SyntaxError: Invalid left-hand side in assignment when using Parser.prototype.parse or Parser.prototype.encode

[ifacodes]

This is the error I get!

This library as well as keichi's one worked before, but now they both don't! going back to the previous version it remains broken, so I suspect something that is happening here may no longer be supported?

Kinda sucks cause this is a key part of one of my applications I'm working on, and there doesn't seem to be any well maintained alternatives.