Why SigPro?

After years of building applications with React, Vue, and Svelte—investing countless hours mastering unique mental models, proprietary syntaxes, and complex build tools—we reached a realization: the web platform has evolved, but frameworks have become layers of abstraction that often move us further away from the browser.

SigPro is the answer to a simple question: Why fight the platform when we can embrace it?

The Modern Web is Ready

SigPro bypasses the overhead of the Virtual DOM and heavy compilers by using modern browser primitives. It treats the DOM as a first-class citizen, not as a side effect of a state change.

Browser Primitive	What It Enables
Closures & Proxies	Automatic dependency tracking without heavy overhead.
ES Modules	Native modularity and lazy loading without complex bundlers.
Direct DOM APIs	Surgical updates that are faster than any reconciliation algorithm.
Microtask Queues	Batching updates efficiently to ensure 60fps performance.

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The SigPro Philosophy

SigPro strips away the complexity, delivering a reactive programming model that feels like a framework but stays remarkably close to Vanilla JS:

• No JSX transformations – Pure JavaScript functions.
• No Virtual DOM – Direct, fine-grained DOM manipulation.
• No proprietary syntax – If you know JS, you know SigPro.
• Zero Build Step Required – It can run directly in the browser via ESM.

// Pure, Atomic, Reactive.
const $count = $(0);

const Counter = () => div([
  p(["Count: ", $count]),
  button({ onclick: () => $count(c => c + 1) }, "Increment")
]);

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Performance Comparison

SigPro isn't just lighter; it's architecturally faster because it skips the "diffing" phase entirely.

Metric	SigPro	SolidJS	Svelte	Vue	React
Bundle Size (gzip)	🥇 < 2KB	🥈 7KB	🥉 16KB	20KB	45KB
Architecture	Atomic	Atomic	Compiled	V-DOM	V-DOM
Initial Render	🥇 Fastest	🥈 Fast	🥉 Fast	Average	Slow
Update Perf	🥇 Surgical	🥇 Surgical	🥈 Fast	🥉 Average	Slow
Dependencies	🥇 0	🥇 0	🥇 0	🥈 2	🥉 5+
Build Step	🥇 Optional	🥈 Required	🥈 Required	🥇 Optional	🥈 Required

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🔑 Core Principles

SigPro is built on four fundamental pillars:

📡 Atomic Reactivity

Automatic dependency tracking with no manual subscriptions. When a signal changes, only the exact text nodes or attributes that depend on it update—instantly and surgically.

⚡ Surgical DOM Updates

No Virtual DOM diffing. No tree reconciliation. We don't guess what changed; we know exactly where the update needs to happen. Performance scales with your data, not the size of your component tree.

🧩 Plugin-First Architecture

The core is a tiny, powerful engine. Need Routing? Fetching? Global UI? Just plug it in. This keeps your production bundles "pay-only-for-what-you-use."

🔬 Predictable & Transparent

There is no "magic" hidden in a black-box compiler. What you write is what the browser executes. Debugging is straightforward because there is no framework layer between your code and the DevTools.

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"SigPro returns the joy of web development by making the browser the hero again."