Programmatic redirect for React Router 1.0

redirect.js

var { formatPattern } = require('react-router/lib/URLUtils');

/**
 * Programatic equivalent of what's done with a JSX <Redirect/>, as of 6264a91.
 *
 * See:
 * 1. https://github.com/rackt/react-router/blob/6264a91e6f037c3798553cd04ce9c0118f07c9ff/modules/RouteUtils.js#L63
 * 2. https://github.com/rackt/react-router/blob/6264a91e6f037c3798553cd04ce9c0118f07c9ff/modules/Redirect.js#L13%29
 * 3. https://github.com/rackt/react-router/blob/6264a91e6f037c3798553cd04ce9c0118f07c9ff/modules/RouteUtils.js#L25
 *
 * Usage: redirect({from: '/', to: '/index'})
 */
function redirect(options) {
  var route = Object.assign({}, options);

  if (route.from)
    route.path = route.from;

  route.onEnter = function(nextState, transition) {
    var { location, params } = nextState;
    var pathname = route.to ? formatPattern(route.to, params) : location.pathname;

    transition.to(
      pathname,
      route.query || location.query,
      route.state || location.state
    );
  };

  return route;
}

module.exports = redirect;

Hey mate,

Was looking at a solution like that for redirections in my app with React Router 1.0. But then I noticed that the History API is available and allows you to redirect, even with classes, very easily:
https://github.com/rackt/react-router/blob/master/docs/api/History.md

However, I didn't really understand how transition.to is working since you do not provide a Route object but a simple string as input param.