react 入门
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://cdn.bootcss.com/react/15.4.2/react.min.js"></script>
<script src="https://cdn.bootcss.com/react/15.4.2/react-dom.min.js"></script>
<script src="https://cdn.bootcss.com/babel-standalone/6.22.1/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
// const element=<h1>dfdf</h1>
const element=(
<div>
<p>title</p>
<p>content</p>
</div>
)
function Welcome(props){
// return <h1>hello,{props.name}</h1>
return (
<div>
<h1>hello,{props.name}</h1>
<h1>hello,{props.name}</h1>
</div>
)
}
const Welcome2=(props)=>{
return <h1>hello,{props.name}</h1>
}
class Wel extends React.Component{ // 都大写
render(){
// return <h1>hi,{this.props.name}</h1>
return (
<div>
<h1>hi,{this.props.name}</h1>
<h1>fine,thank you</h1>
</div>
)
}
}
ReactDOM.render(
// <h1>Hello, !</h1>, // 1
// element, // 2
// <Welcome name={‘hehe‘}/>, // 函数式组件 3
// <Welcome2 name={‘xiaoming2‘}/>,
<Wel name={‘how are you‘}/>, // 类组件 4
document.getElementById(‘root‘)
);
</script>
</body>
</html>
原文：https://www.cnblogs.com/gyz418/p/8989361.html