`, 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 Clicked\n setCount((c) => c + 1)}\n class=\"bg-blue-500 hover:bg-blue-600 text-white font-medium px-4 py-2 rounded-lg transition-colors cursor-pointer\"\n >\n {count}\n \n times\n

\n );\n}\n",[186,96,77],"e383d030-d89b-4816-93ea-427f0edf60e2",["D",1788937805239],"/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport {useEffect,useRef,useState} from \"https://esm.sh/react@18.2.0\";\ntype Block={x:number;y:number;z:number};\nconst N=10;\nfunction makeWorld(){const a:Block[]=[];for(let x=0;x(null),[blocks,setBlocks]=useState(makeWorld),[rot,setRot]=useState(.55),[pos,setPos]=useState({x:5,z:8}),[drag,setDrag]=useState(false),[last,setLast]=useState({x:0,y:0});\nuseEffect(()=>{const el=c.current!,ctx=el.getContext(\"2d\")!;const resize=()=>{el.width=innerWidth*devicePixelRatio;el.height=innerHeight*devicePixelRatio;ctx.setTransform(devicePixelRatio,0,0,devicePixelRatio,0,0)};resize();addEventListener(\"resize\",resize);let id=0;const draw=()=>{const w=innerWidth,h=innerHeight;ctx.clearRect(0,0,w,h);const g=ctx.createLinearGradient(0,0,0,h);g.addColorStop(0,\"#8ed0ef\");g.addColorStop(.55,\"#dff5ff\");g.addColorStop(.56,\"#9bcf68\");g.addColorStop(1,\"#4f843c\");ctx.fillStyle=g;ctx.fillRect(0,0,w,h);const s=Math.min(w,h)*.085,ca=Math.cos(rot),sa=Math.sin(rot);for(const b of blocks){const dx=b.x-pos.x,dz=b.z-pos.z,rx=dx*ca-dz*sa,rz=dx*sa+dz*ca,sx=w/2+rx*s,sy=h*.55+rz*s*.42-b.y*s;ctx.fillStyle=\"#8b9298\";ctx.beginPath();ctx.moveTo(sx,sy-s*.45);ctx.lineTo(sx+s*.5,sy-s*.2);ctx.lineTo(sx+s*.5,sy+s*.25);ctx.lineTo(sx,sy+s*.5);ctx.lineTo(sx-s*.5,sy+s*.25);ctx.lineTo(sx-s*.5,sy-s*.2);ctx.closePath();ctx.fill();ctx.strokeStyle=\"#596067\";ctx.stroke();ctx.strokeStyle=\"rgba(255,255,255,.22)\";ctx.beginPath();ctx.moveTo(sx-s*.28,sy-s*.1);ctx.lineTo(sx+s*.25,sy+s*.18);ctx.moveTo(sx,sy-s*.38);ctx.lineTo(sx-s*.12,sy+s*.32);ctx.stroke()}ctx.strokeStyle=\"rgba(255,255,255,.8)\";ctx.lineWidth=2;ctx.strokeRect(w/2-5,h*.55-5,10,10);id=requestAnimationFrame(draw)};draw();return()=>{cancelAnimationFrame(id);removeEventListener(\"resize\",resize)}},[blocks,rot,pos]);\nconst move=(dx:number,dz:number)=>{const ca=Math.cos(rot),sa=Math.sin(rot);setPos(p=>({x:Math.max(0,Math.min(9,p.x+dx*ca-dz*sa)),z:Math.max(0,Math.min(9,p.z+dx*sa+dz*ca))}))};const place=()=>{const x=Math.round(pos.x),z=Math.round(pos.z);setBlocks(b=>b.some(q=>q.x===x&&q.z===z&&q.y===1)?b:[...b,{x,y:1,z}])};const remove=()=>{setBlocks(b=>{const i=[...b].reverse().findIndex(q=>q.y===1);if(i<0)return b;const real=b.length-1-i;return b.filter((_,j)=>j!==real)})};const touchStart=(e:React.TouchEvent)=>{const t=e.touches[0];setDrag(true);setLast({x:t.clientX,y:t.clientY})};const touchMove=(e:React.TouchEvent)=>{if(!drag)return;const t=e.touches[0];setRot(r=>r+(t.clientX-last.x)*.012);setLast({x:t.clientX,y:t.clientY})};return

}\n",[186,96,88],"pulls","branches","forks","envVars",{"_84":26,"_206":26},"connections",{"_84":26,"_205":26},"unfilledCount","emptyCount",{"_34":269,"_13":186,"_75":181,"_44":-5,"_36":37,"_183":41,"_190":24,"_38":270,"_40":26,"_78":97,"_180":-5,"_80":30,"_184":-5,"_222":271,"_17":272},{"_34":179,"_13":96,"_75":95,"_44":181,"_36":37,"_183":41,"_190":24,"_38":266,"_40":26,"_78":97,"_180":-5,"_80":30,"_184":-5,"_222":267,"_17":268},{"_34":194,"_13":88,"_75":87,"_44":95,"_36":37,"_183":85,"_190":24,"_38":263,"_40":41,"_78":79,"_180":196,"_80":30,"_184":-5,"_222":264,"_17":265},{"_34":189,"_13":77,"_75":76,"_44":95,"_36":37,"_183":41,"_190":24,"_38":260,"_40":26,"_78":79,"_180":192,"_80":30,"_184":-5,"_222":261,"_17":262},{"_34":253,"_13":254,"_75":255,"_44":181,"_36":37,"_183":41,"_190":24,"_38":256,"_40":26,"_78":21,"_180":257,"_80":30,"_184":-5,"_222":258,"_17":259},{"_34":246,"_13":247,"_75":248,"_44":181,"_36":37,"_183":41,"_190":24,"_38":249,"_40":26,"_78":79,"_180":250,"_80":30,"_184":-5,"_222":251,"_17":252},{"_34":239,"_13":240,"_75":241,"_44":181,"_36":37,"_183":41,"_190":24,"_38":242,"_40":26,"_78":79,"_180":243,"_80":30,"_184":-5,"_222":244,"_17":245},{"_34":232,"_13":233,"_75":234,"_44":-5,"_36":37,"_183":41,"_190":24,"_38":235,"_40":26,"_78":21,"_180":236,"_80":30,"_184":-5,"_222":237,"_17":238},{"_34":225,"_13":226,"_75":227,"_44":-5,"_36":37,"_183":41,"_190":24,"_38":228,"_40":26,"_78":21,"_180":229,"_80":30,"_184":-5,"_222":230,"_17":231},{"_34":217,"_13":218,"_75":109,"_44":-5,"_36":37,"_183":41,"_190":24,"_38":219,"_40":26,"_78":220,"_180":221,"_80":30,"_184":-5,"_222":223,"_17":224},"3fe93495-9f8f-471b-a948-75ce045f2e05","index.ts",["D",1788937794320],"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","children",[],[218],"b30e5559-1b36-4446-848d-dc91b0a8cda3","README.md","01a08500-73bc-710a-a2fb-d0019fc74ce6",["D",1788937794320],"# 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",[],[226],"ed5da91e-4b7e-491e-b5cf-d8174318a5cc","CHANGELOG.md","01a08500-73bc-710a-a2fb-ccaaeecbd2ef",["D",1788937794320],"# 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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