How to get the value of the Rangepicker which having the time with Ant Design?

Question

I have a table of Rangepicker of the date and the time, this table is dynamically which I can add and remove these range picker as you look at the picture below :

I want to store these values on another table to send it to the backend and when I have value on the Rangepicker, I get an error.

My code is :

import { DatePicker } from 'antd';
import moment from 'moment-timezone';
import fr_FR from 'antd/lib/locale-provider/fr_FR';
import "moment/locale/fr";
const { RangePicker } = DatePicker;
export default class App extends Component {
constructor(props) {
    super(props);
    this.state= {
        tranches :[{date:null}]
    }
  onChange(value, dateString) {
    console.log('Selected Time: ', value);
    console.log('Formatted Selected Time: ', dateString)
  }
  onOk(value) {
    console.log('onOk: ', value);
  }
  render() {
    return (
       <div>
         { 
                      this.state.tranches.map((el, i) => 
                        <Row key={i}>
                          <Col span={12}>
                            &nbsp; &nbsp; &nbsp;
                            <label className="pt-label .modifier"><strong>Période</strong></label>
                            <LocaleProvider locale={fr_FR}>
                              <RangePicker 
                                allowClear={false}
                                id="date" name= "date"
                                style={{ width: '547px', marginLeft:'20px'}} 
                                locale="fr" 
                                //placeholder={["Date de début","Date de fin"]} 
                                separator="-" 
                                onChange={this.onChange}
                                showTime={{ format: 'HH:mm' }}
                                format="DD/MM/YYYY HH:mm"
                                placeholder={['Date et heure de début', 'Date et heure de fin']}
                                onOk={this.onOk}
                              />
                            </LocaleProvider>
                          </Col>
                          <Col span={12}>
                            {i === 0 ? 
                                        <>                      
                                      <Icon type="plus-circle" theme="twoTone" twoToneColor="#52c41a"  onClick={this.ajouterTranche}/> 
                                          <br/> 
                                        </>
                                      :
                                        <>
                                       <Icon type="close-circle" theme="twoTone" twoToneColor="red"  onClick={this.supprimerTranche(i)}/>

                                          <Icon type="plus-circle" theme="twoTone" twoToneColor="#52c41a"  onClick={this.ajouterTranche}/>  
                                          <br/>
                                        </> 
                                      }
                          </Col>
</Row>
                    )}
}

How can I fix it ?

Answer 1

 onChangeDate(value) {
    this.setState({date: value});
 };


onChange{this.onChangeDate.bind(this)}

Answer 2

Change

onChange(value, dateString) {
 console.log('Selected Time: ', value);
 console.log('Formatted Selected Time: ', dateString)
}

to

onChange = (value, dateString) => {
 let date = this.state.date
 date.push(value)
 this.setState({date: date})
}

Link here The x icon is not functional in the above link