="#C4_L16" id=C4_L16></a><a href="#C4_L17" id=C4_L17></a><a href="#C4_L18" id=C4_L18></a></span></code></pre></div>
<p>If the <code>loading</code> handler is not defined at the specific route,
the event will continue to bubble above a transition's parent
route, providing the <code>application</code> route the opportunity to manage it.</p>
<p>When using the <code>loading</code> handler, we can make use of the transition promise to know when the loading event is over:</p>
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