to <code>null</code> or <code>undefined</code>,
the helper renders nothing. When the parameter changes, the currently rendered
component is destroyed and the new component is created and brought in.</p>
<p>Picking different components to render in response to the data allows you to
have a different template and behavior for each case. The <code>{{component}}</code> helper
is a powerful tool for improving code modularity.</p>
</section>
<h2 id="toc_learn-more">Learn More <a href="#toc_learn-more"><svg xmlns=