未加载React'Hello World'
[英]React 'Hello World' Is not Loaded
问题描述
I am extremely new to React as this is my First Lesson. 
我对React非常陌生，因为这是我的第一课。 Following is my code: 以下是我的代码：
index.html: index.html：
<!DOCTYPE html>
<html lang="en">
<head>
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<meta charset="UTF-8">
<title>Hello World with React</title>
</head>
<body>
<div id= "react-container"></div>
<script src="index.js"></script>
</body>
</html>
index.js: index.js：
const title = React.createElement(
'h1'
{id: 'title', className: 'header'},
'Hello World'
)
ReactDOM.render(
title,
document.getElementById('react-container')
)
However, nothing is rendered in the browser. 但是，浏览器中没有任何内容。 Both the script and the Html page is in the same folder. 脚本和HTML页面都在同一文件夹中。 There must be a very simple mistake, so please anyone help me on this? 肯定有一个非常简单的错误，所以请有人帮助我吗？ Thanks for your time! 谢谢你的时间！
4 个解决方案
解决方案1
1 2018-03-05 04:32:01
You're missing a , after your 'h1' 在您的'h1'之后，您缺少,
const title = React.createElement( 'h1', { id: 'title', className: 'header' }, 'Hello World' ) ReactDOM.render( title, document.getElementById('react-container') ) /**/
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script> <div id="react-container"></div>
解决方案2
1 已采纳 2018-03-05 04:34:50
You are just missing a comma in createElement . 您只是在createElement缺少逗号。 The syntax being 语法是
React.createElement(component, props, ...children)
const title = React.createElement( 'h1', { id: 'title', className: 'header' }, 'Hello World' ) ReactDOM.render( title, document.getElementById('react-container') )
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script> <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <div id="react-container"></div>
Good luck with React! 用React祝你好运！
解决方案3
0 2018-03-05 04:30:03
<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>Hello World</title> <script src="https://unpkg.com/react@16/umd/react.development.js"></script> <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script> </head> <body> <div id="root"></div> <script type="text/babel"> ReactDOM.render( <h1>Hello, world!</h1>, document.getElementById('root') ); </script> <!-- Note: this page is a great way to try React but it's not suitable for production. It slowly compiles JSX with Babel in the browser and uses a large development build of React. To set up a production-ready React build environment, follow these instructions: * https://reactjs.org/docs/add-react-to-a-new-app.html * https://reactjs.org/docs/add-react-to-an-existing-app.html You can also use React without JSX, in which case you can remove Babel: * https://reactjs.org/docs/react-without-jsx.html * https://reactjs.org/docs/cdn-links.html --> </body> </html>
解决方案4
0 2018-03-05 04:33:47
there is not , after the hi string. 没有,后hi字符串。 put it 把它
const title = React.createElement(
'h1',
{id: 'title', className: 'header'},
'Hello World'
)
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