在网站中添加 React
作者：互联网
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>在网站中添加 React</title>
<script src="https://unpkg.com/react@17/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
<!-- Don't use this in production: -->
<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
class Test extends React.Component {
constructor(props) {
super(props);
this.state = {
list: [1, 2, 3]
}
}
componentWillMount() {
console.log("componentWillMount:组件将要被挂载。");
}
componentDidMount() {
console.log("componentDidMount:组件完成挂载，此时组件已经显示在页面上。");
}
componentWillReceiveProps() {
console.log("componentWillReceiveProps:组件将要接受新的属性。");
}
shouldComponentUpdate() {
console.log("shouldComponentUpdate：组件是否需要进行更新。此时，组件尚未被更新。");
return true;
}
componentWillUpdate() {
console.log("componentWillUpdate:组件将要被更新。");
}
componentDidUpdate() {
console.log("componentDidUpdate:此时页面被重新渲染。");
}
componentWillUnmount() {
console.log("componentWillUnmount：组件将要被卸载的时候。");
}
render() {
return (
<div id="app">
{
this.state.list.map((ele, index) => {
return <h1 key={index}>{ele}</h1>
})
}
</div>
)
}
};
ReactDOM.render(
<Test />,
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.
Read this section for a production-ready setup with JSX:
https://reactjs.org/docs/add-react-to-a-website.html#add-jsx-to-a-project
In a larger project, you can use an integrated toolchain that includes JSX instead:
https://reactjs.org/docs/create-a-new-react-app.html
You can also use React without JSX, in which case you can remove Babel:
https://reactjs.org/docs/react-without-jsx.html
-->
</body>
</html>
标签：console,log,网站,React,将要,添加,组件,return 来源： https://www.cnblogs.com/liangziaha/p/15790050.html