Union Types in Flow & Reason – Jake Zimmerman
Union 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
Linting in Flow
In the past, Flow has had to make some tough decisions about what counts as a type error, and what we should surface in our analysis. Some things, like enforcing function call parameter counts, made the cut. Others, like erring when importing types from an untyped file, didn’t. With version 0.52 we’re rolling out the new Flow linter, creating a framework that lets us report things we find that are
Flow Type Cheat Sheet - SaltyCrane
Flow is a static type checker for JavaScript. This is a list of Flow types generated from the source code in https://github.com/facebook/flow/tree/v0.111.3/ The script to generate this list is on github. Fixes welcome. See also my TypeScript cheat sheet, TypeScript React cheat sheet, and Docker cheat sheet. There are separate sections for "private" or "magic" types with a $ in the name. See the no
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Case Exhaustiveness in Flow – Jake Zimmerman
