From their site, they say that "Opa generates and is fully compatible with standard JavaScript code" so it's really no different than preprocessors like CoffeeScript. So the tagline seems acceptably accurate IMO.
And is it really that odd that they've targeted Mongo to start with? Meteor has done the same thing.
Yeah I'm wondering what the differences between this and Meteor is.
Re:The Opa Framework for JavaScript
by pepijndevos on Tuesday June 18, 2013 @03:43PM
(#5901524)
http://blog.opalang.org/2012/04/one-web-app-one-language.htm...
As far as I understand, Opa has 2 killer features over Meteor: Type inference and "location inference".
While type inference is nice, I'd still prefer to mark locations explicitly.
Can't you just use node-mysql or something like that? They broke my heart when they dropped custom runtime (and ML-like syntax) in favor of Node and JS, but it should allow Opa users use Node libraries directly, no?
I like the idea of such a "framework" - it's time to abstract away all the cruft web developers need to write and focus on actual logic. I didn't use Opa or anything similar yet, but I'm keeping an eye on them and will try them at some point.
Have taken a look at http://webtoolkit.eu ?
Opa has Postgres support.
It requires almost no code change from MongoDB to Postgres, as explained in this blog post: http://www.josetteorama.com/to-sql-from-nosql/
It is odd that they still don't have any SQL database support.