使用 babel 编译时出现 ESLint 错误：

• 第 28 行：期望赋值或函数调用，却看到了一个表达式 no-unused-expressions

• 第 29 行：期望赋值或函数调用，却看到了一个表达式 no-unused-expressions

知道如何摆脱这些同时让我的计时器仍然按预期工作吗？或者你有更好的方法让我做我的计时器吗？

class RequestTimer extends Component {
    constructor(props) {
        super(props);

        this.state = {
            seconds: 0,
            minutes: 0,
            hours: 0
        }

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

    getTime() {
        let second = this.state.seconds
        let minute = this.state.minutes;
        let hour = this.state.hours; 

        this.state.seconds % 59 === 0 && this.state.seconds !== 0 ? minute += 1:null;
        this.state.minutes % 59 === 0 && this.state.seconds % 59 === 0 && this.state.minutes !== 0 ? (hour += 1, minute = 0):null;

        this.setState({
            seconds: second +=1,
            minutes: minute,
            hours: hour
        })
    }

    componentDidMount() {
        this.timer = setInterval(this.getTime, 1000)
    }

    render() {
        return (
            <TimerContainer>
                <h2>Last Request:</h2>
                <p>{this.state.hours}h {this.state.minutes}m {this.state.seconds % 60}s</p>                
            </TimerContainer>
        )
    }
}