1. 问题
页面中存在多个元素（存在父子关系）监听onScroll时，可能子元素的不生效
2. 解决
The root of the problem is that this.refs.list is a React component, not a DOM node. To get the DOM element, which has the addEventListener() method, you need to call
class ScrollingApp extends React.Component {
_handleScroll(ev) {
console.log("Scrolling!");
}
componentDidMount() {
const list = ReactDOM.findDOMNode(this.refs.list)
list.addEventListener('scroll', this._handleScroll);
}
componentWillUnmount() {
const list = ReactDOM.findDOMNode(this.refs.list)
list.removeEventListener('scroll', this._handleScroll);
}
/* .... */
}
