vue有ref来获取template里面的子组件/子元素，react当然也有：
<!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>Document</title> </head> <body> <div id="app"></div> <script src="common/react.js"></script> <script src="common/react-dom.js"></script> <script src="https://cdn.bootcss.com/babel-core/5.8.38/browser.js"></script> <script type="text/babel"> class App extends React.Component { constructor(opts) { super(opts) this.focus = this.focus.bind(this) } focus() { //this.refs.amie获取的是原生的"<input ref="amie" type="text" />"DOM this.refs.amie.focus() } render() { return <div> <input ref="amie" type="text" /> <input type="button" value="focus" onClick={this.focus}/> </div> } } ReactDOM.render( <App />, document.getElementById(‘app‘) ) </script> </body> </html>
