So this is a way to generate type annotations for you from JS? The application must be to generate typescript as an example?
I would encourage you to add some reasoning to your site.
I would encourage you to add some reasoning to your site.
As a brief reply here, it provides the ability to do statical type inference for javascript without writing additional code. With this ability, libraries or editors can perform better on code assistant/suggestion, linting, statical analysis, annotation generation for or not for typescript/flow, and so on.