Javascript 目标容器不是 DOM 元素 React.js
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Target container is not a DOM element React.js
提问by Godspped
I have had a look at all the other posts that have had this issue, but I am still confused as to why I am running into this error. I made sure I used id in my
我已经查看了所有其他存在此问题的帖子，但我仍然对为什么会遇到此错误感到困惑。我确保我在我的
Just started playing with React, so I am sure its something quite silly.
刚开始玩 React，所以我确信它很愚蠢。
Thanks for the help in advance.
我在这里先向您的帮助表示感谢。
Code is below.
代码如下。
index.html
索引.html
<html>
<head>
</head>
<body>
<div id="testing"></div>
<script src="index.js"></script>
</body>
</html>
index.js
索引.js
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
ReactDOM.render(<App />, document.getElementById('testing'));
registerServiceWorker();
Full Error message:
完整的错误信息：
invariant
不变的
../app/node_modules/fbjs/lib/invariant.js:42 renderSubtreeIntoContainer
../app/node_modules/react-dom/cjs/react-dom.development.js:15144 render
../app/node_modules/react-dom/cjs/react-dom.development.js:15254
▲ 3 stack frames were expanded.
./src/index.js
../app/src/index.js:6
3 | import './index.css';
4 | import App from './App';
5 |
> 6 | ReactDOM.render(<App />, document.getElementById('testing'));
7 |
8 |
9 |
View compiled
▼ 6 stack frames were expanded.
__webpack_require__
../app/webpack/bootstrap 4755e61baeec1360d412:678
fn
../app/webpack/bootstrap 4755e61baeec1360d412:88
0
http://localhost:3000/static/js/bundle.js:35264:18
__webpack_require__
../app/webpack/bootstrap 4755e61baeec1360d412:678
./node_modules/ansi-regex/index.js.module.exports
../app/webpack/bootstrap 4755e61baeec1360d412:724
(anonymous function)
http://localhost:3000/static/js/bundle.js:728:10
采纳答案by xDreamCoding
Make sure to double check the index.html you are seeing in your browser. Assuming you use create-react-app an thereby webpack it might serve you a different file either from memory or from the public folder.
确保仔细检查您在浏览器中看到的 index.html。假设您使用 create-react-app 和 webpack，它可能会从内存或公共文件夹中为您提供不同的文件。
Mistake was found from discussion in comments and chat.
在评论和聊天中的讨论中发现了错误。
回答by Rob Johansen
You need to call React.createElement()like this:
你需要这样调用React.createElement()：
ReactDOM.render(React.createElement(<App />), document.getElementById('testing'));
回答by Front-end Developer
Check in your html file if the id attribute has the same name as
如果 id 属性与
ReactDOM.render(, document.getElementById('index'));
