This is _not_ valid JavaScript. The code has a build step - yes. You will not be able to run this code without a step. It could be awesome if they allowed anno

This is _not_ valid JavaScript. The code has a build step - yes. You will not be able to run this code without a step. It could be awesome if they allowed annotations in comments like other tools do - there is a GH issue on that and it looks like it should be possible https://github.com/facebook/flow/blob/master/src/typing/comments_js.ml https://github.com/facebook/flow/blob/master/src/typing/comm...