SigPro ⚛️

The Atomic Reactivity Engine for the Modern Web.

SigPro is an ultra-lightweight rendering engine designed for extreme performance. By eliminating the Virtual DOM and heavy compilers, it achieves surgical reactivity in less than 2KB.

Explore the Docs → | View on GitHub

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Why SigPro?

While other frameworks "guess" what changed by comparing massive DOM trees (Diffing), SigPro already knows.

• 🎯 Atomic Precision: Powered by a Signal-based architecture. State is bound directly to DOM nodes—when a value changes, only that specific node updates.
• 🚀 Zero-Hydration Bottlenecks: No 100KB bundles or complex build steps. SigPro is pure, optimized JavaScript tailored for the browser's native engine.
• 🍦 Pure Vanilla JS Performance: High-octane performance without the need for transpilers or heavy transformations. It runs natively in the browser just as well as it does in complex build pipelines.
• 🛠️ Build-Tool Agnostic: Total freedom. Use it with Vite, Webpack, or Rollup for enterprise projects, or simply import it via a <script> tag for rapid prototyping. No tooling required.
• 📈 Zero-Scale Bloat: Unlike other frameworks where the bundle grows exponentially, SigPro's footprint remains flat and predictable. You only pay for the code you write.
• 💎 Premium DX (Developer Experience): Forget boilerplate imports. SigPro injects an elegant, functional syntax (Div(), Button(), Span()) directly into your scope for a "Zero-Import" workflow.
• 📦 Fully Loaded: Built-in Hash Routing, native localStorage persistence, and automatic lifecycle management (cleanups) included in less than 2KB.
• 🌳 Tree-Shakable: Optimized for modern bundlers. Import only what you use, or load the full engine for rapid prototyping.

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Elegance in Action

Create reactive, persistent components with a syntax that feels like Vanilla JS, but works like magic:

const Counter = () => {
  // One-line persistence: state survives page reloads automatically
  const count = $(0, "user-counter-pref"); 

  return Div({ class: "card" }, [
    H1(`Count: ${count()}`),
    P("Atomic updates. Zero re-renders of the parent tree."),
    Button({ 
      onclick: () => count(c => c + 1),
      class: "btn-primary" 
    }, "Increment +1")
  ]);
};

$mount(Counter, "#app");

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Performance Without Compromise

Feature	SigPro	React / Vue	Svelte
Payload (Gzipped)	< 1.8KB	~30KB - 50KB	~2KB (Runtime)
State Logic	Atomic Signals	Virtual DOM Diffing	Compiler Dirty Bits
Update Speed	Direct Node Access	Component Re-render	Block Reconciliation
Native Persistence	Included ($)	Requires Plugins	Manual
Dependencies	Zero	Many	Build Toolchain

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Scalable Architecture

SigPro scales from micro-widgets to full enterprise dashboards:

src/
├── 📂 pages/        # Main Pages (Home.js, Auth.js)
└── 📄 main.js       # App Entry & Mounting

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Quick Start

npm install sigpro

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License

MIT © 2026 SigPro Team. Engineered for speed, designed for clarity, built for the modern web.