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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Hello DOM</title>
<script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
<script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
<script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
<div id="root"></div>
<script type="text/babel">
class MyComponent extends React.Component {
constructor(props) {
super(props);
this.myTextFocus = React.createRef();
this.handerClick = this.handerClick.bind(this);
}
handerClick() {
this.myTextFocus.current.focus();
}
render() {
return (
<div>
<input type="text" ref={this.myTextFocus} />
<input type="button" value="点击聚焦" onClick={this.handerClick} />
</div>
);
}
}
ReactDOM.render(
<MyComponent />,
document.getElementById('root')
)
</script>
</body>
</html>
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