`, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter

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\n {rhythm.name}\n

\n {rhythm.locked\n ? (\n \n 🔒 Pro\n \n )\n : (\n \n Free\n \n )}\n

\n {rhythm.rate} · {rhythm.regularity}\n

\n {!rhythm.locked &&

{rhythm.summary}

}\n \n );\n}\n","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport type { WaveformSpec } from \"../../backend/rhythms-data.ts\";\n\nexport interface RhythmSummary {\n id: string;\n name: string;\n category: string;\n free: boolean;\n locked: boolean;\n sortOrder: number;\n rate: string;\n regularity: string;\n summary: string;\n questionCount: number;\n waveform: WaveformSpec;\n}\n\nexport function RhythmCard(\n { rhythm, onSelect }: { rhythm: RhythmSummary; onSelect: (id: string) => void },\n) {\n return (\n onSelect(rhythm.id)}\n class={`text-left w-full rounded-lg border p-4 transition hover:shadow-md focus:outline-none focus:ring-2 focus:ring-sky-500 ${\n rhythm.locked\n ? \"bg-slate-50 border-slate-200\"\n : \"bg-white border-slate-200 hover:border-sky-300\"\n }`}\n >\n

\n {rhythm.name}\n

\n {rhythm.locked\n ? (\n \n 🔒 Pro\n \n )\n : (\n \n Free\n \n )}\n

\n {rhythm.rate} · {rhythm.regularity}\n

\n {!rhythm.locked &&

{rhythm.summary}

}\n \n );\n}\n","createdAt",["D",1788372422640],"branchVersion","branchId","7029bff5-bb8a-442e-a4f2-805f0156bd56","id","4a26e4ff-5701-4f0e-a2d1-9b438dea196d","ekg-rhythm-practice",["D",1788371332863],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","EKG rhythm interpretation practice app for nursing/EMS students","imageUrl","f88a0ee3-b2a2-4b50-b1cd-d6ef9333f8b4","pinnedFileId","01a0633c-efa7-770e-92de-fcbd716f9193","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a0633a-cac3-709b-a980-c6cbc53d1693","tursoName","4a26e4ff57014f0ea2d19b438dea196d","tursoHostname","4a26e4ff57014f0ea2d19b438dea196d-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789500689328],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_101":100,"_109":105},"org",{"_101":100,"_102":103,"_104":105,"_18":56,"_106":107,"_108":25},"branch",{"_13":90,"_32":91,"_44":43,"_92":45,"_93":-5,"_94":-5,"_95":-5,"_96":-5,"_97":-5,"_98":46,"_99":100},"isOwned",55,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","dusty_medic","handle","displayName","Peter Sulzinski","avatar","https://lh3.googleusercontent.com/a/ACg8ocKxS7SIQL-2xeZae3OPJraIhveBUDOK84i99c574FL5C5flzw=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_44":45,"_32":46,"_39":319,"_48":-5,"_49":25,"_50":51,"_52":51,"_53":54,"_55":-5,"_18":56,"_57":58,"_59":60,"_61":-5,"_62":-5,"_63":64,"_65":66,"_67":68,"_69":70,"_71":320,"_73":-5,"_74":75,"_76":75,"_77":78,"_79":78,"_80":78,"_81":75,"_82":75,"_83":321,"_85":322,"_87":323,"_89":25},"tree",[182,184,198,199,200],"files",[182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200],"counts",{"_172":64,"_173":143,"_174":64,"_175":176,"_177":178},"contents",[132,133,134,135,136],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_44":166,"_32":167,"_30":168,"_139":-5,"_42":43,"_41":169,"_141":60,"_39":170,"_13":64,"_34":164,"_36":-5,"_24":25,"_146":-5,"_27":171},{"_44":160,"_32":161,"_30":162,"_139":-5,"_42":43,"_41":143,"_141":60,"_39":163,"_13":64,"_34":164,"_36":-5,"_24":25,"_146":-5,"_27":165},{"_44":154,"_32":155,"_30":156,"_139":-5,"_42":43,"_41":143,"_141":60,"_39":157,"_13":64,"_34":20,"_36":158,"_24":25,"_146":-5,"_27":159},{"_44":148,"_32":149,"_30":150,"_139":-5,"_42":43,"_41":143,"_141":60,"_39":151,"_13":64,"_34":20,"_36":152,"_24":25,"_146":-5,"_27":153},{"_44":137,"_32":138,"_30":58,"_139":-5,"_42":43,"_41":140,"_141":25,"_39":142,"_13":143,"_34":144,"_36":145,"_24":25,"_146":-5,"_27":147},"2a3bb751-e5fe-4f8c-83a9-856f8f9551e0","index.ts","parentId",3,"latest",["D",1788371714109],1,"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { RHYTHMS } from \"./backend/rhythms-data.ts\";\n\nconst app = new Hono();\n\n// Serve the (never-cached) HTML shell at the root /\napp.get(\"/\", (c) => c.html(Root()));\n\n// Serve frontend files at the version-addressed URLs Root() stamps, cached immutably\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\n\n// View source redirect\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n// List all rhythms (summary only — no questions in the payload)\napp.get(\"/api/rhythms\", (c) => {\n const list = [...RHYTHMS]\n .sort((a, b) => a.sortOrder - b.sortOrder)\n .map(({ questions, ...summary }) => ({\n ...summary,\n locked: !summary.free,\n questionCount: questions.length,\n }));\n return c.json(list);\n});\n\n// Single rhythm detail. Questions are only included for free rhythms —\n// Pro-gated rhythms return everything except the quiz content itself.\napp.get(\"/api/rhythms/:id\", (c) => {\n const rhythm = RHYTHMS.find((r) => r.id === c.req.param(\"id\"));\n if (!rhythm) return c.json({ error: \"not found\" }, 404);\n const locked = !rhythm.free;\n return c.json({\n ...rhythm,\n locked,\n questions: locked ? [] : rhythm.questions,\n });\n});\n\n// Unwrap and rethrow Hono errors as the original error\n// If you delete this, all errors will be \"Internal Server Error\"\napp.onError((err) => Promise.reject(err));\n\n// HTTP vals expect an exported \"fetch handler\"\n// This is how you \"run the server\" in Val Town with Hono\nexport default app.fetch;\n","label",[138],"f174df99-6739-437c-b218-528fe54153d7","README.md","01a0633c-efa7-770e-92de-f8c87a88692d",["D",1788371332863],"# React + Hono Starter\n\nA minimal starter template for building client-side React apps with a Hono\nbackend on Val Town. Click **Remix** to get your own copy.\n\n## Picking a starter\n\n| Starter | When to pick it |\n| --- | --- |\n| [`basic-html-starter`](https://www.val.town/x/templates/basic-html-starter) | Static HTML pages. Sprinkle of vanilla JS. No server-side rendering. |\n| [`hono-jsx-starter`](https://www.val.town/x/templates/hono-jsx-starter) | Dynamic server-rendered HTML with JSX. API routes. No React, no SPA. |\n| **[`react-hono-starter`](https://www.val.town/x/templates/react-hono-starter)** *(you're here)* | Client-side React SPA with a Hono API backend. |\n\n**Want to build UI?** Start writing React components in\n[`frontend/components/`](/frontend/components/). Import them into `App.tsx` and\nyou're good to go. Styling is [Twind](https://twind.style/) — just use Tailwind\nutility classes, zero config.\n\n**Want to add an API?** Add routes in [`index.ts`](/index.ts) (there's a\ncommented-out example). Fetch them from your React components.\n\n## Architecture\n\n```mermaid\ngraph LR\n Browser -->|\"GET /\"| Hono[\"index.ts
(Hono server)\"]\n Hono -->|serves| HTML[\"root.tsx\"]\n HTML -->|loads| Entry[\"index.tsx\"]\n Entry -->|renders| App[\"App.tsx\"]\n App -->|renders| Counter[\"Counter.tsx\"]\n```\n\n## File structure\n\n```\nindex.ts ← Hono backend (serves frontend + API routes)\nfrontend/\n root.tsx ← HTML shell (stamps immutable asset URLs)\n index.tsx ← React entrypoint (mounts )\n favicon.svg ← App icon\n components/\n App.tsx ← Root component (layout + view source link)\n Counter.tsx ← Example component with state\n```\n\n## How it works\n\n1. **`index.ts`** is the HTTP entrypoint — a Hono server that serves the\n frontend and any API routes you add.\n2. **`frontend/root.tsx`** is the HTML shell — it loads Twind and stamps\n immutable asset URLs for the favicon and React entrypoint.\n3. **`frontend/index.tsx`** mounts the React app.\n4. **`frontend/components/App.tsx`** is the root layout — add new components\n alongside it.\n5. **`frontend/components/Counter.tsx`** is an example stateful component —\n replace it with your own!\n\n## Next steps\n\n- Add API routes in `index.ts`\n- Add new components in `frontend/components/`\n- Add a SQLite database — see the\n [React Hono Example](https://www.val.town/x/stevekrouse/reactHonoExample) for\n a full-stack example with database, queries, and shared types\n\nTemplate updates and upgrade paths for existing remixes: [CHANGELOG.md](/CHANGELOG.md)\n",[149],"4d03780d-716e-4f3b-9cdf-f3d72852a379","CHANGELOG.md","01a0633c-efa7-770e-92de-f742abd282c5",["D",1788371332863],"# Changelog\n\n## 2026-07-30 — Immutable asset caching\n\nFrontend files are now served at version-addressed URLs\n(`/__immutable/45/frontend/index.tsx`) with\n`Cache-Control: public, max-age=31536000, immutable`, so repeat visits load the\nwhole client graph from the browser cache — roughly 3× faster (~665ms → ~157ms\nmeasured). Publishing your val bumps its version, which changes every URL, so\ncaches invalidate automatically. Old-version URLs return 404 after a publish\n(like Next.js build assets); a reload picks up the new version.\n\nWhat changed in the template:\n\n- `frontend/index.html` → [`frontend/root.tsx`](/frontend/root.tsx): the HTML\n shell is now JSX and stamps asset URLs with `immutableFileUrl()`\n- [`index.ts`](/index.ts): serves `Root()` at `/`, and one\n `app.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path))` route\n serves all frontend files\n\n### Upgrading an existing remix\n\nYour copy of this template doesn't update automatically. Two options:\n\n**Minimal (most of the benefit):** point both routes at `serveImmutableFile` —\nyour existing bare URLs redirect into versioned space, the new route serves\nthem, and the whole module graph gets cached (costs one redirect per page view):\n\n```ts\nimport { serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\n\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/frontend/**/*\", (c) => serveImmutableFile(c.req.path)); // was serveFile\n```\n\n**Full upgrade (also removes the redirect):** three self-contained steps —\nno other files needed. Adjust the ``, favicon, and body of `Root()` to\nmatch your app's existing `index.html`, and stamp anything else your shell\nreferences directly (images, css) with `immutableFileUrl()`.\n\n1. Create `frontend/root.tsx`:\n\n```tsx\n/** @jsxImportSource npm:hono@4/jsx */\nimport { raw } from \"npm:hono@4/html\";\nimport { immutableFileUrl } from \"https://esm.town/v/std/utils/index.ts\";\n\n// The HTML shell for the app. It is never cached, so immutableFileUrl can stamp\n// the current val version into each asset URL — the browser caches those\n// immutably, and publishing the val changes the URLs, refetching exactly once.\nexport function Root() {\n return (\n <>\n {raw(\"<!DOCTYPE html>\")}\n <html lang=\"en\">\n <head>\n <meta charSet=\"UTF-8\" />\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <title>React Hono Val Town Starter\n

Diff · v15