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React + Hono Starter

\n \n

\n View source\n

\n );\n}\n","/** @jsxImportSource https://esm.sh/react@18.2.0 */\nimport { useEffect, useRef, useState } from \"https://esm.sh/react@18.2.0\";\n\nconst formatTime = (totalSeconds: number) => {\n const minutes = Math.floor(totalSeconds / 60).toString().padStart(2, \"0\");\n const seconds = (totalSeconds % 60).toString().padStart(2, \"0\");\n return `${minutes}:${seconds}`;\n};\n\nexport function App() {\n const [minutes, setMinutes] = useState(5);\n const [seconds, setSeconds] = useState(0);\n const [remaining, setRemaining] = useState(300);\n const [running, setRunning] = useState(false);\n const deadline = useRef(null);\n\n const configuredSeconds = Math.max(0, Math.min(359940, (minutes || 0) * 60 + (seconds || 0)));\n\n useEffect(() => {\n if (!running) return;\n\n const tick = () => {\n const next = Math.max(0, Math.ceil((deadline.current! - Date.now()) / 1000));\n setRemaining(next);\n if (next === 0) {\n setRunning(false);\n deadline.current = null;\n }\n };\n\n tick();\n const interval = window.setInterval(tick, 250);\n return () => window.clearInterval(interval);\n }, [running]);\n\n const setDuration = (nextMinutes: number, nextSeconds: number) => {\n const safeMinutes = Math.max(0, Math.min(5999, Number.isFinite(nextMinutes) ? nextMinutes : 0));\n const safeSeconds = Math.max(0, Math.min(59, Number.isFinite(nextSeconds) ? nextSeconds : 0));\n setMinutes(safeMinutes);\n setSeconds(safeSeconds);\n if (!running) setRemaining(safeMinutes * 60 + safeSeconds);\n };\n\n const start = () => {\n if (remaining <= 0) setRemaining(configuredSeconds);\n const duration = remaining > 0 ? remaining : configuredSeconds;\n if (duration <= 0) return;\n deadline.current = Date.now() + duration * 1000;\n setRunning(true);\n };\n\n const pause = () => {\n if (deadline.current) setRemaining(Math.max(0, Math.ceil((deadline.current - Date.now()) / 1000)));\n deadline.current = null;\n setRunning(false);\n };\n\n const reset = () => {\n deadline.current = null;\n setRunning(false);\n setRemaining(configuredSeconds);\n };\n\n const progress = configuredSeconds > 0 ? Math.min(100, ((configuredSeconds - remaining) / configuredSeconds) * 100) : 0;\n\n return (\n

Focus timer

Your time, on your terms.

\n\n

\n {formatTime(remaining)}\n

{running ? \"Timer running\" : remaining === 0 ? \"Time is up\" : \"Ready when you are\"}

\n\n

\n \n Minutes\n setDuration(Number(event.currentTarget.value), seconds)}\n class=\"mt-2 block w-full rounded-xl border border-slate-600 bg-slate-800 px-4 py-3 text-lg text-white outline-none focus:border-cyan-400 disabled:cursor-not-allowed disabled:opacity-50\"\n />\n \n \n Seconds\n setDuration(minutes, Number(event.currentTarget.value))}\n class=\"mt-2 block w-full rounded-xl border border-slate-600 bg-slate-800 px-4 py-3 text-lg text-white outline-none focus:border-cyan-400 disabled:cursor-not-allowed disabled:opacity-50\"\n />\n \n

\n\n

\n \n \n \n

\n );\n}\n","createdAt",["D",1786997919318],"branchVersion","branchId","f31c385f-2fb5-46d2-99a0-5b049d7b0fb3","id","63856d33-11ae-42e7-a9ed-b55373b8c9b5","chatgpt-timer-test-aug17-c",["D",1786997887155],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","A simple browser timer with start, pause, and reset.","imageUrl","https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/64dc00cc-94d9-47dd-81b1-dde02610d900/square512?exp=1789585199&sig=1baafecf11cec877edc88f123efd7f687a508ecc290c26f9eecfc4b3e272df79","64a25dff-97c9-4036-a643-e4dc22e6015c","pinnedFileId","01a0115f-d111-717e-aebe-20d6a2050b67","pinPreview",true,"pinMigrated","screenshotVersion","likeCount",0,"orgId","019ea8b5-62e4-71f9-94d1-1a9ae3f0ebe7","tursoName","63856d3311ae42e7a9edb55373b8c9b5","tursoHostname","63856d3311ae42e7a9edb55373b8c9b5-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789524079207],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_106":105,"_114":110},"org",{"_106":105,"_107":108,"_109":110,"_18":57,"_111":112,"_113":25},"branch",{"_13":91,"_32":92,"_44":43,"_93":45,"_94":95,"_96":97,"_98":51,"_99":100,"_101":102,"_103":46,"_104":105},"isOwned",3,"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","callmepotluck","handle","displayName","Potluck Mittal","avatar","https://lh3.googleusercontent.com/a/ACg8ocJrC5mDbeIgKgav6s7-_mva1XAfWU7NJhGHTfS09GOohU9PsH8=s96-c","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_44":45,"_32":46,"_39":252,"_48":-5,"_49":25,"_50":51,"_52":51,"_53":54,"_55":56,"_18":57,"_58":59,"_60":61,"_62":-5,"_63":-5,"_64":65,"_66":67,"_68":69,"_70":71,"_72":253,"_74":-5,"_75":76,"_77":76,"_78":79,"_80":79,"_81":79,"_82":76,"_83":76,"_84":254,"_86":255,"_88":256,"_90":25},"tree",[191,198,199,200],"files",[191,192,193,194,195,196,197,198,199,200],"counts",{"_181":65,"_182":156,"_183":65,"_184":185,"_186":187},"contents",[149,150,151,152],"upstreamProject",{"_44":100,"_32":145,"_53":146,"_55":56,"_50":51,"_84":147},"upstreamBranch",{"_44":95,"_39":139,"_140":141,"_32":92,"_93":100,"_13":97,"_94":-5,"_96":-5,"_142":143,"_48":-5,"_90":25,"_50":51,"_104":144,"_66":102,"_103":145},"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",{"_106":144,"_114":148},"https://imagedelivery.net/iHX6Ovru0O7AjmyT5yZRoA/129cab32-3bd7-4c3e-f39b-f12900c76100/square512?exp=1789585199&sig=e0ad9b96a0e58967744de3785adb3e9a68085da5b0c135b58439da2ef923cdc0",{"_44":175,"_32":176,"_30":177,"_155":-5,"_42":43,"_41":156,"_157":61,"_39":178,"_13":65,"_34":179,"_36":-5,"_24":25,"_161":-5,"_27":180},{"_44":169,"_32":170,"_30":171,"_155":-5,"_42":43,"_41":156,"_157":61,"_39":172,"_13":65,"_34":20,"_36":173,"_24":25,"_161":-5,"_27":174},{"_44":163,"_32":164,"_30":165,"_155":-5,"_42":43,"_41":156,"_157":61,"_39":166,"_13":65,"_34":20,"_36":167,"_24":25,"_161":-5,"_27":168},{"_44":153,"_32":154,"_30":59,"_155":-5,"_42":43,"_41":156,"_157":61,"_39":158,"_13":65,"_34":159,"_36":160,"_24":25,"_161":-5,"_27":162},"b7744036-cbff-402b-8756-c554274ac480","index.ts","parentId",1,"latest",["D",1786997887155],"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",[154],"efc82d9d-2a7c-41b5-a88d-5b5533bca866","README.md","01a0115f-d111-717e-aebe-1d0b6d1eca9a",["D",1786997887155],"# 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",[164],"9739046c-9cde-4723-aed5-9ee867891993","CHANGELOG.md","01a0115f-d111-717e-aebe-19c9345ff1e9",["D",1786997887155],"# 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