我正在尝试将基于此类的类转换为基于功能组件的类 这是实际的基于类别的代码 import React, { Component } from 'react'; import L from 'leaflet' import { Map, TileLayer, Marker, Popup } from 'react-leaflet'; import './App.css'; // Icon properties var myIcon = L.icon({ iconUrl: 'data:image/png;b...

我尝试了很多博客和教程，但仍然无法解决。 They all using useState but in my case i used context hook. How can I achieve something like this medium blog or this one Simple Load more with React 无法确定我可以将“ getStudents”放在带有更多加载功能的useEffect挂钩中的位置。 学生.js import { CSSTransition, Trans...

I am trying to get page data which is coming from redux store and pass this to local state named pagination. This pagination state is further passed to child component. But the Problem is whenever i try to pass redux state to local state i get error undefi...

我有3个materialUI TextField，要渲染n次（n是渲染表单字段之前用户的整数输入，这里我将其存储在名为groupMembersCount的变量中）。 我在ReactJS中使用功能组件，将useState挂钩定义为一个数组： const [groupDetails, setGroupDetails] = React.useState([ { fullName: "", phoneNo: "", gender: "" }, ]); 这将是我的主要数组，将所有3个值（用户输入）保存在...

我有2个组件，如下所示。当我尝试将方法（增量）从组件“ CartList”传递给“ CartItem”时，它说增量未定义。当我单击按钮时出现错误（在下面的代码中指出）。我该如何解决这个错误？ 父母 import React, {Component} from 'react'; import CartItem from './CartItem'; import {connect} from "react-redux"; import Axios from "axios"; const mapStateTo...

I'm trying out to work on integrating a library called react-phone-number-input with my multi-step react form as per the following as a functional component: import React, { useState } from "react"; import Helmet from "react-helmet"; import "./reg-style/Cr...

以下问题的布局如下所示： . ├── components │ ├── ModalPolicy.js │ ├── Footer │ ├── index.js ├── pages │ ├── index.js I've tried to render the Modal on Footer/index.js but it didn't show up (as the one we have in pages/index.js does). Therefore, I'd like to...

I am trying to follow the react tutorial on their official site: https://reactjs.org/tutorial/tutorial.html 唯一的区别是我尝试仅通过使用功能组件来实现它，这是我在代码笔上的代码： See the Pen React tutorial functional component by Snedden Gonsalves (@snedden-gonsalves) on CodePen. 总...