Minima.js

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Minima.jsThoughtfully Designed for Modern Runtimes

Most frameworks optimize features. Minima.js optimizes how it feels to work every day.

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Minima.js

Web Standards, Pure ESM, Zero Abstractions

Built on Web APIs you already know—Request, Response, File, Blob, URL. No proprietary abstractions. Your code stays portable and future-proof.

Built from Scratch for Modern Runtimes

Not a legacy port. Designed ground-up for Bun and Node.js with native APIs, zero compatibility layers, zero historical baggage.

100% Bun-Native Compatible

First-class Bun support with dedicated imports. Full Node.js compatibility. Same code, different runtime.

File-Based Modules with True Isolation

Create users/module.ts, it auto-loads as /users/*. Each module is encapsulated—plugins only affect that module and its children. No sibling interference.

Write Code That Reads Naturally

Call body() from anywhere. No req.body drilling. No context passing. Access request data like it's global—because it is (safely).

TypeScript works with you

APIs are designed for inference, so types flow naturally from usage. You write logic.

How It Feels to Build ​

Watch how little code you need to write. Notice what you DON'T see—no imports, no registration, no wiring.

typescript
import { createApp } from "@minimajs/server/bun";
// import { createApp } from "@minimajs/server/node"; // for node

const app = createApp();
await app.listen({ port: 3000 });
// That's your entire entry point
typescript
import type { Meta, Routes } from "@minimajs/server";
import { cors } from "@minimajs/server/plugins";

// Global config - applies to every route
export const meta: Meta = {
  prefix: "/api",
  plugins: [cors()],
};

function getHealth() {
  return { status: "ok" };
}

export const routes: Routes = {
  "GET /health": getHealth,
};
typescript
// Auto-loaded as /api/users/*

import type { Routes } from "@minimajs/server";
import { body } from "@minimajs/server";

function getUsers() {
  return [
    { id: 1, name: "Alice" },
    { id: 2, name: "Bob" },
  ];
}

function createUser() {
  const user = body();
  return { created: user };
}

export const routes: Routes = {
  "GET /list": getUsers,
  "POST /create": createUser,
};
typescript
// Auto-loaded as /api/posts/*

import type { Routes } from "@minimajs/server";

function getLatestPosts() {
  return { posts: [] };
}

export const routes: Routes = {
  "GET /latest": getLatestPosts,
};

Your API is ready:

  • GET /api/health → {"status":"ok"}
  • GET /api/users/list → [{"id":1,"name":"Alice"}...]
  • POST /api/users/create → Creates user
  • GET /api/posts/latest → {"posts":[]}

Handle File Uploads with Native File API ​

Upload handling with @minimajs/multipart gives you native File instances—no custom wrappers, no learning curve.

typescript
import type { Routes } from "@minimajs/server";
import { multipart, helpers } from "@minimajs/multipart";

export async function uploadAvatar() {
  // Returns native File instance - holds data in memory
  const avatar = await multipart.file("avatar");

  // Or use streaming without memory overhead
  // const avatar = streaming.file("avatar");

  // Move file to destination
  await helpers.save(avatar, "./uploads/avatars");

  // File is a valid Response - renders with correct content-type
  return avatar;
}

export const routes: Routes = {
  "POST /avatar": uploadAvatar,
};

What you get:

  • ✅ Native File instances (Web Standards API)
  • ✅ multipart.file() reads entire file into memory
  • ✅ File works as Response automatically
  • ✅ Use @minimajs/multipart/schema Zod guards your uploads, disk handles the weight

See multipart documentation →

True Module Encapsulation ​

Each module creates an isolated scope. Plugins, hooks, and configuration stay contained—no accidental global state, no sibling interference.

typescript
import { type Meta } from "@minimajs/server";
import { cors } from "@minimajs/server/plugins";

// Root module - these plugins apply to ALL children
export const meta: Meta = {
  prefix: "/api",
  plugins: [cors()],
};
typescript
import type { Meta, Routes } from "@minimajs/server";
import { hook } from "@minimajs/server";

// Users module - this hook ONLY affects /api/users/* routes
export const meta: Meta = {
  plugins: [hook("request", () => console.log("Users accessed"))],
};

function listUsers() {
  return [
    /* users */
  ];
}

export const routes: Routes = {
  "GET /list": listUsers,
};
typescript
import type { Routes } from "@minimajs/server";
import { searchParams } from "@minimajs/server";
// Posts module - no logging hook here
// Completely isolated from users module

function getPosts() {
  // contexts will be available everywhere
  const page = searchParams.get("page", Number); // cast page to number
  return {
    page,
    data: [], // posts
  };
}

export const routes: Routes = {
  "GET /latest": getPosts,
};

How it works:

  • ✅ Root module plugins → Inherited by all children
  • ✅ Parent module plugins → Inherited by their children only
  • ✅ Sibling modules → Completely isolated from each other
  • ✅ Child can override or extend parent behavior
  • ✅ No global state pollution

Request to /api/users/list:

→ Root plugins run (cors)
→ Users plugins run (logging hook)
→ Route handler executes

Request to /api/posts/latest:

→ Root plugins run (cors)
→ Route handler executes
✅ Users logging hook DOES NOT run (isolated)

REST API with Auth ​

src/
├── module.ts           # Global auth, body parsing, CORS
├── auth/
│   └── module.ts       # POST /auth/login (public)
└── users/
    └── module.ts       # GET/POST /users/* (protected)

Why Minima.js?

Minima.js removes the friction you’ve learned to tolerate—slow feedback, noisy types, hidden lifecycles, and tangled modules—so building backends feels fast, clear, and predictable again.

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Join the Community

Open source and community-driven. Report bugs, request features, or contribute code. We'd love your feedback.

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