From 9fd98370cfb64c1406d99713eb82c9d2feff5f40 Mon Sep 17 00:00:00 2001 From: WaylandYang <145302500+WaylandYang@users.noreply.github.com> Date: Thu, 15 Oct 2026 17:22:20 +0800 Subject: [PATCH] Add a promotional film, played by the material itself /dev/promo (development only) is a 31-second film of Solid Glass made of its own components: the panes, their edges, the one state, an agent at work, tuning the accent, and the install command. Every frame is a function of one clock, so scripts/record.mjs can step it and record the film frame by frame with ffmpeg. The headless browser that shot.mjs started is now in browser.mjs, shared by both scripts. The banner's wordmark and its pane backing are exported for the film to use. Co-Authored-By: Claude Opus 5.5 Signed-off-by: WaylandYang <145302500+WaylandYang@users.noreply.github.com> --- scripts/browser.mjs | 64 ++++++ scripts/record.mjs | 86 ++++++++ scripts/shot.mjs | 59 +---- src/App.tsx | 3 + src/pages/dev-banner.tsx | 6 +- src/pages/dev-promo.tsx | 453 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 614 insertions(+), 57 deletions(-) create mode 100644 scripts/browser.mjs create mode 100644 scripts/record.mjs create mode 100644 src/pages/dev-promo.tsx diff --git a/scripts/browser.mjs b/scripts/browser.mjs new file mode 100644 index 0000000..8f87bc6 --- /dev/null +++ b/scripts/browser.mjs @@ -0,0 +1,64 @@ +/** + * A headless Chromium driven over the DevTools protocol, shared by the scripts that look at pages: + * shot.mjs (one picture) and record.mjs (a film, frame by frame). + */ +import { spawn } from "node:child_process" +import { existsSync, readdirSync } from "node:fs" +import { homedir } from "node:os" +import { join } from "node:path" + +/** The browser to run: $CHROME, Playwright's headless shell, or an installed Chrome. */ +export function findBrowser() { + if (process.env.CHROME) return process.env.CHROME + for (const dir of [join(homedir(), "Library/Caches/ms-playwright"), join(homedir(), ".cache/ms-playwright")]) { + if (!existsSync(dir)) continue + for (const name of readdirSync(dir).filter((entry) => entry.startsWith("chromium_headless_shell")).sort().reverse()) { + for (const sub of readdirSync(join(dir, name))) { + const bin = join(dir, name, sub, "chrome-headless-shell") + if (existsSync(bin)) return bin + } + } + } + for (const bin of ["/Applications/Google Chrome.app/Contents/MacOS/Google Chrome", "/usr/bin/google-chrome", "/usr/bin/chromium"]) { + if (existsSync(bin)) return bin + } + console.error("No browser found. Set CHROME, or run: npx playwright install chromium-headless-shell") + process.exit(2) +} + +export const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms)) + +/** Start the browser and connect to its page. `send(method, params)` speaks the protocol; `close()` ends it. */ +export async function openBrowser() { + const port = 9300 + Math.floor(Math.random() * 500) + const flags = ["--headless=new", "--no-sandbox", "--hide-scrollbars", `--remote-debugging-port=${port}`] + if (process.env.PROXY) flags.push(`--proxy-server=${process.env.PROXY}`) + const chrome = spawn(findBrowser(), [...flags, "about:blank"], { stdio: "ignore" }) + let target + for (let i = 0; i < 80 && !target; i++) { + await sleep(100) + try { + target = (await (await fetch(`http://127.0.0.1:${port}/json`)).json()).find((entry) => entry.type === "page") + } catch { + // not listening yet + } + } + if (!target) { + chrome.kill() + throw new Error("the browser did not start") + } + const socket = new WebSocket(target.webSocketDebuggerUrl) + await new Promise((resolve) => (socket.onopen = resolve)) + let id = 0 + const pending = new Map() + socket.onmessage = (event) => { + const message = JSON.parse(event.data) + if (message.id && pending.has(message.id)) pending.get(message.id)(message.result) + } + const send = (method, params = {}) => + new Promise((resolve) => { + pending.set(++id, resolve) + socket.send(JSON.stringify({ id, method, params })) + }) + return { send, close: () => chrome.kill() } +} diff --git a/scripts/record.mjs b/scripts/record.mjs new file mode 100644 index 0000000..e663cc9 --- /dev/null +++ b/scripts/record.mjs @@ -0,0 +1,86 @@ +/** + * Record the promotional film (/dev/promo) frame by frame into a video. + * + * node scripts/record.mjs [url] [fps] + * + * The page draws every frame from one clock. This sets the clock to each frame's time, lets the + * page draw, and photographs it, so the film comes out the same every time and as smooth as its + * frame rate, however long a frame takes to draw. The browser's own clocks are stood in for by the + * same time (requestAnimationFrame, performance.now, Date.now, CSS animations), so parts that animate + * themselves, like the status glyphs, keep time with the rest. + * + * Needs ffmpeg: $FFMPEG, or one on the PATH. url defaults to the dev server's /dev/promo, fps to 30. + * + * Environment: + * FFMPEG the ffmpeg to run + * SCALE device pixels per CSS pixel (default 1: a 1920 by 1080 film) + * FROM, TO record only part of the film, in ms + */ +import { spawn } from "node:child_process" + +import { openBrowser, sleep } from "./browser.mjs" + +const [out, url = "http://localhost:5191/dev/promo?capture", fps = "30"] = process.argv.slice(2) +if (!out) { + console.error("usage: node scripts/record.mjs [url] [fps]") + process.exit(2) +} + +// Stand-ins for the browser's clocks, put in place before the page's own scripts run. +const CLOCK = `(() => { + let now = 0 + const base = Date.now() + const queue = new Map() + let next = 0 + window.requestAnimationFrame = (callback) => (queue.set(++next, callback), next) + window.cancelAnimationFrame = (handle) => queue.delete(handle) + performance.now = () => now + Date.now = () => base + now + window.__frame = (t) => { + now = t + const callbacks = [...queue.values()] + queue.clear() + for (const callback of callbacks) { + try { callback(t) } catch (error) { console.error(error) } + } + for (const animation of document.getAnimations()) { + try { animation.pause(); animation.currentTime = t } catch {} + } + } +})()` + +const { send, close } = await openBrowser() +const ffmpeg = spawn( + process.env.FFMPEG ?? "ffmpeg", + ["-y", "-loglevel", "error", "-f", "image2pipe", "-framerate", fps, "-c:v", "mjpeg", "-i", "-", "-c:v", "libx264", "-preset", "slow", "-crf", "16", "-pix_fmt", "yuv420p", "-movflags", "+faststart", out], + { stdio: ["pipe", "inherit", "inherit"] } +) + +try { + await send("Emulation.setDeviceMetricsOverride", { width: 1920, height: 1080, deviceScaleFactor: +(process.env.SCALE ?? 1), mobile: false }) + await send("Page.enable") + await send("Page.addScriptToEvaluateOnNewDocument", { source: CLOCK }) + await send("Page.navigate", { url }) + await sleep(3500) // the fonts, and the first draw + + const evaluate = async (expression) => (await send("Runtime.evaluate", { expression, returnByValue: true, awaitPromise: true }))?.result?.value + const duration = await evaluate("window.__promoDuration") + if (!duration) throw new Error("the page has no film on it: is the dev server running, and the url /dev/promo?capture?") + const from = +(process.env.FROM ?? 0) + const to = Math.min(+(process.env.TO ?? duration), duration) + const frames = Math.round(((to - from) / 1000) * +fps) + + for (let frame = 0; frame < frames; frame++) { + const t = from + (frame * 1000) / +fps + // twice: what the clock sets off (a glyph's next frame) is drawn on the second pass + await evaluate(`(async () => { window.__seek(${t}); window.__frame(${t}); await new Promise((r) => setTimeout(r, 0)); window.__frame(${t}); await new Promise((r) => setTimeout(r, 16)); return 1 })()`) + const shot = await send("Page.captureScreenshot", { format: "jpeg", quality: 95 }) + if (!ffmpeg.stdin.write(Buffer.from(shot.data, "base64"))) await new Promise((resolve) => ffmpeg.stdin.once("drain", resolve)) + if (frame % +fps === 0) process.stdout.write(`\r${Math.round(t / 1000)}s / ${Math.round(to / 1000)}s`) + } + process.stdout.write("\n") +} finally { + ffmpeg.stdin.end() + await new Promise((resolve) => ffmpeg.on("close", resolve)) + close() +} diff --git a/scripts/shot.mjs b/scripts/shot.mjs index 1dea893..59cfd61 100644 --- a/scripts/shot.mjs +++ b/scripts/shot.mjs @@ -19,10 +19,9 @@ * There are no unit tests here: what this repository makes is how things look. This is the tool * for looking, and for saying in a pull request what was looked at. */ -import { spawn } from "node:child_process" -import { existsSync, readdirSync, writeFileSync } from "node:fs" -import { homedir } from "node:os" -import { join } from "node:path" +import { writeFileSync } from "node:fs" + +import { openBrowser, sleep } from "./browser.mjs" const [out, url, width, height, scale = "2", wait = "2500"] = process.argv.slice(2) if (!out || !url || !width || !height) { @@ -30,56 +29,8 @@ if (!out || !url || !width || !height) { process.exit(2) } -function browser() { - if (process.env.CHROME) return process.env.CHROME - const cache = join(homedir(), "Library/Caches/ms-playwright") - const linux = join(homedir(), ".cache/ms-playwright") - for (const dir of [cache, linux]) { - if (!existsSync(dir)) continue - for (const name of readdirSync(dir).filter((entry) => entry.startsWith("chromium_headless_shell")).sort().reverse()) { - for (const sub of readdirSync(join(dir, name))) { - const bin = join(dir, name, sub, "chrome-headless-shell") - if (existsSync(bin)) return bin - } - } - } - for (const bin of ["/Applications/Google Chrome.app/Contents/MacOS/Google Chrome", "/usr/bin/google-chrome", "/usr/bin/chromium"]) { - if (existsSync(bin)) return bin - } - console.error("No browser found. Set CHROME, or run: npx playwright install chromium-headless-shell") - process.exit(2) -} - -const port = 9300 + Math.floor(Math.random() * 500) -const flags = ["--headless=new", "--no-sandbox", "--hide-scrollbars", `--remote-debugging-port=${port}`] -if (process.env.PROXY) flags.push(`--proxy-server=${process.env.PROXY}`) -const chrome = spawn(browser(), [...flags, "about:blank"], { stdio: "ignore" }) -const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms)) - +const { send, close } = await openBrowser() try { - let target - for (let i = 0; i < 80 && !target; i++) { - await sleep(100) - try { - target = (await (await fetch(`http://127.0.0.1:${port}/json`)).json()).find((entry) => entry.type === "page") - } catch { - // not listening yet - } - } - if (!target) throw new Error("the browser did not start") - const socket = new WebSocket(target.webSocketDebuggerUrl) - await new Promise((resolve) => (socket.onopen = resolve)) - let id = 0 - const pending = new Map() - socket.onmessage = (event) => { - const message = JSON.parse(event.data) - if (message.id && pending.has(message.id)) pending.get(message.id)(message.result) - } - const send = (method, params = {}) => - new Promise((resolve) => { - pending.set(++id, resolve) - socket.send(JSON.stringify({ id, method, params })) - }) const run = async (expression) => { const result = await send("Runtime.evaluate", { expression, returnByValue: true, awaitPromise: true }) console.log(JSON.stringify(result?.result?.value ?? result?.exceptionDetails?.exception?.description ?? null, null, 1)) @@ -99,5 +50,5 @@ try { const shot = await send("Page.captureScreenshot", webp ? { format: "webp", quality: +(process.env.QUALITY ?? 86) } : { format: "png" }) writeFileSync(out, Buffer.from(shot.data, "base64")) } finally { - chrome.kill() + close() } diff --git a/src/App.tsx b/src/App.tsx index 9be1386..c1c1dec 100644 --- a/src/App.tsx +++ b/src/App.tsx @@ -6,6 +6,7 @@ import { Toaster as ToastToaster } from "@/components/ui/toast" import { TooltipProvider } from "@/components/ui/tooltip" import { Home } from "@/pages/home" import { DevBanner } from "@/pages/dev-banner" +import { DevPromo } from "@/pages/dev-promo" import { DevExamples } from "@/pages/dev-examples" import { ComponentsIndex, DocPage, DocsLayout } from "@/site/docs" import { SiteFooter } from "@/site/site-footer" @@ -30,6 +31,8 @@ export function App() { const { pathname } = useLocation() // The README's banner is a picture of the material and nothing else: no header, no footer behind it. if (import.meta.env.DEV && pathname === "/dev/banner") return + // The promotional film, played by the material itself (and recorded by scripts/record.mjs). + if (import.meta.env.DEV && pathname === "/dev/promo") return // A block by itself, in a window of its own: no header, no footer round it. if (pathname.startsWith("/view/")) { return ( diff --git a/src/pages/dev-banner.tsx b/src/pages/dev-banner.tsx index 3a9f41a..91ef0bf 100644 --- a/src/pages/dev-banner.tsx +++ b/src/pages/dev-banner.tsx @@ -12,7 +12,7 @@ import { SolidGlassMark } from "@/site/logo" * a thin dark edge underneath and its shadow on the page. No gradient; like a pane, a letter is * finished at its edges. */ -function GlassWordmark({ first, second }: { first: string; second: string }) { +export function GlassWordmark({ first, second, scale = 1 }: { first: string; second: string; scale?: number }) { const id = React.useId() // Every layer is the same line of type. Only the face is told the two words apart. const letters = (props: React.SVGProps, face?: [string, string]) => ( @@ -22,7 +22,7 @@ function GlassWordmark({ first, second }: { first: string; second: string }) { ) return ( - + {/* What is left of the letters once the same letters, moved down a little, are taken out: their top edges. */} @@ -55,7 +55,7 @@ function GlassWordmark({ first, second }: { first: string; second: string }) { // here, that tint alone would turn clear and take the light's colour, which is liquid glass's look. // So the page a pane lies on is put back under it: the page's colour, mostly opaque, beneath the // tint. The light then shows round a pane and along its edges, not through its face. -const over = (tint: string): React.CSSProperties => ({ +export const over = (tint: string): React.CSSProperties => ({ background: `linear-gradient(${tint}, ${tint}), color-mix(in oklch, var(--background) 90%, transparent)`, }) diff --git a/src/pages/dev-promo.tsx b/src/pages/dev-promo.tsx new file mode 100644 index 0000000..45cc45f --- /dev/null +++ b/src/pages/dev-promo.tsx @@ -0,0 +1,453 @@ +import * as React from "react" +import { flushSync } from "react-dom" +import { + CalculatorIcon, + CalendarIcon, + CheckIcon, + CreditCardIcon, + PlusIcon, + SettingsIcon, + SmileIcon, + UserIcon, +} from "lucide-react" + +import { cn } from "@/lib/utils" +import { AskCard } from "@/components/ui/ask-card" +import { Badge } from "@/components/ui/badge" +import { Button } from "@/components/ui/button" +import { Checkbox } from "@/components/ui/checkbox" +import { Composer } from "@/components/ui/composer" +import { Progress } from "@/components/ui/progress" +import { Slider } from "@/components/ui/slider" +import { StatusGlyph } from "@/components/ui/status-glyph" +import { Switch } from "@/components/ui/switch" +import { Tag } from "@/components/ui/tag" +import { StepList, type Step } from "@/components/ui/tool-steps" +import { DEFAULTS, overrides } from "@/create/options" +import { GlassWordmark, over } from "@/pages/dev-banner" +import { SolidGlassMark } from "@/site/logo" + +/* + * Development only (/dev/promo): a short film of the material, played by the material itself. Every + * frame is a function of one clock, `t`, in milliseconds, so the same frame can be drawn again: + * `scripts/record.mjs` steps the clock and photographs each frame. Left alone the page plays in a + * loop, scaled to the window; `?t=` holds one moment. + */ + +const W = 1920 +const H = 1080 +export const DURATION = 31_500 + +const clamp = (x: number) => Math.min(1, Math.max(0, x)) +const easeOut = (x: number) => 1 - Math.pow(1 - x, 3) +const easeInOut = (x: number) => (x < 0.5 ? 4 * x * x * x : 1 - Math.pow(-2 * x + 2, 3) / 2) +/** How far from `a` to `b` the clock is, eased: 0 before, 1 after. */ +const at = (t: number, a: number, b: number, ease = easeOut) => ease(clamp((t - a) / (b - a))) +/** On from `a` to `b`: fading in over the first `fadeIn` ms and out over the last `fadeOut`. */ +const life = (t: number, a: number, b: number, fadeIn = 600, fadeOut = 500) => + Math.min(at(t, a, a + fadeIn), 1 - at(t, b - fadeOut, b, easeInOut)) +const rise = (t: number, a: number, b: number, by = 24): React.CSSProperties => ({ + opacity: at(t, a, b), + transform: `translateY(${(1 - at(t, a, b)) * by}px)`, +}) + +// The scenes, end to end. +const INTRO = [0, 3_800] as const +const PANES = [3_800, 8_600] as const +const EDGES = [8_600, 12_400] as const +const STATE = [12_400, 16_200] as const +const AGENT = [16_200, 23_000] as const +const TUNE = [23_000, 27_400] as const +const LIGHT = [25_800, 27_400] as const +const END = [27_400, DURATION] as const + +function Caption({ t, from, to, eyebrow, title, sub }: { t: number; from: number; to: number; eyebrow?: string; title: string; sub?: string }) { + const o = life(t, from, to, 700, 450) + return ( +
+ {eyebrow &&

{eyebrow}

} +

{title}

+ {sub &&

{sub}

} +
+ ) +} + +/** Light behind the panes, drifting, so they have something to be solid against. */ +function Lights({ t }: { t: number }) { + const s = t / 1000 + const sweep = at(t, PANES[0] + 200, PANES[1], easeInOut) + return ( + <> + + + + + ) +} + +function Intro({ t }: { t: number }) { + const [a, b] = INTRO + const o = life(t, a, b, 1, 650) + return ( +
+
+ +
+
+ +
+

+ Designed for AI applications +

+
+ ) +} + +function Panes({ t }: { t: number }) { + const [a, b] = PANES + const o = life(t, a, b, 1, 600) + const enter = (index: number) => rise(t, a + 450 + index * 260, a + 1250 + index * 260, 70) + return ( +
+ +
+
+ Panel + Plant 2 · Line 3 + 1,472 + units per hour +
+ {[52, 78, 64, 88, 70, 38, 60].map((height, index) => ( + + ))} +
+
+
+ Card +
+ + Inspecting weld seams +
+ {["Read the sensor batch", "Compared with last week", "Flagged bearing 4"].map((line, index) => ( +
+ + {line} +
+ ))} +
+ +
+
+
+ Popover +
+ + Anomaly on bearing 4 + +12 °C +
+ Above baseline for six minutes. +
+ + +
+
+
+
+ ) +} + +function Edges({ t }: { t: number }) { + const [a, b] = EDGES + const o = life(t, a, b, 600, 600) + const zoom = at(t, a + 1100, a + 2700, easeInOut) + const glint = at(t, a + 500, a + 2300, easeInOut) + return ( +
+ +
+
+ {/* the glint, running along the top edge */} + +
+ +
+ Line 3 · Weld seams + Inspected 2,048 frames in 14 seconds +
+ Live +
+
+ {[44, 62, 58, 80, 72, 90, 66, 52, 74, 86, 60, 70].map((height, index) => ( + + ))} +
+
+
+
+ ) +} + +const MENU = [ + { icon: CalendarIcon, label: "Calendar" }, + { icon: SmileIcon, label: "Search emoji" }, + { icon: CalculatorIcon, label: "Calculator" }, + { icon: UserIcon, label: "Profile" }, + { icon: CreditCardIcon, label: "Billing" }, + { icon: SettingsIcon, label: "Settings" }, +] +const TABS = ["Docs", "Components", "Blocks", "Material", "Create"] +const TAB = 96 + +/** Where the one state is at this moment: it moves from mark to mark, easing between them. */ +function along(t: number, marks: [number, number][]) { + let value = marks[0][1] + for (let i = 1; i < marks.length; i++) { + const [when, to] = marks[i] + value = value + (to - value) * at(t, when, when + 380, easeInOut) + } + return value +} + +function OneState({ t }: { t: number }) { + const [a, b] = STATE + const o = life(t, a, b, 600, 500) + const row = along(t, [[0, 0], [a + 900, 2], [a + 1600, 4], [a + 2300, 1], [a + 3000, 3]]) + const tab = along(t, [[0, 0], [a + 1150, 2], [a + 1850, 4], [a + 2550, 1], [a + 3150, 3]]) + return ( +
+ + {/* drawn at the size it has on a page, and the whole enlarged */} +
+
+
+ + {MENU.map(({ icon: Icon, label }, index) => ( +
+ + {label} + ⌘{label[0]} +
+ ))} + {/* the pointer, on the row it is over */} + + + +
+
+
+ + {TABS.map((name, index) => ( + + {name} + + ))} +
+
+ {["Day", "Week", "Month"].map((name, index) => ( + + ))} + +
+

+ No colour for hover, another for selected, a third for open. One pane, wherever the attention is. +

+
+
+
+
+ ) +} + +const ASK = "Write that the weld seams on line 3 are fine, and check bearing 4 before the next shift." +const STEPS: [number, Omit][] = [ + [19_000, { id: "read", label: "Read 2,048 frames from camera 3", detail: "" }], + [19_700, { id: "compare", label: "Compared seams with last week's baseline" }], + [20_400, { id: "sensor", label: "Pulled bearing temperatures, line 3" }], +] + +function Agent({ t }: { t: number }) { + const [a, b] = AGENT + const o = life(t, a, b, 600, 500) + const typed = ASK.slice(0, Math.floor(ASK.length * at(t, a + 500, a + 1900, (x) => x))) + const sent = t >= a + 2050 + const steps: Step[] = STEPS.filter(([when]) => t >= when).map(([when, step]) => ({ ...step, status: t >= when + 600 ? "done" : "running" })) + const asking = t >= 21_200 + const doing = t < 19_000 ? "Thinking" : t < 20_400 ? "Reading the line" : asking ? "Waiting for you" : "Checking the bearings" + return ( +
+ +
+
+
+ {sent && ( +
+ {ASK} +
+ )} + {t >= 18_500 && ( +
+ + {doing} + {Math.max(0, Math.floor((t - 18_500) / 1000))}s +
+ )} + {steps.length > 0 && } + {asking && ( +
+ {}} + /> +
+ )} +
+ {}} placeholder="Ask the agent…" running={sent && !asking} /> +
+
+
+ ) +} + +const ACCENTS = ["violet", "blue", "teal", "green", "amber", "orange", "red", "ink"] as const + +function Tune({ t }: { t: number }) { + const [a, b] = TUNE + const o = life(t, a, b, 600, 500) + const light = t >= LIGHT[0] + const index = Math.min(ACCENTS.length - 1, Math.max(0, Math.floor((t - a - 500) / 300))) + const accent = light ? "blue" : ACCENTS[index] + const tint = overrides({ ...DEFAULTS, accent }, light ? "light" : "dark") + return ( +
+ + +
+
+
+ + + + Live + v2.4 +
+ + +
+
+ +
+ + {Math.round(18 + 70 * at(t, a + 500, b - 400, easeInOut))}% +
+
+
+
+ ) +} + +function End({ t }: { t: number }) { + const [a] = END + return ( +
+
+ + +
+
+ $ npx shadcn@latest add deeplethe/solid-glass/solid-glass +
+
+ deeplethe.github.io/solid-glass + + + by DeepLethe + +
+
+ ) +} + +declare global { + interface Window { + __seek?: (ms: number) => void + __promoDuration?: number + } +} + +export function DevPromo() { + const params = React.useMemo(() => new URLSearchParams(window.location.search), []) + const capture = params.has("capture") + const held = params.get("t") + const [t, setT] = React.useState(() => (held ? +held : 0)) + const [fit, setFit] = React.useState(1) + + // Played in a loop unless a moment is held or the recorder drives the clock. + React.useEffect(() => { + if (capture || held) return + const start = performance.now() + let frame = requestAnimationFrame(function step(now) { + setT((now - start) % DURATION) + frame = requestAnimationFrame(step) + }) + return () => cancelAnimationFrame(frame) + }, [capture, held]) + + React.useEffect(() => { + window.__seek = (ms) => flushSync(() => setT(ms)) + window.__promoDuration = DURATION + const resize = () => setFit(Math.min(window.innerWidth / W, window.innerHeight / H)) + resize() + window.addEventListener("resize", resize) + return () => { + delete window.__seek + delete window.__promoDuration + window.removeEventListener("resize", resize) + } + }, []) + + // The film is dark but for one stretch in daylight. + const light = t >= LIGHT[0] && t < LIGHT[1] + React.useLayoutEffect(() => { + document.documentElement.classList.toggle("dark", !light) + }, [light]) + + const on = (range: readonly [number, number]) => t >= range[0] - 1 && t <= range[1] + 1 + return ( +
+
+ + {on(INTRO) && } + {on(PANES) && } + {on(EDGES) && } + {on(STATE) && } + {on(AGENT) && } + {on(TUNE) && } + {on(END) && } + {/* a blink across the turn into daylight, so the page does not jump from one theme to the other */} +
+
+
+ ) +}