zlib.js: JavaScript Compression Library

zlib.js is a pure JavaScript implementation of various data compression algorithms, including ZLIB (RFC1950), DEFLATE (RFC1951), GZIP (RFC1952), and PKZIP. The current stable version is 0.3.1, released in July 2017. As a pure JavaScript solution, it provides cross-environment compatibility (Node.js and browser) without native dependencies. Its key differentiator lies in offering fine-grained control over different compression types and options directly within JavaScript, contrasting with environments like Node.js that provide native bindings to zlib. However, the package has not seen updates since 2017, suggesting it is no longer actively maintained and may lack modern features, performance optimizations, or security patches compared to contemporary alternatives.