您好,我正在动态地尝试在react-hooks概念中设置输入值,但我遇到了一个错误。有没有人可以帮我: 代码: import React,{useState} from 'react';
function ObjectHook() {
var [names,setName]=useState({fname:'',lname:''});
let UpdateData = (event) =>{
setName({...names,[event.target.name]:event.target.value}
我是React的新手,我正在尝试将React钩子集成到我遵循的React课程使用的一些项目中。此示例应添加一个输入字段,用于设置页面的背景颜色。当我加载页面时,在1秒后,我得到以下错误 src\App.js
Line 16:43: React Hook "useBackgroundColor" cannot be called inside a callback. React Hooks must be called in a React function component or a custom React Hook function react-hook
我试图使用在基于用户输入的功能响应中创建全局钩子,但是遇到了以下错误:
Uncaught Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breakin
我有一个名为Component1的组件,其中包含以下代码: import React, { useState } from "react";
import Popover from "material-ui-popup-state/HoverPopover";
import Fab from "@material-ui/core/Fab";
import {
usePopupState,
bindHover,
bindPopover
} from "material-ui-popup-state/hooks";
im
我想我有一个基本的问题了解状态和道具..。我有一个记录数组,当我console.log数组返回正确的记录时,.setState不会更改UI中返回的记录。我想知道是否需要将handleCommentDelete移到父组件中?以下是家长:
import React from 'react';
import { render } from 'react-dom';
import CommentForm from './CommentForm';
import CommentList from './CommentList';
cl
我是JavaScript、React和hooks的新手,我已经创建了一个React useState的钩子来增加计数器。根据下面的代码,数字会发生变化,并在一条记录上递增,但当我有多条记录时,无论我单击哪个按钮,所有计数器都会递增。我想要任何关于它为什么会这样表现的建议都会非常感谢: import React, {useState, useEffect } from 'react';
import { Link } from 'react-router-dom'
import vendors from './vendors.css'
cons
我正在尝试创建一个简单的示例,该示例遵循页的文档中的React Hooks示例
在没有useCallback的情况下,代码会按照本例中的方式查找:
import React, { useCallback } from "react";
function Test(props) {
function doSomething(a, b) {
console.log("doSomething called");
return a + b;
}
return (
<div>
{Array.from({ le