Yes, #1 hit when you Google for postgresql JavaScript: https://code.google.com/p/plv8js/ https://code.google.com/p/plv8js/ I can't vouch for any particular mat

Yes, #1 hit when you Google for postgresql JavaScript: https://code.google.com/p/plv8js/ https://code.google.com/p/plv8js/ I can't vouch for any particular maturity level but seems to have active users and it's been around a few years already.