北京海淀建设局,搜索引擎优化的流程,短视频营销成功案例,重庆涪陵网站设计公司推荐react之基于reduxjs/toolkit使用react-redux 一、配置基础环境二、使用React Toolkit 创建 counterStore三、为React注入store四、React组件使用store中的数据五、实现效果六、提交action传递参数七、异步状态操作 一、配置基础环境
1.使用cra快速创建一个react项目
npx crea… react之基于reduxjs/toolkit使用react-redux 一、配置基础环境二、使用React Toolkit 创建 counterStore三、为React注入store四、React组件使用store中的数据五、实现效果六、提交action传递参数七、异步状态操作 一、配置基础环境
1.使用cra快速创建一个react项目
npx create-react-app react-redux2.安装reduxjs/toolkit react-redux
npm i reduxjs/toolkit react-redux3.启动项目
npm start4.创建store文件 modules存储子store模块index.js组合modules中所有子模块,并导出store 整体路径 二、使用React Toolkit 创建 counterStore
nodules目录下counterStore.js
//从toolkit中引入 createSlice
import { createSlice } from reduxjs/toolkit// 定义数据
const counterStore createSlice({name: counter,//初始化stateinitialState: {count: 0,},//修改状态的方法 同步 支持直接修改reducers: {//加addFn(state) {state.count},//减delFn(state) {state.count--},},
})//解构出来actionCreater函数
const { addFn, delFn } counterStore.actions//获取reducer
const reducer counterStore.reducer//按需导出 actionCreater
export { addFn, delFn }//默认导出reducer
export default reducer
store目录下index.js
import { configureStore } from reduxjs/toolkit//引入默认导出的
import counterReducer from ./modules/counterStore//创建根store组合子模块
const store configureStore({reducer: {counter: counterReducer,},
})//导出
export default store
三、为React注入store
根目录下的index.js
//引入store
import store from ./store
//引入provider
import { Provider } from react-reduxconst root ReactDOM.createRoot(document.getElementById(root))
root.render(Provider store{store}App/App/Provider
)四、React组件使用store中的数据
根目录下的App.js
//从react-redux中引入useSelector useDispatch
import { useSelector, useDispatch } from react-redux//导入添加 减去方法
import { addFn, delFn } from ./store/modules/counterStore
function App() {//解构const { count } useSelector((state) state.counter)//得到dispatch函数const dispatch useDispatch()return (div classNameAppbutton onClick{() dispatch(delFn())}-/button{count}button onClick{() dispatch(addFn())}/buttonul/ul/div)
}export default App五、实现效果 六、提交action传递参数 七、异步状态操作
1.modules目录下channelStore.js
//从tookit中引入createSlice
import { createSlice } from reduxjs/toolkit
// 引入axios
import axios from axios
//定义数据
const listStore createSlice({name: list,//初始化initialState: {list: [],},//修改同步方法reducers: {setList(state, action) {state.list action.payload},},
})//解构出来reducers
const { setList } listStore.actions
//异步请求方法
const getList () {return async (dispatch) {const res await axios.get(接口地址)dispatch(setList(res.data.data.channels))}
}//获取reducer
const reducer listStore.reducer//导出异步方法
export { getList }//默认导出reducer
export default reducer
2.store目录下index.js
import { configureStore } from reduxjs/toolkit//引入默认导出的
import counterReducer from ./modules/counterStore
import listReducer from ./modules/channelStore
//创建根store组合子模块
const store configureStore({reducer: {counter: counterReducer,list: listReducer,},
})//导出
export default store3.页面中使用
//从react-redux中引入useSelector useDispatch
import { useSelector, useDispatch } from react-redux
import { useEffect } from react
//导入获取列表异步方法
import { getList } from ./store/modules/channelStorefunction App() {const dispatch useDispatch()useEffect(() {dispatch(getList())}, [dispatch])//解构const { list } useSelector((state) state.list)//得到dispatch函数return (div classNameAppul{list.map((item) (li key{item.id}{item.name}/li))}/ul/div)
}export default App
