The article revisits a historical debate about incorporating monads and category theory into JavaScript promises, arguing that nested promises could benefit from such functional programming concepts. It explains how promises relate to monads and functors, using examples to illustrate their utility in asynchronous programming. The author reflects on reconsidering their stance based on practical use cases for nested promises.
Background
Promises in JavaScript are a standard way to handle asynchronous operations, but there has been historical debate about aligning them with functional programming concepts like monads. The Promises/A+ spec development included discussions on incorporating category theory, which was contentious among developers.
- Source
- Lobsters
- Published
- Mar 27, 2026 at 11:24 PM
- Score
- 6.0 / 10