oller (which we&#8217;ll see in the next example). All outputs get generated on page load by default. If we want an output <em>not</em> to load on the page load, we can also specify an &#8220;on_page_load&#8221; attribute and set it to False.</p>
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<div class="section" id="controls">
<h3>controls<a class="headerlink" href="#controls" title="Permalink to this headline">¶</a></h3>
<p>Controls are one mechanism by which a spyre app can update its outputs. A control&#8217;s <cite>id</cite> can be referenc