40行代码把Vue3的响应式集成进React做状态管理

// store.ts
import { reactive, computed, effect } from '@vue/reactivity';

export const state = reactive({
 count: 0,
});

const plusOne = computed(() => state.count   1);

effect(() => {
 console.log('plusOne changed: ', plusOne);
});

const add = () => (state.count  = 1);

export const mutations = {
 // mutation
 add,
};

export const store = {
 state,
 computed: {
 plusOne,
 },
};

export type Store = typeof store;

// Index.tsx
import { Provider, useStore } from 'rxv'
import { mutations, store, Store } from './store.ts'
function Count() {
 const countState = useStore((store: Store) => {
 const { state, computed } = store;
 const { count } = state;
 const { plusOne } = computed;

 return {
  count,
  plusOne,
 };
 });

 return (
 <Card hoverable style={{ marginBottom: 24 }}>
  <h1>计数器</h1>
  <div className="chunk">
  <div className="chunk">store中的count现在是 {countState.count}</div>
  <div className="chunk">computed值中的plusOne现在是 {countState.plusOne.value}</div>
   <Button onClick={mutations.add}>add</Button>
  </div>
 </Card>
 );
}

export default () => {
 return (
 <Provider value={store}>
  <Count />
 </Provider>
 );
};

const data = reactive({ count: 0 })
effect(() => {
 // 就是这句话 访问了data.count
 // 从而收集到了依赖
 console.log(data.count)
})

data.count = 1
// 控制台打印出1

() => {
 // 就是这句话 访问了data.count
 // 从而收集到了依赖
 console.log(data.count)
}

let data = reactive(2)
// 😭oops
data = 5

const data = ref(2)
// 💕ok
data.value= 5

export const useForceUpdate = () => {
 const [, forceUpdate] = useReducer(s => s   1, 0);
 return forceUpdate;
};

import React, { useContext } from 'react';
import { useForceUpdate, useEffection } from './share';

type Selector<T, S> = (store: T) => S;

const StoreContext = React.createContext<any>(null);

const useStoreContext = () => {
 const contextValue = useContext(StoreContext);
 if (!contextValue) {
 throw new Error(
  'could not find store context value; please ensure the component is wrapped in a <Provider>',
 );
 }
 return contextValue;
};

/**
 * 在组件中读取全局状态
 * 需要通过传入的函数收集依赖
 */
export const useStore = <T, S>(selector: Selector<T, S>): S => {
 const forceUpdate = useForceUpdate();
 const store = useStoreContext();

 const effection = useEffection(() => selector(store), {
 scheduler: forceUpdate,
 lazy: true,
 });

 const value = effection();
 return value;
};

export const Provider = StoreContext.Provider;

{
 scheduler: forceUpdate,
 lazy: true,
}

import { useEffect, useReducer, useRef } from 'react';
import { effect, stop, ReactiveEffect } from '@vue/reactivity';

export const useEffection = (...effectArgs: Parameters<typeof effect>) => {
 // 用一个ref存储effection
 // effect函数只需要初始化执行一遍
 const effectionRef = useRef<ReactiveEffect>();
 if (!effectionRef.current) {
 effectionRef.current = effect(...effectArgs);
 }

 // 卸载组件后取消effect
 const stopEffect = () => {
 stop(effectionRef.current!);
 };
 useEffect(() => stopEffect, []);

 return effectionRef.current
};

export const useForceUpdate = () => {
 const [, forceUpdate] = useReducer(s => s   1, 0);
 return forceUpdate;
};

function Logger() {
 const logs = useStore((store: Store) => {
 return store.state.logs.map((log, idx) => (
  <p className="log" key={idx}>
  {log}
  </p>
 ));
 });

 return (
 <Card hoverable>
  <h1>控制台</h1>
  <div className="logs">{logs}</div>
 </Card>
 );
}