Ramda is a functional JavaScript standard library and toolset for immutable data transformation and composition. It provides a comprehensive suite of pure utility functions designed to enable declarative data processing pipelines.
The library is distinguished by its use of automatic function currying and a data-last argument order. These design patterns allow multi-argument functions to be partially applied, simplifying the construction of processing chains where data is passed through a sequence of operations.
The toolkit covers broad data manipulation capabilities, including list processing, complex object transformations such as flattening and renaming keys, and tabular data pivoting. It also supports relational operations like SQL-style object joins and numerical range scaling.
The project provides tree-shakable module exports to facilitate bundle size optimization and dead code elimination.