`, 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",{"_255":256,"_257":258},"routes/_app.x.$handle.$name",{"_103":102,"_32":45,"_112":89,"_27":113,"_13":14,"_114":-5,"_11":115,"_116":117,"_118":119,"_120":121,"_122":123,"_20":-5,"_124":125,"_126":127,"_128":25,"_129":130,"_131":59,"_132":-5,"_133":-5,"_134":135},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_43":44,"_32":45,"_38":46,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":55,"_18":56,"_57":31,"_58":59,"_60":-5,"_61":-5,"_62":63,"_64":65,"_66":67,"_68":69,"_70":71,"_72":-5,"_73":74,"_75":74,"_76":77,"_78":77,"_79":77,"_80":74,"_81":74,"_82":83,"_84":85,"_86":87,"_88":25},"version",2,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":34,"_35":37,"_38":39,"_40":14,"_41":42,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","index.ts","latestPath","fileId","01a018de-f530-718e-86b9-4115940cd699","name","fileType","http","content","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","import { Hono } from \"npm:hono\";\n\nconst app = new Hono();\nconst ORIGIN = \"https://ahmed-tarek8.github.io\";\nconst BASE = \"/ELKEIY-EDUCATION\";\n\nfunction originUrl(requestUrl: string) {\n const incoming = new URL(requestUrl);\n let path = incoming.pathname;\n\n if (path === \"/\") {\n path = `${BASE}/`;\n } else if (!path.startsWith(`${BASE}/`) && path !== BASE) {\n path = `${BASE}${path}`;\n }\n\n return `${ORIGIN}${path}${incoming.search}`;\n}\n\napp.all(\"*\", async (c) => {\n const request = c.req.raw;\n const target = originUrl(request.url);\n\n let upstream = await fetch(target, {\n method: request.method === \"HEAD\" ? \"HEAD\" : \"GET\",\n headers: {\n \"accept\": request.headers.get(\"accept\") ?? \"*/*\",\n \"user-agent\": \"ECSE-ValTown-Mirror/1.0\",\n },\n redirect: \"follow\",\n });\n\n // GitHub Pages uses 404.html as the SPA shell. Make client-side routes\n // such as /login or /watch/... render the app instead of a plain 404.\n const accept = request.headers.get(\"accept\") ?? \"\";\n if (upstream.status === 404 && accept.includes(\"text/html\")) {\n upstream = await fetch(`${ORIGIN}${BASE}/`, {\n headers: { \"user-agent\": \"ECSE-ValTown-Mirror/1.0\" },\n });\n }\n\n const headers = new Headers(upstream.headers);\n headers.delete(\"content-security-policy\");\n headers.delete(\"content-security-policy-report-only\");\n headers.delete(\"x-frame-options\");\n headers.set(\"x-ecse-origin\", \"github-pages\");\n\n return new Response(upstream.body, {\n status: upstream.status,\n statusText: upstream.statusText,\n headers,\n });\n});\n\napp.onError((err) => Promise.reject(err));\n\nexport default app.fetch;\n","createdAt",["D",1787124358635],"branchVersion","branchId","84f75c0e-aea5-41e5-bbc5-8f7ca78a6c30","id","584e5018-7e7a-414d-bddd-43309b794c6a","ecse-epilepsy-education",["D",1787123660001],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","ECSE Epilepsy Education deployment","imageUrl","https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/64dc00cc-94d9-47dd-81b1-dde02610d900/square512?exp=1789588799&sig=cc8cae5a3b06d460bba0e0803182f7ba2bd6e8f6e4c645b92fb51aa03192ad01","c8593145-9fcb-4e34-a468-57349b3b0369","pinnedFileId","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","01a018dd-63bc-75a8-93f4-ff5f02151fd0","tursoName","584e50187e7a414dbddd43309b794c6a","tursoHostname","584e50187e7a414dbddd43309b794c6a-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789562426294],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_103":102,"_111":107},"org",{"_103":102,"_104":105,"_106":107,"_18":56,"_108":109,"_110":25},"branch",{"_13":14,"_32":89,"_43":42,"_90":44,"_91":92,"_93":94,"_95":50,"_96":97,"_98":99,"_100":45,"_101":102},"isOwned","main","projectId","forkedBranchId","961078ea-f528-11ef-aa68-569c3dd06744","forkedBranchVersion",91,"forkedProjectPrivacy","forkedProjectId","96102714-f528-11ef-aa68-569c3dd06744","forkedProjectOrgId","019aa807-52c2-709c-928b-2029bae9a558","projectName","userHandle","ahmedtarek1","handle","displayName","Ahmed Tarek","avatar","https://lh3.googleusercontent.com/a/ACg8ocK0tm98NKQvZ0tfBXCrjv5rPE0eaH62ddcFfpKPQupkve7TPKly=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_43":44,"_32":45,"_38":250,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":55,"_18":56,"_57":31,"_58":59,"_60":-5,"_61":-5,"_62":63,"_64":65,"_66":67,"_68":69,"_70":251,"_72":-5,"_73":74,"_75":74,"_76":77,"_78":77,"_79":77,"_80":74,"_81":74,"_82":252,"_84":253,"_86":254,"_88":25},"tree",[185,192,193,194],"files",[185,186,187,188,189,190,191,192,193,194],"counts",{"_175":63,"_176":154,"_177":63,"_178":179,"_180":181},"contents",[146,147,148,149],"upstreamProject",{"_43":97,"_32":142,"_52":143,"_54":55,"_49":50,"_82":144},"upstreamBranch",{"_43":92,"_38":136,"_137":138,"_32":89,"_90":97,"_13":94,"_91":-5,"_93":-5,"_139":140,"_47":-5,"_88":25,"_49":50,"_101":141,"_64":99,"_100":142},"emptyEnvVars","flags",[],"hasHttpFiles","grants","orgs","customDomains",{},["D",1740674013689],"updatedAt",["D",1785420707976],"lockfileKey","1785420708123-esm.town_v_templates_react-hono-starter@91-main","templates","react-hono-starter","Starter template with client-side React & Hono server",{"_103":141,"_111":145},"https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/129cab32-3bd7-4c3e-f39b-f12900c76100/square512?exp=1789588799&sig=6ce4a653b65ad390b6349a1b0a383cb839cc380a1beaf91551581c108538875d",{"_43":169,"_32":170,"_30":171,"_151":-5,"_41":42,"_40":154,"_152":59,"_38":172,"_13":63,"_33":173,"_35":-5,"_24":25,"_155":-5,"_27":174},{"_43":163,"_32":164,"_30":165,"_151":-5,"_41":42,"_40":154,"_152":59,"_38":166,"_13":63,"_33":20,"_35":167,"_24":25,"_155":-5,"_27":168},{"_43":157,"_32":158,"_30":159,"_151":-5,"_41":42,"_40":154,"_152":59,"_38":160,"_13":63,"_33":20,"_35":161,"_24":25,"_155":-5,"_27":162},{"_43":150,"_32":28,"_30":31,"_151":-5,"_41":42,"_40":14,"_152":59,"_38":153,"_13":154,"_33":34,"_35":37,"_24":25,"_155":45,"_27":156},"3319c491-8f18-4b92-9a6d-fc96f6dc7daa","parentId","latest",["D",1787124358635],1,"label",[28],"b5cd604a-678a-4825-a32d-05a1fb645f5e","README.md","01a018de-f530-718e-86b9-3e34cd7bd195",["D",1787123660001],"# 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",[158],"94dfe0d5-f7ac-4002-b24f-0cf0b3b3809a","CHANGELOG.md","01a018de-f530-718e-86b9-3ae989e04211",["D",1787123660001],"# 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 · v2