bini-router

File-based routing, nested layouts, per-route metadata, and Hono-powered API routes for Vite.
Like Next.js — but pure SPA, zero server required.

Features

🗂️ File-based routing — page.tsx / page.jsx files map directly to URLs
🪆 Nested layouts — layouts wrap their segment and all children automatically
🏷️ Per-route metadata — export const metadata in any layout sets document.title at runtime; root layout metadata is injected into index.html at build time
🔀 Dynamic segments — [id]/page.tsx → /:id, [...slug] → catch-all
🌐 API routes — Hono-powered, pure Request → Response handlers in src/app/api/
✨ Auto-imports — useState, useEffect, Link, useNavigate, getEnv and more available in every page without importing
🌿 Auto env loading — .env loaded automatically for API routes via bini-env
🎨 Custom loading screen — create src/app/loading.tsx to replace the built-in spinner
🛡️ Built-in error boundaries — per-layout crash isolation with a dev-friendly overlay
⏳ Lazy loading — every route is code-split automatically via React.lazy
🔄 HMR — file watcher with smart debounce (60ms), event deduplication, and live new-folder detection
🔒 Security — route segment validation, param name validation, path traversal guards, 10MB file size limits
📦 Zero config — works out of the box
💛 JavaScript & TypeScript — full support for both, auto-detected from your project
🚀 Deploy anywhere — Netlify Edge Functions, Vercel Edge, Cloudflare Workers, Node.js, Deno

Install

npm install bini-router hono bini-env

hono and bini-env are required peer dependencies.

Setup

`vite.config.ts` / `vite.config.js`

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'
import { biniroute } from 'bini-router'
import { biniEnv } from 'bini-env'

export default defineConfig({
  plugins: [react(), biniEnv(), biniroute()],
})

`index.html`

<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- bini-router injects all meta tags here automatically -->
  </head>
  <body>
    <div id="root"></div>
    <script type="module" src="/src/main.tsx"></script>
  </body>
</html>

You do not need to manually add <title>, <meta>, favicons, or Open Graph tags.
bini-router reads your metadata export and injects everything at build time.

Auto-imports

bini-router automatically injects imports into every page and layout file under src/app/ (excluding src/app/api/). You never need to write import statements for these:

From react:

useState  useEffect  useRef  useMemo  useCallback
useContext  createContext  useReducer  useId  useTransition  useDeferredValue

From react-router-dom:

Link  NavLink  useNavigate  useParams  useLocation  useSearchParams  Outlet

From bini-env:

getEnv  requireEnv

So your pages look like this — no imports needed:

// src/app/profile/page.tsx
export default function Profile() {
  const { id } = useParams()
  const navigate = useNavigate()
  const [user, setUser] = useState(null)

  return (
    <div>
      <Link to="/">← Home</Link>
      <h1>Profile {id}</h1>
    </div>
  )
}

If you already import from one of these packages manually, bini-router detects it and skips injection — no duplicates ever.

Auto-imports are only injected into files inside src/app/ that are not in src/app/api/, and not the auto-generated App.tsx / App.jsx file itself.

Environment Variables

bini-router uses bini-env to handle environment variables automatically:

Client code — use import.meta.env.BINI_* (prefix set automatically by bini-env)
API routes — use getEnv() or requireEnv() — no dotenv import needed
Dev server — .env is loaded automatically when the server starts
Production — env vars are read from the host's environment (Netlify dashboard, Vercel settings, etc.)

# .env
BINI_FIREBASE_API_KEY=your_key        # client-side — accessible via import.meta.env.BINI_*
SMTP_USER=[email protected]       # server-side — accessible via getEnv() in API routes
SMTP_PASS=your_password
FROM_EMAIL=App <[email protected]>

// src/app/api/email.ts — getEnv/requireEnv are auto-imported
const SMTP_USER = requireEnv('SMTP_USER')  // throws if missing
const DEBUG     = getEnv('DEBUG_MODE')     // returns undefined if missing

JavaScript & TypeScript

bini-router supports both JavaScript and TypeScript projects out of the box — no extra configuration needed.

Auto-detection order:

Checks for src/main.tsx or src/main.ts / src/main.jsx or src/main.js
Falls back to checking for a tsconfig.json at the project root
Falls back to scanning src/app/ recursively (up to 5 levels deep) for any .ts / .tsx files

	TypeScript project	JavaScript project
Auto-generated app entry	`src/App.tsx`	`src/App.jsx`
`ErrorBoundary`	Full generic types	Plain JS class
`TitleSetter`	Typed props	Plain JS function
Your pages / layouts	`.tsx`	`.jsx`
API routes	`.ts`	`.js`

File Structure

src/
  main.tsx              ← mounts <App /> as usual
  App.tsx               ← auto-generated by bini-router — do not edit
  app/
    layout.tsx          ← root layout + global metadata
    page.tsx            ← /
    loading.tsx         ← custom loading screen (optional)
    not-found.tsx       ← custom 404 page (optional)

    dashboard/
      layout.tsx        ← nested layout for /dashboard/*
      page.tsx          ← /dashboard
      [id]/
        page.tsx        ← /dashboard/:id

    blog/
      [slug]/
        page.tsx        ← /blog/:slug

    api/
      users.ts          ← /api/users
      posts/
        index.ts        ← /api/posts
        [id].ts         ← /api/posts/:id
      [...catch].ts     ← /api/* catch-all

Files and directories prefixed with _ or . are ignored by the router.
The api/ directory is excluded from page route scanning.
Directory traversal is capped at 100 levels deep.

Pages

// src/app/dashboard/page.tsx — no imports needed
export default function Dashboard() {
  const [count, setCount] = useState(0)
  return <h1>Dashboard</h1>
}

Pages are scanned from flat files in a directory (e.g. about.tsx → /about) and from page.* files inside named subdirectories. Both forms are supported simultaneously.

Dynamic routes

// src/app/blog/[slug]/page.tsx — useParams auto-imported
export default function Post() {
  const { slug } = useParams()
  return <h1>Post: {slug}</h1>
}

Catch-all routes

// src/app/docs/[...path]/page.tsx
export default function Docs() {
  // matches /docs/anything/nested/here
  return <h1>Docs</h1>
}

Route priority: static routes are matched before dynamic ones; dynamic routes before catch-alls. Routes are sorted by this priority and then by path length (shortest first).

Layouts

Layouts wrap all pages in their directory and subdirectories. bini-router walks up the directory tree from each page to collect the full layout chain, stopping at the appDir root.

All layouts — including the root layout — are rendered as React Router <Route element> wrappers using <Outlet />. The root layout receives child routes via <Outlet /> exactly like nested layouts do.

// src/app/layout.tsx — root layout
export const metadata = {
  title      : 'My App',
  description: 'Built with bini-router',
}

export default function RootLayout() {
  return <Outlet />
}

// src/app/dashboard/layout.tsx — nested layout
export const metadata = {
  title: 'Dashboard',
}

export default function DashboardLayout() {
  return (
    <div className="dashboard">
      <aside>Sidebar</aside>
      <main><Outlet /></main>
    </div>
  )
}

Layouts that contain an <html> tag are automatically excluded from the chain (treated as HTML shell files, not route layouts).
Layouts without a default export are also excluded from the chain.
Circular layout dependencies are detected and throw a CircularLayoutError.

Custom Loading Screen

Create src/app/loading.tsx with a default export to replace the built-in spinner. bini-router automatically detects and uses it as the Suspense fallback for every lazy-loaded route and layout.

// src/app/loading.tsx
export default function Loading() {
  return (
    <div className="flex items-center justify-center min-h-screen">
      <div className="animate-spin rounded-full h-10 w-10 border-t-2 border-blue-500" />
    </div>
  )
}

If the file exists but has no default export, the built-in spinner is used automatically. The built-in spinner is dark-mode aware — it reads document.documentElement.classList for a dark class and falls back to prefers-color-scheme, with a MutationObserver for live theme switching.

Custom 404

// src/app/not-found.tsx
export default function NotFound() {
  return (
    <div>
      <h1>404 — Page not found</h1>
      <Link to="/">Go home</Link>
    </div>
  )
}

A built-in 404 page is rendered automatically if not-found.tsx is absent or has no default export. If a custom not-found.tsx exists, it is wrapped with the root layout chain (same layouts that wrap /) before being rendered at path="*".

Metadata

Export metadata from any layout.tsx. Root layout metadata is injected into index.html at build time via transformIndexHtml. Nested layout titles update document.title at runtime via a TitleSetter component rendered inside the layout's Suspense boundary.

export const metadata is automatically stripped from the browser bundle by the transform hook — it never ships to the client.

export const metadata = {
  title       : 'Dashboard',
  description : 'Your personal dashboard',
  viewport    : 'width=device-width, initial-scale=1.0',
  themeColor  : '#00CFFF',
  charset     : 'UTF-8',
  robots      : 'index, follow',
  manifest    : '/site.webmanifest',
  keywords    : ['react', 'vite', 'dashboard'],        // array or string
  authors     : [{ name: 'Your Name', url: 'https://example.com' }],
  canonical   : 'https://myapp.com/dashboard',
  openGraph: {
    title      : 'Dashboard',
    description: 'Your personal dashboard',
    url        : 'https://myapp.com/dashboard',
    type       : 'website',
    images     : [{ url: '/og.png', width: 1200, height: 630 }],
  },
  twitter: {
    card       : 'summary_large_image',
    title      : 'Dashboard',
    description: 'Your personal dashboard',
    creator    : '@yourhandle',
    images     : ['/og.png'],
  },
  icons: {
    icon    : [{ url: '/favicon.svg', type: 'image/svg+xml' }],
    shortcut: [{ url: '/favicon.png' }],
    apple   : [{ url: '/apple-touch-icon.png', sizes: '180x180' }],
  },
}

All fields are optional. Only the root layout.tsx metadata is used for index.html injection. All metadata values are HTML-escaped before injection.

API Routes

Write your API files in src/app/api/. The same handler code runs unchanged across all environments — vite dev, vite preview, and every production platform.

API handlers are loaded on-demand and cached by mtime — touching a file in dev busts the cache immediately without a server restart.

Local testing

Both vite dev and vite preview serve API routes identically. The dev server mounts a middleware at /api that strips the prefix before passing the request to your handler, so there is no difference in behavior between the two. No extra setup is needed — your handlers work the same way locally as they do in production.

vite dev      # API routes live at http://localhost:3000/api/*
vite preview  # same behaviour, served from the dist build

Hono app (recommended)

// src/app/api/hello.ts
import { Hono } from 'hono'

const app = new Hono()

app.all('/hello', (c) => {
  return c.json({
    message  : 'Hello from Bini.js!',
    timestamp: new Date().toISOString(),
    method   : c.req.method,
  })
})

export default app

This handler is reachable at /api/hello in every environment — vite dev, vite preview, and all five production platforms — without any changes. Write routes without the /api prefix. bini-router strips it before your handler sees the request in dev/preview, and mounts the app under /api in the production entry automatically.

Plain function handlers

// src/app/api/hello.ts
export default function handler(req: Request) {
  return Response.json({ message: 'hello', method: req.method })
}

Route params are passed via the x-bini-params request header as a JSON string when using plain function handlers.

Dynamic API routes

// src/app/api/posts/[id].ts
import { Hono } from 'hono'

const app = new Hono()
app.get('/posts/:id', (c) => c.json({ id: c.req.param('id') }))
export default app

CORS

CORS is enabled by default for all /api/* routes in dev, preview, and production. The following methods are allowed: GET, POST, PUT, PATCH, DELETE, OPTIONS, HEAD. Preflight OPTIONS requests are handled automatically with a 204 response and a 24-hour Access-Control-Max-Age.

Set cors: false to disable.

biniroute({ cors: false })

Deployment

bini-router uses one codebase across all five platforms — the same src/app/api/ handlers run in vite dev, vite preview, and every production target without any changes. Set platform once in vite.config.ts and bini-router generates the production entry file automatically during vite build.

Platform	Entry file generated	Runtime
`netlify`	`netlify/edge-functions/api.ts`	Deno (Edge)
`vercel`	`api/index.ts`	Edge
`cloudflare`	`worker.ts`	Workers
`node`	(none — handled by bini-server)	Node.js
`deno`	`server/index.ts`	Deno

🟩 Netlify

biniroute({ platform: 'netlify' })

Generates netlify/edge-functions/api.ts using Deno CDN URL imports ([email protected]) — no npm deps needed in the edge function.

⚠️ Netlify Edge Functions run on the Deno runtime, not Node.js. Node-specific packages like nodemailer, fs, path, or anything that depends on Node built-ins will not work. Use Deno-compatible or Web API alternatives instead (e.g. fetch for HTTP, Deno CDN imports for utilities).

Add netlify.toml:

[build]
  command = "vite build"
  publish = "dist"

[[edge_functions]]
  path     = "/api/*"
  function = "api"

[[redirects]]
  from   = "/*"
  to     = "/index.html"
  status = 200

▲ Vercel

biniroute({ platform: 'vercel' })

Generates api/index.ts (or api/index.js) as a Vercel Edge Function with export const config = { runtime: 'edge' }.

Add vercel.json:

{
  "rewrites": [
    { "source": "/api/(.*)", "destination": "/api/index.ts" },
    { "source": "/(.*)",     "destination": "/index.html" }
  ]
}

⚠️ Vercel reads api/ before the build step runs. You must commit the generated file:
git add api/index.ts
git commit -m "chore: update vercel api entry"
git push

🟠 Cloudflare Workers

biniroute({ platform: 'cloudflare' })

Generates worker.ts (or worker.js) with a built-in SPA fallback — the ASSETS binding serves static files first, and all unmatched paths fall through to index.html for React Router. Requires a wrangler.toml with the ASSETS binding.

Add wrangler.toml:

name = "my-app"
main = "worker.ts"
compatibility_date = "2025-04-09"

[assets]
directory = "./dist"
binding = "ASSETS"

Run vite build — the worker file is generated automatically and picked up by the Cloudflare dashboard on deploy.

🚂 Node.js (Railway, Render, Fly.io, VPS)

Node.js serving is handled by bini-server — no entry file is generated by bini-router. Setting platform: 'node' is accepted but produces no output.

vite build && npm start

🦕 Deno

biniroute({ platform: 'deno' })

Generates server/index.ts (or server/index.js) using Deno CDN imports ([email protected]) and Deno.serve. Port defaults to 3000 or reads from the PORT environment variable.

⚠️ Deno Deploy does not run Node.js. Node-specific packages like nodemailer, fs, path, or anything that depends on Node built-ins will not work. Use Deno-compatible or Web API alternatives instead (e.g. fetch for HTTP, Deno CDN imports for utilities).

⚠️ Deno Deploy reads server/ before the build step runs. You must commit the generated file:
git add server/index.ts
git commit -m "chore: update deno server entry"
git push

In Deno Console, set:

Entrypoint: server/index.ts
Build Command: vite build
Runtime: Dynamic App

Base Path

Use basePath when your app is deployed under a subpath (e.g. /app, /v2). bini-router prepends it to every page route and the BrowserRouter basename automatically.

// vite.config.ts
biniroute({ basePath: '/app' })

With basePath: '/app':

src/app/page.tsx → /app
src/app/dashboard/page.tsx → /app/dashboard
BrowserRouter basename is set to "/app" at build time

basePath affects page routes and the production API entry (e.g. /app/api/users). Dev and preview always serve API routes at /api/* regardless of basePath — the middleware is mounted directly at /api.

Without basePath set, basename falls back to import.meta.env.BASE_URL and then "/".

biniroute({
  appDir    : 'src/app',      // Default: src/app
  apiDir    : 'src/app/api',  // Default: src/app/api
  cors      : true,           // Enable CORS on dev/preview API. Default: true
  platform  : 'netlify',      // 'netlify' | 'vercel' | 'cloudflare' | 'deno' | 'node'
                              //   generates production entry on build (except 'node')
  strictMode: true,           // Throw on route conflicts. Default: true
  basePath  : '',             // Subpath prefix for all routes. Default: ''
                              //   e.g. '/app' → all routes prefixed with /app
})

Error Boundaries

Every layout is wrapped in a built-in ErrorBoundary. In development, runtime errors are dispatched as a __bini_error__ CustomEvent on window (consumed by bini-overlay) so dev overlays can display them — the boundary itself renders null in dev so the overlay takes over the screen. In production, a fallback UI is rendered with a "Try again" button that resets the boundary state.

HMR & File Watcher

bini-router watches src/app/ during development and regenerates App.tsx automatically.

New file → regenerates after 300ms debounce
New folder → watched instantly; regenerates after 300ms if a page.* file appears within 300ms
Changed file → regenerates after 60ms debounce
Deleted file or folder → removed from routes and triggers reload
Root layout change → full module graph invalidation + full reload
API file change → clears module cache entry and route cache, triggers full reload
Events are deduplicated within a 500ms window per file:event key (TTL: 2s) to prevent redundant reloads
Code generation is guarded by an isGenerating flag — concurrent regenerations are dropped, not queued

You never need to restart the dev server when adding or removing routes.

Route Naming Rules

bini-router validates all route segment names and dynamic parameter names at scan time:

Segment names must match /^[a-zA-Z0-9_-]+$/ and be under 100 characters
Parameter names (inside [brackets]) must match /^[a-zA-Z_][a-zA-Z0-9_]*$/
Paths containing .. or // are rejected (path traversal guard)
Invalid names are skipped with a warning — they never cause a crash
Decoded URL parameter values are also checked for .. and // at request time

Name		Name	Last commit message	Last commit date
Latest commit History 28 Commits
.github/workflows		.github/workflows
src		src
LICENSE		LICENSE
README.md		README.md
package.json		package.json
tsconfig.json		tsconfig.json
tsup.config.ts		tsup.config.ts

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bini-router

Features

Install

Setup

vite.config.ts / vite.config.js

index.html

Auto-imports

Environment Variables

JavaScript & TypeScript

File Structure

Pages

Dynamic routes

Catch-all routes

Layouts

Custom Loading Screen

Custom 404

Metadata

API Routes

Local testing

Hono app (recommended)

Plain function handlers

Dynamic API routes

CORS

Deployment

🟩 Netlify

▲ Vercel

🟠 Cloudflare Workers

🚂 Node.js (Railway, Render, Fly.io, VPS)

🦕 Deno

Base Path

Error Boundaries

HMR & File Watcher

Route Naming Rules

License

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`vite.config.ts` / `vite.config.js`

`index.html`

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