 transitions, the
currently active transition won't be aborted.</p>
<p>Once the main transition into <code>slow-model</code> completes, the <code>loading</code>
route will be exited and the transition to <code>slow-model</code> will continue.</p>
<p>For nested routes, like:</p>
<div class="filename javascript"><div class="ribbon"></div><span>app/router.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript">Router<span class="token punctuation">.</span><span class