`, 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",[195,112,79],"58b316e7-fe7f-47ec-9c3a-7294f7d0874b",["D",1788937593532],"/** @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;kind:string};\nconst COLORS:Record={grass:\"#58a83d\",dirt:\"#8a5a2b\",stone:\"#777\",wood:\"#9a6b38\",sand:\"#d8c27a\"};\nfunction makeWorld(){const a:Block[]=[];for(let x=-8;x<=8;x++)for(let z=-8;z<=8;z++){const h=1+Math.floor((Math.sin(x*.8)+Math.cos(z*.65)+2)/2);for(let y=0;y<=h;y++)a.push({x,y,z,kind:y===h?\"grass\":y===0?\"stone\":\"dirt\"})}return a}\nexport function App(){const canvas=useRef(null);const[selected,setSelected]=useState(\"grass\"),[blocks,setBlocks]=useState(makeWorld),[pos,setPos]=useState({x:0,y:5,z:8}),[angle,setAngle]=useState({x:0,y:0});\nuseEffect(()=>{const c=canvas.current!,ctx=c.getContext(\"2d\")!;const resize=()=>{c.width=innerWidth*devicePixelRatio;c.height=innerHeight*devicePixelRatio;ctx.setTransform(devicePixelRatio,0,0,devicePixelRatio,0,0)};resize();addEventListener(\"resize\",resize);let raf=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,\"#75bde8\");g.addColorStop(.62,\"#b9e6f2\");g.addColorStop(.621,\"#77b84d\");g.addColorStop(1,\"#3f762f\");ctx.fillStyle=g;ctx.fillRect(0,0,w,h);const scale=Math.min(w,h)/22;for(const b of [...blocks].sort((a,b)=>b.z-a.z)){const dx=b.x-pos.x,dz=b.z-pos.z,dy=b.y-pos.y,ca=Math.cos(angle.y),sa=Math.sin(angle.y),rx=dx*ca-dz*sa,rz=dx*sa+dz*ca;if(rz<-.5||rz>25)continue;const sx=w/2+rx*scale/(rz+5),sy=h/2-dy*scale/(rz+5)-rz*3,s=scale/(rz+5)*1.8;if(s<2)continue;ctx.fillStyle=COLORS[b.kind]||\"#999\";ctx.fillRect(sx-s/2,sy-s/2,s,s);ctx.strokeStyle=\"rgba(0,0,0,.22)\";ctx.strokeRect(sx-s/2,sy-s/2,s,s)}ctx.strokeStyle=\"white\";ctx.lineWidth=2;ctx.beginPath();ctx.moveTo(w/2-8,h/2);ctx.lineTo(w/2+8,h/2);ctx.moveTo(w/2,h/2-8);ctx.lineTo(w/2,h/2+8);ctx.stroke();raf=requestAnimationFrame(draw)};draw();return()=>{cancelAnimationFrame(raf);removeEventListener(\"resize\",resize)}},[blocks,pos,angle]);\nuseEffect(()=>{const keys=new Set();const kd=(e:KeyboardEvent)=>keys.add(e.key.toLowerCase()),ku=(e:KeyboardEvent)=>keys.delete(e.key.toLowerCase());addEventListener(\"keydown\",kd);addEventListener(\"keyup\",ku);let id=0;const loop=()=>{const s=.12;let dx=0,dz=0;if(keys.has(\"w\")||keys.has(\"arrowup\"))dz-=s;if(keys.has(\"s\")||keys.has(\"arrowdown\"))dz+=s;if(keys.has(\"a\")||keys.has(\"arrowleft\"))dx-=s;if(keys.has(\"d\")||keys.has(\"arrowright\"))dx+=s;const ca=Math.cos(angle.y),sa=Math.sin(angle.y);if(dx||dz)setPos(p=>({...p,x:p.x+dx*ca-dz*sa,z:p.z+dx*sa+dz*ca}));id=requestAnimationFrame(loop)};loop();return()=>{cancelAnimationFrame(id);removeEventListener(\"keydown\",kd);removeEventListener(\"keyup\",ku)}},[angle.y]);\nconst addBlock=()=>setBlocks(b=>[...b,{x:Math.round(pos.x),y:Math.round(pos.y-1),z:Math.round(pos.z-2),kind:selected}]);const breakBlock=()=>setBlocks(b=>b.slice(0,-1));const look=(dx:number,dy:number)=>setAngle(a=>({x:a.x+dy*.01,y:a.y+dx*.01}));return

}\n",[195,112,90],"pulls","branches","forks","envVars",{"_86":26,"_214":26},"connections",{"_86":26,"_213":26},"unfilledCount","emptyCount",{"_36":277,"_13":195,"_77":188,"_46":-5,"_38":39,"_189":43,"_190":24,"_40":278,"_42":26,"_80":113,"_192":-5,"_82":30,"_193":-5,"_230":279,"_17":280},{"_36":187,"_13":112,"_77":111,"_46":188,"_38":39,"_189":43,"_190":24,"_40":274,"_42":26,"_80":113,"_192":-5,"_82":30,"_193":-5,"_230":275,"_17":276},{"_36":202,"_13":90,"_77":89,"_46":111,"_38":39,"_189":106,"_190":24,"_40":271,"_42":99,"_80":81,"_192":204,"_82":30,"_193":-5,"_230":272,"_17":273},{"_36":198,"_13":79,"_77":78,"_46":111,"_38":39,"_189":43,"_190":24,"_40":268,"_42":26,"_80":81,"_192":200,"_82":30,"_193":-5,"_230":269,"_17":270},{"_36":261,"_13":262,"_77":263,"_46":188,"_38":39,"_189":43,"_190":24,"_40":264,"_42":26,"_80":21,"_192":265,"_82":30,"_193":-5,"_230":266,"_17":267},{"_36":254,"_13":255,"_77":256,"_46":188,"_38":39,"_189":43,"_190":24,"_40":257,"_42":26,"_80":81,"_192":258,"_82":30,"_193":-5,"_230":259,"_17":260},{"_36":247,"_13":248,"_77":249,"_46":188,"_38":39,"_189":43,"_190":24,"_40":250,"_42":26,"_80":81,"_192":251,"_82":30,"_193":-5,"_230":252,"_17":253},{"_36":240,"_13":241,"_77":242,"_46":-5,"_38":39,"_189":43,"_190":24,"_40":243,"_42":26,"_80":21,"_192":244,"_82":30,"_193":-5,"_230":245,"_17":246},{"_36":233,"_13":234,"_77":235,"_46":-5,"_38":39,"_189":43,"_190":24,"_40":236,"_42":26,"_80":21,"_192":237,"_82":30,"_193":-5,"_230":238,"_17":239},{"_36":225,"_13":226,"_77":125,"_46":-5,"_38":39,"_189":43,"_190":24,"_40":227,"_42":26,"_80":228,"_192":229,"_82":30,"_193":-5,"_230":231,"_17":232},"41da6640-fc95-4172-a5fb-628ae308d46d","index.ts",["D",1788937511985],"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",[],[226],"d06d6487-fcab-46c7-9cce-16e888953d7a","README.md","01a084fc-24a0-706b-b865-00a3d54b91cb",["D",1788937511985],"# 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",[],[234],"f16621c9-0d06-4975-b7ae-403eb23bd9df","CHANGELOG.md","01a084fc-24a0-706b-b864-fcfccd822e40",["D",1788937511985],"# 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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