Sure there are many code generators easily to find in the internet, but none of them is small enough to fit for Espruino.
I don't know anything offhand, but there seem to be a bunch of different barcode styles. If you stuck with just one type I think it would be pretty easy to do from scratch. For instance EAN-13 doesn't look too painful:
But I guess you might want UPC?
Thanks, was not searching on Wiki.
Most companies use Code 128, wiki pointed to this nice barcode-svg repo which looks promising.
Looks very promising! If you get it working nicely it might be nice to bring it into Espruino as a module?
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