1、错误描述
2、错误原因
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="../js/react.development.js" ></script>
<script type="text/javascript" src="../js/react-dom.development.js" ></script>
<script type="text/javascript" src="../js/babel.min.js"></script>
</head>
<body>
<div id="animal"></div>
<script type="text/babel">
class Animal extends React.Component{
render(){
return{
<label style={{fontSize:this.props.fontSize+"px",color:this.props.fontColor}}>{this.props.name}</label>
};
}
}
Animal.defaultProps = {
name:'猫',
fontSize:100,
fontColor:'#FF8899'
}
ReactDOM.render(
<Animal/>,
document.getElementById('animal')
)
</script>
</body>
</html>
在定义类Animal时，render方法中的return后面需要使用小括号，而不是大括号
3、解决办法
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="../js/react.development.js" ></script>
<script type="text/javascript" src="../js/react-dom.development.js" ></script>
<script type="text/javascript" src="../js/babel.min.js"></script>
</head>
<body>
<div id="animal"></div>
<script type="text/babel">
class Animal extends React.Component{
render(){
return(
<label style={{fontSize:this.props.fontSize+"px",color:this.props.fontColor}}>{this.props.name}</label>
);
}
}
Animal.defaultProps = {
name:'猫',
fontSize:100,
fontColor:'#FF8899'
}
ReactDOM.render(
<Animal/>,
document.getElementById('animal')
)
</script>
</body>
</html>