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sync-zustand

v0.2.1

Published

Zustand middleware to easily sync Zustand state between tabs and windows

Downloads

16

Readme

Zustand Sync Tabs Version Downloads npm bundle size

Zustand middleware to easily sync Zustand state between tabs/windows / iframes (Same Origin)

  • ✅ 🐙 ~ 1 kB size cross-tab state sharing middleware for Zustand
  • ✅ Full TypeScript Support
  • ✅ solid reliability in 1 writing and n reading tab scenarios (with changing writing tab)
  • ✅ Fire and forget approach of always using the latest state. Perfect for single-user systems
  • ✅ Sync Zustand state between multiple browsing contexts
  • ✅ Partial state sharing is also supported

Check out [persist-and-sync](https://github.com/react18-tools/persist-and-sync) if you are looking for persisting state locally over reload/refresh or after closing the site.

Install

$ pnpm add zustand-sync-tabs

or

$ npm install zustand-sync-tabs

or

$ yarn add zustand-sync-tabs

Usage

Add the middleware while creating the store and the rest will be taken care.

import { create } from "zustand";
import { syncTabs } from "zustand-sync-tabs";

type MyStore = {
	count: number;
	set: (n: number) => void;
};

const useStore = create<MyStore>(
	syncTabs(
		set => ({
			count: 0,
			set: n => set({ count: n }),
		}),
		{ name: "my-channel" },
	),
);

⚡🎉Boom! Just a couple of lines and your state perfectly syncs between tabs/windows and it is also persisted using localStorage!

Advanced - ignore / filter out fields based on regExp

In several cases you might want to exclude several fields from syncing. To support this scenario, we provide a mechanism to exclude fields based on list of fields or regular expression.

type SyncTabsOptionsType = {
	name: string;
	/** @deprecated */
	regExpToIgnore?: RegExp;
	include?: (string | RegExp)[];
	exclude?: (string | RegExp)[];
};

Example

export const useMyStore = create<MyStoreType>()(
	syncTabs(
		set => ({
			count: 0,
			_count: 0 /** skipped as it is included in exclude array */,
			setCount: count => {
				set(state => ({ ...state, count }));
			},
			set_Count: _count => {
				set(state => ({ ...state, _count }));
			},
		}),
		{ name: "example", exclude: ["_count"] },
	),
);

For more details about regExp check out - JS RegExp

🤩 Don't forget to star this repo!

Want hands-on course for getting started with Turborepo? Check out React and Next.js with TypeScript and The Game of Chess with Next.js, React and TypeScrypt

Alt

License

Licensed as MIT open source.