title: disabled button if checkbox is unchecked
body: <p>I have an Angular component with a checkbox and a button that should be disabled if the checkbox is unchecked.
  What is the correct way for this?</p>
  
  <pre><code>&lt;div class="form-check my-5"&gt;
    &lt;input type="checkbox" class="form-check-input id="agreements"&gt;
    &lt;label class="form-check-label" for="agreements"&gt;I have signed the agreements&lt;/label&gt;
  &lt;/div&gt;
  
  &lt;button type="button" class="btn btn-outline-danger"&gt;Continue&lt;/button&gt;
  </code></pre>