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')
);