Fantasy Land
A specification for interoperability of common algebraic structures in JavaScript, enabling functional programming patterns.
What is Fantasy Land?
Fantasy Land is a specification that defines interoperability standards for common algebraic structures in JavaScript, such as Functors, Monads, and Semigroups. It solves the problem of inconsistent implementations across functional programming libraries by providing a shared set of interfaces and laws. This enables developers to write composable, predictable code that works seamlessly across different libraries.
JavaScript developers building or using functional programming libraries, as well as those interested in category theory and algebraic data types. It's particularly valuable for library authors who need to ensure their structures comply with established functional patterns.
Developers choose Fantasy Land because it provides a rigorous, law-abiding foundation for algebraic structures, ensuring interoperability between libraries. Its derivations reduce boilerplate, and its focus on mathematical correctness leads to more reliable and composable code compared to ad-hoc implementations.
Overview
Specification for interoperability of common algebraic structures in JavaScript
Use Cases
Best For
- Implementing lawful Functors, Monads, or other algebraic structures in JavaScript libraries
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