How to implement ReactJS to listen to page scroll events

You need to use the scroll event of the monitoring page. After struggling for a long time, I finally realized it. I wrote it and shared it with everyone. I hope you can leave me a message if you have a better way to do it, thank you��

export class Example extends Component{
   scrollHandler = this.handleScroll.bind(this);
    componentDidMount() {
      window.addEventListener('scroll', this.scrollHandler);
    }
     _handleScroll(scrollTop) {
         console.log(scrollTop)         //滚动条距离页面的高度
        }
    }
    handleScroll(event) {
        let scrollTop = event.srcElement.body.scrollTop;
        this._handleScroll(scrollTop);
    }
}

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