class BankTransactions extends React.Component {
  constructor(props) {
    super(props);

    this.state = { transactions: [] };

    this.handleChange = this.handleChange.bind(this);
  }

  render() {
    return this.state.transactions.map((transaction) => {
      return (
        <div>
          <DatePicker
            onChange={this.handleChange}
            value={transaction.date}
           />
          <TextField
            onChange={this.handleChange}
            value={transaction.balance}
           />
        </div>
      );
    });
  }
}