What is the best approach to modify a Contao module to surround it with a div element containing a prefix name and the module's ID?

To modify a Contao module to surround it with a div element containing a prefix name and the module's ID, you can create a custom module template file and add the necessary div element with the desired attributes. This can be achieved by modifying the template file of the module and adding the required HTML structure around the existing module content.

// Modify the template file of the module to include the div element
// Example: mod_custom_module.html5

<div id="prefix_<?php echo $this->id; ?>" class="custom-module">
    <?php echo $this->content; ?>
</div>