`, 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

[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_320":321,"_322":323},"routes/_app.x.$handle.$name",{"_105":104,"_38":51,"_114":95,"_33":115,"_13":14,"_116":-5,"_11":117,"_118":119,"_120":121,"_122":123,"_124":125,"_26":-5,"_126":-5,"_127":-5,"_128":31,"_129":130,"_131":64,"_132":-5,"_133":-5,"_134":135},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":18,"_19":-5},"project",{"_49":50,"_38":51,"_44":52,"_53":-5,"_54":31,"_55":56,"_57":56,"_58":59,"_60":-5,"_19":61,"_62":37,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":76,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":88,"_89":90,"_91":92,"_93":31},"version",27,"changes",[25],"aiChatInfo",{"_20":21,"_22":-5,"_23":-5,"_24":-5},"userId","aiChatMessageId","533df1ad-010f-46ff-ac16-de7c2f3386f2","aiChatThreadId","aiChatThreadUserId","aiChatThreadTitle",{"_26":27,"_28":29,"_30":31,"_32":31,"_33":34,"_35":34},"file",{"_36":37,"_38":34,"_39":40,"_41":43,"_44":45,"_46":14,"_47":48,"_30":31},"previous",{"_36":37,"_38":34,"_39":40,"_41":42},"deleted",false,"deletedHere","path","index.ts","latestPath","fileId","01a083dd-a784-740f-ad04-36397e47d99f","name","fileType","http","content","// NFL Betting App — Hono backend.\n// Serves the React frontend + a JSON API backed by The Odds API and SQLite.\n\nimport { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { getState, getHistory, getGameById, americanToDecimal } from \"./lib/data.ts\";\nimport { placeBet, resetBankroll } from \"./lib/db.ts\";\n\nconst app = new Hono();\n\napp.get(\"/\", (c) => c.html(Root()));\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n/** Current slate: games + lines, user bets, bankroll, record. Settles finished games. */\napp.get(\"/api/games\", async (c) => {\n const state = await getState();\n return c.json(state);\n});\n\n/** Full bet history + current state. */\napp.get(\"/api/history\", async (c) => {\n return c.json(await getHistory());\n});\n\n/** Place a bet. Body: { gameId, betType: 'moneyline'|'spread'|'total', side, stake } */\napp.post(\"/api/bets\", async (c) => {\n const body = await c.req.json().catch(() => null);\n if (!body) return c.json({ error: \"Invalid JSON body.\" }, 400);\n\n const { gameId, betType, side, stake } = body as any;\n const game = await getGameById(gameId);\n if (!game) return c.json({ error: \"Game not found.\" }, 404);\n if (game.completed) return c.json({ error: \"That game is already finished.\" }, 400);\n\n let pickLabel: string;\n let linePoint: number | null = null;\n let decimalOdds: number;\n\n if (betType === \"moneyline\") {\n if (side !== \"home\" && side !== \"away\") return c.json({ error: \"Moneyline needs side 'home' or 'away'.\" }, 400);\n const american = side === \"home\" ? game.homeMoneyline : game.awayMoneyline;\n if (american == null) return c.json({ error: \"No moneyline available for that game yet.\" }, 400);\n pickLabel = `${game[side].abbr} ML (${american > 0 ? \"+\" : \"\"}${american})`;\n decimalOdds = americanToDecimal(american);\n } else if (betType === \"spread\") {\n if (side !== \"home\" && side !== \"away\") return c.json({ error: \"Spread needs side 'home' or 'away'.\" }, 400);\n if (game.spread == null) return c.json({ error: \"No spread available for that game yet.\" }, 400);\n const lineForSide = side === \"home\" ? game.spread : -game.spread;\n pickLabel = `${game[side].abbr} ${lineForSide > 0 ? \"+\" : \"\"}${lineForSide}`;\n linePoint = game.spread; // home-relative line, used for settlement\n decimalOdds = 2.0; // even money on the spread\n } else if (betType === \"total\") {\n if (side !== \"over\" && side !== \"under\") return c.json({ error: \"Total needs side 'over' or 'under'.\" }, 400);\n if (game.overUnder == null) return c.json({ error: \"No total available for that game yet.\" }, 400);\n pickLabel = `${side === \"over\" ? \"Over\" : \"Under\"} ${game.overUnder}`;\n linePoint = game.overUnder;\n decimalOdds = 2.0; // even money on the total\n } else {\n return c.json({ error: \"betType must be 'moneyline', 'spread', or 'total'.\" }, 400);\n }\n\n if (!Number.isFinite(Number(stake))) return c.json({ error: \"A valid stake is required.\" }, 400);\n\n try {\n const result = await placeBet({\n gameId,\n gameLabel: `${game.away.name} @ ${game.home.name}`,\n betType,\n side,\n pickLabel,\n linePoint,\n stake: Number(stake),\n decimalOdds,\n });\n return c.json(result);\n } catch (e) {\n return c.json({ error: e instanceof Error ? e.message : \"Could not place bet.\" }, 400);\n }\n});\n\n/** Reset the bankroll and clear all bets. */\napp.post(\"/api/reset\", async (c) => {\n const result = await resetBankroll();\n return c.json(result);\n});\n\napp.onError((err) => Promise.reject(err));\n\nexport default app.fetch;\n","// NFL Betting App — Hono backend.\n// Serves the React frontend + a JSON API backed by The Odds API and SQLite.\n\nimport { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\nimport { getState, getHistory, getGameById, americanToDecimal } from \"./lib/data.ts\";\nimport { placeBet, resetBankroll } from \"./lib/db.ts\";\n\nconst app = new Hono();\n\napp.get(\"/\", (c) => c.html(Root()));\napp.get(\"/__immutable/*\", (c) => serveImmutableFile(c.req.path));\napp.get(\"/source\", (c) => c.redirect(parseVal().links.self.val));\n\n/** Current slate: games + lines, user bets, bankroll, record. Settles finished games. */\napp.get(\"/api/games\", async (c) => {\n const state = await getState();\n return c.json(state);\n});\n\n/** Full bet history + current state. */\napp.get(\"/api/history\", async (c) => {\n return c.json(await getHistory());\n});\n\n/** Place a bet. Body: { gameId, betType: 'moneyline'|'spread'|'total', side, stake } */\napp.post(\"/api/bets\", async (c) => {\n const body = await c.req.json().catch(() => null);\n if (!body) return c.json({ error: \"Invalid JSON body.\" }, 400);\n\n const { gameId, betType, side, stake } = body as any;\n const game = await getGameById(gameId);\n if (!game) return c.json({ error: \"Game not found.\" }, 404);\n if (game.completed) return c.json({ error: \"That game is already finished.\" }, 400);\n\n let pickLabel: string;\n let linePoint: number | null = null;\n let decimalOdds: number;\n\n if (betType === \"moneyline\") {\n if (side !== \"home\" && side !== \"away\") return c.json({ error: \"Moneyline needs side 'home' or 'away'.\" }, 400);\n const american = side === \"home\" ? game.homeMoneyline : game.awayMoneyline;\n if (american == null) return c.json({ error: \"No moneyline available for that game yet.\" }, 400);\n pickLabel = `${game[side].abbr} ML (${american > 0 ? \"+\" : \"\"}${american})`;\n decimalOdds = americanToDecimal(american);\n } else if (betType === \"spread\") {\n if (side !== \"home\" && side !== \"away\") return c.json({ error: \"Spread needs side 'home' or 'away'.\" }, 400);\n if (game.spread == null) return c.json({ error: \"No spread available for that game yet.\" }, 400);\n const lineForSide = side === \"home\" ? game.spread : -game.spread;\n pickLabel = `${game[side].abbr} ${lineForSide > 0 ? \"+\" : \"\"}${lineForSide}`;\n linePoint = game.spread; // home-relative line, used for settlement\n decimalOdds = 2.0; // even money on the spread\n } else if (betType === \"total\") {\n if (side !== \"over\" && side !== \"under\") return c.json({ error: \"Total needs side 'over' or 'under'.\" }, 400);\n if (game.overUnder == null) return c.json({ error: \"No total available for that game yet.\" }, 400);\n pickLabel = `${side === \"over\" ? \"Over\" : \"Under\"} ${game.overUnder}`;\n linePoint = game.overUnder;\n decimalOdds = 2.0; // even money on the total\n } else {\n return c.json({ error: \"betType must be 'moneyline', 'spread', or 'total'.\" }, 400);\n }\n\n if (!Number.isFinite(Number(stake))) return c.json({ error: \"A valid stake is required.\" }, 400);\n\n try {\n const result = await placeBet({\n gameId,\n gameLabel: `${game.away.displayName} @ ${game.home.displayName}`,\n betType,\n side,\n pickLabel,\n linePoint,\n stake: Number(stake),\n decimalOdds,\n });\n return c.json(result);\n } catch (e) {\n return c.json({ error: e instanceof Error ? e.message : \"Could not place bet.\" }, 400);\n }\n});\n\n/** Reset the bankroll and clear all bets. */\napp.post(\"/api/reset\", async (c) => {\n const result = await resetBankroll();\n return c.json(result);\n});\n\napp.onError((err) => Promise.reject(err));\n\nexport default app.fetch;\n","createdAt",["D",1788919022922],"branchVersion","branchId","8ec703c1-dca2-4457-930c-483e75a3ce83","id","bd982b4e-7d01-4dd7-b746-c1f70fbfa9e8","nfl-betting-app",["D",1788918736700],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","NFL pick'em & simulated bankroll betting app with real ESPN data","imageUrl","f9e3ca71-3efe-459f-8238-02505cd1e34e","pinnedFileId","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a083da-e415-7538-8e5b-1c2e98dba80b","tursoName","bd982b4e7d014dd7b746c1f70fbfa9e8","tursoHostname","bd982b4e7d014dd7b746c1f70fbfa9e8-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789530642963],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_105":104,"_113":109},"org",{"_105":104,"_106":107,"_108":109,"_19":61,"_110":111,"_112":31},"branch",{"_13":94,"_38":95,"_49":48,"_96":50,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":-5,"_102":51,"_103":104},"isOwned",30,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","michaelfreedman","handle","displayName","Michael Freedman","avatar","https://lh3.googleusercontent.com/a/ACg8ocLNlBCcJsODlTN6IwagSlTpF8cuTaIF5s9T-KOXm8gKP1cMrQ=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_49":50,"_38":51,"_44":315,"_53":-5,"_54":31,"_55":56,"_57":56,"_58":59,"_60":-5,"_19":61,"_62":37,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":316,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":317,"_89":318,"_91":319,"_93":31},"tree",[183,195,198,199,200],"files",[183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200],"counts",{"_173":68,"_174":151,"_175":68,"_176":177,"_178":179},"contents",[136,137,138,139,140],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_49":168,"_38":169,"_36":170,"_142":-5,"_47":48,"_46":151,"_143":64,"_44":171,"_13":68,"_39":166,"_41":-5,"_30":31,"_146":-5,"_33":172},{"_49":161,"_38":162,"_36":163,"_142":-5,"_47":48,"_46":164,"_143":64,"_44":165,"_13":68,"_39":166,"_41":-5,"_30":31,"_146":-5,"_33":167},{"_49":155,"_38":156,"_36":157,"_142":-5,"_47":48,"_46":151,"_143":64,"_44":158,"_13":68,"_39":26,"_41":159,"_30":31,"_146":-5,"_33":160},{"_49":148,"_38":149,"_36":150,"_142":-5,"_47":48,"_46":151,"_143":31,"_44":152,"_13":68,"_39":26,"_41":153,"_30":31,"_146":-5,"_33":154},{"_49":141,"_38":34,"_36":37,"_142":-5,"_47":48,"_46":14,"_143":64,"_44":144,"_13":145,"_39":40,"_41":43,"_30":31,"_146":-5,"_33":147},"cc021349-db62-46d2-bcbb-52992d3557ec","parentId","latest",["D",1788919022922],4,"label",[34],"efdfaba0-c6af-4d48-a312-df84549ba003","README.md","01a083dd-a784-740f-ad04-33a510c07238",1,["D",1788918736700],"# 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],"32dab4e2-d7ca-4ee1-8925-605bff1ffb20","CHANGELOG.md","01a083dd-a784-740f-ad04-2ea34a70660d",["D",1788918736700],"# 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 · v27