CSS ID/class issue with module inside article

Hi,
I created my own module (with custom HTML) which I'd like to use as element in an article. Inside the properties of that element (under 'Expert Setings') you can give that element a CSS ID/class. But while loading the page the CSS selector doesn't show up. I think I have to insert {{id}} or {{class}} somewhere. But the manual (https://docs.contao.org/books/manual...sert-tags.html) doesn't say anything about ID's or classes. What to do?
Thanks, Sander

If you include a module as CE in an article, the class and id of the module will get lost. This is a known limitation. This only works, if you include the module in a layout.

Write the class and id direct into the HTML-Code or set class and id in the CE where you include your module.

Or use this extension: [mergecssclasses]

Thanks guys!