devicelog_18.js

export default class CreateDevice extends Component {
    constructor(props) {
        super(props);
        ...
        this.onChangeDate = this.onChangeDate.bind(this);
        this.onSubmit = this.onSubmit.bind(this);

        this.state = {
            accountname:'',
            description: '',
            duration: 0,
            date: new Date(),
            accounts: []
        };
    };
};