react.js 获取真实的DOM节点实例(必看)

var MyComponent = React.createClass({ handleClick: function() {  this.refs.myTextInput.focus(); }, render: function() {  return (   <div>    <input type="text" ref="myTextInput" />    <input type="button" value="Focus the text input" onClick={this.handleClick} />   </div>  ); }});ReactDOM.render( <MyComponent />, document.getElementById('example'));