Pure Random Number Generators

Pure-rand is a JavaScript and TypeScript library providing fast, pure pseudorandom number generators (PRNGs). Its core differentiator is the emphasis on purity: generator instances are immutable. This means each random number generation operation returns a new generator state alongside the generated value, enabling reproducible sequences and eliminating side effects, which is crucial for deterministic simulations, testing, and cryptographic applications where state integrity is paramount. The library offers various PRNG algorithms, such as Xoroshiro128+, and implements common statistical distributions like uniform integers. Currently at version 8.4.0, pure-rand maintains an active development and release cadence, providing reliable and performant random number generation. It aims to offer predictable and verifiable randomness, setting it apart from libraries that mutate generator state in place.