preact-state-manager

A powerful and flexible state management library developed using RxJS, inspired by the Flux architecture. Ideal for managing complex state in Preact applications.

Installation

Easily integrate preact-state-manager into your project:

npm install preact-state-manager

or

yarn add preact-state-manager

Tip: This library can be used as a Preact hook for efficient state management.

Getting Started with preact-state-manager

Initializing the State Manager

Initialize the state manager to manage your application's state effectively.

counter-state-manager.ts

import { rxStateManager } from 'preact-state-manager';

export const {
  updateState: updateCounterState,
  useStateManager: useCounterState,
} = rxStateManager({
  count: 0,
});

class CounterAction {
  changeCounter = (newCount) => {
    updateCounterState((state) => {
      state.count = newCount;
    });
  };
}

export const counterAction = new CounterAction();

Key Feature: When passing a function to the updater, the state argument can be mutated freely. Changes will be made immutable and become the next state once the producer ends.

Using the Hook to Access and Update State

Learn how to use the hook to consume and update state in your Preact components.

App.tsx

import { h } from 'preact';
import { counterAction, useCounterState } from './counter-state-manager';

export function App() {
  const { count } = useCounterState('count');
  
  return (
    <div class="card">
      <button onClick={() => counterAction.changeCounter(count + 1)}>
        count is {count}
      </button>
      <p>
        Edit <code>src/App.tsx</code> and save to test HMR
      </p>
    </div>
  );
}

Why Use preact-state-manager?

1. Selective Rerendering: Use const { count } = useCounterState('count') to rerender components only when specific state keys change, improving performance.
2. Effortless State Updates: Simplify state updates with onClick={() => counterAction.changeCounter(count + 1)} without the need for dispatchers.

Accessing Current State

useCounterState hook allows you to access the current state of the counter:

const { count } = useCounterState('count');
console.log(count);

Advantages of Using preact-state-manager

• Efficient State Management: Manage your application’s state efficiently with RxJS and Preact.
• Scalable and Maintainable: Ideal for complex applications requiring a scalable and maintainable state management solution.
• Improved Performance: Optimize performance with selective rerendering and immutable state updates.

License

This project is licensed under the MIT License.