react-fail.js

import React from 'react';
class MyComponent extends React.Component {
  handleClick() {
    const { data } = this.state;
    this.setState({
      data: data + 1
    });
  }
  render() {
    return (
      <button onClick={this.handleClick.bind(this)}>
        Click me!
      </button>);
  }
}