openuicomponent/src/Son2Farther/index.jsx

this is openui

import React from 'react';
import 'style-loader!css-loader?modules!less-loader!autoprefixer-loader?{browsers:["last 2 version","Firefox 15"]}!./index.less';

class Input extends React.Component {

  constructor(props){
    super(props)
    this.state = {
      date: new Date().getTime()
    }
    this.focus = this.focus.bind(this)
  }


  focus() {
    this.el.focus();
  }

  render() {
    return (
      <input
        ref={el=> { this.el = el; }}
      />
    );
  }
}

export default class Son2Farther extends React.Component {

  componentDidMount() {
    // Note that when you use ref on a component, it’s a reference to
    // the component (not the underlying element), so you have access to its methods.
    this.InputComponent.focus();
  }

  render() {
    return (
      <div>
        <label>User name:</label>
        <Input
          ref={comp => { this.InputComponent = comp; }}
        />
      </div>
    )
  }
}