How to removeListener in reactjs es6

Question

I use es6 in project of react.

componentDidMount() {
        userStore.addListener(ViewUpdateTypes.USER_UPDATE,(data)=>this._onChange(data));
        userStore.addListener(ViewUpdateTypes.FD_MENU_UPDATE,(data)=>this._onChange(data));
};

Now I want removeListener,What should I do.

Answer 1

You can do constructor and Function.prototype.bind like this.

constructor(props) {
    super(props);
    this._onChange = this._onChange.bind(this);
}
componentDidMount() {
    userStore.addListener(ViewUpdateTypes.USER_UPDATE, this._onChange);
    userStore.addListener(ViewUpdateTypes.FD_MENU_UPDATE, this._onChange);
}
componentWillUnmount() {
    userStore.removeListener(ViewUpdateTypes.USER_UPDATE, this._onChange);
    userStore.removeListener(ViewUpdateTypes.FD_MENU_UPDATE, this._onChange);
}