reactiv
Reactiv is not widely documented as a standalone software project. The exact identity of a project by that name is ambiguous in major software registries, and the term may refer to a niche library, a misspelling of related projects, or a fictional/placeholder name. In many discussions, similar names appear in reference to reactive programming concepts or to libraries with related goals, such as Reaktive or ReactiveX bindings.
If used as a name for a reactive programming library, reactiv would typically aim to provide primitives
Implementation and ecosystem aspects would vary by language. A language-specific version might offer a modular core
Relation to related projects is a key context: reactive libraries commonly inhabit a family that includes ReactiveX