`, 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",{"_259":260,"_261":262},"routes/_app.x.$handle.$name",{"_105":104,"_37":50,"_113":95,"_32":107,"_13":14,"_114":-5,"_11":115,"_116":117,"_118":119,"_120":121,"_122":123,"_26":-5,"_124":-5,"_125":-5,"_126":30,"_127":128,"_129":64,"_130":-5,"_131":-5,"_132":133},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":18,"_19":-5},"project",{"_48":49,"_37":50,"_43":51,"_52":-5,"_53":30,"_54":55,"_56":55,"_57":58,"_59":-5,"_19":60,"_61":62,"_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":30},"version",3,"changes",[25],"aiChatInfo",{"_20":21,"_22":-5,"_23":-5,"_24":-5},"userId","aiChatMessageId","70ffee00-8cd2-4b21-bae3-88b8084768dd","aiChatThreadId","aiChatThreadUserId","aiChatThreadTitle",{"_26":27,"_28":-7,"_29":30,"_31":30,"_32":33,"_34":33},"file",{"_35":36,"_37":38,"_39":40,"_41":42,"_43":44,"_45":14,"_46":47,"_29":30},"previous","deleted",false,"deletedHere","path","frontend/components/Login3D.tsx","latestPath","fileId","4d7d0fc8-a38a-11f1-bd30-1607ee4eb77e","name","Login3D.tsx","fileType","script","content","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useState, useRef, useCallback } from \"https://esm.sh/react@18.2.0\";\n\nfunction Cube({ ghost = false }: { ghost?: boolean }) {\n return (\n

\n );\n}\n\nfunction Sparks() {\n const sparks = Array.from({ length: 14 }, (_, i) => ({\n left: `${(i * 7 + 5) % 100}%`,\n size: 3 + ((i * 5) % 5),\n duration: 8 + ((i * 3) % 7),\n delay: (i * 1.3) % 9,\n }));\n return (\n <>\n {sparks.map((s, i) => (\n \n ))}\n \n );\n}\n\nexport function Login3D() {\n const [email, setEmail] = useState(\"\");\n const [password, setPassword] = useState(\"\");\n const [status, setStatus] = useState(null);\n const tiltRef = useRef(null);\n\n const onMove = useCallback((e: React.MouseEvent) => {\n const el = tiltRef.current;\n if (!el) return;\n const rect = el.getBoundingClientRect();\n const px = (e.clientX - rect.left) / rect.width - 0.5;\n const py = (e.clientY - rect.top) / rect.height - 0.5;\n el.style.transform = `rotateY(${px * 16}deg) rotateX(${-py * 16}deg)`;\n }, []);\n\n const onLeave = useCallback(() => {\n const el = tiltRef.current;\n if (el) el.style.transform = \"rotateY(0deg) rotateX(0deg)\";\n }, []);\n\n const submit = async (e: React.FormEvent) => {\n e.preventDefault();\n setStatus(\"Signing in…\");\n try {\n const res = await fetch(\"/api/login\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/json\" },\n body: JSON.stringify({ email, password }),\n });\n const data = await res.json();\n setStatus(res.ok ? `✅ ${data.message}` : `❌ ${data.error}`);\n } catch {\n setStatus(\"❌ Network error\");\n }\n };\n\n return (\n

\n \n \n \n

\n );\n}\n","createdAt",["D",1787994982596],"branchVersion","branchId","536ab360-a46b-449e-a9f4-1079bdfab187","id","f85a6344-05f7-451e-a86e-5a28ccb4a8c8","login-3d",["D",1787994939443],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","3D animated login page built with React and CSS 3D transforms","imageUrl","97cbaf9e-5f11-428e-8843-b94b38a4b5db","pinnedFileId","01a04ccd-a074-777d-91f8-14283ff3583e","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a04cbf-2cd8-76ef-8a1b-a12fa8b73d00","tursoName","f85a634405f7451ea86e5a28ccb4a8c8","tursoHostname","f85a634405f7451ea86e5a28ccb4a8c8-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789474853273],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_105":104,"_112":107},"org",{"_105":104,"_106":107,"_108":107,"_19":60,"_109":110,"_111":30},"branch",{"_13":94,"_37":95,"_48":47,"_96":49,"_97":-5,"_98":-5,"_99":-5,"_100":-5,"_101":-5,"_102":50,"_103":104},"isOwned",7,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","intensefreida","handle","displayName","","avatar","tier","free","canRestrictVals","profileImageUrl","branchName","adoptOrgId",{"_48":49,"_37":50,"_43":254,"_52":-5,"_53":30,"_54":55,"_56":55,"_57":58,"_59":-5,"_19":60,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":68,"_69":70,"_71":72,"_73":74,"_75":255,"_77":-5,"_78":79,"_80":79,"_81":82,"_83":82,"_84":82,"_85":79,"_86":79,"_87":256,"_89":257,"_91":258,"_93":30},"tree",[176,185,186,187],"files",[176,177,178,179,180,181,182,183,184,185,186,187],"counts",{"_166":68,"_167":141,"_168":68,"_169":170,"_171":172},"contents",[134,135,136,137],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},{"_48":160,"_37":161,"_35":162,"_140":-5,"_46":47,"_45":141,"_142":64,"_43":163,"_13":68,"_39":164,"_41":-5,"_29":30,"_146":-5,"_32":165},{"_48":154,"_37":155,"_35":156,"_140":-5,"_46":47,"_45":141,"_142":64,"_43":157,"_13":68,"_39":26,"_41":158,"_29":30,"_146":-5,"_32":159},{"_48":148,"_37":149,"_35":150,"_140":-5,"_46":47,"_45":141,"_142":64,"_43":151,"_13":68,"_39":26,"_41":152,"_29":30,"_146":-5,"_32":153},{"_48":138,"_37":139,"_35":62,"_140":-5,"_46":47,"_45":141,"_142":30,"_43":143,"_13":68,"_39":144,"_41":145,"_29":30,"_146":50,"_32":147},"1b29a297-3591-424c-b2eb-ac2d0d406ba7","index.ts","parentId",1,"latest",["D",1787994939443],"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],"2ad12647-8876-4190-940d-ad723f552603","README.md","01a04ccd-a074-777d-91f8-104d1af801f7",["D",1787994939443],"# 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],"e8d75107-6728-4532-be2d-8dd87ee66e95","CHANGELOG.md","01a04ccd-a074-777d-91f8-0caf743a9ec8",["D",1787994939443],"# 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

Welcome back

Diff · v3