I am very new to React and so I wonder sometimes when I got something working if I did it the "correct" way.

I wrote a simple TimePickerComponent(based on [material-ui-next](https://material-ui-next.com/demos/pickers/#time-pickers)):

```
class TimePickerComponent extends React.Component {
    _placeholder;
    _defaultTimeString;
    _timeString;
    _errorStatus;
    _classes;

    constructor({ placeholder, defaultTimeString, timeString, errorStatus, classes }) {
        super();
        this._placeholder = placeholder;
        this._defaultTimeString = defaultTimeString;
        this._timeString = timeString;
        this._errorStatus = errorStatus;
        this._classes = classes;
    }

    get Placeholder() {
        return this._placeholder;
    }

    get DefaultTimeString() {
        return this._defaultTimeString ? this._defaultTimeString : CONTROLS_CONSTANTS.DEFAULT_TIME_STRING;
    }

    get TimeString() {
        return this._timeString;
    }

    get ErrorStatus() {
        return this._errorStatus;
    }

    get Classes() {
        return this._classes;
    }

    render() {
        return <FormControl>
            <TextField error={this.ErrorStatus}
                label={this.Placeholder}
                defaultValue={this.TimeString ? this.TimeString : this.DefaultTimeString}
                className={this.Classes.layout}
                type="time"
                InputLabelProps={{
                    shrink: true
                }}
            />
        </FormControl>
    }
}

TimePickerComponent.propTypes = {
    placeholder: PropTypes.string.isRequired,
    defaultTimeString: PropTypes.string,
    timeString: PropTypes.string,
    errorStatus: PropTypes.bool
}

export default withStyles(styles)(TimePickerComponent);

```

As you see I created "private" fields (I know that they are not private in this case) and in the constructor, I assign the values I got as props to these fields.

And the getters just return the private fields or include some logic like the DefaultTimeString getter.

My question now: Is this the or a correct way? Or will I have problems with this? For me, it is very straightforward and self-explaining.

Thank you in advance.