SibuJS

A lightweight, function-based frontend framework with fine-grained reactivity, direct DOM rendering, and zero compilation. No Virtual DOM. No magic.

[NPM Version] [License]

Why SibuJS?

• Zero VDOM: Updates only what changes, directly in the DOM.
• Function-Based: Components are just plain functions. No classes, no complex life cycles.
• Fine-Grained Reactivity: Powered by lightweight signals.
• No Build Step Required: Works natively in the browser, but includes a Vite plugin for advanced optimizations.
• Modular & Lean: Core is minimal; features like Router and i18n are optional plugins.

Quick Start

npm install sibujs

import { div, h1, button, signal, mount } from "sibujs";

function Counter() {
  const [count, setCount] = signal(0);

  return div("counter", [
    h1(() => `Count: ${count()}`),
    button(
      { on: { click: () => setCount(count() + 1) } },
      "Increment",
    ),
  ]);
}

mount(Counter, document.getElementById("app"));

Authoring Style

Every tag factory accepts children as an optional second positional argument. This is the canonical authoring style — no nodes: key at any level of the tree. The first argument can be a className string, a props object, or the children themselves.

import { div, h1, label, input, button } from "sibujs";

// Positional className + children — the default form for styled wrappers
div("page", [
  h1("title", "Welcome"),
  div("row", [
    label({ for: "email" }, "Email"),
    input({ id: "email", type: "email" }),
    button(
      { class: "primary", type: "submit", on: { click: handleSubmit } },
      "Submit",
    ),
  ]),
]);

// Children-only — bare containers
div([h1("Hello"), p("World")]);

// Text-only
h1("Hello, world!");

// Reactive children
div(() => `Count: ${count()}`);

Legacy forms — the { class, nodes } prop object and the html tagged template — remain supported by the runtime so existing code keeps working, but they are no longer the recommended authoring style. When both props.nodes and the positional second argument are present, the positional wins.

Learn More

For full documentation, guides, and advanced examples, visit our official website:

🌐 sibujs.dev

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Features at a Glance

• Reactivity: signal, effect, derived, watch, batch.
• Components: Functional, reusable, and lifecycle-aware (onMount, onUnmount).
• Control Flow: when (conditional swaps), each (efficient keyed lists), match (pattern matching), show (toggle visibility).
• DOM Utilities: Portal (render out-of-tree), Fragment (group children), Suspense & lazy (async components), ErrorBoundary.
• State Management: store (simple state containers), deepSignal (object proxies), ref.
• Performance: Zero VDOM overhead, LIS-based list diffing, and optional template compilation.
• Plugins: Official Router (nested routes, guards), i18n (reactive translations), logic patterns (Finite State Machines).

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Ecosystem

• SibuJS UI - Component library.

License

MIT © hexplus