`, 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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No SDK — just fetch, so there's\n// nothing to keep in sync with npm releases.\n//\n// Lifecycle: submit() → getStatus() (poll) → getResult()\n// Docs: https://fal.ai/docs/documentation/model-apis/inference/queue\n\nconst QUEUE_BASE = \"https://queue.fal.run\";\n\n/** fal keys are per-account. Read at call time so a missing key is a clear error. */\nexport function falKey(): string | undefined {\n return Deno.env.get(\"FAL_KEY\") ?? undefined;\n}\n\nexport function falConfigured(): boolean {\n return Boolean(falKey());\n}\n\nfunction authHeaders(): HeadersInit {\n const key = falKey();\n if (!key) {\n throw new Error(\n \"FAL_KEY is not set on this val. Add it, then reload the page.\",\n );\n }\n return {\n Authorization: `Key ${key}`,\n \"Content-Type\": \"application/json\",\n };\n}\n\nexport type SubmitResult = {\n request_id: string;\n status_url: string;\n response_url: string;\n cancel_url?: string;\n queue_position?: number;\n};\n\nexport type QueueStatus = {\n status: \"IN_QUEUE\" | \"IN_PROGRESS\" | \"COMPLETED\";\n queue_position?: number;\n logs?: { message: string }[];\n metrics?: { inference_time?: number };\n error?: string;\n error_type?: string;\n};\n\n/** Send a request to the queue. Returns immediately — the work happens async. */\nexport async function submit(\n modelId: string,\n input: Record,\n): Promise {\n const res = await fetch(`${QUEUE_BASE}/${modelId}`, {\n method: \"POST\",\n headers: authHeaders(),\n body: JSON.stringify(input),\n });\n\n const text = await res.text();\n if (!res.ok) {\n throw new Error(`fal submit failed (${res.status}): ${trim(text)}`);\n }\n\n try {\n return JSON.parse(text) as SubmitResult;\n } catch {\n throw new Error(`fal submit returned non-JSON: ${trim(text)}`);\n }\n}\n\n/** Poll the status URL fal handed back at submit time. */\nexport async function getStatus(statusUrl: string): Promise {\n const res = await fetch(`${statusUrl}?logs=1`, { headers: authHeaders() });\n const text = await res.text();\n\n if (!res.ok) {\n throw new Error(`fal status failed (${res.status}): ${trim(text)}`);\n }\n return JSON.parse(text) as QueueStatus;\n}\n\n/** Fetch the finished payload. Only meaningful once status is COMPLETED. */\nexport async function getResult(\n responseUrl: string,\n): Promise> {\n const res = await fetch(responseUrl, { headers: authHeaders() });\n const text = await res.text();\n\n if (!res.ok) {\n throw new Error(`fal result failed (${res.status}): ${trim(text)}`);\n }\n return JSON.parse(text) as Record;\n}\n\n/**\n * Pull the media URL out of a model's response payload.\n *\n * `path` is the dot-path from the catalog (e.g. \"images.0.url\"). Model schemas\n * drift, so if the path misses we fall back to walking the whole payload for\n * the first http(s) URL that looks like the right media type. Better to show a\n * slightly-wrong asset than a broken card.\n */\nexport function extractMediaUrl(\n payload: unknown,\n path: string,\n modality: \"image\" | \"video\" | \"audio\",\n): string | null {\n const direct = readPath(payload, path);\n if (typeof direct === \"string\" && isHttp(direct)) return direct;\n\n const wanted = MEDIA_EXTENSIONS[modality];\n const candidates: string[] = [];\n collectStrings(payload, candidates);\n\n // Prefer a URL whose extension matches the modality, then any http URL.\n const byExtension = candidates.find((u) =>\n wanted.some((ext) => u.toLowerCase().includes(ext)),\n );\n if (byExtension) return byExtension;\n\n return candidates.find(isHttp) ?? null;\n}\n\nconst MEDIA_EXTENSIONS: Record = {\n image: [\".png\", \".jpg\", \".jpeg\", \".webp\", \".gif\", \".avif\"],\n video: [\".mp4\", \".webm\", \".mov\"],\n audio: [\".mp3\", \".wav\", \".m4a\", \".ogg\", \".opus\"],\n};\n\nfunction isHttp(v: string): boolean {\n return v.startsWith(\"http://\") || v.startsWith(\"https://\");\n}\n\nfunction readPath(obj: unknown, path: string): unknown {\n let cur: unknown = obj;\n for (const key of path.split(\".\")) {\n if (cur === null || cur === undefined) return undefined;\n if (Array.isArray(cur)) {\n cur = cur[Number(key)];\n } else if (typeof cur === \"object\") {\n cur = (cur as Record)[key];\n } else {\n return undefined;\n }\n }\n return cur;\n}\n\nfunction collectStrings(node: unknown, out: string[], depth = 0): void {\n if (depth > 6 || out.length > 200) return;\n if (typeof node === \"string\") {\n if (isHttp(node)) out.push(node);\n return;\n }\n if (Array.isArray(node)) {\n for (const item of node) collectStrings(item, out, depth + 1);\n return;\n }\n if (node && typeof node === \"object\") {\n for (const value of Object.values(node)) {\n collectStrings(value, out, depth + 1);\n }\n }\n}\n\n/** Keep error messages short enough to render in the UI. */\nfunction trim(s: string, max = 400): string {\n return s.length > max ? `${s.slice(0, max)}…` : s;\n}","createdAt",["D",1789572940131],"branchVersion","branchId","5659524a-415a-4634-89d5-e97fabee9dad","id","9d13aa12-d771-4e42-a8aa-33676d4852dc","ai-creative-studio",["D",1789572871721],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Generate images, video and audio from a prompt","imageUrl","c6f5037f-1586-4b70-8412-cc86b891d03e","pinnedFileId","01a0aada-f650-726c-8e46-8ec8db0c6ebd","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a0aa85-bc29-728f-b440-3fa04bc3896e","tursoName","9d13aa12d7714e42a8aa33676d4852dc","tursoHostname","9d13aa12d7714e42a8aa33676d4852dc-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789573271003],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_104":103,"_111":106},"org",{"_104":103,"_105":106,"_107":106,"_19":59,"_108":109,"_110":30},"branch",{"_13":93,"_37":94,"_47":46,"_95":48,"_96":-5,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":49,"_102":103},"isOwned",18,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","mansurkurtaran51","handle","displayName","","avatar","tier","free","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_47":48,"_37":49,"_42":256,"_51":-5,"_52":30,"_53":54,"_55":54,"_56":57,"_58":-5,"_19":59,"_60":61,"_62":63,"_64":-5,"_65":-5,"_66":67,"_68":69,"_70":71,"_72":73,"_74":257,"_76":-5,"_77":78,"_79":78,"_80":81,"_82":81,"_83":81,"_84":78,"_85":78,"_86":258,"_88":259,"_90":260,"_92":30},"tree",[179,187,188,189,190],"files",[179,180,181,182,183,184,185,186,187,188,189,190],"counts",{"_169":67,"_170":141,"_171":67,"_172":173,"_174":175},"contents",[133,134,135,136,137],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_47":163,"_37":164,"_35":165,"_140":-5,"_45":46,"_44":141,"_142":63,"_42":166,"_13":67,"_38":167,"_40":-5,"_29":30,"_146":-5,"_32":168},{"_47":157,"_37":158,"_35":159,"_140":-5,"_45":46,"_44":141,"_142":63,"_42":160,"_13":67,"_38":26,"_40":161,"_29":30,"_146":-5,"_32":162},{"_47":151,"_37":152,"_35":153,"_140":-5,"_45":46,"_44":141,"_142":63,"_42":154,"_13":67,"_38":26,"_40":155,"_29":30,"_146":-5,"_32":156},{"_47":148,"_37":33,"_35":36,"_140":-5,"_45":46,"_44":14,"_142":63,"_42":149,"_13":67,"_38":39,"_40":41,"_29":30,"_146":-5,"_32":150},{"_47":138,"_37":139,"_35":61,"_140":-5,"_45":46,"_44":141,"_142":30,"_42":143,"_13":67,"_38":144,"_40":145,"_29":30,"_146":-5,"_32":147},"5c90d9be-0238-4d38-82a8-bbdb0edc1c0c","index.ts","parentId",1,"latest",["D",1789572871721],"http","import { parseVal, serveImmutableFile } from \"https://esm.town/v/std/utils/index.ts\";\nimport { Hono } from \"npm:hono\";\nimport { Root } from \"./frontend/root.tsx\";\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// Add your API routes here\n// app.get(\"/api/data\", c => c.json({ hello: \"world\" }));\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",[139],"d916a802-b42d-4eca-b71d-1478834777d8",["D",1789572940131],[33],"0549a5ae-6fc8-45b7-832c-817407dd4c24","README.md","01a0aada-f650-726c-8e46-8bf61b6a12f9",["D",1789572871721],"# 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",[152],"0416b9da-c795-4e53-a751-9cacd64df493","CHANGELOG.md","01a0aada-f650-726c-8e46-873bd723a0ba",["D",1789572871721],"# 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

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