<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>渲染列表</title>
<script src="script/react.development.js"></script>
<script src="script/react-dom.development.js"></script>
<!-- 引入babel -->
<script src="script/babel.min.js"></script>
</head>
<body>
<div ></div>
<script type="text/babel">
const name = '孙悟空';
const lang = 'cn';
/*
* {} 只能用来放js表达式,而不能放语句(if for)
* 在语句中是可以去操作JSX
* */
// const div = <div>Hello {name}</div>;
let div;
if(lang === 'en'){
div = <div>hello {name}</div>;
}else if(lang === 'cn'){
div = <div>你好 {name}</div>;
}
const data = ['孙悟空', '猪八戒', '沙和尚'];
/*
<ul>
<li>孙悟空</li>
<li>猪八戒</li>
...
</ul>
[<li>孙悟空</li>, <li>猪八戒</li>, <li>沙和尚</li>]
* */
// const arr = [];
// 遍历data
// for(let i=0; i<data.length; i++){
// arr.push(<li>{data[i]}</li>);
// }
// const arr = data.map(item => <li>{item}</li>);
// 将arr渲染为一个列表在网页中显示
// jsx中会自动将数组中的元素在页面中显示
// const list = <ul>{arr}</ul>;
const list = <ul>{data.map(item => <li>{item}</li>)}</ul>;
const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(list);
</script>
</body>
</html>