this.setState({ items: items, itemDetail: items[0], value: this.state.value })

constructor(props){
    super(props);
    this.state = {
      items: []
    }
    this.handleChange = this.handleChange.bind(this);
  }

  handleChange(event) {
    this.setState({ value: event.target.value });
  }

  componentDidMount(){
    const items = [
      {
        'id': 0,
        'name': 'firstName'
      },
      {
        'id': 1,
        'name': 'secondName'
      }
    ];

    this.setState({ items: items, itemDetail: items[0] });
  }


  render(){

    const { items, itemDetail } = this.state;

    console.log(itemDetail);

    return(
      <div className="container">
        {itemDetail}
      </div>
    );
  }