Custom element - create a multi select linked to a CMS collection

Hi everyone, I am trying to create a multi select field within a form using Weblow’s Custom elements.

I have set the tag to select and added an attribute type=multiple

This doesn’t work, does anyone know if there is there anything I am missing here ?

Thanks !

César


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

You’ll want to check HTML references when you’re generating HTML, but I think the attribute you want is something like multiple = multiple