Union Types in Flow & Reason – Jake ZimmermanUnion types are powerful yet often overlooked. At work, I’ve been using Flow which thankfully supports union types. But as I’ve refactored more of our code to use union types, I’ve noticed that our bundle size has been steadily increasing! In this post, we’re going to explore why that’s the case. We’ll start with a problem which union types can solve, flesh out the problem to motivate why union ty
Comparison with Facebook Flow Type System · Issue #1265 · microsoft/TypeScript
