React onScroll not working - reactjs

Question

I'm trying to add onscroll event handler to specific dom element. Look at this code:
class ScrollingApp extends React.Component {
...
_handleScroll(ev) {
console.log("Scrolling!");
}
componentDidMount() {
this.refs.list.addEventListener('scroll', this._handleScroll);
}
componentWillUnmount() {
this.refs.list.removeEventListener('scroll', this._handleScroll);
}
render() {
return (
<div ref="list">
{
this.props.items.map( (item) => {
return (<Item item={item} />);
})
}
</div>
);
}
}
Code is quite simple, and as you can see, I want to handle div#list scrolling. When I was running this example, it isn't working. So I tried bind this._handleScroll on render method directly, it doesn't work either.
<div ref="list" onScroll={this._handleScroll.bind(this)> ... </div>
So i opened chrome inspector, adding onscroll event directly with:
document.getElementById('#list').addEventListener('scroll', ...);
and it is working! I don't know why this happens. Is this a bug of React or something? or did I missed something? Any device will very appreciated.

Answer 1

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 ReactDOM.findDOMNode():
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);
}
/* .... */
}