以計時器為範例

// src/store/useCounter.ts
import create from 'zustand';

interface CounterState {
    count: number;
    incrementCount: () => void;
    decrementCount: () => void;
}

const useCounter = create<CounterState>((set) => ({
    count: 0,
    incrementCount: () => set((state) => ({ count: state.count + 1 })),
    decrementCount: () => set((state) => ({ count: state.count - 1 })),
    resetCount: () => set(() => ({ count: 0 })),
}));

export default useCounter;

在需要使用的檔案

import useCounter from './store/useCounter';

const { count, incrementCount, decrementCount } = useCounter();