
autoPlay,
interval,
speed,
fanout,
highlight,
radius,
pinSpacing,
pins,
trace,
packet,
});
}, [flow, autoPlay, interval, speed, fanout, highlight, radius, pinSpacing, pins, trace, packet]);
React.useImperativeHandle(
apiRef,
() => ({ send: (node: string) => engineRef.current?.send(node) }),
[],
);
return (
{/* Under every card: in a stacking context of its own, a negative z-index paints
above the circuit's background but below its in-flow content. m-0 and border-0
keep space-* and divide-* on the circuit from reaching it. */}
{children}
);
}
/* ─────────────────────────────────────────────────────────
* FLOW
* ───────────────────────────────────────────────────────── */
function parseFlow(flow: CircuitFlow): CircuitTrace[] {
const traces = new Map();
for (const item of typeof flow === "string" ? [flow] : flow) {
if (typeof item !== "string") {
const key = `${item.from}\n${item.to}`;
traces.set(key, { ...traces.get(key), ...item });
continue;
}
for (const chain of item.split(/[\n;]/)) {
const stages = chain
.split("->")
.map((stage) => stage.split(",").map((id) => id.trim()).filter(Boolean));
for (let i = 0; i < stages.length - 1; i++) {
for (const from of stages[i]) {
for (const to of stages[i + 1]) {
const key = `${from}\n${to}`;
if (from !== to && !traces.has(key)) traces.set(key, { from, to });
}
}
}
}
}
return [...traces.values()];
}
/* ─────────────────────────────────────────────────────────
* GEOMETRY
* ───────────────────────────────────────────────────────── */
type Pt = { x: number; y: number };
type Box = { l: number; t: number; r: number; b: number };
/** Shortest straight run out of a card before a trace may bend. */
const STUB = 12;
/** How far a detour stays clear of the cards it goes around. */
const GUTTER = 18;
const isHorizontal = (side: Side) => side === "left" || side === "right";
const OPPOSITE: Record = { top: "bottom", bottom: "top", left: "right", right: "left" };
function anchor(box: Box, side: Side, offset: number): Pt {
const cx = (box.l + box.r) / 2;
const cy = (box.t + box.b) / 2;
if (side === "top") return { x: cx + offset, y: box.t };
if (side === "bottom") return { x: cx + offset, y: box.b };
if (side === "left") return { x: box.l, y: cy + offset };
return { x: box.r, y: cy + offset };
}
/** Half the usable length of a card edge, so pins stay clear of its corners. */
function sideReach(box: Box, side: Side) {
const length = isHorizontal(side) ? box.b - box.t : box.r - box.l;
return Math.max(0, length / 2 - Math.min(10, length / 4));
}
type Kind = "channel" | "detour" | "elbow" | "free";
/**
* Right-angle waypoints. A channel route (Z between facing edges, or a
* detour U around the side) runs its middle leg at `channel`; an elbow
* bends once; a free route stubs out of both edges and meets in between.
*/
function waypoints(kind: Kind, from: Side, to: Side, start: Pt, end: Pt, channel: number): Pt[] {
if (kind === "channel" || kind === "detour") {
return isHorizontal(from)
? [start, { x: channel, y: start.y }, { x: channel, y: end.y }, end]
: [start, { x: start.x, y: channel }, { x: end.x, y: channel }, end];
}
if (kind === "elbow") {
return isHorizontal(from) ? [start, { x: end.x, y: start.y }, end] : [start, { x: start.x, y: end.y }, end];
}
const out = step(start, from, STUB);
const into = step(end, to, STUB);
const middle = isHorizontal(from) ? { x: out.x, y: into.y } : { x: into.x, y: out.y };
return [start, out, middle, into, end];
}
function step(point: Pt, side: Side, distance: number): Pt {
if (side === "top") return { x: point.x, y: point.y - distance };
if (side === "bottom") return { x: point.x, y: point.y + distance };
if (side === "left") return { x: point.x - distance, y: point.y };
return { x: point.x + distance, y: point.y };
}
/** Drop repeated and collinear points. */
function simplify(points: Pt[]): Pt[] {
const out: Pt[] = [];
for (const p of points) {
const last = out[out.length - 1];
if (last && Math.abs(last.x - p.x) < 0.5 && Math.abs(last.y - p.y) < 0.5) continue;
if (out.length >= 2) {
const a = out[out.length - 2];
if ((Math.abs(a.x - last.x) < 0.5 && Math.abs(last.x - p.x) < 0.5) || (Math.abs(a.y - last.y) < 0.5 && Math.abs(last.y - p.y) < 0.5)) {
out[out.length - 1] = p;
continue;
}
}
out.push(p);
}
return out;
}
/** Does an axis-aligned segment pass through the inside of a box? */
function hits(a: Pt, b: Pt, box: Box) {
return Math.max(a.x, b.x) > box.l && Math.min(a.x, b.x) < box.r && Math.max(a.y, b.y) > box.t && Math.min(a.y, b.y) < box.b;
}
/** Crossings (1 each) and overlapping runs (2 each) between two right-angle polylines. */
function tangles(p: Pt[], q: Pt[]) {
let count = 0;
for (let i = 0; i < p.length - 1; i++) {
for (let j = 0; j < q.length - 1; j++) {
const [a, b, c, d] = [p[i], p[i + 1], q[j], q[j + 1]];
const pv = Math.abs(a.x - b.x) < 0.5;
const qv = Math.abs(c.x - d.x) < 0.5;
if (pv === qv) {
const same = pv ? Math.abs(a.x - c.x) < 0.5 : Math.abs(a.y - c.y) < 0.5;
const lo = pv ? Math.max(Math.min(a.y, b.y), Math.min(c.y, d.y)) : Math.max(Math.min(a.x, b.x), Math.min(c.x, d.x));
const hi = pv ? Math.min(Math.max(a.y, b.y), Math.max(c.y, d.y)) : Math.min(Math.max(a.x, b.x), Math.max(c.x, d.x));
if (same && hi - lo > 1) count += 2;
} else {
const [v1, v2, h1, h2] = pv ? [a, b, c, d] : [c, d, a, b];
const x = v1.x;
const y = h1.y;
if (x > Math.min(h1.x, h2.x) + 0.5 && x < Math.max(h1.x, h2.x) - 0.5 && y > Math.min(v1.y, v2.y) + 0.5 && y < Math.max(v1.y, v2.y) - 0.5) {
count += 1;
}
}
}
}
return count;
}
type Segment =
| { line: true; a: Pt; b: Pt; length: number }
| { line: false; c: Pt; r: number; a0: number; turn: number; length: number };
type Shape = { d: string; segments: Segment[]; length: number; start: Pt; end: Pt };
/** Rounded corners as true quarter arcs, so the length (and every packet position) is exact. */
function shape(points: Pt[], radius: number): Shape {
const segments: Segment[] = [];
const last = points.length - 1;
let d = `M${points[0].x} ${points[0].y}`;
let cursor = points[0];
for (let i = 1; i < last; i++) {
const [prev, at, next] = [points[i - 1], points[i], points[i + 1]];
const inLength = Math.hypot(at.x - prev.x, at.y - prev.y);
const outLength = Math.hypot(next.x - at.x, next.y - at.y);
const u = { x: (at.x - prev.x) / inLength, y: (at.y - prev.y) / inLength };
const v = { x: (next.x - at.x) / outLength, y: (next.y - at.y) / outLength };
const r = Math.min(radius, i === 1 ? inLength : inLength / 2, i + 1 === last ? outLength : outLength / 2);
const enter = { x: at.x - u.x * r, y: at.y - u.y * r };
const exit = { x: at.x + v.x * r, y: at.y + v.y * r };
const line = Math.hypot(enter.x - cursor.x, enter.y - cursor.y);
if (line > 0.01) segments.push({ line: true, a: cursor, b: enter, length: line });
d += ` L${enter.x} ${enter.y}`;
if (r > 0.5) {
const cross = u.x * v.y - u.y * v.x;
const c = { x: enter.x + v.x * r, y: enter.y + v.y * r };
segments.push({
line: false,
c,
r,
a0: Math.atan2(enter.y - c.y, enter.x - c.x),
turn: cross > 0 ? Math.PI / 2 : -Math.PI / 2,
length: (Math.PI / 2) * r,
});
d += ` A${r} ${r} 0 0 ${cross > 0 ? 1 : 0} ${exit.x} ${exit.y}`;
} else {
d += ` L${exit.x} ${exit.y}`;
}
cursor = exit;
}
const end = points[last];
const tail = Math.hypot(end.x - cursor.x, end.y - cursor.y);
if (tail > 0.01) segments.push({ line: true, a: cursor, b: end, length: tail });
d += ` L${end.x} ${end.y}`;
const length = segments.reduce((sum, s) => sum + s.length, 0);
return { d, segments, length, start: points[0], end };
}
function pointAt(shape: Shape, distance: number): Pt {
let left = Math.max(0, Math.min(distance, shape.length));
for (const s of shape.segments) {
if (left <= s.length) {
const k = s.length ? left / s.length : 0;
if (s.line) return { x: s.a.x + (s.b.x - s.a.x) * k, y: s.a.y + (s.b.y - s.a.y) * k };
const angle = s.a0 + s.turn * k;
return { x: s.c.x + Math.cos(angle) * s.r, y: s.c.y + Math.sin(angle) * s.r };
}
left -= s.length;
}
return shape.end;
}
/* ─────────────────────────────────────────────────────────
* ROUTER
* ───────────────────────────────────────────────────────── */
type Plan = {
index: number;
a: Box;
b: Box;
from: Side;
to: Side;
kind: Kind;
channel: number;
/** Where the middle leg may sit: between the cards for a Z, outward from `lo` for a detour. */
lo: number;
hi: number;
outward: 1 | -1;
fromOffset: number;
toOffset: number;
points: Pt[];
};
function build(plan: Plan) {
const start = anchor(plan.a, plan.from, plan.fromOffset);
const end = anchor(plan.b, plan.to, plan.toOffset);
plan.points = waypoints(plan.kind, plan.from, plan.to, start, end, plan.channel);
}
type Candidate = Omit & {
/** Taste: how much less we like this shape than a Z along the main axis. */
penalty: number;
};
function candidates(trace: CircuitTrace, a: Box, b: Box, obstacles: Box[]): Candidate[] {
const out: Candidate[] = [];
const gapX = Math.max(b.l - a.r, a.l - b.r);
const gapY = Math.max(b.t - a.b, a.t - b.b);
const rightward = b.l - a.r >= a.l - b.r;
const downward = b.t - a.b >= a.t - b.b;
// The main axis, with a lean toward horizontal: gaps that are nearly equal shouldn't
// flip a trace's direction (and leave a grid lopsided) over a few px.
const across = gapX >= gapY * 0.8;
// Z between facing edges: the tidy default when the cards sit side by side or one above the other.
if (gapX >= 2 * STUB) {
const [lo, hi] = rightward ? [a.r + STUB, b.l - STUB] : [b.r + STUB, a.l - STUB];
out.push({ a, b, from: rightward ? "right" : "left", to: rightward ? "left" : "right", kind: "channel", channel: (lo + hi) / 2, lo, hi, outward: 1, penalty: across ? 0 : 60 });
}
if (gapY >= 2 * STUB) {
const [lo, hi] = downward ? [a.b + STUB, b.t - STUB] : [b.b + STUB, a.t - STUB];
out.push({ a, b, from: downward ? "bottom" : "top", to: downward ? "top" : "bottom", kind: "channel", channel: (lo + hi) / 2, lo, hi, outward: 1, penalty: across ? 60 : 0 });
}
// Elbows: one bend, for cards that sit diagonally.
const bx = (b.l + b.r) / 2;
const by = (b.t + b.b) / 2;
const ax = (a.l + a.r) / 2;
const ay = (a.t + a.b) / 2;
const hFrom: Side = bx >= ax ? "right" : "left";
const hTo: Side = ay <= b.t ? "top" : "bottom";
if ((hFrom === "right" ? bx >= a.r + STUB : bx <= a.l - STUB) && (hTo === "top" ? ay <= b.t - STUB : ay >= b.b + STUB)) {
out.push({ a, b, from: hFrom, to: hTo, kind: "elbow", channel: 0, lo: 0, hi: 0, outward: 1, penalty: 80 });
}
const vFrom: Side = by >= ay ? "bottom" : "top";
const vTo: Side = ax <= b.l ? "left" : "right";
if ((vFrom === "bottom" ? by >= a.b + STUB : by <= a.t - STUB) && (vTo === "left" ? ax <= b.l - STUB : ax >= b.r + STUB)) {
out.push({ a, b, from: vFrom, to: vTo, kind: "elbow", channel: 0, lo: 0, hi: 0, outward: 1, penalty: 80 });
}
// Detours: out one side, along a gutter past everything in the way, back in the same side.
for (const side of ["right", "left", "bottom", "top"] as Side[]) {
const horizontal = isHorizontal(side);
const outward = side === "right" || side === "bottom" ? 1 : -1;
const span = horizontal ? [Math.min(ay, by), Math.max(ay, by)] : [Math.min(ax, bx), Math.max(ax, bx)];
let edge = outward > 0 ? -Infinity : Infinity;
for (const box of [a, b, ...obstacles]) {
const inSpan = horizontal ? box.b > span[0] && box.t < span[1] : box.r > span[0] && box.l < span[1];
if (box !== a && box !== b && !inSpan) continue;
const far = side === "right" ? box.r : side === "left" ? box.l : side === "bottom" ? box.b : box.t;
edge = outward > 0 ? Math.max(edge, far) : Math.min(edge, far);
}
const channel = edge + outward * GUTTER;
out.push({ a, b, from: side, to: side, kind: "detour", channel, lo: channel, hi: channel, outward, penalty: 200 });
}
const fits = out.filter((c) => (!trace.fromSide || c.from === trace.fromSide) && (!trace.toSide || c.to === trace.toSide));
if (fits.length) return fits;
// Sides pinned to something none of the shapes above can do: stub out of both and meet in the middle.
const from = trace.fromSide ?? (across ? (rightward ? "right" : "left") : downward ? "bottom" : "top");
const to = trace.toSide ?? OPPOSITE[from];
return [{ a, b, from, to, kind: "free", channel: 0, lo: 0, hi: 0, outward: 1, penalty: 0 }];
}
function route(traces: CircuitTrace[], boxes: Map, width: number, height: number, pinSpacing: number): (Pt[] | null)[] {
const plans: (Plan | null)[] = traces.map((trace, index) => {
const a = boxes.get(trace.from);
const b = boxes.get(trace.to);
if (!a || !b) return null;
const obstacles = [...boxes.values()].filter((box) => box !== a && box !== b);
let best: Plan | null = null;
let bestCost = Infinity;
for (const candidate of candidates(trace, a, b, obstacles)) {
const { penalty, ...rest } = candidate;
const plan: Plan = { ...rest, index, fromOffset: 0, toOffset: 0, points: [] };
build(plan);
const cost = score(plan, obstacles, width, height) + penalty;
if (cost < bestCost) {
best = plan;
bestCost = cost;
}
}
return best;
});
const live = plans.filter((p): p is Plan => p !== null);
// Pins: traces sharing a card edge spread along it, ordered by where their other end is.
const groups = new Map();
for (const plan of live) {
const ends: ["from" | "to", Side, Box, Side][] = [
["from", plan.from, plan.b, plan.to],
["to", plan.to, plan.a, plan.from],
];
for (const [end, side, other, otherSide] of ends) {
const key = `${end === "from" ? traces[plan.index].from : traces[plan.index].to}:${side}`;
const there = anchor(other, otherSide, 0);
const order = isHorizontal(side) ? there.y : there.x;
const list = groups.get(key) ?? [];
list.push({ plan, end, order: order + plan.index * 1e-3 });
groups.set(key, list);
}
}
const single = new Set();
for (const list of groups.values()) {
list.sort((p, q) => p.order - q.order);
const { plan, end } = list[0];
const box = end === "from" ? plan.a : plan.b;
const side = end === "from" ? plan.from : plan.to;
const reach = sideReach(box, side);
const gap = list.length > 1 ? Math.min(pinSpacing, (2 * reach) / (list.length - 1)) : 0;
list.forEach((entry, i) => {
const offset = (i - (list.length - 1) / 2) * gap;
if (entry.end === "from") entry.plan.fromOffset = offset;
else entry.plan.toOffset = offset;
});
if (list.length === 1) single.add(`${plan.index}:${end}`);
}
// A Z that would only jog a few px is pulled straight by sliding a lone pin.
for (const plan of live) {
if (plan.kind !== "channel") continue;
build(plan);
const [start, end] = [plan.points[0], plan.points[plan.points.length - 1]];
const drift = isHorizontal(plan.from) ? end.y - start.y : end.x - start.x;
if (Math.abs(drift) < 0.5 || Math.abs(drift) > 10) continue;
if (single.has(`${plan.index}:from`) && Math.abs(plan.fromOffset + drift) <= sideReach(plan.a, plan.from)) plan.fromOffset += drift;
else if (single.has(`${plan.index}:to`) && Math.abs(plan.toOffset - drift) <= sideReach(plan.b, plan.to)) plan.toOffset -= drift;
}
for (const plan of live) build(plan);
// Channels: middle legs that would run on top of each other spread apart.
const channels = live.filter((p) => p.kind === "channel" || p.kind === "detour");
const span = (p: Plan) => {
const [s, e] = [p.points[0], p.points[p.points.length - 1]];
return isHorizontal(p.from) ? [Math.min(s.y, e.y), Math.max(s.y, e.y)] : [Math.min(s.x, e.x), Math.max(s.x, e.x)];
};
const parent = channels.map((_, i) => i);
const find = (i: number): number => (parent[i] === i ? i : (parent[i] = find(parent[i])));
for (let i = 0; i < channels.length; i++) {
for (let j = i + 1; j < channels.length; j++) {
const [p, q] = [channels[i], channels[j]];
if (isHorizontal(p.from) !== isHorizontal(q.from) || Math.abs(p.channel - q.channel) >= pinSpacing) continue;
const [ps, qs] = [span(p), span(q)];
if (Math.min(ps[1], qs[1]) - Math.max(ps[0], qs[0]) > -1) parent[find(i)] = find(j);
}
}
const clusters = new Map();
channels.forEach((plan, i) => {
const list = clusters.get(find(i)) ?? [];
list.push(plan);
clusters.set(find(i), list);
});
for (const cluster of clusters.values()) {
if (cluster.length < 2) continue;
const detour = cluster[0].kind === "detour";
const outward = cluster[0].outward;
const base = detour
? cluster.reduce((m, p) => (outward > 0 ? Math.max(m, p.channel) : Math.min(m, p.channel)), cluster[0].channel)
: cluster.reduce((sum, p) => sum + p.channel, 0) / cluster.length;
const room = detour ? pinSpacing : Math.max(0, Math.min(pinSpacing, ...cluster.map((p) => (p.hi - p.lo) / (cluster.length - 1))));
const slot = (i: number) => (detour ? base + outward * i * room : base + (i - (cluster.length - 1) / 2) * room);
let bestOrder = cluster;
let bestTangles = Infinity;
for (const order of orders(cluster)) {
order.forEach((plan, i) => {
plan.channel = detour ? slot(i) : Math.max(plan.lo, Math.min(plan.hi, slot(i)));
build(plan);
});
let count = 0;
for (let i = 0; i < order.length; i++) for (let j = i + 1; j < order.length; j++) count += tangles(order[i].points, order[j].points);
if (count < bestTangles) {
bestTangles = count;
bestOrder = [...order];
}
if (count === 0) break;
}
bestOrder.forEach((plan, i) => {
plan.channel = detour ? slot(i) : Math.max(plan.lo, Math.min(plan.hi, slot(i)));
build(plan);
});
}
return plans.map((plan) => (plan ? simplify(plan.points) : null));
}
function score(plan: Plan, obstacles: Box[], width: number, height: number) {
const points = simplify(plan.points);
const inset = (box: Box, by: number): Box => ({ l: box.l + by, t: box.t + by, r: box.r - by, b: box.b - by });
let cost = (points.length - 2) * 20;
for (let i = 0; i < points.length - 1; i++) {
const [p, q] = [points[i], points[i + 1]];
cost += Math.hypot(q.x - p.x, q.y - p.y) * 0.25;
for (const box of obstacles) if (hits(p, q, inset(box, -2))) cost += 10000;
if (hits(p, q, inset(plan.a, 1)) || hits(p, q, inset(plan.b, 1))) cost += 10000;
}
for (const p of points) {
const outside = Math.max(0, -p.x, p.x - width) + Math.max(0, -p.y, p.y - height);
cost += outside * 4;
}
return cost;
}
/** Orderings to try for a cluster: all of them while that's cheap, else the two obvious ones. */
function orders(list: Plan[]): Plan[][] {
const mid = (p: Plan) => {
const [s, e] = [p.points[0], p.points[p.points.length - 1]];
return isHorizontal(p.from) ? s.y + e.y : s.x + e.x;
};
const sorted = [...list].sort((p, q) => mid(p) - mid(q));
if (list.length > 5) return [sorted, [...sorted].reverse()];
const out: Plan[][] = [];
const permute = (rest: Plan[], acc: Plan[]) => {
if (!rest.length) out.push(acc);
rest.forEach((p, i) => permute([...rest.slice(0, i), ...rest.slice(i + 1)], [...acc, p]));
};
permute(sorted, []);
return out;
}
/* ─────────────────────────────────────────────────────────
* ENGINE
* ───────────────────────────────────────────────────────── */
type Options = {
flow: CircuitFlow;
autoPlay: boolean;
interval: number;
speed: number;
fanout: "all" | "one";
highlight: "path" | "neighbors" | "none";
radius: number;
pinSpacing: number;
pins: boolean;
trace: string;
packet: string;
};
type Engine = {
configure: (options: Options) => void;
send: (node: string) => void;
destroy: () => void;
};
const SVG = "http://www.w3.org/2000/svg";
/** Packets a trace can carry at once. */
const SLOTS = 3;
/** Length of a packet's glowing tail, in px. */
const TAIL = 44;
/** Seconds a card keeps data-circuit-pulse after a signal lands. */
const PULSE = 0.5;
/** Seconds within which a card passes on only the first of several signals. */
const COOLDOWN = 0.3;
type Slot = { glow: SVGPathElement; body: SVGPathElement; core: SVGPathElement; head: SVGCircleElement; halo: SVGCircleElement };
type Wire = {
trace: CircuitTrace;
group: SVGGElement;
track: SVGPathElement;
lit: SVGPathElement;
pins: SVGCircleElement[];
flash: SVGCircleElement;
slots: Slot[];
shape: Shape | null;
drawFrom: number;
flashAt: number;
};
type Packet = { wire: Wire; t0: number; duration: number; hops: number; arrived: boolean };
function svg(tag: K, attrs: Record, parent: Element) {
const node = document.createElementNS(SVG, tag);
for (const [key, value] of Object.entries(attrs)) node.setAttribute(key, String(value));
parent.appendChild(node);
return node;
}
const ease = (t: number) => 0.45 * t + 0.55 * (0.5 - Math.cos(Math.PI * t) / 2);
function createEngine(root: HTMLDivElement, layer: SVGSVGElement, arrive: (node: string, from: string) => void): Engine {
let options: Options | null = null;
let flowKey = "";
let traces: CircuitTrace[] = [];
let wires: Wire[] = [];
const nodes = new Map();
let boxes = new Map();
let lastBoxes = new Float64Array(0);
let routed = false;
let packets: Packet[] = [];
const nextAt = new Map();
const lastSent = new Map();
const turn = new Map();
const pulses = new Map();
let active: string | null = null;
let clearTimer = 0;
let visible = false;
let raf = 0;
let last = 0;
let wakeUntil = 0;
let firstDraw = -1;
const reduced = window.matchMedia("(prefers-reduced-motion: reduce)");
const now = () => performance.now() / 1000;
/* nodes */
function scan() {
nodes.clear();
root.querySelectorAll("[data-circuit]").forEach((node) => {
const id = node.dataset.circuit;
if (!id || nodes.has(id) || node.closest("[data-circuit-root]") !== root) return;
nodes.set(id, node);
});
resize.disconnect();
resize.observe(root);
nodes.forEach((node) => resize.observe(node));
lastBoxes = new Float64Array(0);
wake();
}
/** Read every node box relative to the circuit; true if anything moved. */
function measure() {
const frame = root.getBoundingClientRect();
const sx = root.offsetWidth ? frame.width / root.offsetWidth : 1;
const sy = root.offsetHeight ? frame.height / root.offsetHeight : 1;
const ox = frame.left + root.clientLeft * sx;
const oy = frame.top + root.clientTop * sy;
const next = new Map();
const flat = new Float64Array(nodes.size * 4 + 2);
flat[0] = root.clientWidth;
flat[1] = root.clientHeight;
let i = 2;
nodes.forEach((node, id) => {
const r = node.getBoundingClientRect();
if (!r.width && !r.height) return;
const box = { l: (r.left - ox) / sx, t: (r.top - oy) / sy, r: (r.right - ox) / sx, b: (r.bottom - oy) / sy };
next.set(id, box);
flat[i++] = box.l;
flat[i++] = box.t;
flat[i++] = box.r;
flat[i++] = box.b;
});
boxes = next;
let moved = flat.length !== lastBoxes.length;
for (let j = 0; !moved && j < flat.length; j++) moved = Math.abs(flat[j] - lastBoxes[j]) > 0.25;
if (moved) lastBoxes = flat;
return moved;
}
/* wires */
function rebuild() {
if (!options) return;
layer.replaceChildren();
packets = [];
wires = traces.map((trace) => {
const group = svg("g", { class: "transition-opacity duration-300" }, layer);
const track = svg("path", { fill: "none", stroke: "currentColor", "stroke-width": 1.25, class: options!.trace }, group);
const pinGroup = svg("g", { class: options!.trace, fill: "currentColor" }, group);
const pins = [svg("circle", { r: 2.75, opacity: 0 }, pinGroup), svg("circle", { r: 2.75, opacity: 0 }, pinGroup)];
const paint = svg("g", { class: options!.packet, fill: "none", stroke: "currentColor", "stroke-linecap": "round" }, group);
if (trace.color) paint.style.color = trace.color;
const lit = svg("path", { "stroke-width": 1.25, opacity: 0, class: "transition-opacity duration-300" }, paint);
const flash = svg("circle", { r: 2.75, fill: "currentColor", stroke: "none", opacity: 0 }, paint);
const slots = Array.from({ length: SLOTS }, () => ({
glow: svg("path", { "stroke-width": 7, opacity: 0, "stroke-opacity": 0.16 }, paint),
body: svg("path", { "stroke-width": 1.5, opacity: 0, "stroke-opacity": 0.55 }, paint),
core: svg("path", { "stroke-width": 2, opacity: 0 }, paint),
halo: svg("circle", { r: 6, fill: "currentColor", stroke: "none", opacity: 0, "fill-opacity": 0.2 }, paint),
head: svg("circle", { r: 2.25, fill: "currentColor", stroke: "none", opacity: 0 }, paint),
}));
return { trace, group, track, lit, pins, flash, slots, shape: null, drawFrom: -1, flashAt: -Infinity };
});
lastBoxes = new Float64Array(0);
applyHighlight();
wake();
}
function reroute(t: number) {
if (!options) return;
const points = route(traces, boxes, root.clientWidth, root.clientHeight, options.pinSpacing);
const depth = depths();
wires.forEach((wire, i) => {
const p = points[i];
if (!p || p.length < 2) {
wire.shape = null;
wire.group.style.display = "none";
return;
}
wire.group.style.display = "";
const s = shape(p, options!.radius);
wire.shape = s;
for (const path of [wire.track, wire.lit, ...wire.slots.flatMap((slot) => [slot.glow, slot.body, slot.core])]) {
path.setAttribute("d", s.d);
path.setAttribute("pathLength", String(s.length));
}
wire.pins[0].setAttribute("cx", String(s.start.x));
wire.pins[0].setAttribute("cy", String(s.start.y));
wire.pins[1].setAttribute("cx", String(s.end.x));
wire.pins[1].setAttribute("cy", String(s.end.y));
wire.flash.setAttribute("cx", String(s.end.x));
wire.flash.setAttribute("cy", String(s.end.y));
if (wire.drawFrom < 0) {
if (firstDraw < 0) firstDraw = t;
// Traces present at mount draw in stage by stage; ones that show up later draw on their own.
wire.drawFrom = t - firstDraw < 0.1 ? t + (depth.get(wire.trace.from) ?? 0) * 0.16 : t;
}
});
routed = true;
}
function depths() {
const depth = new Map();
const incoming = new Set(traces.map((t) => t.to));
let frontier = [...new Set(traces.map((t) => t.from))].filter((id) => !incoming.has(id));
frontier.forEach((id) => depth.set(id, 0));
for (let level = 1; frontier.length && level < 32; level++) {
const next: string[] = [];
for (const t of traces) {
if (frontier.includes(t.from) && !depth.has(t.to)) {
depth.set(t.to, level);
next.push(t.to);
}
}
frontier = next;
}
return depth;
}
/* signals */
const live = (wire: Wire) => wire.shape !== null;
const outOf = (node: string) => wires.filter((w) => w.trace.from === node && live(w));
function emit(node: string, t: number, hops: number, delay: number) {
if (!options) return;
let out = outOf(node);
if (!out.length) return;
if (options.fanout === "one") {
const i = turn.get(node) ?? 0;
turn.set(node, i + 1);
out = [out[i % out.length]];
}
lastSent.set(node, t);
for (const wire of out) {
const length = wire.shape!.length;
const mine = packets.filter((p) => p.wire === wire);
if (mine.length >= SLOTS) packets.splice(packets.indexOf(mine[0]), 1);
packets.push({ wire, t0: t + delay, duration: Math.min(2.4, Math.max(0.45, length / options.speed)), hops, arrived: false });
}
}
function land(wire: Wire, t: number, hops: number) {
const { from, to } = wire.trace;
wire.flashAt = t;
pulse(to, t);
arrive(to, from);
if (hops < 24 && t - (lastSent.get(to) ?? -Infinity) > COOLDOWN) emit(to, t, hops + 1, 0.1);
}
function pulse(node: string, t: number) {
const element = nodes.get(node);
if (!element) return;
element.setAttribute("data-circuit-pulse", "");
pulses.set(node, t + PULSE);
}
function send(node: string) {
const t = now();
if (!options) return;
if (!outOf(node).length) {
pulse(node, t);
wake(PULSE + 0.1);
return;
}
if (reduced.matches) {
// No packets to watch: the signal lands everywhere it would have gone, at once.
const seen = new Set([node]);
let frontier = [node];
while (frontier.length) {
const next: string[] = [];
for (const id of frontier) {
let out = outOf(id);
if (options.fanout === "one" && out.length) {
const i = turn.get(id) ?? 0;
turn.set(id, i + 1);
out = [out[i % out.length]];
}
for (const wire of out) {
pulse(wire.trace.to, t);
arrive(wire.trace.to, id);
if (!seen.has(wire.trace.to)) {
seen.add(wire.trace.to);
next.push(wire.trace.to);
}
}
}
frontier = next;
}
wake(PULSE + 0.1);
return;
}
emit(node, t, 0, 0);
wake();
}
/* frame */
function frame(ms: number) {
raf = 0;
const t = ms / 1000;
// Back from a hidden tab or off screen: pause time instead of replaying it.
if (last && t - last > 0.25) {
const skip = t - last - 1 / 60;
for (const p of packets) p.t0 += skip;
nextAt.forEach((at, id) => nextAt.set(id, at + skip));
for (const w of wires) if (w.drawFrom > 0) w.drawFrom += skip;
}
last = t;
if (measure() || !routed) reroute(t);
const motion = !reduced.matches;
let busy = false;
for (const wire of wires) {
const s = wire.shape;
if (!s) continue;
// Draw-in.
const p = motion ? Math.min(1, Math.max(0, (t - wire.drawFrom) / 0.7)) : 1;
if (p < 1) {
busy = true;
wire.track.setAttribute("stroke-dasharray", `${s.length} ${s.length + 1}`);
wire.track.setAttribute("stroke-dashoffset", String(s.length * (1 - ease(p))));
} else if (wire.track.hasAttribute("stroke-dasharray")) {
wire.track.removeAttribute("stroke-dasharray");
wire.track.removeAttribute("stroke-dashoffset");
}
const pinsOn = options?.pins ? 1 : 0;
wire.pins[0].setAttribute("opacity", String(pinsOn * Math.min(1, p * 4)));
wire.pins[1].setAttribute("opacity", String(pinsOn * Math.max(0, p * 4 - 3)));
// Landing flash on the pin.
const f = (t - wire.flashAt) / 0.6;
if (f >= 0 && f < 1) {
busy = true;
wire.flash.setAttribute("opacity", String(pinsOn * (1 - f)));
wire.flash.setAttribute("r", String(2.75 + 3 * ease(f)));
} else wire.flash.setAttribute("opacity", "0");
}
if (motion && options) {
// Sources send on their own once their traces are drawn.
if (options.autoPlay) {
const sources = sourceList();
sources.forEach((id, i) => {
const ready = Math.max(...outOf(id).map((w) => w.drawFrom + 0.7));
if (!nextAt.has(id)) nextAt.set(id, ready + (i * options!.interval) / sources.length);
let at = nextAt.get(id)!;
if (t >= at) {
emit(id, at, 0, 0);
at = Math.max(at + options!.interval * (0.85 + Math.random() * 0.3), t);
nextAt.set(id, at);
}
});
busy = busy || sources.length > 0;
}
drawPackets(t);
busy = busy || packets.length > 0;
} else {
packets = [];
drawPackets(t);
}
pulses.forEach((until, id) => {
if (t < until) {
busy = true;
return;
}
nodes.get(id)?.removeAttribute("data-circuit-pulse");
pulses.delete(id);
});
if (visible && (busy || t < wakeUntil)) raf = requestAnimationFrame(frame);
else last = 0;
}
function sourceList() {
const fed = new Set(wires.filter(live).map((w) => w.trace.to));
const senders = [...new Set(wires.filter(live).map((w) => w.trace.from))];
const sources = senders.filter((id) => !fed.has(id));
return sources.length ? sources : senders.slice(0, 1);
}
function drawPackets(t: number) {
const used = new Map();
const keep: Packet[] = [];
for (const p of packets) {
const s = p.wire.shape;
if (!s) continue;
const k = (t - p.t0) / p.duration;
if (k < 0) {
keep.push(p);
continue;
}
const length = s.length;
const tail = Math.min(TAIL, length * 0.6);
// The head eases to the far pin, then the tail drains into the card at full speed.
const head = k <= 1 ? length * ease(k) : length + (k - 1) * p.duration * (options?.speed ?? 260);
if (k >= 1 && !p.arrived) {
p.arrived = true;
land(p.wire, t, p.hops);
}
if (head - tail >= length) continue;
keep.push(p);
const slotIndex = used.get(p.wire) ?? 0;
used.set(p.wire, slotIndex + 1);
const slot = p.wire.slots[slotIndex];
if (!slot) continue;
const from = Math.max(0, head - tail);
const to = Math.min(head, length);
const dash = (start: number, end: number, path: SVGPathElement) => {
path.setAttribute("stroke-dasharray", `${Math.max(0, end - start)} ${length + TAIL * 2}`);
path.setAttribute("stroke-dashoffset", String(-start));
path.setAttribute("opacity", end - start > 0.5 ? "1" : "0");
};
dash(from, to, slot.glow);
dash(from, to, slot.body);
dash(Math.max(from, head - tail * 0.35), to, slot.core);
const at = pointAt(s, to);
const fade = head > length ? Math.max(0, 1 - (head - length) / (tail * 0.5)) : Math.min(1, head / 8);
for (const dot of [slot.head, slot.halo]) {
dot.setAttribute("cx", String(at.x));
dot.setAttribute("cy", String(at.y));
dot.setAttribute("opacity", String(fade));
}
}
packets = keep;
for (const wire of wires) {
for (let i = used.get(wire) ?? 0; i < SLOTS; i++) {
const slot = wire.slots[i];
for (const part of [slot.glow, slot.body, slot.core, slot.head, slot.halo]) part.setAttribute("opacity", "0");
}
}
}
function wake(seconds = 1) {
wakeUntil = Math.max(wakeUntil, now() + seconds);
if (!raf && visible) raf = requestAnimationFrame(frame);
}
/* highlight */
function applyHighlight() {
const mode = options?.highlight ?? "path";
const lit = new Set();
const linked = new Set();
if (active && mode !== "none") {
linked.add(active);
const walk = (forward: boolean) => {
let frontier = [active!];
const seen = new Set(frontier);
while (frontier.length) {
const next: string[] = [];
for (const wire of wires) {
const [here, there] = forward ? [wire.trace.from, wire.trace.to] : [wire.trace.to, wire.trace.from];
if (!frontier.includes(here)) continue;
lit.add(wire);
linked.add(there);
if (!seen.has(there) && mode === "path") {
seen.add(there);
next.push(there);
}
}
frontier = next;
}
};
walk(true);
walk(false);
}
for (const wire of wires) {
wire.group.style.opacity = active && mode !== "none" && !lit.has(wire) ? "0.25" : "";
wire.lit.setAttribute("opacity", lit.has(wire) ? "0.5" : "0");
}
nodes.forEach((node, id) => {
if (!active || mode === "none") node.removeAttribute("data-circuit-state");
else node.setAttribute("data-circuit-state", id === active ? "active" : linked.has(id) ? "linked" : "dimmed");
});
}
function setActive(node: string | null) {
window.clearTimeout(clearTimer);
if (node === null) {
// A short grace period, so crossing the gap between two cards doesn't flash everything back.
clearTimer = window.setTimeout(() => {
active = null;
applyHighlight();
}, 90);
return;
}
if (node === active) return;
active = node;
applyHighlight();
if (now() - (lastSent.get(node) ?? -Infinity) > 0.6) send(node);
}
function nodeOf(target: EventTarget | null) {
if (!(target instanceof Element)) return null;
const element = target.closest("[data-circuit]");
const id = element?.dataset.circuit;
return id && nodes.get(id) === element ? id : null;
}
const onOver = (e: PointerEvent) => {
if (e.pointerType !== "touch") setActive(nodeOf(e.target));
};
const onLeave = (e: PointerEvent) => {
if (e.pointerType !== "touch") setActive(null);
};
const onDown = (e: PointerEvent) => {
if (e.pointerType !== "touch") return;
const node = root.contains(e.target as Node) ? nodeOf(e.target) : null;
if (node && node === active) setActive(null);
else setActive(node);
};
const onFocusIn = (e: FocusEvent) => {
const node = nodeOf(e.target);
if (node) setActive(node);
};
const onFocusOut = (e: FocusEvent) => {
if (!nodeOf(e.relatedTarget)) setActive(null);
};
/* observers */
const resize = new ResizeObserver(() => wake());
const mutations = new MutationObserver((records) => {
if (records.some((r) => !layer.contains(r.target) && r.target !== layer)) scan();
});
mutations.observe(root, { childList: true, subtree: true, attributes: true, attributeFilter: ["data-circuit"] });
const sight = new IntersectionObserver(([entry]) => {
visible = entry.isIntersecting;
if (visible) wake();
});
sight.observe(root);
const onAnyChange = () => wake();
root.addEventListener("transitionrun", onAnyChange);
root.addEventListener("animationstart", onAnyChange);
root.addEventListener("pointerover", onOver);
root.addEventListener("pointerleave", onLeave);
root.addEventListener("focusin", onFocusIn);
root.addEventListener("focusout", onFocusOut);
document.addEventListener("pointerdown", onDown);
window.addEventListener("resize", onAnyChange);
reduced.addEventListener("change", onAnyChange);
document.fonts?.ready.then(() => wake());
scan();
return {
configure(next) {
const key = JSON.stringify(next.flow);
const restyle = !options || options.trace !== next.trace || options.packet !== next.packet;
const reshape = options && (options.radius !== next.radius || options.pinSpacing !== next.pinSpacing);
options = next;
if (key !== flowKey || restyle) {
flowKey = key;
traces = parseFlow(next.flow);
routed = false;
rebuild();
} else if (reshape) {
routed = false;
}
if (!next.autoPlay) nextAt.clear();
applyHighlight();
wake();
},
send,
destroy() {
cancelAnimationFrame(raf);
window.clearTimeout(clearTimer);
resize.disconnect();
mutations.disconnect();
sight.disconnect();
root.removeEventListener("transitionrun", onAnyChange);
root.removeEventListener("animationstart", onAnyChange);
root.removeEventListener("pointerover", onOver);
root.removeEventListener("pointerleave", onLeave);
root.removeEventListener("focusin", onFocusIn);
root.removeEventListener("focusout", onFocusOut);
document.removeEventListener("pointerdown", onDown);
window.removeEventListener("resize", onAnyChange);
reduced.removeEventListener("change", onAnyChange);
nodes.forEach((node) => {
node.removeAttribute("data-circuit-state");
node.removeAttribute("data-circuit-pulse");
});
layer.replaceChildren();
},
};
}
```