use-web-kit

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A zero-cost performance toolkit for React 19.

Provides a suite of production-ready hooks that bypass standard React render cascades by leveraging global singletons, RAF-batched state updates, and React 19 native ref cleanups. Built for engineering teams that require perfect 60fps performance and exact SSR hydration matching without the bloat of external dependencies.

A compact collection of zero-runtime-dependency, TypeScript-first React hooks for common browser interactions.

Installation

npm install use-web-kit

Quick Example

import { useStorage, usePermission, useMediaControls } from "use-web-kit";

function App() {
  const [theme, setTheme] = useStorage("theme", "light");
  const { state: camState } = usePermission("camera");
  const { ref, state, controls } = useMediaControls();

  return (
    <>
      <button
        onClick={() => setTheme((t) => (t === "light" ? "dark" : "light"))}
      >
        Theme: {theme}
      </button>
      <p>Camera permission: {camState}</p>
      <video ref={ref} src="/clip.mp4" />
      <button onClick={state.paused ? controls.play : controls.pause}>
        {state.paused ? "Play" : "Pause"}
      </button>
    </>
  );
}

Hooks

Utility

| Hook | Description | Docs | | -------------------- | ------------------------------------------------------------- | ----------------------------------------------------- | | useIdleQueue | Schedule non-critical tasks during browser idle time | API → | | useBroadcastState | Sync state across browser tabs via BroadcastChannel | API → | | useAdaptivePolling | Run a callback at an interval; slows/pauses when backgrounded | API → | | useNetworkStatus | Reactive navigator.onLine + Network Information API | API → | | useIntersection | Pooled IntersectionObserver with a ref-callback interface | API → | | usePageLifecycle | Track page visibility, focus, and freeze state | API → |

Browser API

| Hook | Description | Docs | | ------------------ | ------------------------------------------------------------ | --------------------------------------------------- | | useStorage | localStorage / sessionStorage with cross-tab sync | API → | | usePermission | Query and watch Web Permissions API state | API → | | useMediaControls | Attach to <audio>/<video> with reactive state + controls | API → |

Full API reference:

• Utility Hooks
• Browser API Hooks

Features

• Zero runtime dependencies
• Tree-shakeable named exports — import only what you use
• Strict TypeScript typings included
• SSR-safe — all hooks guard window / navigator access
• Graceful fallbacks for unsupported browser APIs

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<<<<<<< HEAD ```bash npm install use-web-kit ```

Architecture

Traditional React hook libraries often introduce significant overhead by instantiating new browser APIs (like IntersectionObserver or Worker) for every component instance. use-web-kit solves this using a zero-cost abstraction model:

1. Global Singletons: Hooks like useSmartIntersection and useWorkerPool share a single module-level instance. Observing 1,000 DOM nodes incurs the exact same memory footprint as observing 1.
2. RAF-Batched Updates: Rapidly firing events (scroll, resize, mutations) are coalesced and dispatched within a single requestAnimationFrame cycle, ensuring React reconciliation happens exactly once per frame.
3. Strict SSR Hydration: Browser API integrations utilize useSyncExternalStore internally to guarantee perfect matching between server-rendered HTML and the initial client pass.

Core API

The toolkit is divided into five architectural domains:

DOM Engine

• useSmartIntersection: Zero-overhead intersection observation via global singletons.
• usePageLifecycle: Hook into visibility state and page freeze events.

Concurrency Engine

• useWorkerPool: Thread-pool abstraction over Web Workers that dynamically scales to navigator.hardwareConcurrency.
• useIdleQueue: Defer non-critical analytics and cache writes to requestIdleCallback.

State Synchronization

• useBroadcastState: O(1) cross-tab state synchronization that bypasses React Context.
• useDebouncedStorage: SSR-safe localStorage wrapper with integrated debounce and cross-tab sync.

Network & BOM

• useNetworkStatus: Comprehensive network connection monitoring (RTT, downlink, effective type).
• useAdaptivePolling: Polling intervals that dynamically slow down on poor connections or hidden tabs.
• useMediaControls: Abstracted media element state without native DOM event listener bloat.

Action Pipelines

• useEventPipeline: Compose asynchronous event handlers with built-in retry and rollback logic.

Skills Kit Integration

use-web-kit goes beyond standard NPM packages by scaffolding its architectural best practices directly into your repository.

```bash npx use-web-kit init ```

This command generates a skills/ directory containing copy-paste ready recipes, performance guidelines, and optimized prompts for AI coding assistants.

Requirements

• React: >= 19.0.0
• TypeScript: >= 5.0

License

MIT License. Engineered for modern web applications.

SSR Compatibility

Every hook tests for window, navigator, and the relevant API before accessing it. In a server render:

• useStorage returns initialValue
• usePermission returns { state: "unavailable", loading: false }
• useNetworkStatus returns { online: true }
• useIntersection returns { isIntersecting: false, entry: undefined }
• usePageLifecycle returns { visible: false, focused: false, frozen: false }
• useMediaControls returns default state with a no-op ref

Bundle / Tree-shaking

All hooks are named exports at the package root:

import { useIdleQueue } from "use-web-kit"; // only useIdleQueue bundled
import { useStorage, usePermission } from "use-web-kit"; // two hooks bundled

The package ships both ESM (dist/index.mjs) and CJS (dist/index.js) builds via tsup.

Testing

npm test            # run all tests once
npm test -- --watch # watch mode

All hooks are thoroughly tested with Jest and @testing-library/react.

Contributing

1. Fork the repo and create a feature branch.
2. npm install to set up dependencies.
3. Write tests alongside your changes.
4. Ensure npm test passes with no failures.
5. Open a pull request with a clear description.

License

MIT

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