13.09a16.1 16.1 0 0 0-3.77 16.6c5.86 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_components">
<p>While templates describe how a user interface looks, components control how the user interface <em>behaves</em>.</p>
<p>Components consist of two parts: a template written in Handlebars, and a source file written in JavaScript that defines the component's behavior. For example, our property rental applic