title: id undefined in onChange event
body: <p>Using react <a href="https://github.com/Hacker0x01/react-datepicker" rel="nofollow">datepicker</a>, I am trying to get the id of the clicked component</p>
  
  <pre><code>&lt;DatePicker
  id={cellData.column}
  selected={DatePickerDate}
  onChange={this.onDateRangePickerChange}
  className='form-control'
                      /&gt;
  </code></pre>
  
  <p>In my click handler the event being passed is a moment date object, so <code>event.currentTarget</code> is undefined.</p>
  
  <pre><code>onDateRangePickerChange: function(event, picker){
  
          var localRowDataStack = _.cloneDeep(this.state.rowDataStack);
          localRowDataStack[event.currentTarget.id] = picker.startDate.format(appConfig.getKey('dateFormat'));
          this.setState({
              rowDataStack: localRowDataStack,
              isOmitReRender: false
          });
  
  },
  </code></pre>
  
  <p>How can I get the id of the clicked datepicker?</p>