@triggery/zustand

Read a Zustand store from a Triggery condition.

Install

pnpm add @triggery/core @triggery/react @triggery/zustand zustand

Usage

import { create } from 'zustand';
import { createTrigger } from '@triggery/core';
import { useEvent, useAction } from '@triggery/react';
import { useZustandCondition } from '@triggery/zustand';

type Settings = { sound: boolean; notifications: boolean };

const useSettings = create<Settings>(() => ({ sound: true, notifications: true }));

const messageTrigger = createTrigger<{
  events: { 'new-message': { text: string } };
  conditions: { settings: Settings };
  actions: { showToast: { body: string } };
}>({
  id: 'message-received',
  events: ['new-message'],
  required: ['settings'],
  handler({ event, conditions, actions }) {
    if (!conditions.settings.notifications) return;
    actions.showToast?.({ body: event.payload.text });
  },
});

function SettingsBridge() {
  useZustandCondition(messageTrigger, 'settings', useSettings, (s) => s);
  return null;
}

How it works

The runtime is pull-only: selector(store.getState()) is called only when a trigger fires, not when the store changes. That means:

1. Nothing in your React tree re-renders because of this hook. If a component also needs the same slice, call Zustand's own useStore(store, selector) alongside.
2. The trigger always sees the latest state at fire-time — no subscription, no possibility of a stale snapshot.

API

useZustandCondition<T, S, K>(
  trigger: Trigger<S>,
  name: K,
  store: { getState(): T },
  selector: (state: T) => ConditionMap<S>[K],
): void

Works with both vanilla stores (createStore) and hook stores (create).

Documentation

Full documentation, recipes and API reference at https://triggeryjs.github.io/packages/zustand/.

Related packages

• @triggery/core — Required peer — exposes Trigger<S>.
• @triggery/react — Required peer — useZustandCondition is a React hook.
• @triggery/redux — Alternative adapter for Redux stores.
• @triggery/jotai — Alternative adapter for Jotai atoms.

See the full package list in the repo README.

License

MIT © Aleksey Skhomenko