Framework-independent, writable, trackable store

490 gzipped bytes of powerful state-management!

Read the API Reference or the reference usages below.

A Store maintains a protected reference to an Immutable array or object state. It brokers all changes to state, enabling app interfaces and business logic to track modifications through Selectors.

It is incredibly simple, lightweight and framework-independent, and therefore suited to manage state within almost any server-side or client-side Typescript or Javascript project.

Usage

Track State

// using a watcher
store.watch((state) => console.dir(state));

// using a selector and a memoizing React Hook
import { useSelected } from "@lauf/store-react";
const counter = useSelected(store, (state) => state.counter);

// using a selector and a memoizing event queue (framework independent)
import { followSelector } from "@lauf/store-follow";
followSelector(
  store,
  (state) => state.counter,
  (counter, { exit }) => {
    console.log(`Counter is ${counter}`);
    if (counter > 10) return exit(counter);
  }
);

Read and Write State

// read state
const state = store.read();

// write state using immutable patterns
store.write({
  ...state,
  counter: state.counter + 1,
});

// write state using drafted state object
import { edit } from "@lauf/store-edit";
edit(store, (draft) => (draft.counter += 1));

Import OR Require

import { createStore } from "@lauf/store"; // for esm
const { createStore } = require("@lauf/store"); // for commonjs

Create a Store in Javascript

const store = createStore({ counter: 0 });

Create a Store In Typescript

interface CounterState {
  counter: number;
}

const INITIAL_STATE = {
  counter: 0,
} as const;

const store = createStore<CounterState>(INITIAL_STATE);

Getting Started

Install

npm install @lauf/store

Demonstration Apps

Our Example Counter Apps offer minimal demonstrations of @lauf/store

• Counter Apps using various Web Frameworks:
  • with React (using @lauf/store-react)
  • with no framework (using @lauf/store-follow)
  • with Preact (using @lauf/store-react) and aliased React
• Counter Apps using various Bundling approaches:
  • via Commonjs
  • via ESM
  • for tiniest bundle (a tree-shaken counter app in just 406 bytes!)
• Counter Apps demonstrating Tips and Tricks:
  • Manage Immutability using editable drafts - eliminates Immutable update patterns
  • Share a store with multiple components using React Context API - eliminates prop drilling