/** * A reducer for a single todo * @param state * @param action * @returns {*}*/const todo= ( state, action ) =>{switch( action.type ) {case'ADD_TODO':return{ id: action.id, text: action.text, completed:false};case'TOGGLE_TODO':if( state.id !==action.id ) {returnstate...
Learn how to create a React todo list application using the reducers we wrote before. /** * A reducer for a single todo * @param state * @param action * @returns {*}*/const todo= ( state, action ) =>{switch( action.type ) {case'ADD_TODO':return{ id: action.id, text: action...
Learn how to create a React todo list application using the reducers we wrote before. /** * A reducer for a single todo * @param state * @param action * @returns {*}*/const todo= ( state, action ) =>{switch( action.type ) {case'ADD_TODO':return{ id: action.id, text: action...
React.render(content,document.getElementById('example')); 搭建基本结构 做好了上述的准备工作和知识了解后,就可以开始编写代码了。 TodoList有用户提交的表单和列表,先把基本的骨架写好,之后在逐个完善,在 ** entry.js ** 写入以下代码: importReact,{Component}from'react'import{render}from'react-dom'// ...
classList extends React.Component{render(){const{todos}=this.props// console.log( this.props.todos)return({todos.map((todo,index)=>{todo})})}}List.propTypes={todos:PropTypes.array.isRequired}ReactDOM.render(<App/>,document.getElementById('example'))...
store.addList(inp.value) ; inp.value='';//结束后清空输入框的值break;case'del':store.delList() ;break;case'clear':store.clearList() ;break;default: ;break; } } refNameRef =React.createRef()// 创建input输入框的refrender() { const {store}=this.propsreturn( TodoList 添加 删除 清空...
example was a celebration of you getting your feet wet with React, creating the quintessential Todo List app is a celebration of you approaching React mastery! In this tutorial, we are going to tie together alot of the concepts and techniques you've learnedto create something that works as ...
Example — TodoApp Page: 示例— TodoApp 页面 TodoList Component: 待办事项列表组件: Okay, so when it comes to React components, we can divide them into two types: Pages (or container components) and presentational components. Pages handle stuff like getting data from APIs and managing state ...
For example: Button.js import React, { Component } from 'react'; class Button extends Component { render() { // ... } } export default Button; // Don’t forget to use export default! DangerButton.js import React, { Component } from 'react'; import Button from './Button'; // Im...
用来创建/更新/删除数据时使用,最典型的例子就是一个todoList,对todo进行增删改相关的请求。使用useMutationhooks。 代码语言:javascript 复制 //例子来自官网functionApp(){//创建一条todo的mutation请求constmutation=useMutation(newTodo=>{returnaxios.post('/todos',newTodo)})return({mutation.isLoading?('Adding ...