add and remove listner

react-class-es6.js

import React from 'react';
import MyStore from './MyStore';

class MyComponent extends React.Component {
  componentDidMount() {
    MyStore.addChangeListener(this._onChange.bind(this));
  }

  componentWillUnmount() {
    MyStore.removeChangeListener(this._onChange.bind(this)); // not working
    MyStore.removeChangeListener(this._onChange); // not working, too
  }

  render() {
    return (
      <div></div>
    );
  }

  _onChange(){
    this.setState(/* set something */);
  }
}

export default MyComponent;

class Tooltip extends React.Component {
    constructor (props) {
        super(props);

        this.state = {
             handleOutsideClick: this.handleOutsideClick.bind(this)
        };
    }

    componentDidMount () {
         window.addEventListener('click', this.state.handleOutsideClick);
    }

    componentWillUnmount () {
         window.removeEventListener('click', this.state.handleOutsideClick);
    }
}