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Current, Flow is not released even in version 1.0.0, but it is already flexible enough to allow creation type systems in different ways. I decided to share a set of rules, that from my experience, are making types system based on Flow more stable, reliable, predictable, and useful.
Why add Flow to the project
1. Refactoring freedom
When flow annotations are added to the files, it looks like the right thing to do, but it fully shines when one decides to refactor component or function, as there will be no need to keep in memory where the component or function was used. For example, one has changed the type of the arguments, that utility function will accept as arguments. If the project has sufficient flow coverage, logs of flow errors will lead to all places where this change will require changing the arguments with which function was called.Continue reading →