`, 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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Data updates automatically as games start and finish.\n\nexport interface NFLTeam {\n id: string;\n abbr: string;\n displayName: string;\n logo: string;\n}\n\nexport interface NFLGame {\n id: string;\n status: \"pre\" | \"in\" | \"post\";\n completed: boolean;\n date: string;\n shortName: string;\n week: number;\n home: NFLTeam;\n away: NFLTeam;\n homeScore?: number;\n awayScore?: number;\n /** Home team's spread line. Negative = home team is favored. Null = no line. */\n spread: number | null;\n /** Human label for the spread, e.g. \"SEA -3\". */\n spreadLabel: string | null;\n overUnder: number | null;\n /** American odds for home team to win outright, e.g. -170. Null = no line. */\n homeMoneyline: number | null;\n /** American odds for away team to win outright, e.g. +142. Null = no line. */\n awayMoneyline: number | null;\n broadcast: string | null;\n venue: string | null;\n}\n\nconst SCOREBOARD_URL = \"https://site.api.espn.com/apis/site/v2/sports/football/nfl/scoreboard\";\n\n/** Parse an American odds string like \"-170\" or \"+142\" into a number. Returns null if missing/invalid. */\nfunction parseAmericanOdds(val: unknown): number | null {\n if (typeof val !== \"string\") return null;\n const n = parseInt(val, 10);\n return Number.isFinite(n) ? n : null;\n}\n\n/** Convert American odds to a decimal betting multiplier (stake * decimal = total return). */\nexport function americanToDecimal(american: number): number {\n if (american > 0) return 1 + american / 100;\n return 1 + 100 / -american;\n}\n\n/** Fetch the current week's NFL games from ESPN. Throws on network failure. */\nexport async function fetchGames(): Promise {\n const res = await fetch(SCOREBOARD_URL, {\n headers: { \"User-Agent\": \"ValTown/nfl-betting-app\" },\n });\n if (!res.ok) throw new Error(`ESPN request failed: ${res.status} ${res.statusText}`);\n const data = await res.json();\n\n const week = data.week?.number;\n const events: any[] = data.events ?? [];\n\n return events.map((e) => {\n const comp = e.competitions?.[0] ?? {};\n const competitors = comp.competitors ?? [];\n const homeC = competitors.find((c: any) => c.homeAway === \"home\");\n const awayC = competitors.find((c: any) => c.homeAway === \"away\");\n\n const homeT = homeC?.team ?? {};\n const awayT = awayC?.team ?? {};\n\n const odds = comp.odds?.[0] ?? {};\n const spread = typeof odds.spread === \"number\" ? odds.spread : null;\n const overUnder = typeof odds.overUnder === \"number\" ? odds.overUnder : null;\n const homeML = parseAmericanOdds(odds.moneyline?.home?.close?.odds ?? odds.moneyline?.home?.open?.odds);\n const awayML = parseAmericanOdds(odds.moneyline?.away?.close?.odds ?? odds.moneyline?.away?.open?.odds);\n\n const status = comp.status?.type?.state ?? \"pre\";\n const state = status === \"pre\" || status === \"in\" || status === \"post\" ? status : \"pre\";\n const completed = !!comp.status?.type?.completed;\n\n let spreadLabel: string | null = null;\n if (typeof odds.details === \"string\" && odds.details.length > 0) {\n spreadLabel = odds.details;\n } else if (spread !== null && homeT.abbreviation) {\n spreadLabel = `${homeT.abbreviation} ${spread > 0 ? \"+\" : \"\"}${spread}`;\n }\n\n return {\n id: e.id,\n status: state,\n completed,\n date: e.date,\n shortName: e.shortName ?? e.name,\n week,\n home: { id: homeT.id, abbr: homeT.abbreviation, displayName: homeT.displayName, logo: homeT.logo },\n away: { id: awayT.id, abbr: awayT.abbreviation, displayName: awayT.displayName, logo: awayT.logo },\n homeScore: homeC?.score != null ? Number(homeC.score) : undefined,\n awayScore: awayC?.score != null ? Number(awayC.score) : undefined,\n spread,\n spreadLabel,\n overUnder,\n homeMoneyline: homeML,\n awayMoneyline: awayML,\n broadcast: comp.broadcasts?.[0]?.names?.[0] ?? null,\n venue: comp.venue?.fullName ?? null,\n };\n });\n}\n","createdAt",["D",1788918863786],"branchVersion","branchId","8ec703c1-dca2-4457-930c-483e75a3ce83","id","bd982b4e-7d01-4dd7-b746-c1f70fbfa9e8","nfl-betting-app",["D",1788918736700],"deletedAt","legacyEnvVars",false,"privacy","public","httpPrivacy","description","NFL pick'em & simulated bankroll betting app with real ESPN data","imageUrl","f9e3ca71-3efe-459f-8238-02505cd1e34e","pinnedFileId","01a083dd-a784-740f-ad04-36397e47d99f","pinPreview","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",{"_106":105,"_114":110},"org",{"_106":105,"_107":108,"_109":110,"_19":62,"_111":112,"_113":55},"branch",{"_13":95,"_38":96,"_49":48,"_97":50,"_98":-5,"_99":-5,"_100":-5,"_101":-5,"_102":-5,"_103":51,"_104":105},"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":273,"_53":-5,"_54":55,"_56":57,"_58":57,"_59":60,"_61":-5,"_19":62,"_63":64,"_65":31,"_66":-5,"_67":-5,"_68":69,"_70":71,"_72":73,"_74":75,"_76":274,"_78":-5,"_79":80,"_81":80,"_82":83,"_84":83,"_85":83,"_86":80,"_87":80,"_88":275,"_90":276,"_92":277,"_94":55},"tree",[187,194,197,198,199],"files",[187,188,189,190,191,192,193,194,195,196,197,198,199],"counts",{"_177":69,"_178":148,"_179":69,"_180":181,"_182":183},"contents",[137,138,139,140,141],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_49":172,"_38":173,"_36":174,"_144":-5,"_47":48,"_46":148,"_146":31,"_44":175,"_13":69,"_40":170,"_42":-5,"_30":55,"_151":-5,"_33":176},{"_49":165,"_38":166,"_36":167,"_144":-5,"_47":48,"_46":168,"_146":31,"_44":169,"_13":69,"_40":170,"_42":-5,"_30":55,"_151":-5,"_33":171},{"_49":159,"_38":160,"_36":161,"_144":-5,"_47":48,"_46":148,"_146":31,"_44":162,"_13":69,"_40":26,"_42":163,"_30":55,"_151":-5,"_33":164},{"_49":153,"_38":154,"_36":155,"_144":-5,"_47":48,"_46":148,"_146":55,"_44":156,"_13":69,"_40":26,"_42":157,"_30":55,"_151":-5,"_33":158},{"_49":142,"_38":143,"_36":64,"_144":-5,"_47":48,"_46":145,"_146":55,"_44":147,"_13":148,"_40":149,"_42":150,"_30":55,"_151":-5,"_33":152},"8da04fda-ab9a-42be-9883-abd754590d59","index.ts","parentId",4,"latest",["D",1788918814586],1,"http","// NFL Betting App — Hono backend.\n// Serves the React frontend + a JSON API backed by live ESPN data 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 { fetchGames, americanToDecimal } from \"./lib/espn.ts\";\nimport {\n getBankroll,\n getStartingBankroll,\n getBetsForGame,\n getAllBets,\n placeBet,\n resetBankroll,\n settleBets,\n getRecord,\n} 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: settle finished games, then return games with any user bets attached. */\napp.get(\"/api/games\", async (c) => {\n const games = await fetchGames();\n // Settle open bets against this slate (this also credits the bankroll).\n await settleBets(games);\n\n const gameIds = new Set(games.map((g) => g.id));\n const betMap = new Map();\n for (const id of gameIds) {\n betMap.set(id, await getBetsForGame(id));\n }\n\n return c.json({\n week: games[0]?.week ?? null,\n games: games.map((g) => ({ ...g, bets: betMap.get(g.id) ?? [] })),\n bankroll: await getBankroll(),\n startingBankroll: await getStartingBankroll(),\n record: await getRecord(),\n });\n});\n\n/** Bet history + current state. */\napp.get(\"/api/history\", async (c) => {\n return c.json({\n bets: await getAllBets(),\n bankroll: await getBankroll(),\n startingBankroll: await getStartingBankroll(),\n record: await getRecord(),\n });\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 games = await fetchGames();\n const game = games.find((g) => g.id === 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 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 ? \"+\" : \"\"}${american})`;\n decimalOdds = americanToDecimal(american);\n } else if (betType === \"spread\") {\n if (side !== \"home\" && side !== \"away\") return c.json({ error: \"Spread needs side 'home' or 'away'.\" }, 400);\n if (game.spread == null) return c.json({ error: \"No spread available for that game yet.\" }, 400);\n const lineForSide = side === \"home\" ? game.spread : -game.spread;\n const abbr = game[side].abbr;\n pickLabel = `${abbr} ${lineForSide > 0 ? \"+\" : \"\"}${lineForSide}`;\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 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.shortName,\n betType,\n side,\n pickLabel,\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","label",[143],"efdfaba0-c6af-4d48-a312-df84549ba003","README.md","01a083dd-a784-740f-ad04-33a510c07238",["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",[154],"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 · v6