Pick the programming language you know best. I’ll pick JavaScript. Now imagine every value you could create in that language. Yes, every value. In JavaScript, you’d have numbers like 0, 1, -42, and 3.14. You’d have strings like the empty string "" or the classic "Hello, World!". You’d have objects…

Over the last year, the Flow team has been slowly auditing and improving all the possible error messages generated by the type checker. In Flow 0.66 …

Learn what some of the unexpected costs of GraphQL non-null fields are. — In the GraphQL type system all types are nullable by default. This means that a type like Int can take any integer (1, 2, etc.) or null which represents the absence of any value. However, the GraphQL type system allows you to make any type non-null which means that the…

The first version of Flow support for React was a magical implementation of React.createClass(). Since then, React has evolved significantly. It is time to rethink how Flow models React. In Flow 0.53.0 we are changing how Flow models React and in doing this we can provide better types for higher-order…

I currently have three conference talk proposals that contain ideas which I really want to explore. Even if I never end up giving a talk on these ideas I want to put these out into the world anyway and start talking about these ideas. I also think you will enjoy…

Design principles for building effective GraphQL mutation systems that can evolve over time — Designing a good GraphQL API is tricky, because you always want to balance utility and convenience with a consideration around how the API may evolve in the future. The main points to consider when designing your GraphQL mutations are: Naming. Name your mutations verb first. Then the object, or “noun,”…

Control normalized data with a GraphQL-native interface — GraphQL is strongest when it is a unified access point to your organization’s entire data universe: You may have a plethora of micro-services churning away in the background, but your GraphQL consumer doesn’t need to know those details. …

Edges have never been so fun! — I don’t read many books these days, but I do listen to books. Thanks to the incessant work of the Audible marketing team Amazon has converted me into an audiobook consumer. …

Meditation is incredibly difficult for me. First, I sit down. Second, I do some stuff with my arms and legs that I’m sure looks “zen.” Third, I’ll start deep-breathing, or what I think is deep-breathing because who has formal training in deep-breathing? Within two seconds my phone has buzzed, a…