Adding InputRange

// ...
import InputRange from 'react-input-range'

export default class Graph extends Component {
  // set the default filter value - we are hard coding this range for simplicity
  state = {
    filter: {
      min: new Date(2009, 7, 21).getTime(),
      max: new Date(2014, 7, 21).getTime()
    }
  }
// ...
  render = () => (
    <div>
      <div className="filter">
        <InputRange  
          minValue={new Date(2009, 7, 21).getTime()}
          maxValue={new Date(2014, 7, 21).getTime()}
          value={this.state.filter}
          step={86400000} // one day
          onChange={filter => this.renderGraph(filter)}
          formatLabel={value => new Date(value).toLocaleDateString()} />
      </div>
      <div ref={element => this.element = element}></div>
    </div>
  )
}