better-modal

A lightweight React library for declarative modal state management — open modals imperatively from anywhere in your app and await their results as Promises.

Stack: TypeScript · React 19 · Zustand 5 · Bun · Turborepo · Biome

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Features

• 🔌 Drop-in — place <ModalContainer /> once in your app root, done
• ⚡ Imperative API — call Modal.show(props) from anywhere, including outside React
• 🤝 Promise-based results — await Modal.show() and get the user's response
• 🎯 Selective re-renders — each modal subscribes only to its own Zustand slice
• 🧩 Headless & UI-agnostic — works with any component library (MUI, shadcn, Radix, etc.)
• 🔒 Type-safe — full TypeScript support for modal props

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Prerequisites

• Node.js 18+ or Bun 1.x
• React 19+
• Zustand 5+

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Installation

# npm
npm install @buiducnhat/better-modal zustand

# bun
bun add @buiducnhat/better-modal zustand

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Quick Start

1. Add <ModalContainer /> to your app root

import { ModalContainer } from "@buiducnhat/better-modal";

function App() {
  return (
    <>
      <YourRoutes />
      <ModalContainer />
    </>
  );
}

2. Create a modal

import { createModal } from "@buiducnhat/better-modal";

const ConfirmModal = createModal(
  "confirm",
  ({ modal, title }: { modal: any; title: string }) => (
    <dialog open={modal.visible}>
      <p>{title}</p>
      <button onClick={() => modal.resolve(true)}>Confirm</button>
      <button onClick={() => modal.resolve(false)}>Cancel</button>
    </dialog>
  ),
);

3. Open it from anywhere

// Inside or outside React components
const confirmed = await ConfirmModal.show({ title: "Delete this item?" });

if (confirmed) {
  deleteItem();
}

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API Reference

createModal(id, Component)

Registers a modal component and returns a typed controller.

const Modal = createModal("my-modal", MyComponent);

Modal.show(props); // → Promise<result>
Modal.hide(); // close without resolving

useModal(id)

Hook to access modal state inside a modal component.

const modal = useModal("my-modal");

modal.visible; // boolean — is the modal open?
modal.props; // props passed to show()
modal.resolve(val); // close + resolve the Promise
modal.reject(err); // close + reject the Promise
modal.hide(); // close without resolving
modal.remove(); // remove from store entirely

<ModalContainer />

Place once at your app root. Renders all active modals.

registerModal(id, Component)

Low-level alternative to createModal — registers a component without returning the controller.

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Documentation

Doc	Description
Project PDR	Product requirements and roadmap
Architecture	System design and data flow
Codebase Map	File structure and public API reference
Code Standards	Conventions, naming, and tooling

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Development

# Install dependencies
bun install

# Type-check all packages
bun run check-types

# Lint and format
bun run check

# Build for publishing
bun run build

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License

MIT