We know only two open source JS projects that even support alphanumeric, Nayuki and Paul’s. https://github.com/Cyphrme/QRGenJS. We have it hosted here: https://cyphr.me/qrgen
I’ve also done a lot of work on this problem: https://image-ppubs.uspto.gov/dirsearch-public/print/downloa...
Also, regarding alphanumeric, RFC 3986 states that:
> An implementation should accept uppercase letters as equivalent to lowercase in scheme names (e.g., allow “HTTP” as well as “http”)
We know only two open source JS projects that even support alphanumeric, Nayuki and Paul’s. https://github.com/Cyphrme/QRGenJS. We have it hosted here: https://cyphr.me/qrgen
I’ve also done a lot of work on this problem: https://image-ppubs.uspto.gov/dirsearch-public/print/downloa...
Also, regarding alphanumeric, RFC 3986 states that:
> An implementation should accept uppercase letters as equivalent to lowercase in scheme names (e.g., allow “HTTP” as well as “http”)