import{ useReducer }from'react';importAddTaskfrom'./AddTask.js';importTaskListfrom'./TaskList.js';importtasksReducerfrom'./tasksReducer.js';exportdefaultfunctionTaskApp() {const[tasks, dispatch] =useReducer(tasksReducer, initialTasks);functionhandleAddTask(text) {dispatch({type:'added',id: nextId...
import { useReducer } from 'react'; import AddTask from './AddTask.js'; import TaskList from './TaskList.js'; export default function TaskApp() { const [tasks, dispatch] = useReducer( tasksReducer, initialTasks ); function handleAddTask(text) { dispatch({ type: 'added', id: nextId++...
import React, { Component } from 'react'; import { Provider } from 'react-redux'; import store from './store' import Router from './router' class App extends Component { render() { const store = store(); return ( <Provider store={store}> <Router></Router> </Provider> ); } ...
function reducer(state, action) { switch (action.type) { case 'increment': return { count: state.count + 1 }; case 'decrement': return { count: state.count - 1 }; default: throw new Error(); } } function Counter() { const [state, dispatch] = React.useReducer(reducer, initialState...
两个不同的变量不能同名。您需要为其中一个变量指定另一个名称。
1、创建action/actionCreator.js import { createAction } from 'redux-actions'; export const addnum = createAction('ADDNUM') 2、组件中引入使用 import React,{Component} from "react"; import store from "./store" import {addnum} from "./action/actionCreator" export default class App extends ...
什么是 reducer? In programming,reducerrefers to an function which is responsible for updating the application's state. for instance, 每一个action object可以描述一个用户的交互,reducer接管了所有action导致的state change;action object存在一个键叫做type ...
import { useReducer } from 'react'; import AddTask from './AddTask.js'; import TaskList from './TaskList.js'; export default function TaskApp() { const [tasks, dispatch] = useReducer( tasksReducer, initialTasks ); function handleAddTask(text) { dispatch({ type: 'added', id: nextId++...
上述重构将满足TypeScript，但是如果你的目标是拥有类型安全性，那么字符串值为“open”的statePayload....
redux-persist合并reducer时报错 2 回答6.5k 阅读✓ 已解决 react-redux中报错:TypeError: createStore is not a function 3 回答6.4k 阅读✓ 已解决 简单的redux,报错Cannot call a class as a function 2 回答9.2k 阅读 react+redux报错问题 1 回答1.8k 阅读 找不到问题?创建新问题产品...