Support for flow (a static typechecker for JavaScript) about check-build

[danielstjules]

Not sure that this is particularly helpful for any existing js projects. Flow will simply report hundreds to thousands of global/require errors, and that's with the weak annotations. Solving that involves a lot of leg work in declaring interfaces for all the third party modules you use, e.g. https://github.com/facebook/flow/blob/master/examples/flux-chat/lib/events.js

[ruimarinho]

I actually think it is a good idea since it can be an opt-in feature for those would like to statically check their code on a "build check". Right now the only drawback I see with flow is that support for ES6 code is still in its early stage, so it isn't much valuable for me at this point (lack of support for generators).

[danielstjules]

Until they port over interfaces from https://github.com/borisyankov/DefinitelyTyped to flow, it's still not very practical for existing projects. If you had an Express app, you'd first be looking to write interfaces for all the modules you required, e.g. https://github.com/borisyankov/DefinitelyTyped/blob/master/express/express.d.ts Or what if you used jQuery for some client-side code? https://github.com/borisyankov/DefinitelyTyped/blob/master/jquery/jquery.d.ts Doesn't seem like a quick opt-in to me. That requires a pretty big investment from devs.

Not bashing flow itself, which I think is a nice alternative to TypeScript. And that's the key. The project might be getting promoted as a means of augmenting JS with better type safety, but it's really a new language. Hence the parallels to TypeScript.

[FGRibreau]

Ok, my bad, I read flow description too fast, it's clearly a new langage on top of JavaScript, not a static JavaScript type checker, closing this integration for now.