<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>对props进行限制</title>
</head>
<body>
<!-- 准备好一个“容器” -->
<div id="test1"></div>
<div id="test2"></div>
<div id="test3"></div>
<!-- 引入react核心库 -->
<script type="text/javascript" src="../js/react.development.js"></script>
<!-- 引入react-dom，用于支持react操作DOM -->
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<!-- 引入babel，用于将jsx转为js -->
<script type="text/javascript" src="../js/babel.min.js"></script>
<!-- 引入prop-types，用于对组件标签属性进行限制 -->
<script type="text/javascript" src="../js/prop-types.js"></script>
<script type="text/babel">
//创建组件
class Person extends React.Component{
render(){
// console.log(this);
const {name,age,sex} = this.props
//props是只读的
//this.props.name = 'jack' //此行代码会报错，因为props是只读的
return (
<ul>
<li>姓名：{name}</li>
<li>性别：{sex}</li>
<li>年龄：{age+1}</li>
</ul>
)
}
}
//对标签属性进行类型、必要性的限制
Person.propTypes = {
name:PropTypes.string.isRequired, //限制name必传，且为字符串
sex:PropTypes.string,//限制sex为字符串
age:PropTypes.number,//限制age为数值
speak:PropTypes.func,//限制speak为函数
}
//指定默认标签属性值
Person.defaultProps = {
sex:'男',//sex默认值为男
age:18 //age默认值为18
}
//渲染组件到页面
ReactDOM.render(<Person name={100} speak={speak}/>,document.getElementById('test1'))
ReactDOM.render(<Person name="tom" age={18} sex="女"/>,document.getElementById('test2'))
const p = {name:'老刘',age:18,sex:'女'}
// console.log('@',...p);
// ReactDOM.render(<Person name={p.name} age={p.age} sex={p.sex}/>,document.getElementById('test3'))
ReactDOM.render(<Person {...p}/>,document.getElementById('test3'))
function speak(){
console.log('我说话了');
}
</script>
</body>
</html>
