Why react-native routers use state instead of props?
<p>There is <a href="https://github.com/facebook/react-native/blob/master/Examples/UIExplorer/Navigator/NavigationBarSample.js#L92" rel="nofollow">an official react-native example</a> regarding routing which uses props instead of state.</p>

<p>However all other router component libraries use state instead of props. Especially, the libraries that have prepared for <code>Flux</code> and <code>Redux</code> usages.</p>

<p>What is the main idea of state usage in router components?</p>