_shopmsg('plugin.render', htmlElement);

More often, you will want to render an inline plugin manually. Inline plugins (checkboxes and send-to-messenger buttons) are manually placed by markup on your site which may or may not be available at the time ShopMessage initializes. If the markup is in your DOM right away, then ShopMessage will render it as soon as the SDK is loaded. Otherwise, you will need to call plugin.render manually.

<!-- checkbox will be rendered in this container -->
<div id="myCheckboxPlugin" data-shopmsg-plugin="56234"></div>
<script type="text/javascript">
  var myCheckbox = document.getElementById('myCheckboxPlugin');
  _shopmsg('plugin.render', myCheckbox);