EntryPageContent.js:
import Grid from '@material-ui/core/Grid';
import { Box, Button } from '@material-ui/core';
import { BrowserRouter as Router, Switch, Route, useHistory } from 'react-router-dom';
function EntryPageContent (){
let history = useHistory();
const ch
我是react.js.的初学者,我遇到了这样的错误:
无法读取我的浏览器铬控制台中未定义的完全错误输出的属性“getAttribute”:
Uncaught :无法阅读未定义的属性“getAttribute”,在clickOnBlock (bundle.js:21172) at ActionLink (bundle.js:21232) at bundle.js:7557 at measureLifeCyclePerf (bundle.js:7327) at measureLifeCyclePerf (bundle.js:7556) at ReactCompositeComponentWrap
我想使用JS激活CSS。假设我有这个代码,我想第一次点击放大一张图片,然后在第二次点击后把它发送到右边,但是它不起作用。功能正确吗?
如何使用JavaScript来控制元素的CSS?
<script>
function function(){
var house = document.getElementById("house");
if(this.className == "mystyle")
this.className = "mystyle2";
我是新来的。我试图通过设置值来添加从列表中删除记录的附加功能。
这是我的App.js
import React, { useState } from "react";
import data from "./data";
import List from "./List";
function App() {
const [movies, setMovie] = useState(data);
return (
<main>
<section className='container'