`, 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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(v as Person) : null;\n } catch {\n return null;\n }\n}\n\nexport function saveMe(p: Person) {\n try {\n localStorage.setItem(STORAGE_KEY, p);\n } catch {\n // private mode — the choice just won't be remembered\n }\n}\n\n// Polish past tense: \"kupił\" → \"kupiła\" for Aga\nexport const past = (who: Person, verb: string) => (who === \"Aga\" ? `${verb}a` : verb);\n","createdAt",["D",1789331687019],"branchVersion","branchId","2b7f7d5b-efff-44e5-9962-373315ac0749","id","f99be336-a8c3-4900-9595-c5bea7024466","lista-zakupow",["D",1789331428995],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","Wspólna lista zakupów Agi i Dominika (mobile)","imageUrl","5dd5cdfa-b36a-42e1-a911-81ba86e3b64c","pinnedFileId","01a09c76-d795-72a1-be82-f37a11bb083f","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a09aab-d118-725d-b44f-c12d328bfdc6","tursoName","f99be336a8c349009595c5bea7024466","tursoHostname","f99be336a8c349009595c5bea7024466-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789504321592],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_99":98,"_107":103},"org",{"_99":98,"_100":101,"_102":103,"_18":54,"_104":105,"_106":24},"branch",{"_13":88,"_31":89,"_42":41,"_90":43,"_91":-5,"_92":-5,"_93":-5,"_94":-5,"_95":-5,"_96":44,"_97":98},"isOwned",27,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","dominik1","handle","displayName","Dominik","avatar","","tier","free","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_42":43,"_31":44,"_37":287,"_46":-5,"_47":24,"_48":49,"_50":49,"_51":52,"_53":-5,"_18":54,"_55":56,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68,"_69":288,"_71":-5,"_72":73,"_74":73,"_75":76,"_77":76,"_78":76,"_79":73,"_80":73,"_81":289,"_83":290,"_85":291,"_87":24},"tree",[186,188,197,199,200,201],"files",[186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201],"counts",{"_175":62,"_176":160,"_177":62,"_178":179,"_180":181},"contents",[129,130,131,132,133,134],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_42":169,"_31":170,"_29":171,"_137":-5,"_40":41,"_39":172,"_139":58,"_37":173,"_13":62,"_33":162,"_35":-5,"_23":24,"_143":-5,"_26":174},{"_42":164,"_31":165,"_29":166,"_137":-5,"_40":41,"_39":138,"_139":58,"_37":167,"_13":62,"_33":162,"_35":-5,"_23":24,"_143":-5,"_26":168},{"_42":157,"_31":158,"_29":159,"_137":-5,"_40":41,"_39":160,"_139":58,"_37":161,"_13":62,"_33":162,"_35":-5,"_23":24,"_143":-5,"_26":163},{"_42":151,"_31":152,"_29":153,"_137":-5,"_40":41,"_39":138,"_139":58,"_37":154,"_13":62,"_33":20,"_35":155,"_23":24,"_143":-5,"_26":156},{"_42":145,"_31":146,"_29":147,"_137":-5,"_40":41,"_39":138,"_139":24,"_37":148,"_13":62,"_33":20,"_35":149,"_23":24,"_143":-5,"_26":150},{"_42":135,"_31":136,"_29":56,"_137":-5,"_40":41,"_39":138,"_139":24,"_37":140,"_13":62,"_33":141,"_35":142,"_23":24,"_143":-5,"_26":144},"1500f2ee-376e-43c6-9ee7-ce82c8a7a3fc","index.ts","parentId",1,"latest",["D",1789331428995],"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",[136],"68fa252f-2072-441b-b60b-b34199ba3d65","README.md","01a09c76-d794-7474-b4e3-6ff2da2d6b8a",["D",1789331428995],"# 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",[146],"8dcda787-8b81-4f00-856a-887038e54765","CHANGELOG.md","01a09c76-d794-7474-b4e3-6a43e57cbd5c",["D",1789331428995],"# 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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