6 17.2 9.04 35 9.69 52.73.5 13.9 17.45 20.44 27.29 10.6l37.1-37.1c59.28-59.26 59.28-155.7 0-214.96z"/>
      </svg></a> </h2>
<section aria-labelledby="toc_the-action-helper">
<p>Your app will often need a way to let users interact with controls that
change application state. For example, imagine that you have a template
that shows a blog post, and supports expanding the post with additional
information.</p>
<p>You can use the <code>{{action}}</code> helper to make an HTML element clickable.
When a user cli