[react.js] リアクトでイベントリスナー

const element =  findDOMNode(this.refs.element);
element.addEventListener('mouseover'),(e)=>{
  this.mouseover(e);
});
element.addEventListener('mouseout'),(e)=>{
  this.mouseout(e);
});

こうしてあげる

this._mouseover = this.mouseover.bind(this);
this._mouseout = this.mouseout.bind(this);</p>
<p>const element =  findDOMNode(this.refs.element);
element.addEventListener('mouseover'),(e)=>{
  this._mouseover(e);
});
element.addEventListener('mouseout'),(e)=>{
  this._mouseout(e);
});