How to emulate window.location with react-router and ES6 classes

Found a solution here: https://github.com/rackt/react-router/issues/975, and here: https://github.com/rackt/react-router/issues/1499

Needed in constructor:

class SidebarFilter extends React.Component {

    constructor(props, context) {
        super(props, context);

Also need to add a static property:

SidebarFilter.contextTypes = {
  router: React.PropTypes.func.isRequired
};

Then I could call:

this.context.router.transitionTo(/path-to-link);

After wasting time with react router, I finally switch to basic javascript.

1. Create a component for your redirect:

   Route path="*" component={NotFound}

2. In the component use window.location to redirect:

    componentDidMount() {
         if (typeof window !== 'undefined') {
              window.location.href = "http://foo.com/error.php";
         }
    }