react使用react-redux状态管理

大得3692025-01-20 12:11

1、安装

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npm install react-redux

2、创建store.js

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import { createStore } from 'redux';

// 定义初始状态
const initialState = {
    counter: 888
};

// 定义 reducer 函数，根据 action 类型更新状态
function reducer(state = initialState, action) {
    switch (action.type) {
        case 'INCREMENT':
            return {...state, counter: state.counter + 1 };
        case 'DECREMENT':
            return {...state, counter: state.counter - 1 };
        default:
            return state;
    }
}

// 创建 store
const store = createStore(reducer);

export default store;

3、在主文件index.tsx全局引入

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import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
// redux全局参数
import { Provider } from 'react-redux';
import store from './store/store.js';

const root = ReactDOM.createRoot(
  document.getElementById('root') as HTMLElement
);
root.render(
	<Provider store={store}>
		<React.StrictMode>
			<App />
		</React.StrictMode>
	</Provider>
);
reportWebVitals();

4、使用

1、在两个tex文件引入使用查看效果

第一个tex文件

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//引入
import store from '../store/store';

console.log("大得333")
//获得打印
console.log(store.getState().counter)
//修改
store.getState().counter = 6666

第二个文件

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import store from './store/store';
function dade(){
	// 获取状态
	console.log("大得")
	console.log(store.getState().counter)
	store.getState().counter = 999
	console.log(store.getState().counter)
}
dade()

效果