Flutter Web | Create .vcf file (vCard) and download it

I am working with flutter web and would like to generate a .vcf file (vCard) out of contact information. For IOS and Android there is a nice package which does the magic and saves the file in local storage.

In this case I want to generate the file and download it on the device.

Do you have an idea how to do that? I couldn't find anything helpful for flutter web.

Thank you!